Journal
SURFACE & COATINGS TECHNOLOGY
Volume 283, Issue -, Pages 96-100Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2015.10.033
Keywords
Tungsten carbide doped diamond-like carbon coatings; Wear; Rolling contact
Funding
- Timken Company
- University of Akron Research Foundation
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The focus of this research was to evaluate the resistance of a WC/a-C:H coating to micropitting damage in rolling/sliding boundary lubricated contacts. Experiments were conducted on uncoated discs and coated rollers in a three-disc-on-roller tribometer. Contributions of surface roughness, slide-to-roll ratio, and substrate hardness on coating performance were studied. Observations gleaned from the experimental results include that the coating on a super-finished roller can withstand contact stresses as high as 1.7 GPa in extreme boundary lubrication and nominally pure rolling with no measurable wear. Roughness of the coated component plays a crucial role in coating performance, as well as in the wear on the uncoated counterpart. (C) 2015 Elsevier B.V. All rights reserved.
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