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

Paranjayee Mandal, Arutiun Ehiasarian, Papken Hovsepian

Research output: Contribution to journalArticle

9 Citations (Scopus)

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 m3N-1m-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.
Original languageEnglish
Pages (from-to)135-147
Number of pages13
JournalTribology International
Volume90
Early online date21 Apr 2015
DOIs
Publication statusPublished - 31 Oct 2015
Externally publishedYes

Keywords

  • sliding friction
  • third-body abrasion
  • wear
  • Raman spectroscopy

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