| 摘要 |
PURPOSE:To obtain an electrical contact excellent in economy and durability as well by specifying the thickness of a bed layer for the electrical contact composed of a metallic bed layer in a nickel series and a metallic surface layer in a palladium series which are laminated on a metallic backing surface. CONSTITUTION:In an electrical contact composed of a metallic bed layer in a nickel series and of a metallic surface layer in a palladium series which are laminated on a metallic backing surface, the metallic bed layer in a nickel series is composed of nickel or a nickel alloy at least, as thin as 0.8mum, which includes an amorphous nickel alloy layer at least, as thin as 0.08mum on its surface side, and the metallic surface layer in a palladium series is composed of palladium or a palladium-nickel alloy at least, as thin as 0.08mum. By this constitution, the electrical contact carries excellent durability, and also exhibits a static constant resistant value in a corrosive environment in particular for a long time. |
