Friction and wear of self-lubricating TiN-MoS{sub 2} coatings produced by chemical vapor deposition
- Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.
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-6Al-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 20--700 C in air, are described. The initial sliding friction coefficients for the composite coatings at room temperature were 0.07--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 temperate 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 161534
- Report Number(s):
- CONF-941296-1-Rev.; ON: DE96003044; TRN: AHC29601%%89
- Resource Relation:
- Conference: Effect of surface coatings and treatment on wear, Philadelphia, PA (United States), 7-8 Dec 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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