TY  - JOUR
AU  - Pavlović, Miroslav M.
AU  - Pantović, Radoje V.
AU  - Janković, Zoran
AU  - Nedeljković, Dragan
AU  - Nikolić, Nebojša D.
AU  - Pavlović, Miomir
AU  - Stevanović, Jasmina
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4018
AB  - This manuscript presents the results of investigating the properties of composite materials having poly(lactide-co-glycolide) (PLGA) matrix filled with electrolytically produced copper powder whose particles have a highly developed branched structure. The volume fraction of the copper powder used as a filler for the preparation of the composite was varied from 0.4 to 7.2 vol. %. The samples were prepared at 140 °C by hot molding injection. The effect of the morphology of electrolytically obtained copper powder on the appearance of the percolation threshold and on the conductivity of the composites was studied. Characterization included impedance spectroscopy (IS) measurement of electric conductivity and scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier-transform Infrared Spectroscopy (FTIR) morphological analysis. Electric conductive pathways were formed throughout the entire volume of the composites, where their formation was purely stochastic in all the dimensions. The percolation threshold was 2.72 vol.%, which is significantly lower than the one stated in the literature for similar composites, since these kind of composites are investigated for the first time. This property can be attributed to the use of a filler of different, diverse morphologies.
PB  - ESG
T2  - International Journal of Electrochemical Science
T1  - Electric Conductivity of Electrolytic Copper Powder Filled Poly(Lactide-co-Glycolide) Composites
SP  - 9825
EP  - 9837
DO  - 10.20964/2019.10.02
ER  - 

@article{
author = "Pavlović, Miroslav M. and Pantović, Radoje V. and Janković, Zoran and Nedeljković, Dragan and Nikolić, Nebojša D. and Pavlović, Miomir and Stevanović, Jasmina",
year = "2019",
abstract = "This manuscript presents the results of investigating the properties of composite materials having poly(lactide-co-glycolide) (PLGA) matrix filled with electrolytically produced copper powder whose particles have a highly developed branched structure. The volume fraction of the copper powder used as a filler for the preparation of the composite was varied from 0.4 to 7.2 vol. %. The samples were prepared at 140 °C by hot molding injection. The effect of the morphology of electrolytically obtained copper powder on the appearance of the percolation threshold and on the conductivity of the composites was studied. Characterization included impedance spectroscopy (IS) measurement of electric conductivity and scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier-transform Infrared Spectroscopy (FTIR) morphological analysis. Electric conductive pathways were formed throughout the entire volume of the composites, where their formation was purely stochastic in all the dimensions. The percolation threshold was 2.72 vol.%, which is significantly lower than the one stated in the literature for similar composites, since these kind of composites are investigated for the first time. This property can be attributed to the use of a filler of different, diverse morphologies.",
publisher = "ESG",
journal = "International Journal of Electrochemical Science",
title = "Electric Conductivity of Electrolytic Copper Powder Filled Poly(Lactide-co-Glycolide) Composites",
pages = "9825-9837",
doi = "10.20964/2019.10.02"
}

Pavlović, M. M., Pantović, R. V., Janković, Z., Nedeljković, D., Nikolić, N. D., Pavlović, M.,& Stevanović, J.. (2019). Electric Conductivity of Electrolytic Copper Powder Filled Poly(Lactide-co-Glycolide) Composites. in International Journal of Electrochemical Science
ESG., 9825-9837.
https://doi.org/10.20964/2019.10.02

Pavlović MM, Pantović RV, Janković Z, Nedeljković D, Nikolić ND, Pavlović M, Stevanović J. Electric Conductivity of Electrolytic Copper Powder Filled Poly(Lactide-co-Glycolide) Composites. in International Journal of Electrochemical Science. 2019;:9825-9837.
doi:10.20964/2019.10.02 .

