TY  - CONF
AU  - Marković, Gordana
AU  - Manojlović, Vaso
AU  - Sokić, Miroslav
AU  - Ruzic, Jovana
AU  - Milojkov, Dušan
AU  - Patarić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7362
AB  - Titanium alloys are widely employed in various fields, particularly in biomedical engineering, due to their mechanical  and corrosion resistance properties combined with good biocompatibility. The modulus of elasticity is a distinguishing  feature of this group of materials compared to others used for similar purposes. A database of approximately 238 titanium alloys free of toxic elements was compiled for this study. The influence of different factors (such as alloy element  proportions, density, and specific heat) on the modulus of elasticity was predicted using four methods: support vector machine, XGBoost, Neural Network, and Random Forest. The Random Forest mean absolute error (MAE) of 7.33 GPa, falls within the range of experimentally obtained absolute errors in the literature (up to about 11 GPa). A strong correlation (R2 = 0.72) was observed between experimental and predicted data. Lastly, specific alloying element regions were identified for the modulus of elasticity, which can be used to design new biocompatible titanium alloys in the future.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning
SP  - 154
EP  - 158
UR  - https://hdl.handle.net/21.15107/rcub_cer_7362
ER  - 

@conference{
author = "Marković, Gordana and Manojlović, Vaso and Sokić, Miroslav and Ruzic, Jovana and Milojkov, Dušan and Patarić, Aleksandra",
year = "2023",
abstract = "Titanium alloys are widely employed in various fields, particularly in biomedical engineering, due to their mechanical  and corrosion resistance properties combined with good biocompatibility. The modulus of elasticity is a distinguishing  feature of this group of materials compared to others used for similar purposes. A database of approximately 238 titanium alloys free of toxic elements was compiled for this study. The influence of different factors (such as alloy element  proportions, density, and specific heat) on the modulus of elasticity was predicted using four methods: support vector machine, XGBoost, Neural Network, and Random Forest. The Random Forest mean absolute error (MAE) of 7.33 GPa, falls within the range of experimentally obtained absolute errors in the literature (up to about 11 GPa). A strong correlation (R2 = 0.72) was observed between experimental and predicted data. Lastly, specific alloying element regions were identified for the modulus of elasticity, which can be used to design new biocompatible titanium alloys in the future.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning",
pages = "154-158",
url = "https://hdl.handle.net/21.15107/rcub_cer_7362"
}

Marković, G., Manojlović, V., Sokić, M., Ruzic, J., Milojkov, D.,& Patarić, A.. (2023). Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 154-158.
https://hdl.handle.net/21.15107/rcub_cer_7362

Marković G, Manojlović V, Sokić M, Ruzic J, Milojkov D, Patarić A. Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:154-158.
https://hdl.handle.net/21.15107/rcub_cer_7362 .

Marković, Gordana, Manojlović, Vaso, Sokić, Miroslav, Ruzic, Jovana, Milojkov, Dušan, Patarić, Aleksandra, "Predicting the modulus of elasticity of biocompatible titanium alloys using machine learning" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):154-158,
https://hdl.handle.net/21.15107/rcub_cer_7362 .

TY  - CONF
AU  - Patarić, Aleksandra
AU  - Marković, Gordana
AU  - Đorđević, Nataša G.
AU  - Mihajlović, Slavica
AU  - Mihailović, Marija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6248
AB  - Cobalt–chromium–molybdenum (CoCrMo) alloys are known for medical use due to their biocompatibility, corrosion and  wear resistance. The chemical and phase composition, as well as microstructure of the alloy directly affect the mechanical  properties. In this investigation, CoCrMo alloy samples were obtained by vacuum precise casting. The procedure of  melting and casting process as well as their parameters are given. Molds fabricated of copper, gray iron, steel, ceramics  and graphite were used during the casting process. In this way, the cooling rate influence on the obtained microstructure  was examined. Besides, different casting temperatures (1400°C, 1450°C and 1500°C) were applied for each kind of mold.  After metallographic preparation, the microstructure was examined on the cross section of samples by optical microscopy.  The obtained results show that by increasing the cooling rate, the microstructure of samples become finer and more  homogeneous.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
T1  - Microstructure assessment of Co alloy intended for dentistry
SP  - 221
EP  - 225
UR  - https://hdl.handle.net/21.15107/rcub_cer_6248
ER  - 

@conference{
author = "Patarić, Aleksandra and Marković, Gordana and Đorđević, Nataša G. and Mihajlović, Slavica and Mihailović, Marija",
year = "2023",
abstract = "Cobalt–chromium–molybdenum (CoCrMo) alloys are known for medical use due to their biocompatibility, corrosion and  wear resistance. The chemical and phase composition, as well as microstructure of the alloy directly affect the mechanical  properties. In this investigation, CoCrMo alloy samples were obtained by vacuum precise casting. The procedure of  melting and casting process as well as their parameters are given. Molds fabricated of copper, gray iron, steel, ceramics  and graphite were used during the casting process. In this way, the cooling rate influence on the obtained microstructure  was examined. Besides, different casting temperatures (1400°C, 1450°C and 1500°C) were applied for each kind of mold.  After metallographic preparation, the microstructure was examined on the cross section of samples by optical microscopy.  The obtained results show that by increasing the cooling rate, the microstructure of samples become finer and more  homogeneous.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina",
title = "Microstructure assessment of Co alloy intended for dentistry",
pages = "221-225",
url = "https://hdl.handle.net/21.15107/rcub_cer_6248"
}

Patarić, A., Marković, G., Đorđević, N. G., Mihajlović, S.,& Mihailović, M.. (2023). Microstructure assessment of Co alloy intended for dentistry. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 221-225.
https://hdl.handle.net/21.15107/rcub_cer_6248

Patarić A, Marković G, Đorđević NG, Mihajlović S, Mihailović M. Microstructure assessment of Co alloy intended for dentistry. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina. 2023;:221-225.
https://hdl.handle.net/21.15107/rcub_cer_6248 .

Patarić, Aleksandra, Marković, Gordana, Đorđević, Nataša G., Mihajlović, Slavica, Mihailović, Marija, "Microstructure assessment of Co alloy intended for dentistry" in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina (2023):221-225,
https://hdl.handle.net/21.15107/rcub_cer_6248 .

