Friction Characteristics of CNx Coated Dimple Pattern with Hexagonal Array

ABSTRACT − In this study, we examined the friction characteristics of a dimple pattern on a carbon nitride coating. The study was conducted with a hexagonal array 40 µm dimple pattern on a steel bearing containing a CNx coating. The area density of the dimple patterns were varied between 5 % and 25%, the speed was varied from 0.06-0.26 m/s, and the load was varied between 20-100N. In general, we found that as the velocity increased, the friction coefficient increased. Furthermore, the friction coefficient was lowest at a load of 40N. The friction coefficient of the non-coated specimen was 0.025-0.15; on the other hand, the friction coefficient of the coated specimen was 0.002-0.02. Thus, we determined that the coated materials could reduce the friction coef-ficient by a factor of 7.5