Effect of temperature on the friction and wear behaviors of Cr3C2–20 wt% Ni cermets

Abstract

Friction and wear behaviors of Cr3C2–20 wt % Ni cermets against Al2O3 under dry sliding conditions in air were investigated at temperatures ranging from room temperature to 800 °C. The friction coefficient, wear rate, microstructure and wear mechanism of Cr3C2–20 wt % Ni cermets were researched using SEM, XPS and TEM in this study. Results indicated that the friction coefficient increased firstly with the increase of temperature from room temperature to 400 °C and then decreased rapidly with further increasing the temperature to 800 °C. The oxide products of Cr2O3 and NiO effectively decreased the friction coefficient at high temperatures. However, the oxide products were easily cracked and degenerated under the high compressive stress and shear stress, which aggravated the weight loss during the wear process.