TY  - CONF
AU  - Mihailović, Marija
AU  - Patarić, Aleksandra
AU  - Aksentijević, Snežana
AU  - Jordović, Branka
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6247
AB  - Even though it has been in use for a very long time, the high chromium white cast iron (HCWCI) still triggers scientists  due to its outstanding wear resistance. Besides its well-known as-cast usage, it can be used as a coating material, as well.  HCWCI owes this feature due to the presence of carbides in microstructure, which depends on the composition and heat  treatment regime. This investigation was conducted on two HCWCI alloys, where in addition to chromium, the second  important alloying element is molybdenum (Mo). Apart from other alloying elements, HCWCI_1 is alloyed with 24.48%  Cr and 1.32% Mo, while HCWCI_2 contains 14.11% Cr and 2.47% Mo. The comprehensive microstructural  characterization was carried out on as-cast samples and samples obtained after quenching (at -196oC) and/or quenching  followed by tempering (at 250oC). Important microstructure indicators are: the stability of austenite, the ratio of microconstituents (especially different types of carbides), as well as their arrangement and morphology, so they are revealed  and discussed in relation to the influencing mechanical properties.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
T1  - Microstructure development during heat treatment of high chromium white cast iron
SP  - 216
EP  - 220
UR  - https://hdl.handle.net/21.15107/rcub_cer_6247
ER  - 

@conference{
author = "Mihailović, Marija and Patarić, Aleksandra and Aksentijević, Snežana and Jordović, Branka",
year = "2023",
abstract = "Even though it has been in use for a very long time, the high chromium white cast iron (HCWCI) still triggers scientists  due to its outstanding wear resistance. Besides its well-known as-cast usage, it can be used as a coating material, as well.  HCWCI owes this feature due to the presence of carbides in microstructure, which depends on the composition and heat  treatment regime. This investigation was conducted on two HCWCI alloys, where in addition to chromium, the second  important alloying element is molybdenum (Mo). Apart from other alloying elements, HCWCI_1 is alloyed with 24.48%  Cr and 1.32% Mo, while HCWCI_2 contains 14.11% Cr and 2.47% Mo. The comprehensive microstructural  characterization was carried out on as-cast samples and samples obtained after quenching (at -196oC) and/or quenching  followed by tempering (at 250oC). Important microstructure indicators are: the stability of austenite, the ratio of microconstituents (especially different types of carbides), as well as their arrangement and morphology, so they are revealed  and discussed in relation to the influencing mechanical properties.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina",
title = "Microstructure development during heat treatment of high chromium white cast iron",
pages = "216-220",
url = "https://hdl.handle.net/21.15107/rcub_cer_6247"
}

Mihailović, M., Patarić, A., Aksentijević, S.,& Jordović, B.. (2023). Microstructure development during heat treatment of high chromium white cast iron. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 216-220.
https://hdl.handle.net/21.15107/rcub_cer_6247

Mihailović M, Patarić A, Aksentijević S, Jordović B. Microstructure development during heat treatment of high chromium white cast iron. in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina. 2023;:216-220.
https://hdl.handle.net/21.15107/rcub_cer_6247 .

Mihailović, Marija, Patarić, Aleksandra, Aksentijević, Snežana, Jordović, Branka, "Microstructure development during heat treatment of high chromium white cast iron" in Proceedings of the 5th Metallurgical and Materials Engineering Congress of South-East Europe, 7-10.06.2023, Trebinje, Bosnia and Herzegovina (2023):216-220,
https://hdl.handle.net/21.15107/rcub_cer_6247 .

TY  - JOUR
AU  - Mališić, Vanja
AU  - Pezo, Milada L.
AU  - Jelić, Aleksandra
AU  - Patarić, Aleksandra
AU  - Putić, Slaviša
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7214
AB  - Poly(methyl methacrylate) (PMMA) has a broad spectrum of uses, especially in medical applications. The role of fine-grained alumina particles of PMMA composites was investigated in this study. The composites were based on PMMA modified with dimethyl itaconate (DMI) as a matrix and alumina particles (Al2O3) and alumina doped with iron (Al2O3-Fe) modified with
3-aminopropyl-trimethoxysilane (AM) and flax oil fatty acid methyl esters (biodiesel) as reinforcements. Three particle sizes were measured (~0.4, ~0.6 and ~1.2 μm). The highest thermal conductivity values were measured for the composite 5 wt.% Al2O3-Fe-AM. With the addition of 3 wt.% Al2O3-AM to the PMMA/DMI matrix, mechanical properties were improved (tensile strength, strain, and modulus of elasticity). An artificial neural network model based on the Broyden-Fletcher-Goldfarb-Shanno iterative algorithm was investigated for prediction of thermal conductivity and mechanical properties of the composites showing satisfactory results. This is relevant for applications for optimization of dental materials to produce dentures, which were exposed to variations in temperature during the application.
AB  - Poli (metil metakrilata) (PMMA) ima široku upotrebu, posebno u stomatologiji i medicini. Kompoziti su napravljeni od PMMA modifikovanog dimetil itakonatom (DMI) kao matrice. Kao pojačanje korišćene su čestice glinice (Al2O3) i glinice dopirane oksidom gvožđa (Al2O3-Fe) modifikovanim sa 3-aminopropiltrimetoksilanom (AM) i metil estrima masnih kiselina lanenog ulja (biodizel – BD). Prema merenjima toplotne provodljivosti, najveće vrednosti toplotne provodljivosti imao je kompozit sa česticama glinice 5 wt.% Al2O3-Fe-AM. Dodatkom modifikovanih čestica glinice u PMMA/DMI matricu, poboljšane su mehaničke osobine (zatezna čvrstoća, deformacija i modul elastičnosti). Razvijen je model veštačke neuronske mreže zasnovan na iterativnom algoritmu predloženom u literaturi (Broiden-Fletcher-Goldfarb-Shanno), za predviđanje toplotne provodljivosti i mehaničkih svojstava kompozita na bazi akrilata u kombinaciji sa česticama na bazi glinice, u zavisnosti od masenog udela čestica, i dodatka oksida gvožđa i modifikatora. Pokazano je da ovi matematički modeli mogu predvideti mehanička i termička svojstva kompozitnih materijala. Ovo je posebno relevantno za predviđanje toplotne provodljivosti materijala koji se koriste u stomatologiji za izradu proteza i koji su izloženi temperaturnim promenama tokom primene.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling
T1  - Predviđanje termičkih i mehaničkih svojstava kompozita na bazi akrilata  korišćenjem modela veštačke neuronske mreže
VL  - 77
IS  - 4
SP  - 293
EP  - 302
DO  - 10.2298/HEMIND230119029M
ER  - 

@article{
author = "Mališić, Vanja and Pezo, Milada L. and Jelić, Aleksandra and Patarić, Aleksandra and Putić, Slaviša",
year = "2023",
abstract = "Poly(methyl methacrylate) (PMMA) has a broad spectrum of uses, especially in medical applications. The role of fine-grained alumina particles of PMMA composites was investigated in this study. The composites were based on PMMA modified with dimethyl itaconate (DMI) as a matrix and alumina particles (Al2O3) and alumina doped with iron (Al2O3-Fe) modified with
3-aminopropyl-trimethoxysilane (AM) and flax oil fatty acid methyl esters (biodiesel) as reinforcements. Three particle sizes were measured (~0.4, ~0.6 and ~1.2 μm). The highest thermal conductivity values were measured for the composite 5 wt.% Al2O3-Fe-AM. With the addition of 3 wt.% Al2O3-AM to the PMMA/DMI matrix, mechanical properties were improved (tensile strength, strain, and modulus of elasticity). An artificial neural network model based on the Broyden-Fletcher-Goldfarb-Shanno iterative algorithm was investigated for prediction of thermal conductivity and mechanical properties of the composites showing satisfactory results. This is relevant for applications for optimization of dental materials to produce dentures, which were exposed to variations in temperature during the application., Poli (metil metakrilata) (PMMA) ima široku upotrebu, posebno u stomatologiji i medicini. Kompoziti su napravljeni od PMMA modifikovanog dimetil itakonatom (DMI) kao matrice. Kao pojačanje korišćene su čestice glinice (Al2O3) i glinice dopirane oksidom gvožđa (Al2O3-Fe) modifikovanim sa 3-aminopropiltrimetoksilanom (AM) i metil estrima masnih kiselina lanenog ulja (biodizel – BD). Prema merenjima toplotne provodljivosti, najveće vrednosti toplotne provodljivosti imao je kompozit sa česticama glinice 5 wt.% Al2O3-Fe-AM. Dodatkom modifikovanih čestica glinice u PMMA/DMI matricu, poboljšane su mehaničke osobine (zatezna čvrstoća, deformacija i modul elastičnosti). Razvijen je model veštačke neuronske mreže zasnovan na iterativnom algoritmu predloženom u literaturi (Broiden-Fletcher-Goldfarb-Shanno), za predviđanje toplotne provodljivosti i mehaničkih svojstava kompozita na bazi akrilata u kombinaciji sa česticama na bazi glinice, u zavisnosti od masenog udela čestica, i dodatka oksida gvožđa i modifikatora. Pokazano je da ovi matematički modeli mogu predvideti mehanička i termička svojstva kompozitnih materijala. Ovo je posebno relevantno za predviđanje toplotne provodljivosti materijala koji se koriste u stomatologiji za izradu proteza i koji su izloženi temperaturnim promenama tokom primene.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling, Predviđanje termičkih i mehaničkih svojstava kompozita na bazi akrilata  korišćenjem modela veštačke neuronske mreže",
volume = "77",
number = "4",
pages = "293-302",
doi = "10.2298/HEMIND230119029M"
}

