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APPLICATION OF HYDROGEN ATMOSPHERE FOR DENSIFICATION OF (SM,ZR)(CO,CU,FE)Z MAGNETS

1 DORMIDONTOV Nikolay A.
Co-authors:
1 KOLCHUGINA Natalia B. 2 DORMIDONTOV Andrei G. 1 BURKHANOV Gennadiy S. 3 SKOTNICOVA Katerina 1 PROKOFEV Pavel A. 1 RUSINOV Denis A.
Institutions:
1 Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia, ontip@mail.ru, natalik014@yandex.ru
2 OOO MagnitoElektroMekhanika (MEM), Moscow, Russia, doremi.andr@gmail.com
3 VSB - Technical University of Ostrava, Faculty of Materials Science and Technology, Czech Republic, EU, Katerina.Skotnicova@vsb.cz
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1428-1435
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2019.955
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
544 views / 301 downloads
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Abstract

The effect of hydrogen atmosphere sintering in manufacturing (Sm,Zr)(Со,Cu,Fe)Z-based permanent magnets on their properties has been studied. It is shown that sintering in hydrogen, in comparison with sintering in argon, allows obtaining a higher density of billets, while reducing the optimal sintering temperature range by 20 °C. To achieve the same levels of intrinsic coercivity, hydrogen sintered samples require 1.5 times less time of isothermal aging, at the same temperature of heat treatment. In the end, (Sm,Zr)(Со,Cu,Fe)Z-based permanent magnets of standard chemical composition sintered in a hydrogen atmosphere, in comparison with sintered in argon, are characterized by higher hysteresis performances: remanence, induction coercivity, intrinsic coercivity and static energy product.

Keywords: Rare earth permanent magnets, hydrogen sintering, heat treatment, coercive force

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