Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating

Paranjayee Mandal, Arutiun Ehiasarian, Papken Hovsepian

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The current research aims to discuss the tribological behaviour of Chromium-doped graphite-like carbon coatings and suggest a wear mechanism under both dry (in air) and boundary lubricated sliding condition based on phase composition of the wear product generated in wear track during pin-on-disc experiments. As expected, the friction coefficient reduces from 0.22 to 0.12 due to addition of lubricant. Raman analysis indicates that wear mechanism is oxidative in dry sliding condition whereas it is chemically reactive in the presence of lubricant. It is speculated that the key-factor of reduced friction and wear coefficient in lubricated condition is the formation of CrCl3 due to tribochemical reaction between coating and oil. CrCl3 has graphite-like layered structure; therefore it acts like solid lubricant.
Original languageEnglish
Pages (from-to)186-195
Number of pages10
JournalTribology International
Volume77
Early online date18 Apr 2014
DOIs
Publication statusPublished - 30 Sep 2014
Externally publishedYes

Keywords

  • wear
  • pin-on-disk
  • lubrication system

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    • 16 Citations
    • 1 Doctoral Thesis
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