Lubrication improvement and friction reduction of DLC-coated sliding surfaces by in-process structuring and post polishing

P. Andersson, J. Koskinen, S. Varjus, J. Kolehmainen, S. Tervakangas, W. Buss

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The paper describes an experimental investigation on the influence of the surface roughness of diamond-like hard carbon (DLC) coatings on the friction and wear in sliding contact against steel under conditions of starving lubrication. Experimental studies employed a reciprocating ball-on-fiat tribometer in two different modes of operation. The study showed a microlubrication effect in terms of lubrication assistance achieved by microscopic cavities in the topography of a DLC coating and good sliding behaviour even in the case of starving oil lubrication. Post-process polishing of the coated surfaces was adopted for eliminating unnecessary friction losses due to asperity interactions and micro-abrasive wear.

Original languageEnglish
Pages (from-to)97-112
Number of pages16
JournalTriboTest Journal
Volume14
Issue number2
DOIs
Publication statusPublished - Apr 2008
MoE publication typeA1 Journal article-refereed

Keywords

  • DLC
  • Friction
  • Micro-lubrication
  • Wear

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