| 摘要 |
PROBLEM TO BE SOLVED: To provide a method where, in heat treatment for modifying metal powder, e.g., of increasing crystal grain diameters, metal powder in which the flocculation of each powder is prevented and dispersibility is maintained, and having a sharp grain size distribution can be obtained. SOLUTION: Metal powder as an object for modification is heat-treated using a jet mill apparatus where it is heated by a high pressure air flow at 240 to 800°C in a neutral or reducing atmosphere, and is pulverized (cracked) by collision and friction between metals in a pulverization chamber. As the objective metal powder, base metal powder is preferable, and further, Ni powder is more preferable. COPYRIGHT: (C)2009,JPO&INPIT
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