Evaluation of F-doped WS2-C Thin Coatings Deposited by Magnetron Sputtering on Textured Al Surfaces to Improve the Friction Performance
(Room Room 104-B)
29 Apr 19
11:00 AM
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11:20 AM
Tracks:
Protective, Tribological and Decorative Coatings
The mechanical components’ assemblage relies on the use of lubricants. The tools used for lubricant application are often cleaned or replaced due to lubricant accumulation, which causes several breakdowns in the production line. Moreover, the excessive use of lubricants is nowadays a concern because of environmental and human risks. The solution is the development of functionalized surfaces addressing not only low friction, due to an improvement of the wear resistance, but also further special wettability properties. Then, this work presents two surface modification approaches such as the deposition of self-lubricating coatings based on TMDs, alloyed with C and F (WS2-C/F), these used in combination with textured anodized Al surfaces. WS2-C/F thin coatings with different F contents were deposited by magnetron sputtering in reactive mode. The coatings were deposited on glass, steel and on textured dimple-shaped Al alloy surfaces. The morphology, the chemical composition, structure and wettability of the coatings and hybrid structures were characterized as well as their tribological performance at room temperature in dry and lubricated conditions. The F incorporation led to the decrease of the surface roughness and to a better tribological performance. The textured Al surfaces provided with larger dimple yielded lower friction, mainly in lubricated condition.