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Process for production of R-Fe-B-based rare earth sintered magnet, and steam control member 发明授权

2023-07-21 1310 1882K 0

专利信息

申请日期 2025-07-10 申请号 US13382755
公开(公告)号 US8845821B2 公开(公告)日 2014-09-30
公开国别 US 申请人省市代码 全国
申请人 Tomoori Odaka; Hideyuki Morimoto
简介 A sintered R—Fe—B based rare-earth magnet body 1 including, as a main phase, crystal grains of an R2Fe14B type compound that includes a light rare-earth element RL, which is Nd and/or Pr, as a major rare-earth element R is provided. A bulk body 2 including a heavy rare-earth element RH, which is at least one of Dy, Ho and Tb is also provided. The sintered magnet body 1 and the bulk body 2 are arranged in a processing chamber 4 with a vapor control member 3 interposed between the sintered magnet body 1 and the bulk body 2. And the inside of the processing chamber 4 is heated to a temperature of 700° C. to 1000° C., thereby diffusing the heavy rare-earth element RH inside the sintered magnet body 1 while supplying the heavy rare-earth element RH from the bulk body 2 to the surface of the sintered magnet body 1 via the vapor control member 3.


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