Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9679575 | Wear | 2005 | 9 Pages |
Abstract
This work reports on the structural and wear properties of MoxSy-Ti films, deposited on D2, 52100, and 440C steel substrates by pulsed-dc magnetron sputtering. A closed field unbalanced magnetron sputter ion plating system was used for the deposition process. The mechanical and tribological properties of MoxSy-Ti coated composites onto selected steel substrates were characterized using microhardness test, friction-wear test in atmospheric conditions and in dry nitrogen. The X-ray diffraction (XRD) was used to determine the phase structure. Structural analysis was performed using SEM-EDS. MoxSy-Ti films showed a very dense structure with pronounced basal plane (0Â 0Â 2) orientation, which showed the lowest friction coefficient (0.022) in dry nitrogen. The coefficient of friction can be attributed to the oxidation of MoS2 at the wear track to form MoOx that is known to cause an increase in the friction coefficient. In humid air, an oxidative environment, the films had higher coefficient of friction (0.07), and lower wear life (142Â 500 passes with 2.11Â ÃÂ 10â6Â mm3/NÂ m wear rate) than in dry nitrogen, where the wear life was over 250Â 000 passes with the lowest wear rate of 3Â ÃÂ 10â8Â mm3/NÂ m.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Ihsan Efeoglu, Ferhat Bulbul,