TY  - JOUR
AU  - Talijan, Nadežda M.
AU  - Milutinović Nikolić, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Jovanović, Žarko
PY  - 1997
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4175
AB  - The  content of the SmCo5 phase, as the carrier of magnetic  properties, was controlled by X-ray diffraction analysis. The content of the SmCo5 phase, as a function of  sintering time and temperature, under constant heat treatment conditions, was observed through the intensity of its most significant  diffraction peak, which corresponds to the (111) plane. By correlating  these parameters  with a mathematical treatment, a mutual dependence was established. A regression dependence  was obtained that showed  that the intensity of the diffraction peak of the (111) plane of the SmCo5 phase depends upon the squares of both  the sintering time and temperature, for given heat treatment conditions. It is possible to optimize the sintering conditions by calculating values of sintering time and temperature for which this dependence has its maximum.
PB  - Sintering Society
T2  - Science of Sintering
T1  - X-Ray Analysis in the Optimization  of the Sintering Process of  SmCo5 Magnets
VL  - 29
IS  - 2
SP  - 69
EP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_cer_4175
ER  - 

@article{
author = "Talijan, Nadežda M. and Milutinović Nikolić, Aleksandra and Stajić-Trošić, Jasna and Jovanović, Žarko",
year = "1997",
abstract = "The  content of the SmCo5 phase, as the carrier of magnetic  properties, was controlled by X-ray diffraction analysis. The content of the SmCo5 phase, as a function of  sintering time and temperature, under constant heat treatment conditions, was observed through the intensity of its most significant  diffraction peak, which corresponds to the (111) plane. By correlating  these parameters  with a mathematical treatment, a mutual dependence was established. A regression dependence  was obtained that showed  that the intensity of the diffraction peak of the (111) plane of the SmCo5 phase depends upon the squares of both  the sintering time and temperature, for given heat treatment conditions. It is possible to optimize the sintering conditions by calculating values of sintering time and temperature for which this dependence has its maximum.",
publisher = "Sintering Society",
journal = "Science of Sintering",
title = "X-Ray Analysis in the Optimization  of the Sintering Process of  SmCo5 Magnets",
volume = "29",
number = "2",
pages = "69-75",
url = "https://hdl.handle.net/21.15107/rcub_cer_4175"
}

Talijan, N. M., Milutinović Nikolić, A., Stajić-Trošić, J.,& Jovanović, Ž.. (1997). X-Ray Analysis in the Optimization  of the Sintering Process of  SmCo5 Magnets. in Science of Sintering
Sintering Society., 29(2), 69-75.
https://hdl.handle.net/21.15107/rcub_cer_4175

Talijan NM, Milutinović Nikolić A, Stajić-Trošić J, Jovanović Ž. X-Ray Analysis in the Optimization  of the Sintering Process of  SmCo5 Magnets. in Science of Sintering. 1997;29(2):69-75.
https://hdl.handle.net/21.15107/rcub_cer_4175 .

Talijan, Nadežda M., Milutinović Nikolić, Aleksandra, Stajić-Trošić, Jasna, Jovanović, Žarko, "X-Ray Analysis in the Optimization  of the Sintering Process of  SmCo5 Magnets" in Science of Sintering, 29, no. 2 (1997):69-75,
https://hdl.handle.net/21.15107/rcub_cer_4175 .

TY  - JOUR
AU  - Talijan, Nadežda M.
AU  - Milutinović Nikolić, Aleksandra
AU  - Jovanović, Žarko
PY  - 1996
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4165
AB  - Understanding of the thermal stability of intermetallic  SmCo5 powder is essential for designing the working atmosphere in all phases of the technological procedure  in the production of sintered SmCo5 magnets to obtain maximal magnetic properties. The thermal stability of the SmCo5 powder with defined chemical composition and particle size was investigated in the interval from 20 to 900*C. Commercial SmCo5 powder was used in this experiment. The powder was milled in anhydrous toluene in an agate mortar to fine powder of quality used in the production of sintered magnets.  All the experiments were carried out with  powder of an average particle size of 7.23*m, established by SEM. The  thermal stability of the SmCo5 powder in static air atmosphere  was investigated by thermogravimetric analysis  (TGA) using  a DuPont Thermal Analyzer. Investigation of the behavior of  SmCo5 powder during heating was carried out using new samples of  SmCo5 powder for each  of the investigated temperature cycles. It was found by TGA  that up to 200*C, the oxidation of SmCo5 was negligible. X-Ray diffraction of the thermogravimetric experimental residue of the SmCo5 powder, heated at 240*C, yielded only the presence of the SmCo5 phase. By X-ray diffraction different crystal forms were identified depending on the maximal heating temperature. The following phases were identified: Sm2O3, Co, CoO, Co3O4 and SmCoO3. According to TG and X-ray results, for each of the investigated temperatures, the corresponding chemical reactions were established. The experimental data from both the thermal and X-ray investigations confirm that the phases of pressing and aligning the SmCo5 powder, in the process of producing  sintered SmCo5 magnets, may be performed without a protective  atmosphere.
AB  - Истражена је могућност коришћења вакуума на граници између ниског и високог (10-3-10-4 bar) као заштитне атмосфере у фазама синтеровања и термичке обраде SmCo5 магнета. Испитан је утицај заштитне атмосфере на структурне промене SmCo5 магнета за различите температурне и временске интервале синтеровања, а за константну температуру и у време термичке обраде. Присуство оксидних и других инклузија у било ком делу синтерованих SmCo5 узорака, осим у површинском слоју, није доказано. Сканирајућом електронском микроскопијом (СЕМ), коришћењем Texture Analysis System-a ( TAS´+) мерена је дебљина оскидне зоне. Утврђен је регресиони модел према коме дебљина оксидне зоне расте са квадратом температуре синтеровања, а линеарно са временом синтеровања, за дефинисану температуру термичке обраде.
PB  - ETRAN Society
T2  - Science of Sintering
T1  - The influence of protective atmosphere on oxidation of sintered SmCo5 magnetic materials
VL  - 28
IS  - Special Issue
SP  - 179
EP  - 184
UR  - https://hdl.handle.net/21.15107/rcub_cer_4165
ER  - 

