Tribological behaviour of Mo–W doped carbon-based coating at ambient condition

MANDAL, Paranjayee, EHIASARIAN, Arutiun and HOVSEPIAN, Papken Eh. (2015). Tribological behaviour of Mo–W doped carbon-based coating at ambient condition. Tribology International, 90, 135-147.

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Official URL: http://dx.doi.org/10.1016/j.triboint.2015.04.017
Link to published version:: 10.1016/j.triboint.2015.04.017

Abstract

Poor adhesion strength and low thermal stability often restrict the tribological applications of the state-of-the-art diamond-like-carbon coatings in automotive industry. A novel carbon-based coating doped with molybdenum and tungsten (Mo–W–C) is deposited using the advantages of HIPIMS to overcome these limitations and to provide enhanced tribological performance. Low friction (µ=0.335 against steel counterpart) and high wear resistance (Kc=3.87×10−16 m3 N−1 m−1) are observed after 7.5 km sliding distance and the coating remains intact within the wear track after sliding. It is concluded that the tribological performance of Mo–W–C coating at ambient condition excels due to its dense microstructure, interfacial adhesion strength and in-situ formation of solid lubricants such as graphitic carbon particles, MoO3 and Magnéli phase oxides of molybdenum and tungsten in the transfer layer during sliding.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1016/j.triboint.2015.04.017
Depositing User: Carmel House
Date Deposited: 28 Jul 2016 13:27
Last Modified: 28 Jul 2016 13:27
URI: http://shura.shu.ac.uk/id/eprint/12906

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