Hard Magnetic Properties and the Features of Nanostructure of High-Temperature Sm-Co-Fe-Cu-Zr Magnet with Abnormal Temperature Dependence of Coercivity
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Hard Magnetic Properties and the Features of Nanostructure of High-Temperature Sm-Co-Fe-Cu-Zr Magnet with Abnormal Temperature Dependence of Coercivity
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| Автор |
Golovnia, O. A.
Popov, A. G. Mushnikov, N. V. Protasov, A. V. Pradeep, K. G. Ogurtsov, A. V. Taranov, D. V. Tishin, A. M. |
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| Тематика |
NANOCRYSTALLINE CELLULAR STRUCTURE
PERMANENT MAGNETS SM2CO17 SMCO5 |
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| Описание |
This paper presents methods and approaches that can be used for production of Sm-Co-Fe-Cu-Zr permanent magnets with working temperatures of up to 550 °C. It is shown that the content of Sm, Cu, and Fe significantly affects the coercivity (Hc) value at high operating temperatures. A decrease in the content of Fe, which replaces Co, and an increase in the content of Sm in Sm-Co-Fe-Cu-Zr alloys lead to a decrease in Hc value at room temperature, but significantly increase Hc at temperatures of about 500 °C. Increasing the Cu concentration enhances the Hc values at all operating temperatures. From analysis of the dependence of temperature coefficients of the coercivity on the concentrations of various constituent elements in this alloy, the optimum chemical composition that qualifies for high-temperature permanent magnet (HTPM) application were determined. 3D atom probe tomography analysis shows that the nanostructure of the HTPM is characterized by the formation of Sm2(Co,Fe)17 (2:17) cells relatively smaller in size along with the slightly thickened Sm(Co,Cu)5 (1:5) boundary phase compared to those of the high-energy permanent magnet compositions. An inhomogeneous distribution of Cu was also noticed in the 1:5 phase. At the boundary between 1:5 and 2:17 phases, an interface with lowered anisotropy constants has developed, which could be the reason for the observed high coercivity values. © 2023 by the authors.
Ministry of Education and Science of the Russian Federation, Minobrnauka: 122021000034-9; Ural Federal University, UrFU Study of magnetic and structural properties was supported by the state assignment of the Ministry of Education and Science of Russia (theme “Magnet”, No. 122021000034-9) and Development Program of the Ural Federal University “Priority-2030”. |
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| Дата |
2024-04-05T16:27:38Z
2024-04-05T16:27:38Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Golovnia, O, Popov, A, Mushnikov, N, Protasov, A, Pradeep, K, Ogurtsov, AV, Taranov, D & Tishin, AM 2023, 'Hard Magnetic Properties and the Features of Nanostructure of High-Temperature Sm-Co-Fe-Cu-Zr Magnet with Abnormal Temperature Dependence of Coercivity', Nanomaterials, Том. 13, № 13, 1899. https://doi.org/10.3390/nano13131899
Golovnia, O., Popov, A., Mushnikov, N., Protasov, A., Pradeep, K., Ogurtsov, A. V., Taranov, D., & Tishin, A. M. (2023). Hard Magnetic Properties and the Features of Nanostructure of High-Temperature Sm-Co-Fe-Cu-Zr Magnet with Abnormal Temperature Dependence of Coercivity. Nanomaterials, 13(13), [1899]. https://doi.org/10.3390/nano13131899 2079-4991 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164668332&doi=10.3390%2fnano13131899&partnerID=40&md5=c8f7a31f0e9a5b6eb04c819644e83224 https://www.mdpi.com/2079-4991/13/13/1899/pdf?version=1687330710 http://elar.urfu.ru/handle/10995/130633 10.3390/nano13131899 85164668332 001031196800001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Multidisciplinary Digital Publishing Institute (MDPI)
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| Источник |
Nanomaterials
Nanomaterials |
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