Tribological properties of carbonaceous coatings at high temperature

Many sliding machines are subject to high-temperature environments. Solid lubricating coatings are primarily used to control friction and wear in high temperature environments, where conventional liquid lubricants cannot provide lubrication function due to deterioration and oxidation at high temperature. Among solid lubricating coatings, carbonaceous coatings attract much attention because of their excellent mechanical propertiesand tribological properties, such as low friction, high hardness and high wear resistance. However, the high temperature tribolgical behaviors and mechanism of carbonaceous are still not clarified yet up to now. Consequently, in this study, a-C:H, Si-DLC, CNx, BCN, ta-C coatings were prepared and their thermal stability and high temperature tribological properties were investigated.