公开(公告)号：US20060137767A1

公开(公告)日：2006-06-29

申请号：US11315099

申请日：2005-12-23

申请人： Kenji Yamamoto ,  Koichi Hirota ,  Takehis Minowa

发明人： Kenji Yamamoto ,  Koichi Hirota ,  Takehis Minowa

IPC分类号： H01F1/057

CPC分类号： H01F1/0577 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F1/058

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.

摘要翻译： 稀土永磁材料是基于R-Fe-Co-B-Al-Cu系，其中R是选自Nd，Pr，Dy，Tb和Ho中的至少一种元素，15至33重量％的Nd 被包含 选自MB，MB-Cu和MC化合物（其中M为Ti，Zr或Hf）和R氧化物的至少两种化合物在合金结构内析出，其平均粒度高达5um的颗粒均匀分布 在合金结构中间隔高达50毫米。