| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of manufacturing a sintered body wherein soft magnetic powder whose principal component is inexpensive iron is used for a raw material and the surface of the soft magnetic powder has a tight and strong high electric resistance layer with simple processes. SOLUTION: Fe-Si alloy powder is heated in a weakly acidic environment to form an SiO<SB>2</SB>oxide film on the surface, the powder is press-formed, and sintered in the weakly acidic environment to obtain the sintered body. A thin oxide film with high electric resistance and the Si of which is selectively oxidized is formed by executing a surface oxidation process in the weakly acidic environment using water vapor, and the powder is furthermore sintered in the weakly acidic environment to permit sintering while repairing the oxide film wherein cracks or the like are caused during press forming. COPYRIGHT: (C)2006,JPO&NCIPI
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