SYMPOSIA PAPER Published: 01 January 1996
STP16100S

Friction and Wear of Self-Lubricating TiN-MoS Coatings Produced by Chemical Vapor Deposition

Source

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 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.

Author Information

Blau, PJ
Oak Ridge National Laboratory, Oak Ridge, TN
Yust, CS
Oak Ridge National Laboratory, Oak Ridge, TN
Bae, YW
Oak Ridge National Laboratory, Oak Ridge, TN
Besmann, TM
Oak Ridge National Laboratory, Oak Ridge, TN
Lee, WY
Oak Ridge National Laboratory, Oak Ridge, TN
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Details
Developed by Committee: G02
Pages: 22–34
DOI: 10.1520/STP16100S
ISBN-EB: 978-0-8031-5333-2
ISBN-13: 978-0-8031-2036-5