Mališić, V., Pezo, M. L., Jelić, A., Patarić, A.,& Putić, S.. (2023). Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling. in Hemijska industrija
Association of Chemical Engineers of Serbia., 77(4), 293-302.
https://doi.org/10.2298/HEMIND230119029M

Mališić V, Pezo ML, Jelić A, Patarić A, Putić S. Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling. in Hemijska industrija. 2023;77(4):293-302.
doi:10.2298/HEMIND230119029M .

Mališić, Vanja, Pezo, Milada L., Jelić, Aleksandra, Patarić, Aleksandra, Putić, Slaviša, "Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling" in Hemijska industrija, 77, no. 4 (2023):293-302,
https://doi.org/10.2298/HEMIND230119029M . .

TY  - JOUR
AU  - Mališić, Vanja
AU  - Gajić, Vuk
AU  - Porobić, Slavica
AU  - Patarić, Aleksandra
AU  - Putić, Slaviša
AU  - Vujčić, Ivica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10683
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7168
AB  - Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.
T2  - Radiation Physics and Chemistry
T1  - The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing
VL  - 207
SP  - 110846
DO  - 10.1016/j.radphyschem.2023.110846
ER  - 

@article{
author = "Mališić, Vanja and Gajić, Vuk and Porobić, Slavica and Patarić, Aleksandra and Putić, Slaviša and Vujčić, Ivica",
year = "2023",
abstract = "Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.",
journal = "Radiation Physics and Chemistry",
title = "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing",
volume = "207",
pages = "110846",
doi = "10.1016/j.radphyschem.2023.110846"
}

Mališić, V., Gajić, V., Porobić, S., Patarić, A., Putić, S.,& Vujčić, I.. (2023). The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry, 207, 110846.
https://doi.org/10.1016/j.radphyschem.2023.110846

Mališić V, Gajić V, Porobić S, Patarić A, Putić S, Vujčić I. The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry. 2023;207:110846.
doi:10.1016/j.radphyschem.2023.110846 .

Mališić, Vanja, Gajić, Vuk, Porobić, Slavica, Patarić, Aleksandra, Putić, Slaviša, Vujčić, Ivica, "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing" in Radiation Physics and Chemistry, 207 (2023):110846,
https://doi.org/10.1016/j.radphyschem.2023.110846 . .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Đorđević, Nataša G.
AU  - Jovanović, Marina N.
AU  - Vlahović, Milica
AU  - Savić, Ljubinko D.
AU  - Patarić, Aleksandra S.
AU  - Blagojev, Marina S.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4676
AB  - This work presents a grinding process of monoammonium phosphate (MAP) as an active component in a powder fire extinguisher (PFE). The aim was to determine the grinding time for reaching the optimal particle size of MAP necessary for permanent fire extinguishing. MAP grinding was performed by using a laboratory ceramic ball mill and a vibrating cup mill. The grinding process was controlled by sieving using a 100 µm sieve at precisely defined time intervals. The efficiency of a PFE depends on the share of the -100 µm fraction of the active component, which has to exceed 60 %. The optimal grain size with 64 % of fraction of particle size -100 µm was obtained after 33 min of grinding of ≈3000 µm mm grain size MAP by using a ball mill (single-stage grinding). In two-stage process, by grinding the same initial MAP sample (≈3000 µm) in the vibro mill for 10 min, powder with the upper limit grain size of 300 µm and the mean grain diameter of 120 µm was obtained. This sample with a reduced size was further ground in the ceramic ball mill yielding 67.5 % of the fraction of particle size -100 µm after 19 min. The total time of the two-stage grinding process was 29 min. By analyzing the grinding time of MAP required to get the lowest required share of the fraction of particle size -100 µm that provides the effectiveness of formed PFE it can be concluded that 64 % of this fraction was obtained after 33 min of single-stage grinding, while only after 26 min in the two-stage process. Thus, the grinding time was reduced by 7 min indicating certain energy savings. Stability and hydrophobicity of the obtained PFE were achieved by coating with magnesium stearate (MgSt) at the content of 2 % in a ball mill for 15 min. The coating was confirmed by the standardized procedure for verification of PFE hydrophobic properties in contact with water drops. To obtained PFE had component mass ratios of MAP:AS:CC:QS:MgSt=55:20:18:5:2 (AS-ammonium sulfate; CC-calcium carbonate, QS-quartz sand) and was further characterized by chemical and granulometric analyses. The fire extinguishing efficiency of the PFE was tested in controlled conditions, whereby fires were initiated by burning solid materials and flammable liquids. In both cases, immediate elimination of flames was achieved, thus proving the efficiency of the PFE obtained in this work for practical applications.
AB  - U radu je prikazan postupak mlevenja monoamonijum fosfata (MAP) kao aktivne komponente u praškastom sredstvu za gašenje požara (SGP). Cilj je bio da se utvrdi vreme mlevenja MAP koje je potrebno za dobijanje optimalne granulacije za potpuno gašenje požara i eliminisanje plamena. MAP je mleven u laboratorijskom keramičkom mlinu sa kuglama i vibro mlinu sa prstenastim radnim elementima. Proces je kontrolisan prosejavanjem na situ 100 μm. Utvrđeno je da se mlevenjem granula MAP veličine ≈3000 μm u laboratorijskom mlinu sa kuglama optimalna krupnoća od 64 % frakcije čestica veličine -100 μm dobija nakon 33 min mlevenja. Za postizanje iste finoće proizvoda u dvostepenom mlevenju vreme je skraćeno na 26 min (10 min u vibro mlinu i 16 min u mlinu sa kuglama). Stabilnost i hidrofobnost SGP je postignuta oblaganjem magnezijum stearatom (MgSt) pri udelu od 2 % u mlinu sa kuglama u trajanju od 15 min. Efikasnost gašenja je testirana na poligonu u realnim uslovima. Na tačno određenom mestu za testiranje, u kontro-lisanim uslovima, izazvan je požar paljenjem čvrstih materijala i zapaljivih tečnosti. U oba slučaja je došlo do trenutne eliminacije plamena. Na taj način je potvrđena efikasnost formiranog SGP i mogućnost njegove upotrebe u praksi.
PB  - Beograd : Savez hemijskih inženjera
T2  - Hemijska industrija
T1  - Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher
T1  - Optimizacija mlevenja aktivne komponente i hidrofobizacija dobijenog sredstva za gašenje požara]
VL  - 75
IS  - 2
SP  - 65
EP  - 75
DO  - 10.2298/HEMIND210114012M
ER  - 

