Abstract
Work in the area of diamond deposition has been greatly intensified in the last 10 years. One of the most attractive subjects in the diamond applications field is the materials machining with diamond cutting tools that then requires a friction and wear study of diamond coatings. Generally, as-deposited diamond films have a high friction coefficient that leads to the high wear rates of the counter-material in sliding contact. Various treatments for the friction coefficient reduction have been proposed. In this paper, we present the effects of negative voltage application to the substrate during diamond deposition by combustion flame method. An increase of the growth rate and of the covered area is observed. Diamond coatings with {100} high orientation are deposed on a tungsten carbide substrate. In fact, the surface roughness is reduced and the obtained diamond coatings become smoother. The friction and wear properties of these diamond coatings are then studied. Results highlight the advantage of those coatings for friction and wear applications.
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