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公开(公告)号:US10256015B2
公开(公告)日:2019-04-09
申请号:US14906682
申请日:2014-08-08
Applicant: TDK Corporation
Inventor: Masashi Miwa , Haruna Nakajima , Isao Kanada
Abstract: The present invention provides an R-T-B based sintered magnet having excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains R2T14B crystal grains, wherein, an R—Ga—Co—Cu—N concentrated part exists in a grain boundary formed between or among two or more adjacent R2T14B crystal grains, and the concentrations of R, Ga, Co, Cu and N in the R—Ga—Co—Cu—N concentrated part are higher than those in the R2T14B crystal grains respectively.