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RESEARCH PAPERS

Retainer-Dependent Wear of Silicon Nitride Bearings at High Temperatures

[+] Author and Article Information
Y. Mutoh, K. Tanaka, M. Uenohara

Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka-shi 940-21, Japan

J. Tribol 116(3), 463-469 (Jul 01, 1994) (7 pages) doi:10.1115/1.2928866 History: Received January 27, 1993; Revised August 12, 1993; Online June 05, 2008

Abstract

Several retainer materials for high-temperature silicon nitride bearings to be used in air were examined with a high-temperature rolling three-ball tester. The “soft” or “self-lubricating” retainer materials (metal-bonded MoS2 -WS2 alloys, a carbon-carbon composite and graphite) tended to yield longer bearing life, lower silicon nitride wear rate and lower traction coefficients than the hard retainers (Fe-based sintered alloys, chromia and silicon nitride). The main problem in the use of the self-lubricating retainer materials was their rapid wear by tribo-oxidation at high temperatures.

Copyright © 1994 by The American Society of Mechanical Engineers
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