@article{
author = "Mihajlović, Slavica and Đorđević, Nataša G. and Jovanović, Marina N. and Vlahović, Milica and Savić, Ljubinko D. and Patarić, Aleksandra S. and Blagojev, Marina S.",
year = "2021",
abstract = "This work presents a grinding process of monoammonium phosphate (MAP) as an active component in a powder fire extinguisher (PFE). The aim was to determine the grinding time for reaching the optimal particle size of MAP necessary for permanent fire extinguishing. MAP grinding was performed by using a laboratory ceramic ball mill and a vibrating cup mill. The grinding process was controlled by sieving using a 100 µm sieve at precisely defined time intervals. The efficiency of a PFE depends on the share of the -100 µm fraction of the active component, which has to exceed 60 %. The optimal grain size with 64 % of fraction of particle size -100 µm was obtained after 33 min of grinding of ≈3000 µm mm grain size MAP by using a ball mill (single-stage grinding). In two-stage process, by grinding the same initial MAP sample (≈3000 µm) in the vibro mill for 10 min, powder with the upper limit grain size of 300 µm and the mean grain diameter of 120 µm was obtained. This sample with a reduced size was further ground in the ceramic ball mill yielding 67.5 % of the fraction of particle size -100 µm after 19 min. The total time of the two-stage grinding process was 29 min. By analyzing the grinding time of MAP required to get the lowest required share of the fraction of particle size -100 µm that provides the effectiveness of formed PFE it can be concluded that 64 % of this fraction was obtained after 33 min of single-stage grinding, while only after 26 min in the two-stage process. Thus, the grinding time was reduced by 7 min indicating certain energy savings. Stability and hydrophobicity of the obtained PFE were achieved by coating with magnesium stearate (MgSt) at the content of 2 % in a ball mill for 15 min. The coating was confirmed by the standardized procedure for verification of PFE hydrophobic properties in contact with water drops. To obtained PFE had component mass ratios of MAP:AS:CC:QS:MgSt=55:20:18:5:2 (AS-ammonium sulfate; CC-calcium carbonate, QS-quartz sand) and was further characterized by chemical and granulometric analyses. The fire extinguishing efficiency of the PFE was tested in controlled conditions, whereby fires were initiated by burning solid materials and flammable liquids. In both cases, immediate elimination of flames was achieved, thus proving the efficiency of the PFE obtained in this work for practical applications., U radu je prikazan postupak mlevenja monoamonijum fosfata (MAP) kao aktivne komponente u praškastom sredstvu za gašenje požara (SGP). Cilj je bio da se utvrdi vreme mlevenja MAP koje je potrebno za dobijanje optimalne granulacije za potpuno gašenje požara i eliminisanje plamena. MAP je mleven u laboratorijskom keramičkom mlinu sa kuglama i vibro mlinu sa prstenastim radnim elementima. Proces je kontrolisan prosejavanjem na situ 100 μm. Utvrđeno je da se mlevenjem granula MAP veličine ≈3000 μm u laboratorijskom mlinu sa kuglama optimalna krupnoća od 64 % frakcije čestica veličine -100 μm dobija nakon 33 min mlevenja. Za postizanje iste finoće proizvoda u dvostepenom mlevenju vreme je skraćeno na 26 min (10 min u vibro mlinu i 16 min u mlinu sa kuglama). Stabilnost i hidrofobnost SGP je postignuta oblaganjem magnezijum stearatom (MgSt) pri udelu od 2 % u mlinu sa kuglama u trajanju od 15 min. Efikasnost gašenja je testirana na poligonu u realnim uslovima. Na tačno određenom mestu za testiranje, u kontro-lisanim uslovima, izazvan je požar paljenjem čvrstih materijala i zapaljivih tečnosti. U oba slučaja je došlo do trenutne eliminacije plamena. Na taj način je potvrđena efikasnost formiranog SGP i mogućnost njegove upotrebe u praksi.",
publisher = "Beograd : Savez hemijskih inženjera",
journal = "Hemijska industrija",
title = "Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher, Optimizacija mlevenja aktivne komponente i hidrofobizacija dobijenog sredstva za gašenje požara]",
volume = "75",
number = "2",
pages = "65-75",
doi = "10.2298/HEMIND210114012M"
}

Mihajlović, S., Đorđević, N. G., Jovanović, M. N., Vlahović, M., Savić, L. D., Patarić, A. S.,& Blagojev, M. S.. (2021). Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher. in Hemijska industrija
Beograd : Savez hemijskih inženjera., 75(2), 65-75.
https://doi.org/10.2298/HEMIND210114012M

Mihajlović S, Đorđević NG, Jovanović MN, Vlahović M, Savić LD, Patarić AS, Blagojev MS. Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher. in Hemijska industrija. 2021;75(2):65-75.
doi:10.2298/HEMIND210114012M .

Mihajlović, Slavica, Đorđević, Nataša G., Jovanović, Marina N., Vlahović, Milica, Savić, Ljubinko D., Patarić, Aleksandra S., Blagojev, Marina S., "Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher" in Hemijska industrija, 75, no. 2 (2021):65-75,
https://doi.org/10.2298/HEMIND210114012M . .

TY  - GEN
AU  - Mihailović, Marija
AU  - Jegdić, Bore
AU  - Jugović, Branimir
AU  - Kovačina, Jovanka
AU  - Radojković, Bojana
AU  - Patarić, Aleksandra
AU  - Jokić, Bojan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4864
AB  - Praćenje pojave i brzine korozije, nastanak termičkih oksida na površini metalnih delova eletroenergetskog postrojenјa, kao i način njihovog otklanjanja na način koji je tehnološki pogodan, ekonomski pristupačan i ekološki opravdan prikazan je u ovom tehničkom rešenju Ispitivanjem je ustanovljeno da su metalni delovi na kojima se javlja korozija izrađeni od na nerđajućeg čelika AISI 304, pa je pojava korozije i termičkih oksida praćena je u odnosu na to, kao i sastav prašine sa kojom su metalni delovi u kontaktu. Pojava termičkih oksida na površini nerđajućih čelika posledica je povišene temperature na mestu zavarivanja metalnih delova.Merena je vrednost pH oba rastvora: etalonskog i zasićenog rastvoru prašine iz pogona.Sastav uzoraka prašine određen je FTIR metodom, pa su na osnovu prisutnih jona u rastvoru definisana ostala ispitivanja.Određivan je korozioni potencijal Ekor, vrednost otpora polarizacije Rp, kao i gustina struje korozije jkor. Sva ispitivanja nerđajućeg čelika u etalonskom rastvoru i u zasićenom rastvoru prašine iz pogona firme naručioca, rađena su za 1 sat i u toku 25 dana.Kao rezultat svih istražoivanja, date su tehnološke preporuke i način otklanjanja korozije i termičkih oksida.Rešenje je prodato naručuicu u toku 2020.godine, a od januara 2021.godine primenjeno u postrojenju naručioca, ELNOS BL d.o.o., koji su izjavom potvrdili primenu ovog tehničkog rešenja u svom poslovanju.
AB  - Monitoring the occurrence and rate of corrosion, the formation of thermal oxides on the surface of metal parts of the power plant, as well as the method of their elimination in a way that is technologically suitable, economically affordable and environmentally justified is shown in this technical solution. It has been established that the metal elements affected by corrosion were made from stainless steel AISI 304. Accordingly, the occurrence of corrosion and thermal oxides was monitored based on the material and the composition of the dust with which the metal parts are in contact. The emergence of thermal oxides on the surface of stainless steels is a consequence of the elevated temperature at the welding site.The pH value of both solutions was measured: standard and saturated solution of dust from the plant. The composition of the dust samples was determined by FTIR. The other tests were defined based on the ions present in the solution.The corrosion potential, the value of the polarization resistance, as well as the corrosion current density were determined. All tests of stainless steel in the standard solution and in the saturated solution of dust were performed for one hour within a span of 25 days.Technological recommendations on how to eliminate corrosion and thermal oxides are provided.The solution has been applied since January 2021 by ELNOS BL d.o.o.
PB  - Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy
T1  - Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja
T1  - Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant
UR  - https://hdl.handle.net/21.15107/rcub_dais_11630
ER  - 

