Published online by Cambridge University Press: 28 February 2011
Wear tests were performed under ultra high vacuum conditions in a ball-onflat configuration on magnetron sputtered and triode sputtered MoS2 films on 440C steel substrates. The issue of material loss versus deformation of the film was investigated using energy dispersive x-ray microanalyses for mass loss determinations and Michelson interferometry to measure the deformation of the tracks. Significant deformation without material loss was found in the first 10 passes. Surface composition of the tracks and the transfer film on the ball was determined by Auger electron spectroscopy. The S/Mo ratio wasfound to increase and the O/Mo ratio was found to decrease with increased sliding distance.