Pavlović, Miroslav M., Pantović, Radoje V., Janković, Zoran, Nedeljković, Dragan, Nikolić, Nebojša D., Pavlović, Miomir, Stevanović, Jasmina, "Electric Conductivity of Electrolytic Copper Powder Filled Poly(Lactide-co-Glycolide) Composites" in International Journal of Electrochemical Science (2019):9825-9837,
https://doi.org/10.20964/2019.10.02 . .

TY  - JOUR
AU  - Jegdić, Bore
AU  - Bobić, Biljana
AU  - Nedeljković, Dragan
AU  - Alić, Behar
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2075
AB  - The effect of welding current on the pitting corrosion resistance in the welded joint of austenitic stainless steel X5CrNi18-10 was tested. Welding was carried out using three different current intensity (110 A, 130 A and 150 A). Testing of pitting corrosion resistance was performed by electrochemical potentiodynamic method on the base metal, in the heat affected zone (HAZ) and in the weld metal. Values of pitting corrosion resistance indicators for the base metal are similar to values of the indicators for the weld metal, regardless of the applied welding current. The values of indicators for pitting corrosion resistance in the HAZ are less than the values of these indicators for the base metal and for the weld metal. This is caused by the precipitation of chromium carbides at grain boundaries and by partial formation of chromium depleted areas along the grain boundaries in the HAZ. HAZ that was formed at welding current of 150 A shows the smallest pitting corrosion resistance. This can be explained by the largest depletion in chromium of grain boundary areas at welding current of 150 A. The sensitization degree in the HAZ to intergranular corrosion is also the greatest, in this case. With increase of the sensitization degree to intergranular corrosion the value of metastable pitting potential linearly decreases, which means that pitting corrosion resistance in the HAZ is reduced.
AB  - Ispitan je uticaj jačine struje zavarivanja na otpornost prema piting koroziji zavarenog spoja austenitnog nerđajućeg čelika X5CrNi18-10. Zavarivanje austenitnog nerđajućeg čelika je izvršeno primenom tri različite jačine struje (110 A, 130 A i 150 A). Ispitivanja otpornosti prema piting koroziji su izvršena elektrohemijskom potenciodinamičkom metodom na osnovnom metalu, u zoni uticaja toplote (ZUT) i u metalu šava zavarenog spoja. Vrednosti pokazatelja piting korozije za osnovni metal su bliske vrednostima odgovarajućih pokazatelja za metal šava, nezavisno od primenjene jačine struje pri zavarivanju. Vrednosti pokazatelja piting korozije u ZUT-u su manje od vrednosti odgovarajućih pokazatelja za osnovni metal i metal šava. To je posledica delimičnog izdvajanja hrom-karbida po granicama zrna i obrazovanja hromom osiromašenih oblasti uz granicu zrna u ZUT-u. ZUT formiran pri jačini struje zavarivanja od 150 A pokazuje najmanju otpornost prema piting koroziji, što se može objasniti najvećim osiromašenjem prigraničnih oblasti zrna hromom pri ovoj jačini struje zavarivanja. Tada je i sklonost ZUT-a prema interkristalnoj koroziji najveća. Povećanjem stepena senzibilizacije ZUT-a prema interkristalnoj koroziji vrednost potencijala metastabilnog pitinga se linearno smanjuje, što znači da se smanjuje otpornost ZUT-a prema piting koroziji.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Influence of welding current intensity on pitting corrosion resistance in welded joint of stainless steel X5CrNi18-10
T1  - Uticaj jačine struje zavarivanja na otpornost prema piting koroziji zavarenog spoja nerđajućeg čelika X5CrNi18-10
VL  - 58
IS  - 3
SP  - 297
EP  - 303
DO  - 10.5937/ZasMat1703297J
ER  - 