@misc{
author = "Mihailović, Marija and Jegdić, Bore and Jugović, Branimir and Kovačina, Jovanka and Radojković, Bojana and Patarić, Aleksandra and Jokić, Bojan",
year = "2021",
abstract = "Praćenje pojave i brzine korozije, nastanak termičkih oksida na površini metalnih delova eletroenergetskog postrojenјa, kao i način njihovog otklanjanja na način koji je tehnološki pogodan, ekonomski pristupačan i ekološki opravdan prikazan je u ovom tehničkom rešenju Ispitivanjem je ustanovljeno da su metalni delovi na kojima se javlja korozija izrađeni od na nerđajućeg čelika AISI 304, pa je pojava korozije i termičkih oksida praćena je u odnosu na to, kao i sastav prašine sa kojom su metalni delovi u kontaktu. Pojava termičkih oksida na površini nerđajućih čelika posledica je povišene temperature na mestu zavarivanja metalnih delova.Merena je vrednost pH oba rastvora: etalonskog i zasićenog rastvoru prašine iz pogona.Sastav uzoraka prašine određen je FTIR metodom, pa su na osnovu prisutnih jona u rastvoru definisana ostala ispitivanja.Određivan je korozioni potencijal Ekor, vrednost otpora polarizacije Rp, kao i gustina struje korozije jkor. Sva ispitivanja nerđajućeg čelika u etalonskom rastvoru i u zasićenom rastvoru prašine iz pogona firme naručioca, rađena su za 1 sat i u toku 25 dana.Kao rezultat svih istražoivanja, date su tehnološke preporuke i način otklanjanja korozije i termičkih oksida.Rešenje je prodato naručuicu u toku 2020.godine, a od januara 2021.godine primenjeno u postrojenju naručioca, ELNOS BL d.o.o., koji su izjavom potvrdili primenu ovog tehničkog rešenja u svom poslovanju., Monitoring the occurrence and rate of corrosion, the formation of thermal oxides on the surface of metal parts of the power plant, as well as the method of their elimination in a way that is technologically suitable, economically affordable and environmentally justified is shown in this technical solution. It has been established that the metal elements affected by corrosion were made from stainless steel AISI 304. Accordingly, the occurrence of corrosion and thermal oxides was monitored based on the material and the composition of the dust with which the metal parts are in contact. The emergence of thermal oxides on the surface of stainless steels is a consequence of the elevated temperature at the welding site.The pH value of both solutions was measured: standard and saturated solution of dust from the plant. The composition of the dust samples was determined by FTIR. The other tests were defined based on the ions present in the solution.The corrosion potential, the value of the polarization resistance, as well as the corrosion current density were determined. All tests of stainless steel in the standard solution and in the saturated solution of dust were performed for one hour within a span of 25 days.Technological recommendations on how to eliminate corrosion and thermal oxides are provided.The solution has been applied since January 2021 by ELNOS BL d.o.o.",
publisher = "Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy",
title = "Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja, Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant",
url = "https://hdl.handle.net/21.15107/rcub_dais_11630"
}

Mihailović, M., Jegdić, B., Jugović, B., Kovačina, J., Radojković, B., Patarić, A.,& Jokić, B.. (2021). Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja. 
Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
https://hdl.handle.net/21.15107/rcub_dais_11630

Mihailović M, Jegdić B, Jugović B, Kovačina J, Radojković B, Patarić A, Jokić B. Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja. 2021;.
https://hdl.handle.net/21.15107/rcub_dais_11630 .

Mihailović, Marija, Jegdić, Bore, Jugović, Branimir, Kovačina, Jovanka, Radojković, Bojana, Patarić, Aleksandra, Jokić, Bojan, "Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja" (2021),
https://hdl.handle.net/21.15107/rcub_dais_11630 .

TY  - JOUR
AU  - Patarić, Aleksandra
AU  - Mihailović, Marija
AU  - Marković, Branislav
AU  - Sokić, Miroslav
AU  - Radovanović, Andreja
AU  - Jordović, Branka
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4803
AB  - Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA).
AB  - Određivanje i analiza mikrostrukture su presudni tokom dizajniranja i prilikom dobijanja legura aluminijuma visokog kvaliteta u livenom stanju. Pored neizbežne povezanosti homogenije mikrostrukture i boljih mehaničkih svojstava, bolji kvalitet u livenom stanju ukazuje i na veću efikasnost procesa proizvodnje legura aluminijuma. Tokom procesa očvršćavanja legure aluminijuma mogu se pojaviti mnogi mikro-strukturni nedostaci koji pogoršavaju mehanička svojstva, a samim tim i upotrebljivost takvog odlivka. Delovanje elektromagnetnog polja tokom procesa vertikalnog kontinualnog livenja značajno smanjuje pojavu ovih grešaka. Ovde prikazani rezultati dobijeni ispitivanjem mikrostrukture, električne provodljivosti i promene faznog sastava uzoraka legure EN AV 7075, odlivene u prisustvu elektromagnetnog polja, kao i bez njega, jasno pokazuju da je moguće smanjiti ili izbeći nedostatke livenja pri-menom elektromagnetnog polja. To je pokazano pomoću određivanja i analize mikro-strukture, ispitivanja električne provodljivosti i diferencijalne termičke analize (DTA).
PB  - Belgrade : Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process
T1  - Mikrostruktura kao bitan aspekt kvaliteta legure aluminijuma EN AW 7075 dobijene kontinuiranim procesom livenja pod uticajem elektromagnetnog polja
VL  - 75
IS  - 1
SP  - 31
EP  - 37
DO  - 10.2298/HEMIND201214006P
ER  - 

