Research on Micro-Abrasion Performances of TiN Coating in Simulated Body Fluid

Abstract

An abrasive wear test, based on the ball-crater technique, has been used to evaluate the abrasive wear resistance of TiN coatings in Hank’s solution. Microhardness measurements and scratch tests were carried out to characterize the mechanical properties of TiN coating under investigation. The influence of load, sliding distance and slurry concentration on wear volume was studied. Based on the surface analysis, the mechanism of micro-scale abrasive wear was also discussed. The results showed that the wear volume of TiN coatings was gradually increased with the increase of load, sliding distance and slurry concentration,and the wear volumes of TiN coatings were remarkably smaller than those of Ti6Al4V alloy in Hank’s solution. As the load was increased, there was a transition of wear mechanism from mixed abrasion or three-body abrasion to two-body abrasion, however, the wear mechanism was transformed from two-body abrasion to mixed abrasion or three-body abrasion when slurry concentration and sliding distance were increased.