Friction Behavior of Plasma Sprayed Tungsten Carbide Coatings

The coefficient of static friction of friction pairs, which were composed of plasma sprayed tungsten carbide coating and aluminium alloy, titanium alloy and plasma sprayed titanium coatings, respectively, were examined. The results obtained show that surface roughness and hardness of friction pairs are important to the coefficient of static friction. The lower the hardness of contact material against WC coating, the higher the static friction coefficient of a pair. The roughening WC coating and the smoothing pair material against WC are useful for improving the static friction coefficient of the wear pair.