Copper-based SiCp rare-earth ceramet composite electric contact material

Abstract

The invention provides a cermet material formed by compounding copper, SiC, rare earth and so on. The electric and thermal conductivity, the arc extinguishing, the welding resistance, the current corrosion resistance, the anti-adhesion property and the frictional characteristic of the cermet material can be a par with those of a silver-based contact, and the cermet material can substitute for prior silver-based electric engineering contact materials and copper-based electrical contact materials. The cermet material is characterized by selecting the copper as a core matrix material, taking silicon carbide particles as an enhancement item, selecting rare earth containing lanthanum or cerium as an improvement item, improving the physicochemical properties of the surface and a matrix of a contact material, improving the oxidation resistance and the corrosion resistance of the electrical contact surface, and promoting the adhesive force of a liquid phase and a solid phase. The material can fully achieve current indicators of the contact material and the corresponding electric appliance standard, does not use previous metal silver, does not contain cadmium and cadmium oxide, fully achieves the dual aim of reducing the environmental pollution and saving previous metal resources, greatly reduces the production cost of the contact material, and satisfies the development trend of electric appliance products in China and in the world.

Description

1. Technical field [0001] The invention belongs to the field of metal composite materials, and provides a copper-based silicon carbide rare earth electric contact composite material used in the field of medium and low loads. This material is a kind of electrical contact material widely used in medium and low voltage electrical appliances industry and household appliance industry. It is a new type of electrical contact material without silver and cadmium pollution. This material is also widely used in the field of weak current contacts . 2. Background technology [0002] Under the existing technical conditions, the manufacturing materials of electrical contact elements are mainly silver-based electrical contact materials, and copper-based electrical contact materials are used as supplements. [0003] 1. Silver-based electrical contact materials [0004] The main silver-based electrical contact materials include: silver-oxide, silver-based pseudo-alloy, and silver-based allo...

AI Technical Summary

Problems solved by technology

Although these schemes have effectively improved the electrical and mechanical properties of copper-based materials, they still have not achieved the optimal combination of contact material oxidation resistance, welding resistance, electrical ablation resistance and mechanical properties, performance and silver-based materials There is still a small difference compared to

Therefore, the application range of copper-based materials is limited, and its popularization and application are affected.