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Method for producing surface-modified rare earth metal-based sintered magnet 发明授权

2023-11-08 3920 992K 0

专利信息

申请日期 2025-07-12 申请号 US13807111
公开(公告)号 US9558885B2 公开(公告)日 2017-01-31
公开国别 US 申请人省市代码 全国
申请人 Mahoro Fujihara; Koshi Yoshimura
简介 An object of the present invention is to provide a method for producing a surface-modified rare earth metal-based sintered magnet having extremely excellent corrosion resistance even in an environment with fluctuating temperature and humidity and also having excellent magnetic characteristics. The method for producing a surface-modified rare earth metal-based sintered magnet of the present invention as a means for achieving the object is characterized by comprising a step of subjecting a rare earth metal-based sintered magnet to a heat treatment at 200° C. to 600° C. in an atmosphere having an oxygen partial pressure of 1×103 Pa to 1×105 Pa and a water vapor partial pressure of 45 Pa or less with the ratio between the oxygen partial pressure and the water vapor partial pressure (oxygen partial pressure/water vapor partial pressure) being 450 to 20000.


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