Friction and wear properties of TiC–Al2O3 composite and Al2O3/TiC layered coatings

The measurement of wear, the coefficient of static and dynamic friction and the hardness of TiC–Al2O3, and Al2O3/TiC coatings deposited on stainless steel and TiC precoated stainless steel substrates are reported. The results of the studies are compared with similar studies on TiC coatings deposited by the activated reactive evaporation (ARE) process. It has been found that the wear in both types of TiC–Al2O3 and Al2O3/TiC coatings is a sum total of abrasive and adhesive contributions. The values of the coefficients of friction are higher compared to stainless steel TiC ARE wear couple.