Propriétés mécaniques de tribofilms formés dans un contact frottant CuDLC / acier

Translated title of the contribution: Mechanical properties of tribofilms formed in a CuDLC / steel rubbing contact

S. Bec, J. Fontaine, M. Belin, Takanori Takeno, Hiroyuki Miki

Research output: Contribution to journalArticlepeer-review

Abstract

Diamond-Like Carbon (DLC) coatings are used to obtain low friction and low wear in dry rubbing contacts. Electrical properties of the contact can be controlled by designing metal/DLC nanocomposite. In this study, mechanical properties of rubbed surfaces were investigated after linear reciprocating friction tests where a steel ball is rubbed onto a Cu/DLC nanocomposite plane. It was observed that a tribofilm might grow depending on the test conditions, due to material exchanges between the two contacting solids during friction. And it was possible to correlate the evolution of friction coefficient and contact electrical resistivity with the build-up of a tribofilm on the steel ball. When a tribofilm is formed, it is conductive and the wear of the coating progresses slowly. However, the friction coefficient value is not constant versus time. In order to better understand the origin of these variations, the mechanical properties of the tribofilm and the coating were measured at different tribotest durations, inside and outside the wear track. The mechanical properties of the tribofilm were found to be different from those of the initial rubbing material and some correlation could be done with the evolution of the friction coefficient.

Translated title of the contributionMechanical properties of tribofilms formed in a CuDLC / steel rubbing contact
Original languageFrench
Article number2013074
JournalMateriaux et Techniques
Volume101
Issue number3
DOIs
Publication statusPublished - 2013 Oct 1

Keywords

  • Diamond-Like Carbon
  • Hardness
  • Nanocomposite layers
  • Tribofilm
  • Tribological behaviour
  • Young's modulus

ASJC Scopus subject areas

  • Materials Science(all)

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