发明申请
- 专利标题： Nd-Fe-B rare earth permanent magnet material
- 专利标题（中）： Nd-Fe-B稀土永磁材料
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申请号： US11315099申请日： 2005-12-23
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公开(公告)号： US20060137767A1公开(公告)日： 2006-06-29
- 发明人: Kenji Yamamoto , Koichi Hirota , Takehis Minowa
- 申请人： Kenji Yamamoto , Koichi Hirota , Takehis Minowa
- 申请人地址： JP Tokyo
- 专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2004-375784 20041227
- 主分类号： H01F1/057
- IPC分类号： H01F1/057
摘要：
A rare earth permanent magnet material is based on an R—Fe—Co—B—Al—Cu system wherein R is at least one element selected from Nd, Pr, Dy, Tb, and Ho, 15 to 33% by weight of Nd being contained. At least two compounds selected from M-B, M-B—Cu and M-C compounds (wherein M is Ti, Zr or Hf) and an R oxide have precipitated within the alloy structure as grains having an average grain size of up to 5 μm which are uniformly distributed in the alloy structure at intervals of up to 50 μm.
公开/授权文献
- US08012269B2 Nd-Fe-B rare earth permanent magnet material 公开/授权日：2011-09-06