| 摘要 |
PURPOSE:To obtain a sliding contact material for a micromotor having superior wear resistance in high-load and high-speed rotation while reducing the amount of Cu having inferior oxidation resistance by adding specified elements to an Ag- Pd-Cu alloy for a sliding contact. CONSTITUTION:An Ag-Pd-Cu alloy consisting of 10-80% Pd, 5-25% Cu, 1-5% at least one among Zn, In, Sn and Pb, 0-1.0% at least one between Ti and Zr, and the balance Ag is used as a sliding contact material for the high-speed rotation of a micromotor or the like. Cu has inferior oxidation resistance, and when it undergoes sliding wear, Cu oxide particles are formed to increase the contact resistance, so the Cu content can not be increased. In case of a low Cu content, the precipitation hardenability is reduced. Said added elements prevent the reduction and improve the mechanical characteristics and wear resistance. |
