| 简介 |
PROBLEM TO BE SOLVED : To stably obtain a constant quality by improving a method for producing alloy powder or an intermetallic compound using a reduction-diffusing method. SOLUTION : The method for producing R-T base or R-T-X base alloy powder having a pre-reduction process, in which mixture of R oxide powder and T oxide powder is heated under rducing gas atmosphere and an intermediate raw material reduced to the metal-state at ≥ 50 atm% of the theoretical quantity of the T oxide powder, is obtained, a reduction-diffusing process, in which a complexed mixture is obtained by mixing the above intermediate raw material and Ca, a collapsing process, in which generated alloy powder is obtained by charging the above complexed mixture into water, and a filming process, in which the film is formed on the surface of the generated alloy powder in acid-water solution having pH range of 5.5-7.3, is provided. Wherein, R : rare earth elements containing Y, T : at least one element selected from the group of Fe, Co, Ni, and X : at least one element selected from the group of N, B, C. COPYRIGHT : (C)2004, JPO |
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