Research on high temperature wear resistance mechanism of CrN/CrAlN multilayer coatings

In this paper, a 16 mu m CrN/CrAlN multilayer coating is prepared on the titanium alloy surface via arc ion plating. Since titanium alloys are susceptible to wear in a high-temperature environment, high-temperature wear performance and mechanism after coating are investigated. The results show that the friction coefficient of the CrN/CrAlN multilayer coating decreases with an increase in temperature during wear tests at room temperature, 300 degrees C, 500 degrees C, and 700 degrees C. Moreover, the friction coefficient decreases from 0.9 at room temperature to 0.4 at 700 degrees C. The wear rate increases with the temperature, more specifically from 1.32 x 10(-5) mm(3)/(N.m) at room temperature to 6.45 x 10(-5) mm(3)/(N.m) at 700 degrees C.