| 摘要 |
PURPOSE:To produce flaky amorphous alloy powder of a small particle size with high pulverization efficiency by pulverizing a molten alloy by a water atomization method and by mechanically repulverizing the resulting alloy powder with an attriter in the presence of a pulverizing assistant. CONSTITUTION:A molten alloy is pulverized by a water atomization method to form powder of irregular shape. The alloy powder is mixed with 0.1-50 wt.% pulverizing assistant and repulverized with an attriter. The pulverizing assistant is a solid assistant, e.g., a higher fatty acid such as stearic acid, oleic acid or lauric acid, metallic soap such as zinc stearate, a higher aliphatic alcohol such as stearyl alcohol, a higher aliphatic amine such as ethanolamine or polyethylene wax, or an org. solvent such as alcohol, glycol or ester as a liq. assistant. Ultrafine flaky alloy powder can be produced with superior pulverization efficiency.
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