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Performance of Ceramics in Ring/Cylinder Applications
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English
Abstract
In support of the efforts to apply ceramics to advanced heat engines, a study is being performed of the performance of ceramics at the ring/cylinder interface of advanced (low heat rejection) engines. The objective of the study, managed by the Oak Ridge National Laboratory, is to understand the basic mechanisms controlling the wear of ceramics and thereby identify means for applying ceramics effectively. Attempts to operate three different zirconias, silicon carbide, silicon nitride, and plasma-sprayed ceramic coatings without lubrication have not been successful because of excessive friction and high wear rates. Silicon carbide and silicon nitride perform well at ambient temperatures with fully formulated mineral oil lubrication, but are limited to temperatures of 500 F because of the lack of suitable liquid lubricants for higher temperatures. Wear is confined to surface polishing during conditions of successful operation. The zirconias encounter high wear rates at room temperature even in the presence of liquid lubricants because of thermal-shock-induced surface cracking. The low thermal diffusivity of zirconia allows local areas to heat excessively from friction. The periodic heating induces thermal shock cracks and subsequent spalling. The studies are continuing with evaluations of plasma sprayed ceramic coatings with liquid lubricants.
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Citation
Dufrane, K. and Glaeser, W., "Performance of Ceramics in Ring/Cylinder Applications," SAE Technical Paper 870416, 1987, https://doi.org/10.4271/870416.Also In
References
- Radovanovic, R. Kamo, R. Dufrane, K. “Tribological investigations for an insulated Diesel Engine” SAE Paper 830319 1983
- Toyasna, K. et.al. “Heat insulated Turbo-compound Engine” SAE Paper 831315 1983
- Shimauchi, T. et.al. “Tribology at High Temperature for Uncooled Heat insulated Engine” SAE Paper 840429 1984
- Dow, T. A. Burton, R. A. “The Role of Wear in the initiation of Thermoelastic Instabilities of Rubbing Contact” Journal of Lubrication Technology, Trans. ASHE, Series F 95 1 71 75 1973
- Dow, T. A. Stockwell, R. D. “Experimental Verification of Thermoelastic Instabilities in Sliding Contact” Journal of Lubrication Technology, Trans. ASME, Series F. 99 3 359 364 1977
- Sibley, L. B. Allen, C. M. “Friction and Wear Behavior of Refractory Materials at High Sliding Velocities and Temperatures” Wear 5 1962 312 329