Co過剰型Fe-Co磁歪積層材を用いた磁歪式アクチュエータ特性の評価

抄録

Fe-Co alloy has recently attracted attention becase the alloy has high Curie temperature, high saturation magnetization and high strength. Fe-Co has a small amount of magnetostriction compared with conventional magnetostrictive materials, but it has been reported that high magnetostriction is expressed by appropriate heat treatment. In this study, we investigated the characteristics of the magnetostrictive actuators by using the laminated Fe-Co alloy composites. The raw materials were melted in a furnace, and the melted metals were forged into original ingots by hot and cold rolling for utilizing a thermal diffusion generated in the bonding surface under the melting temperature of the matrix. We revealed that the deflection of the laminated Fe-Co/Ni composite is larger than that of the laminated Fe-Co/Fe composite when an electric current is applied to the laminated composite. In the case of the laminated Fe-Co/Ni composite, deflection of about 1 mm was obtained at about 14 A.