| 摘要 |
PROBLEM TO BE SOLVED: To provide a soft magnetic material improved in productivity and in magnetic property, and also to provide its production process. SOLUTION: A coating consisting of metal or semi-metal is formed on the surface of soft magnetic powder containing iron and oxygen (step S102). In this case, it is suitable to form a silicon containing film on the surface of the coating. Then, the soft magnetic powder is subjected to press molding to fabricate a formed body (step S103). Since the coating is metal film or semi-metal with large ductility, the formed body fabricated by the press molding has high density, and at the same time generation of damage like crack is prevented. It is the same as when the silicon containing film is formed as above. Then, the formed body is subjected to heat treatment, and thereby the surface and the interface of the soft magnetic powder which constitutes the forming body, are oxidized to form oxide film (step S104). In this way, the generation of eddy current loss is prevented by the oxide film. COPYRIGHT: (C)2009,JPO&INPIT
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