Friction and wear of self-lubricating TiN-MoS2 coatings produced by chemical vapor deposition

Peter J. Blau, Charles S. Yust, Yong W. Bae, Theodore M. Besmann, Woo Y. Lee

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The purpose of the work reported here was to develop special chemical vapor deposition (CVD) methods to produce self-lubricating ceramic coatings in which the lubricating and structural phases were co-deposited on Ti-6A1-4V alloy substrates. These novel composite coatings are based on a system containing titanium nitride and molybdenum disulfide. The method for producing these coatings and their sliding behavior against silicon nitride counterfaces, in the temperature range of 20 to 700°C in air, are described. The initial sliding friction coefficients for the composite coatings at room temperature were 0.07 to 0.30, but longer-term transitions to higher friction occurred, and specimen-to-specimen test variations suggested that further developments of the deposition process are required to assure repeatable friction and wear results. Friction and wear tests at 300 and 700°C produced encouraging results, but tests run at an intermediate temperature of 400°C exhibited friction coefficients of 1.0 or more. Oxidation and a change in the nature of the debris layers formed during sliding are believed to be responsible for this behavior.

Original languageEnglish
Pages (from-to)22-34
Number of pages13
JournalASTM Special Technical Publication
Volume1278
StatePublished - 1996

Keywords

  • Chemical vapor deposition
  • Friction properties
  • Molybdenum disulfide
  • Self-lubricating materials
  • Surface coatings
  • Surface treatments
  • Titanium nitride
  • Wear testing

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