Rare-earth magnet and method of manufacturing the same

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United States of America

PATENT NO 12217907
SERIAL NO

17539491

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Abstract

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A rare-earth magnet and a method of manufacturing the same are provided. The method includes: preparing Sm—Fe—N magnetic powder; preparing reforming material powder containing metallic zinc; mixing the magnetic powder and the reforming material powder to obtain mixed powder; subjecting the mixed powder to compression molding in a magnetic field to obtain a magnetic-field molded body; subjecting the magnetic-field molded body to pressure sintering to obtain a sintered body; and subjecting the sintered body to heat treatment. A content proportion of the metallic zinc in the reforming material powder is 10 to 30% by mass with respect to the mixed powder. When a temperature and time in conditions for the heat treatment are defined as x° C. and y hours, respectively, the formulas y≥−0.32x+136 and 350≤x≤410 are met.

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Patent Owner(s)

  • 501 TOYOTA JIDOSHA KABUSHIKI KAISHA; NICHIA CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichigozaki, Daisuke Toyota, JP 31 93
Ito, Masaaki Anjo, JP 191 1408
Kinoshita, Akihito Mishima, JP 19 21
Kume, Michiya Anan, JP 13 22
Maehara, Hisashi Itano-gun, JP 20 11
Sakuma, Noritsugu Mishima, JP 55 138

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