Frictional behavior on wrinkle patterns of diamond-like carbon films on soft polymer

Authors
Kim, Seong JinYoon, Ju-IlMoon, Myoung-WoonLee, Kwang-Ryeol
Issue Date
2012-03
Publisher
ELSEVIER SCIENCE SA
Citation
DIAMOND AND RELATED MATERIALS, v.23, pp.61 - 65
Abstract
Frictional behaviors of wrinkle patterns on a diamond-like carbon (DLC) film coated on a soft polymer were investigated. Wrinkle patterns of the DLC layer were formed due to the large difference in elastic moduli between the DLC film and the soft polymer of polydimethylsiloxane (PDMS) as well as high residual compressive stress in the film. The roughness of wrinkled surfaces varied with the thickness of the DLC films, affecting the frictional behaviors. The coefficient of friction significantly reduced as the thickness of the DLC film increased. For lower thicknesses, slip-stick events and surface damages like fish-scales on the wear track were strongly developed. With an increase of sliding distance, a randomly oriented wrinkle pattern was getting worn on its top surfaces, resulting in an increase of the contact area as well as a coefficient of friction (COF). However, for thicker films simple wear was observed with the lower COF due to DLC nature. (C) 2012 Elsevier B.V. All rights reserved.
Keywords
TRIBOLOGICAL BEHAVIOR; THIN-FILMS; DLC FILM; SURFACE; COATINGS; WEAR; RUBBER; TRIBOLOGICAL BEHAVIOR; THIN-FILMS; DLC FILM; SURFACE; COATINGS; WEAR; RUBBER; Diamond-like carbon; Wrinkle; PDMS; Friction
ISSN
0925-9635
URI
https://pubs.kist.re.kr/handle/201004/129460
DOI
10.1016/j.diamond.2011.12.042
Appears in Collections:
KIST Article > 2012
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