Tribological characteristics of CrCN coatings at elevated temperature

Dry sliding wear experiments at specific temperatures ranging from 20 to 500 °C were conducted on CrCN coatings deposited onto steel substrates. The coatings were worn against 100Cr6 bearing steel balls, Si3N4 and Al2O3 balls, using a pin-on-disc sliding configuration at a contact load of 5 N. Friction coefficient and coating wear rates were measured, and wear tracks were analysed using SEM equipped with EDX. Coatings exhibited good wear performance and unexpected behaviour at elevated temperatures.