Method for modifying grain boundary of Nd—Fe—B base magnet, and body with modified grain boundary treated by the method

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United States of America

PATENT NO 10589355
SERIAL NO

15772465

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Abstract

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An improvement of coercive force of Nd—Fe—B base sintered magnet can be realized while suppressing a decrease in remanent magnetic flux density to the minimum using a method for modifying grain boundary which comprises heat-treating an Nd—Fe—B base magnet with a specific alloy disposed on its surface, the alloy having the following Formula 1:

description='In-line Formulae' end='lead'RxAyBz  (1)description='In-line Formulae' end='tail'

wherein R represents at least one rare earth element including Sc and Y, A represents Ca or Li, B represents an unavoidable impurity, and 2≤x≤99, 1≤y

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Patent Owner(s)

  • NISSAN MOTOR CO. LTD.; OSAKA UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujikawa, Shinichirou Kanagawa, JP 3 5
Furuya, Takashi Kanagawa, JP 44 492
Kawai, Seiji Kanagawa, JP 27 361
Machida, Kenichi Osaka, JP 126 1010
Nakazawa, Koichi Kanagawa, JP 29 117
Uenohara, Masaru Kanagawa, JP 1 0
Yamato, Genya Osaka, JP 1 0

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