@article{
author = "Patarić, Aleksandra and Mihailović, Marija and Marković, Branislav and Sokić, Miroslav and Radovanović, Andreja and Jordović, Branka",
year = "2021",
abstract = "Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA)., Određivanje i analiza mikrostrukture su presudni tokom dizajniranja i prilikom dobijanja legura aluminijuma visokog kvaliteta u livenom stanju. Pored neizbežne povezanosti homogenije mikrostrukture i boljih mehaničkih svojstava, bolji kvalitet u livenom stanju ukazuje i na veću efikasnost procesa proizvodnje legura aluminijuma. Tokom procesa očvršćavanja legure aluminijuma mogu se pojaviti mnogi mikro-strukturni nedostaci koji pogoršavaju mehanička svojstva, a samim tim i upotrebljivost takvog odlivka. Delovanje elektromagnetnog polja tokom procesa vertikalnog kontinualnog livenja značajno smanjuje pojavu ovih grešaka. Ovde prikazani rezultati dobijeni ispitivanjem mikrostrukture, električne provodljivosti i promene faznog sastava uzoraka legure EN AV 7075, odlivene u prisustvu elektromagnetnog polja, kao i bez njega, jasno pokazuju da je moguće smanjiti ili izbeći nedostatke livenja pri-menom elektromagnetnog polja. To je pokazano pomoću određivanja i analize mikro-strukture, ispitivanja električne provodljivosti i diferencijalne termičke analize (DTA).",
publisher = "Belgrade : Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process, Mikrostruktura kao bitan aspekt kvaliteta legure aluminijuma EN AW 7075 dobijene kontinuiranim procesom livenja pod uticajem elektromagnetnog polja",
volume = "75",
number = "1",
pages = "31-37",
doi = "10.2298/HEMIND201214006P"
}

Patarić, A., Mihailović, M., Marković, B., Sokić, M., Radovanović, A.,& Jordović, B.. (2021). Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process. in Hemijska industrija
Belgrade : Association of the Chemical Engineers of Serbia., 75(1), 31-37.
https://doi.org/10.2298/HEMIND201214006P

Patarić A, Mihailović M, Marković B, Sokić M, Radovanović A, Jordović B. Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process. in Hemijska industrija. 2021;75(1):31-37.
doi:10.2298/HEMIND201214006P .

Patarić, Aleksandra, Mihailović, Marija, Marković, Branislav, Sokić, Miroslav, Radovanović, Andreja, Jordović, Branka, "Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process" in Hemijska industrija, 75, no. 1 (2021):31-37,
https://doi.org/10.2298/HEMIND201214006P . .

TY  - PAT
AU  - Đorđević, Nataša G.
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Patarić, Aleksandra
AU  - Marković, Branislav
PY  - 2020
UR  - http://www.zis.gov.rs/informacione-usluge.48.html
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3780
AB  - Problem zagađenja životne sredine odnosi se na vazduh, vodu i zemljište. Emisija CO2 u atmosferu smatra se glavnim uzrokom efekta staklene bašte i globalnog zagrevanja. Ovaj pronalazak se odnsoi na primenu mehanohemijski aktiviranog natrijum karbonata
na zaštitu životne sredine, a zahvaljujući značajnom povećanjem apsopcionih i hemisorpcionih svojstava natrijum karbonata do kojih dolazi usled aktivacije uzorka. Mehanohemijskom aktivacijom natrijum karbonata i njegovom primenom pokazano je da se masa polaznog uzorka poveća i do 30% u atmosferi vazduha pri sobnim uslovima u toku vremena. Ovako aktiviran natrijum karbonat kome su značajno povećana apsorpciona svojstva je moguće primeniti i na
postojećim aparaturama koje inače koriste natrijum karbonat u cilju apsorpcije CO2, radi zaštite životne sredine, čime bi se i njihova efektivnost značajno povećala.
AB  - Environmental pollution is a serious problem that affects air, water and soil. Emission of CO2 into the atmosphere is considered to be a major cause of the greenhouse effect and global warming. The present invention relates to the application of mechanochemically activated sodium carbonate to the environment, owing to the significant increase in the absorption and chemisorption properties of sodium carbonate due to activation. Using activated sodium carbonate, it was shown that the mass of the starting sample increase up to 30% at room conditions and temperature over time. Sodium carbonate activated in mechanochemical activator, has significantly increased absorption properties, and also can be applied to existing appliances that otherwise use sodium carbonate for the purpose of CO2 absorption, for environmental protection, which would also increase their effectiveness.
PB  - Zavod za intelektualnu svojinu Republike Srbije
T2  - Glasnik intulektualne svojine
T1  - Primena mehanohemijski aktiviranog natrijum karbonata kao apsorpcionog sredstva CO2 u zaštiti životne sredine
T1  - Application Of Mechanochemically Activated Sodium Carbonate As A Co2 Absorbent In Environmental Protection
VL  - 8
SP  - 10
EP  - 11
UR  - https://hdl.handle.net/21.15107/rcub_cer_3780
ER  - 

@misc{
author = "Đorđević, Nataša G. and Mihajlović, Slavica and Martinović, Sanja and Vlahović, Milica and Patarić, Aleksandra and Marković, Branislav",
year = "2020",
abstract = "Problem zagađenja životne sredine odnosi se na vazduh, vodu i zemljište. Emisija CO2 u atmosferu smatra se glavnim uzrokom efekta staklene bašte i globalnog zagrevanja. Ovaj pronalazak se odnsoi na primenu mehanohemijski aktiviranog natrijum karbonata
na zaštitu životne sredine, a zahvaljujući značajnom povećanjem apsopcionih i hemisorpcionih svojstava natrijum karbonata do kojih dolazi usled aktivacije uzorka. Mehanohemijskom aktivacijom natrijum karbonata i njegovom primenom pokazano je da se masa polaznog uzorka poveća i do 30% u atmosferi vazduha pri sobnim uslovima u toku vremena. Ovako aktiviran natrijum karbonat kome su značajno povećana apsorpciona svojstva je moguće primeniti i na
postojećim aparaturama koje inače koriste natrijum karbonat u cilju apsorpcije CO2, radi zaštite životne sredine, čime bi se i njihova efektivnost značajno povećala., Environmental pollution is a serious problem that affects air, water and soil. Emission of CO2 into the atmosphere is considered to be a major cause of the greenhouse effect and global warming. The present invention relates to the application of mechanochemically activated sodium carbonate to the environment, owing to the significant increase in the absorption and chemisorption properties of sodium carbonate due to activation. Using activated sodium carbonate, it was shown that the mass of the starting sample increase up to 30% at room conditions and temperature over time. Sodium carbonate activated in mechanochemical activator, has significantly increased absorption properties, and also can be applied to existing appliances that otherwise use sodium carbonate for the purpose of CO2 absorption, for environmental protection, which would also increase their effectiveness.",
publisher = "Zavod za intelektualnu svojinu Republike Srbije",
journal = "Glasnik intulektualne svojine",
title = "Primena mehanohemijski aktiviranog natrijum karbonata kao apsorpcionog sredstva CO2 u zaštiti životne sredine, Application Of Mechanochemically Activated Sodium Carbonate As A Co2 Absorbent In Environmental Protection",
volume = "8",
pages = "10-11",
url = "https://hdl.handle.net/21.15107/rcub_cer_3780"
}

Đorđević, N. G., Mihajlović, S., Martinović, S., Vlahović, M., Patarić, A.,& Marković, B.. (2020). Primena mehanohemijski aktiviranog natrijum karbonata kao apsorpcionog sredstva CO2 u zaštiti životne sredine. in Glasnik intulektualne svojine
Zavod za intelektualnu svojinu Republike Srbije., 8, 10-11.
https://hdl.handle.net/21.15107/rcub_cer_3780

Đorđević NG, Mihajlović S, Martinović S, Vlahović M, Patarić A, Marković B. Primena mehanohemijski aktiviranog natrijum karbonata kao apsorpcionog sredstva CO2 u zaštiti životne sredine. in Glasnik intulektualne svojine. 2020;8:10-11.
https://hdl.handle.net/21.15107/rcub_cer_3780 .

