Interface characteristics of textured composite solid lubricant coating to improve the tribological performance of TC4

For improving the tribological performance, the textured composite solid lubricant coating was prepared on the surface of Ti–6Al–4V (TC4). The effects of composite coating with different texture densities on the tribological properties of TC4 were studied. The results show that the coating improves the microhardness of TC4 surface, and appropriate texture density effectively suppresses the stress of contact interface so that the average friction coefficient of TC4-based composite solid lubricant coating with 25% wavy texture density sample (TCWs-SW25) is 50.24% lower than that of TC4, and the average wear loss is reduced by 97.66%. The enhancement of contact interface performance comes from the transfer effect of lubricants to reduce the number of interfacial asperities, thereby improves the friction and wear properties and inhibits vibration and noise of TC4.