Abstract
The Co-Ti(3)SiC(2 & nbsp;)coating with Ni-based interlayer has been manufactured on copper alloy via laser cladding. The effect of Ti(3)SiC(2)doping on the microstructure, microhardness and tribological behavior of Co-based coating is investigated. Results revealed that the microhardness of the Co-based coating increased from 426.22 HV0.2 to 524.40 HV0.2 with the increase of Ti(3)SiC(2 & nbsp;)content due to the solid solution strengthening of gamma-Co and second phase strengthening of Cr23C6, SiC and TiC. The Co-10 wt% Ti(3)SiC(2 & nbsp;)coating has the lowest mean friction coef-ficient of 0.356 and wear rate of 0.16 x 10(-5) mm(3)/(N.m) at 600 ?. The addition of 20 wt% Ti3SiC2 deteriorates the anti-wear properties of the Co-based coating and causes the largest mean friction coefficient of 0.47 and wear rate of 10.26 x 10-5 mm(3)/(N & BULL;m) at 600 ?.

Keywords Plus：HIGH-TEMPERATURE WEARCOMPOSITE COATINGSMICROSTRUCTUREPERFORMANCEBEHAVIORTI6AL4VSURFACERESISTANCESTEELCU

Published in TRIBOLOGY INTERNATIONAL，Volume171；10.1016/j.triboint.2022.107549，JUL 2022