@article{
author = "Talijan, Nadežda M. and Milutinović Nikolić, Aleksandra and Jovanović, Žarko",
year = "1996",
abstract = "Understanding of the thermal stability of intermetallic  SmCo5 powder is essential for designing the working atmosphere in all phases of the technological procedure  in the production of sintered SmCo5 magnets to obtain maximal magnetic properties. The thermal stability of the SmCo5 powder with defined chemical composition and particle size was investigated in the interval from 20 to 900*C. Commercial SmCo5 powder was used in this experiment. The powder was milled in anhydrous toluene in an agate mortar to fine powder of quality used in the production of sintered magnets.  All the experiments were carried out with  powder of an average particle size of 7.23*m, established by SEM. The  thermal stability of the SmCo5 powder in static air atmosphere  was investigated by thermogravimetric analysis  (TGA) using  a DuPont Thermal Analyzer. Investigation of the behavior of  SmCo5 powder during heating was carried out using new samples of  SmCo5 powder for each  of the investigated temperature cycles. It was found by TGA  that up to 200*C, the oxidation of SmCo5 was negligible. X-Ray diffraction of the thermogravimetric experimental residue of the SmCo5 powder, heated at 240*C, yielded only the presence of the SmCo5 phase. By X-ray diffraction different crystal forms were identified depending on the maximal heating temperature. The following phases were identified: Sm2O3, Co, CoO, Co3O4 and SmCoO3. According to TG and X-ray results, for each of the investigated temperatures, the corresponding chemical reactions were established. The experimental data from both the thermal and X-ray investigations confirm that the phases of pressing and aligning the SmCo5 powder, in the process of producing  sintered SmCo5 magnets, may be performed without a protective  atmosphere., Истражена је могућност коришћења вакуума на граници између ниског и високог (10-3-10-4 bar) као заштитне атмосфере у фазама синтеровања и термичке обраде SmCo5 магнета. Испитан је утицај заштитне атмосфере на структурне промене SmCo5 магнета за различите температурне и временске интервале синтеровања, а за константну температуру и у време термичке обраде. Присуство оксидних и других инклузија у било ком делу синтерованих SmCo5 узорака, осим у површинском слоју, није доказано. Сканирајућом електронском микроскопијом (СЕМ), коришћењем Texture Analysis System-a ( TAS´+) мерена је дебљина оскидне зоне. Утврђен је регресиони модел према коме дебљина оксидне зоне расте са квадратом температуре синтеровања, а линеарно са временом синтеровања, за дефинисану температуру термичке обраде.",
publisher = "ETRAN Society",
journal = "Science of Sintering",
title = "The influence of protective atmosphere on oxidation of sintered SmCo5 magnetic materials",
volume = "28",
number = "Special Issue",
pages = "179-184",
url = "https://hdl.handle.net/21.15107/rcub_cer_4165"
}

Talijan, N. M., Milutinović Nikolić, A.,& Jovanović, Ž.. (1996). The influence of protective atmosphere on oxidation of sintered SmCo5 magnetic materials. in Science of Sintering
ETRAN Society., 28(Special Issue), 179-184.
https://hdl.handle.net/21.15107/rcub_cer_4165

Talijan NM, Milutinović Nikolić A, Jovanović Ž. The influence of protective atmosphere on oxidation of sintered SmCo5 magnetic materials. in Science of Sintering. 1996;28(Special Issue):179-184.
https://hdl.handle.net/21.15107/rcub_cer_4165 .

Talijan, Nadežda M., Milutinović Nikolić, Aleksandra, Jovanović, Žarko, "The influence of protective atmosphere on oxidation of sintered SmCo5 magnetic materials" in Science of Sintering, 28, no. Special Issue (1996):179-184,
https://hdl.handle.net/21.15107/rcub_cer_4165 .