Sliding Wear Properties of n-Al_2O_3/Ni Electro-Brush Plating Composite Coating

In order to improve the wear resistance in abrasive-contaminating lubricant, the n-Al 2O 3/Ni brush plating composite coating was prepared. The surface and cross-section morphologies of the composite coating and the distribution of the nano-particles in the coating were observed by SEM. The GCr15 steel was adopted as the counterpart to compare the wear properties of the composite coating, high speed nickel coating and 45 steel. The morphology and chemical characteristics of the worn surface were analyzed. The results show that with the nano-particles added to the coating, the microstructure, the bond with matrix and hardness of the composite coating are improved. The weight loss increases linearly with sliding time in abrasive contaminting lubricant. The friction coefficient and weight loss of the composite coating are less than those of the high speed nickel coating and 45 steel.