EFFECT OF NANOPARTICLE CONTENT ON TRIBOLOGICAL PROPERTIES OF ELECTROBRUSH PLATED COMPOSITE COATING IN OIL CONTAINING ABRASIVE CONTAMINANT

The effects of nano Al₂O₃ particle content in the electrolyte on the nanoparticle content, microstructure, hardness and wear resistance of the composite coating were studied. The results show that the microstructure and hardness of the composite coating are improved with the increase of the nano-particles in the electrolyte， and the wear resistance of nanocomposite coating is 80% higher than that of high speed nickel coating. The nano-composite coating has the best wear resistance when the nano-particle content in the electrolyte is 20 g/L, above which the wear resistance decreases.