Tribological mechanism of (Cr, V)N coating in the temperature range of 500?900?C

摘要

Aiming to study the influence of temperature on the wear mechanism, we fabricated (Cr, V)N coating by cathodic arc ion-plated and conducted tribological experiments at 500?900 ?C. The results indicated that there were two tribological behaviors, depending on the temperature. Below 600 ?C, the (Cr, V)N coatings exhibited a high friction coefficient, but generated a mild wear because of the slight oxidation. Above 700 ?C, the increased oxidation degree reduced adhesion of asperity contacts. However, the wear rate enhanced significantly with the temperature increasing from 700 to 900 ?C due to the fast oxidation accompanied by the decrease in both hardness and adhesion strength.