ジュール熱による銅マイクロ細線の結晶粒制御について

抄録

Metallic micro- or nano-wires show higher strength compared with their bulk counterparts due to their fine crystalline structures. Instead, they become brittle and the workability is decreased. In this study, for improving ductility, the crystalline grains of the 25 μm-thick Cu microwire are grown by Joule heating caused by supplying current through the wire. Moreover, small-span bending test was performed for the Cu microwires with and without heating, and it was confirmed that the yield stress of the Cu microwire was decreased by the heating.