| 摘要 |
PROBLEM TO BE SOLVED: To provide Fe-Cr-Al based magnetic powder whose surface can be coated with a substance having high electric resistance without depending on expensive chemical treatment, and which can attain high density when being made into a compact, to provide an Fe-Cr-Al based magnetic powder compact, and to provide its production method. SOLUTION: The Fe-Cr-Al based magnetic powder is composed of, by mass, 1.0 to 30.0% Cr and 1.0 to 8.0% Al, and the balance substantially Fe. In the Fe-Cr-Al based magnetic powder compact, all the contact faces between respective particles composing the structure are substantially isolated by an oxide film containing alumina. The compact can be obtained, e.g., by subjecting the above magnetic powder to heating treatment in an oxidizing atmosphere at≥800°C, and allowing an oxide film containing alumina of≥20 mass% to self-form so as to be compacted by discharge plasma sintering. COPYRIGHT: (C)2005,JPO&NCIPI
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