Preparing method for silver plating graphene enhanced copper-based electric contact material

Abstract

The invention relates to a copper-based electric contact material used in a middle-low-voltage electric appliance switch, in particular to a preparing method for a silver plating graphene enhanced copper-based electric contact composite material. The copper-based composite material comprises, 0.5 wt.%-4 wt.% of bismuth, 0.05 wt.%-0.5 wt.% of yttrium, 0.1 wt.%-0.5 wt.% of graphene (silver plating), 1wt.%-5wt. / % of silver and the balance copper and other inevitable impurities. Copper-yttrium alloy powder is prepared and subjected to chemical silver plating, the copper-yttrium alloy powder and graphene subjected to silver plating treatment are subjected to ball milling and mixed evenly, and the electric contact material is finally prepared through pressing and sintering. The surface of copper powder is subjected to silver plating so that the anti-oxidation performance of the material can be improved, the graphene is subjected to silver plating treatment so that combination between the graphene and a copper base body can be enhanced, and therefore the comprehensive performance of the material is improved, and the copper-based electric contact material good in electric conductivity, resistant to electric arc erosion and excellent in welding resistance is finally obtained.

Description

technical field [0001] The invention relates to a copper-based electrical contact composite material for medium and low-voltage electrical switches, in particular to a method for preparing a silver-plated graphene-reinforced copper-based electrical contact composite material. Background technique [0002] Electrical contact materials play a vital role in electrical switches, and they play an important role in the service life of electrical appliances, including the stability and reliability of the entire system. In order to ensure the reliability and service life of electrical contact materials, the electrical contact materials of high-quality electrical appliances are mostly made of metal silver-based electrical contact materials, and the silver content of these metal silver-based electrical contact materials is 85wt.%~95wt .%, so almost a quarter of the world's silver production is needed to make the required electrical contact elements. At the same time, because the annu...

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Problems solved by technology

Literature [Preparation and Performance Research of Graphene Reinforced Copper-based Composite Materials] studied the influence of graphene on copper-based composite materials. Since the surface treatment of graphene was not carried out, the interface between graphene and copper matrix was poor, except In addition to the increase in hardness, the conductivity, density and other properties are reduced

Patent application [CN105603247A] discloses a graphene-reinforced copper-rare-earth-based electrical contact material and its preparation method. The graphene-reinforced copper-based electrical contact is used. Since the surface treatment of graphene is not carried out, it is difficult to solve the problem of its contact with the copper substrate. The problem of poor interface integration

Patent application [CN105609159A] discloses a copper-coated graphene-reinforced copper-based electrical contact material and its preparation method. The graphene is copper-plated by magnetron sputtering, but the cost of magnetron sputtering is high and it is difficult to scale production, and there are problems of uneven coating and poor bonding