Đorđević, Nataša G., Mihajlović, Slavica, Martinović, Sanja, Vlahović, Milica, Patarić, Aleksandra, Marković, Branislav, "Primena mehanohemijski aktiviranog natrijum karbonata kao apsorpcionog sredstva CO2 u zaštiti životne sredine" in Glasnik intulektualne svojine, 8 (2020):10-11,
https://hdl.handle.net/21.15107/rcub_cer_3780 .

TY  - JOUR
AU  - Mihailović, Marija
AU  - Patarić, Aleksandra
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3696
AB  - The investigation here is aimed to examine the structural and mechanical changes that might have occurred during the hot forging process, a process to obtain a surgical hip implant, and the subsequent heat treatment. Microstructural characterization, morphological and semi-quantitative chemical analyses have been accomplished using an optical and scanning electron microscope. Chemical analyses of all surfaces obtained by the dotted method in all analyzed samples have shown the approximate equal content of aluminum, titanium, vanadium, iron, and silicon. Tensile testing and measurements were following obtained microstructure, showing the uniformity of microstructure and properties along the forging part, as well as over its cross section. All tests proved that hot forging could be a suitable procedure for surgical implants processing.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - On the properties of hot forged Ti-6Al-4V alloy aimed for surgical implants
VL  - 25
IS  - 1
SP  - 23
EP  - 29
DO  - 10.30544/412
ER  - 

@article{
author = "Mihailović, Marija and Patarić, Aleksandra",
year = "2019",
abstract = "The investigation here is aimed to examine the structural and mechanical changes that might have occurred during the hot forging process, a process to obtain a surgical hip implant, and the subsequent heat treatment. Microstructural characterization, morphological and semi-quantitative chemical analyses have been accomplished using an optical and scanning electron microscope. Chemical analyses of all surfaces obtained by the dotted method in all analyzed samples have shown the approximate equal content of aluminum, titanium, vanadium, iron, and silicon. Tensile testing and measurements were following obtained microstructure, showing the uniformity of microstructure and properties along the forging part, as well as over its cross section. All tests proved that hot forging could be a suitable procedure for surgical implants processing.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "On the properties of hot forged Ti-6Al-4V alloy aimed for surgical implants",
volume = "25",
number = "1",
pages = "23-29",
doi = "10.30544/412"
}

Mihailović, M.,& Patarić, A.. (2019). On the properties of hot forged Ti-6Al-4V alloy aimed for surgical implants. in Metallurgical & Materials Engineering
Belgrade : Association of Metallurgical Engineers of Serbia., 25(1), 23-29.
https://doi.org/10.30544/412

Mihailović M, Patarić A. On the properties of hot forged Ti-6Al-4V alloy aimed for surgical implants. in Metallurgical & Materials Engineering. 2019;25(1):23-29.
doi:10.30544/412 .

Mihailović, Marija, Patarić, Aleksandra, "On the properties of hot forged Ti-6Al-4V alloy aimed for surgical implants" in Metallurgical & Materials Engineering, 25, no. 1 (2019):23-29,
https://doi.org/10.30544/412 . .

TY  - JOUR
AU  - Karastojković, Zoran M.
AU  - Polić, Suzana R.
AU  - Čubrilović, Slobodan B.
AU  - Jovanović, Danijela N.
AU  - Janjušević, Zoran V.
AU  - Patarić, Aleksandra S.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6101
AB  - Making of an artistic piece usually includes a number of different technologies. It implies that for understanding of eventually present irregularities one should knows a lot of technical details. Brazing technology is one of them, inspection of integrity, also. Brazing technology generally has evolved on empirical manner, mainly by trial and error(s). The basic difficulty in this technology is
that the real situation is highly complex due to the presence of large number of variables, some of them may not be easy to recognize. The great problem is the appearance of crack(s) in postcleaning periode, i.e after brazing is finished, it means over years or decades. A good braze joint must be both physically and chemically bounded. One of the available method for investigation is radiographic testing, when the thickness of testing components commonly does not represents a problem. Here provided radiographic testing has
revealed the existence of some indications only at leaves. The indications usualy mean discontinuity in material homogenity. Penetrant testing is a next step for investigation of surface. Registration of indications and their locations are necessary steps in any further approach for removing such discontinuities. Choosing the repair method always is particular problem, however
in entire technique, especially on sensitive artistic component(s). Every action in repairing or restauration may led to more or less visible traces. Unadequate actions may permanently change the appearance or usage of treated artefact. Here is shown one irregularity (crack) at one brazed leaf from an artistic desk lamp.
AB  - Izrada jednog umetničkog dela obično uključuje brojne različite tehnologije. To podrazumeva da je za
razumevanje eventualno prisutnih nepravilnosti potrebno znati puno tehničkih detalja. Tehnologija
lemljenja je jedna od njih, ispitivanje integriteta, takođe. Tehnologija lemljenja, uopšte, se razvijala na
empirijski način, uglavnom pokušajima i greškama. Osnovnu teškoću čini realna situacija, koja je veoma
složena, usled prisustva velikog broja uticajnih veličina, neke od njih se ne mogu lako prepoznati. Veliki
problem je pojava pukotina u periodu posle čišćenja, tj. po završetku lemljenja, a to znači nekada posle
više godina ili decenija. Dobar zalemljeni spoj mora biti valjano fizički i hemijski spojen.
Jedna od primenljivih metoda ispitivanja je radiografsko ispitivanje, kada debljina ispitivanih delova
obično ne predstavlja problem. Ovde izvedena radiografska ispitivanja su nagovestila prisustvo
nekih indikacija samo na listovima. Penetranstsko ispitivanje je sledeći korak za ispitivanje
površine. Registrovanje indikacija i njihovo lociranje su neophodni koraci u svakom daljem
pristupu u cilju uklanjanja takvih diskontinuiteta. Izbor metode reparacije uvek je poseban problem,
dakako u celoj tehnici, a posebno na osetljivim umetničkim predmetima. Svako delovanje u
reparaciji ili restauraciji može dovesti do manje ili više vidljivih tragova. Neodgovarajuća delovanja
mogu dovesti do manje ili više vidljivih tragova. Ovde je pokazana jedna nepravilnost (pukotina)
na zalemljenom listu, na jednoj umetničkoj stonoj lampi.
PB  - Engineering Society for Corrosion
T2  - Zaštita Materijala
T1  - Corrodive cracks from flux residuals after brazing of thin leaves at an artistic desk lamp
T1  - Korozione pukotine od zaostalog topitelja posle lemljenja tankih listova na jednoj umetničkoj stonoj lampi
VL  - 59
IS  - 3
SP  - 454
EP  - 458
DO  - 10.5937/ZasMat1803454K
ER  - 

