Novel Powder Processing Technologies for Production of Rare-earth Permanent Magnets

被引：0
作者：
Takagi K. [1 ]
Hirayama Y. [1 ]
Okada S. [1 ]
Yamaguchi W. [1 ]
Ozaki K. [1 ]
机构：
[1] Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya
来源：
Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | 2022年 / 69卷
关键词：
Coercivity; Powder synthesis; Rare-earth permanent magnets; Sintering; Sm[!sub]2[!/sub]Fe[!sub]17[!/sub]N[!sub]3[!/sub;
D O I：
10.2497/jjspm.69.S30
中图分类号：
学科分类号：
摘要：
Post-neodymium magnets that possess high heat resistance, coercivity, and (BH)max are desired for futuregeneration motors. However, the candidate materials for post-neodymium magnets such as Sm2Fe17N3 and metastable magnetic alloys have certain process-related problems: low sinterability due to thermal decomposition at elevated temperatures, deterioration of coercivity during sintering, and the poor coercivity of the raw powder. Various developments in powder processing are underway with the aim of overcoming these problems. So far, the development of advanced powder metallurgy techniques has achieved Sm2Fe17N3 anisotropic sintered magnets without coercivity deterioration, and advances in chemical powder synthesis techniques have been successful in producing Sm2Fe17N3 fine powders with huge coercivity. The challenge of a new powder process is expected to open the way to realizing post-neodymium magnets. © 2022 Japan Society of Powder and Powder Metallurgy.
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页码：S30 / S37
页数：7
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