Scratch resistance and tribological properties of DLC coatings under dry and lubrication conditions

Neha Sharma, N. Kumar, S. Dash, C. R. Das, R. V. Subba Rao, A. K. Tyagi, Baldev Raj

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Scratch resistance and tribological properties of hydrogenated and hydrogen free diamond like carbon (DLC) coatings were investigated in ambient atmosphere under unlubricated and lubricated conditions using layers of oleic (C18H34O2) and linoleic acid (C18H32O2). Scratch resistance property improved in hydrogenated DLC while using linoelic and oleic acids compared to unlubricated condition. Coefficient of friction (CoF) was found to decrease under ambient dry conditions, while under lubrication condition, it was found to increase with normal load. At low load of 1 N. hydrogenated and hydrogen-free coatings show a super low CoF of 0.001 and high wear resistance with oleic acid. (C) 2012 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalTribology International
Volume56
Pages (from-to)129-140
ISSN0301-679X
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • DLC coatings
  • Fatty acid
  • Scratch resistance
  • Friction coefficient

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