@article{
author = "Karastojković, Zoran M. and Polić, Suzana R. and Čubrilović, Slobodan B. and Jovanović, Danijela N. and Janjušević, Zoran V. and Patarić, Aleksandra S.",
year = "2018",
abstract = "Making of an artistic piece usually includes a number of different technologies. It implies that for understanding of eventually present irregularities one should knows a lot of technical details. Brazing technology is one of them, inspection of integrity, also. Brazing technology generally has evolved on empirical manner, mainly by trial and error(s). The basic difficulty in this technology is
that the real situation is highly complex due to the presence of large number of variables, some of them may not be easy to recognize. The great problem is the appearance of crack(s) in postcleaning periode, i.e after brazing is finished, it means over years or decades. A good braze joint must be both physically and chemically bounded. One of the available method for investigation is radiographic testing, when the thickness of testing components commonly does not represents a problem. Here provided radiographic testing has
revealed the existence of some indications only at leaves. The indications usualy mean discontinuity in material homogenity. Penetrant testing is a next step for investigation of surface. Registration of indications and their locations are necessary steps in any further approach for removing such discontinuities. Choosing the repair method always is particular problem, however
in entire technique, especially on sensitive artistic component(s). Every action in repairing or restauration may led to more or less visible traces. Unadequate actions may permanently change the appearance or usage of treated artefact. Here is shown one irregularity (crack) at one brazed leaf from an artistic desk lamp., Izrada jednog umetničkog dela obično uključuje brojne različite tehnologije. To podrazumeva da je za
razumevanje eventualno prisutnih nepravilnosti potrebno znati puno tehničkih detalja. Tehnologija
lemljenja je jedna od njih, ispitivanje integriteta, takođe. Tehnologija lemljenja, uopšte, se razvijala na
empirijski način, uglavnom pokušajima i greškama. Osnovnu teškoću čini realna situacija, koja je veoma
složena, usled prisustva velikog broja uticajnih veličina, neke od njih se ne mogu lako prepoznati. Veliki
problem je pojava pukotina u periodu posle čišćenja, tj. po završetku lemljenja, a to znači nekada posle
više godina ili decenija. Dobar zalemljeni spoj mora biti valjano fizički i hemijski spojen.
Jedna od primenljivih metoda ispitivanja je radiografsko ispitivanje, kada debljina ispitivanih delova
obično ne predstavlja problem. Ovde izvedena radiografska ispitivanja su nagovestila prisustvo
nekih indikacija samo na listovima. Penetranstsko ispitivanje je sledeći korak za ispitivanje
površine. Registrovanje indikacija i njihovo lociranje su neophodni koraci u svakom daljem
pristupu u cilju uklanjanja takvih diskontinuiteta. Izbor metode reparacije uvek je poseban problem,
dakako u celoj tehnici, a posebno na osetljivim umetničkim predmetima. Svako delovanje u
reparaciji ili restauraciji može dovesti do manje ili više vidljivih tragova. Neodgovarajuća delovanja
mogu dovesti do manje ili više vidljivih tragova. Ovde je pokazana jedna nepravilnost (pukotina)
na zalemljenom listu, na jednoj umetničkoj stonoj lampi.",
publisher = "Engineering Society for Corrosion",
journal = "Zaštita Materijala",
title = "Corrodive cracks from flux residuals after brazing of thin leaves at an artistic desk lamp, Korozione pukotine od zaostalog topitelja posle lemljenja tankih listova na jednoj umetničkoj stonoj lampi",
volume = "59",
number = "3",
pages = "454-458",
doi = "10.5937/ZasMat1803454K"
}

Karastojković, Z. M., Polić, S. R., Čubrilović, S. B., Jovanović, D. N., Janjušević, Z. V.,& Patarić, A. S.. (2018). Corrodive cracks from flux residuals after brazing of thin leaves at an artistic desk lamp. in Zaštita Materijala
Engineering Society for Corrosion., 59(3), 454-458.
https://doi.org/10.5937/ZasMat1803454K

Karastojković ZM, Polić SR, Čubrilović SB, Jovanović DN, Janjušević ZV, Patarić AS. Corrodive cracks from flux residuals after brazing of thin leaves at an artistic desk lamp. in Zaštita Materijala. 2018;59(3):454-458.
doi:10.5937/ZasMat1803454K .

Karastojković, Zoran M., Polić, Suzana R., Čubrilović, Slobodan B., Jovanović, Danijela N., Janjušević, Zoran V., Patarić, Aleksandra S., "Corrodive cracks from flux residuals after brazing of thin leaves at an artistic desk lamp" in Zaštita Materijala, 59, no. 3 (2018):454-458,
https://doi.org/10.5937/ZasMat1803454K . .

TY  - JOUR
AU  - Marković, Branislav
AU  - Manasijević, Dragan
AU  - Talijan, Nadežda M.
AU  - Sokić, Miroslav
AU  - Štrbac, Nada
AU  - Patarić, Aleksandra
AU  - Bugarčić, Mladen
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3884
AB  - The Bi–Cu–Ni ternary system belongs to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. The paper shows results of the thermodynamic calculations using general solution model along the line with the molar ratio of Cu: Ni = 1:1. The experimental part shows thermal, structural, electrical and mechanical properties based on differential scanning calorimetry (DSC), scanning electron microscopy with energy dispersive spectrometry (SEM-EDS), electroconductivity and hardness measurements of the alloys selected in the section from bismuth corner with molar ratio Cu: Ni = 1:1, Cu: Ni = 3:1, and Cu: Ni = 1:3.
PB  - Serbia : Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties
VL  - 23
IS  - 3
SP  - 241
EP  - 254
DO  - 10.30544/316
ER  - 

@article{
author = "Marković, Branislav and Manasijević, Dragan and Talijan, Nadežda M. and Sokić, Miroslav and Štrbac, Nada and Patarić, Aleksandra and Bugarčić, Mladen",
year = "2017",
abstract = "The Bi–Cu–Ni ternary system belongs to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. The paper shows results of the thermodynamic calculations using general solution model along the line with the molar ratio of Cu: Ni = 1:1. The experimental part shows thermal, structural, electrical and mechanical properties based on differential scanning calorimetry (DSC), scanning electron microscopy with energy dispersive spectrometry (SEM-EDS), electroconductivity and hardness measurements of the alloys selected in the section from bismuth corner with molar ratio Cu: Ni = 1:1, Cu: Ni = 3:1, and Cu: Ni = 1:3.",
publisher = "Serbia : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties",
volume = "23",
number = "3",
pages = "241-254",
doi = "10.30544/316"
}

Marković, B., Manasijević, D., Talijan, N. M., Sokić, M., Štrbac, N., Patarić, A.,& Bugarčić, M.. (2017). Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties. in Metallurgical & Materials Engineering
Serbia : Association of Metallurgical Engineers of Serbia., 23(3), 241-254.
https://doi.org/10.30544/316

Marković B, Manasijević D, Talijan NM, Sokić M, Štrbac N, Patarić A, Bugarčić M. Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties. in Metallurgical & Materials Engineering. 2017;23(3):241-254.
doi:10.30544/316 .

Marković, Branislav, Manasijević, Dragan, Talijan, Nadežda M., Sokić, Miroslav, Štrbac, Nada, Patarić, Aleksandra, Bugarčić, Mladen, "Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties" in Metallurgical & Materials Engineering, 23, no. 3 (2017):241-254,
https://doi.org/10.30544/316 . .