Fe-25mol%Alメカニカルアロイング過程の磁気特性変化

概要

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The pure Fe and pure Al (25 mol%) powder mixture was mechanically alloyed for various times by a dry tumbler ball-milling. The magnetic property of the milled powder was measured by a vibrating sample magnetometer (VSM) and a <SUP>57</SUP>Fe Mössbauer spectroscopy. The powder milled for an enough long time, 1800ks, had a broad Mossbauer spectrum. It was predicted that the fully milled powder was composed with both ordered and disordered Fe<SUB>3</SUB>Al phases. The VSM measurements showed that the saturation magnetization (Ms) of the milled powder was decreased with the milling time until 360 ks due to the solid solution of Al into α-Fe. However, after 360 ks, the Ms was contrary increased with straining by the milling. The Ms of the powder milled for 1800ks decreased by annealing.
社団法人粉体粉末冶金協会の論文
2000-12-15