Article Back

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:
426 views / 238 downloads
View Full-text Download PDF
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

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Scroll to Top