@article{
author = "Jegdić, Bore and Bobić, Biljana and Nedeljković, Dragan and Alić, Behar",
year = "2017",
abstract = "The effect of welding current on the pitting corrosion resistance in the welded joint of austenitic stainless steel X5CrNi18-10 was tested. Welding was carried out using three different current intensity (110 A, 130 A and 150 A). Testing of pitting corrosion resistance was performed by electrochemical potentiodynamic method on the base metal, in the heat affected zone (HAZ) and in the weld metal. Values of pitting corrosion resistance indicators for the base metal are similar to values of the indicators for the weld metal, regardless of the applied welding current. The values of indicators for pitting corrosion resistance in the HAZ are less than the values of these indicators for the base metal and for the weld metal. This is caused by the precipitation of chromium carbides at grain boundaries and by partial formation of chromium depleted areas along the grain boundaries in the HAZ. HAZ that was formed at welding current of 150 A shows the smallest pitting corrosion resistance. This can be explained by the largest depletion in chromium of grain boundary areas at welding current of 150 A. The sensitization degree in the HAZ to intergranular corrosion is also the greatest, in this case. With increase of the sensitization degree to intergranular corrosion the value of metastable pitting potential linearly decreases, which means that pitting corrosion resistance in the HAZ is reduced., Ispitan je uticaj jačine struje zavarivanja na otpornost prema piting koroziji zavarenog spoja austenitnog nerđajućeg čelika X5CrNi18-10. Zavarivanje austenitnog nerđajućeg čelika je izvršeno primenom tri različite jačine struje (110 A, 130 A i 150 A). Ispitivanja otpornosti prema piting koroziji su izvršena elektrohemijskom potenciodinamičkom metodom na osnovnom metalu, u zoni uticaja toplote (ZUT) i u metalu šava zavarenog spoja. Vrednosti pokazatelja piting korozije za osnovni metal su bliske vrednostima odgovarajućih pokazatelja za metal šava, nezavisno od primenjene jačine struje pri zavarivanju. Vrednosti pokazatelja piting korozije u ZUT-u su manje od vrednosti odgovarajućih pokazatelja za osnovni metal i metal šava. To je posledica delimičnog izdvajanja hrom-karbida po granicama zrna i obrazovanja hromom osiromašenih oblasti uz granicu zrna u ZUT-u. ZUT formiran pri jačini struje zavarivanja od 150 A pokazuje najmanju otpornost prema piting koroziji, što se može objasniti najvećim osiromašenjem prigraničnih oblasti zrna hromom pri ovoj jačini struje zavarivanja. Tada je i sklonost ZUT-a prema interkristalnoj koroziji najveća. Povećanjem stepena senzibilizacije ZUT-a prema interkristalnoj koroziji vrednost potencijala metastabilnog pitinga se linearno smanjuje, što znači da se smanjuje otpornost ZUT-a prema piting koroziji.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Influence of welding current intensity on pitting corrosion resistance in welded joint of stainless steel X5CrNi18-10, Uticaj jačine struje zavarivanja na otpornost prema piting koroziji zavarenog spoja nerđajućeg čelika X5CrNi18-10",
volume = "58",
number = "3",
pages = "297-303",
doi = "10.5937/ZasMat1703297J"
}

Jegdić, B., Bobić, B., Nedeljković, D.,& Alić, B.. (2017). Influence of welding current intensity on pitting corrosion resistance in welded joint of stainless steel X5CrNi18-10. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 58(3), 297-303.
https://doi.org/10.5937/ZasMat1703297J

Jegdić B, Bobić B, Nedeljković D, Alić B. Influence of welding current intensity on pitting corrosion resistance in welded joint of stainless steel X5CrNi18-10. in Zaštita materijala. 2017;58(3):297-303.
doi:10.5937/ZasMat1703297J .

Jegdić, Bore, Bobić, Biljana, Nedeljković, Dragan, Alić, Behar, "Influence of welding current intensity on pitting corrosion resistance in welded joint of stainless steel X5CrNi18-10" in Zaštita materijala, 58, no. 3 (2017):297-303,
https://doi.org/10.5937/ZasMat1703297J . .