Tribological behavior of plasma Mo–N surface modified Ti–6Al–4V alloy

A Mo–N surface modified layer on Ti–6Al–4V alloy was obtained using a plasma surface alloying technique. A comparison of the tribological behavior of untreated and plasma Mo–N modified Ti–6Al–4V alloy has been made in this study. Results show that the Mo–N modified layer with a single Mo2N phase significantly improves the tribological behavior of the treated Ti–6Al–4V alloy under oscillation sliding wear in ambient air. The Mo–N surface modified layer not only reduces the coefficient of friction, but also decreases the wear of Ti–6Al–4V alloy and prevents the first bodies from sticking at the contacting points.