发明名称 |
METHOD FOR PREPARATION OF SINTERED PERMANENT MAGNET |
摘要 |
The method for preparation of sintered permanent magnets according to the present invention comprises the steps of: mixing fully fine powder of a crystalline mother alloy for permanent magnet containing a rare-earth element, Fe and B as the essential components with fine powder of zinc oxide, compaction molding the resulted mixture in the presence of a magnetic field, sintering the compacted mixture in vacuum to cause generation of oxygen and metallic zinc by thermal decomposition of the zinc oxide; segregation of a part of metallic component in the mother alloy at the boundary and inside of the mother alloy crystal; formation of amorphous metallic oxide by forced oxidation of the segregated metal with the generated oxygen; crystallization of the amorphous metallic oxide: formation of an epitaxial junction between the crystallized metallic oxide and the mother alloy crystal; and evaporation of the metallic zinc into the vacuum, and quenching the sintered compact.
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申请公布号 |
CA2316144(A1) |
申请公布日期 |
2001.02.17 |
申请号 |
CA20002316144 |
申请日期 |
2000.08.17 |
申请人 |
SANEI KASEI CO., LTD. |
发明人 |
KUWABARA, YOSHIKI;SAKAGUCHI, KENJI;SATO, HIROJI;HIRATA, MITSUHISA;NARITA, MINORU;TONO, KOICHI;SUZUKI, KAZUSHI;KAWASAKI, YUKO;OKADA, KEIJI;SEKINE, SHIGENOBU |
分类号 |
B22F3/02;B22F3/10;C22C38/00;H01F1/057;H01F1/08;H01F41/02;(IPC1-7):H01F41/02;H01F7/02 |
主分类号 |
B22F3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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