Fe-25mol%Alメカニカルアロイング過程の磁気特性変化

抄録

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 ⁵⁷Fe 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 Fe₃Al 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.