Studies On The Tiny Particle Reinforced Copper Coating By Electro-brush Plating

To make the equipments meet the service requirement, the electro-brush plating technology has been developed from the single coating, to the composite coating and to the tiny particle composite coating. The tiny particle composite electro-brush plating technology is used for preparing the composite coating with distinctive anti-wear performance.The microstructure of the Cu-SiC particle composite electro-brush coating was studied through SEM, EDS and optical microscope. And the optimum technique parameters of preparing thick copper were confirmed in this paper. Base on the prophase experiment, we discussed the effect of particle concentration in solution, current density temperature on the SiC content and anti-wear properties of the composite coating. The results show that the current density strongly affects the particle content in composite coating and the following factors are particle concentration in solution and temperature subsequently. Based on the above conclusion, we established the superlative technological parameters of preparing Cu-SiC particle composite electro-brush coating. It is that the concentration of SiC particle in solution was 25g/L; current density was 1.0 A/dm2.under such conditions, the content of SiC in composite coating was 5.96vol%, together with fine, compact, smooth surface, its thickness was over 0.15mm.The studies on wearability and wear mechanism of Cu-SiC composite electro-brush plating were done. The results showed that SiC particles were dispersed in the coating which proved high hardness and excellent wearability. they also indicated that the process of the adhere wear and the particle wear mechanism. Compared with the general Cu-plating coating, high hardness of dispersed SiC particles in the composite coating reduced the materials adhesion.