Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takehisa Minowa0
Kenji Yamamoto0
Koichi Hirota0
Date of Patent
September 6, 2011
0Patent Application Number
113150990
Date Filed
December 23, 2005
0Patent Primary Examiner
Patent abstract
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.
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