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Method of making sintered compact for rare earth magnet



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Patent 7056393
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Document Number
US Patent 7056393
Issued Date
June 6, 2006
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Abstract
A method of making a sintered body for a rare earth magnet includes the steps of (a) preparing a first coarse powder by coarsely pulverizing a rare earth alloy sintered body by a hydrogen pulverization process, (b) preparing a first fine powder by finely pulverizing the first coarse powder, (c) preparing a second fine powder by pulverizing an alloy block of a rare earth alloy material, and (d) sintering a mixed powder including the first and second fine powders. The first and second fine powders each includes a main phase represented by (LR.sub.1-xHR.sub.x).sub.2T.sub.14A, where T is Fe and/or at least one non-Fe transition metal element; A is boron and/or carbon; LR is at least one light rare earth element; HR is at least one heavy rare earth element; and 0.ltoreq.x<1.
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Number of Claims:
10
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Published
June 6, 2006
Application Number
10/381,007
Filed
May 28, 2002
US Classification
148/101   148/102 148/103 148/104 148/122 419/12 419/30 419/33 419/38
Int'l Classification
H01F   1/057   (20060101)  
Examiner
Attorney/Law Firm
Priority Data
May 30, 2001 [JP] 2001-163401
USPTO Field of Search
148/101   148/102   148/103   148/104   148/122   419/12   419/30   419/33   419/38  
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