急冷CoFe合金薄帯の磁気・磁歪特性に及ぼす熱処理・圧延効果

抄録

　Co-rich Co-Fe alloy is known to possess of high saturation magnetostriction, high Curie temperature and good mechanical property. In this study, the rapidly solidified Co₇₅Fe₂₅ alloy were studied for appearance further large magnetostriction due to change in both of the structure and the texture by a combination of heat treatment and cold-rolling. The Co-Fe alloy ribbons were produced by a single Cu-roller rapid solidification, and subsequently annealed at 973-1023K for 1h in vacuum atmosphere after rolling. For evaluation of the heat treatment effect and the rolling effect, magnetic properties such as magnetization, coercivity, magnetostriction and susceptibility were measured as well as crystal structure. As a result, enhancement of magnetostriction improved due to combination of cold-rolling and annealing because precipitating appearance of fcc phase decreased, and also magnetostrictive susceptibility improved caused by enhancement of magnetostriction reached to about 2 times. Additionally the coercivity of annealed specimens after rolling showed a decreasing tendency compared with that of without rolling.