This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of Tribological Performance of Ceramic Roller Followers
Annotation ability available
Sector:
Language:
English
Abstract
Tribological properties of three different ceramic materials i.e., reacted silicon nitride, pressureless sintered silicon nitride and alumina-titanium carbide composites were investigated as cam roller followers using a motorized valve train apparatus. One pair of each ceramic rollers and one pair of 52100 steel rollers were tested against a nodular cast iron camshaft. The contact areas were lubricated by a jet of mineral oil at 88°C. The tests were conducted at camshaft speeds of 250 and 3000 r.p.m which approximate idling and rated operating speeds of an engine.
The experiments were conducted for a period of 900 hours. At the end of each 100 hours of testing, the wear on the cam lobes and the ceramic rollers were measured. Also replicas were taken from the worn surfaces of ceramic rollers, steel rollers and cam lobes and examined under scanning electron microscope to record the progression of surface damage and the wear mechanisms were identified. It was concluded that ceramics can be used as an alternative cam roller follower materials.
Authors
Citation
Gangopadhyay, A., Cheng, H., Harman, S., and Corwin, J., "Evaluation of Tribological Performance of Ceramic Roller Followers," SAE Technical Paper 900401, 1990, https://doi.org/10.4271/900401.Also In
References
- Libsch T.A. Becher P.C. Rhee S.K. “Dry Friction and Wear of Toughened Zirconias and Toughened Aluminas Against Steel” Wear 110 263 283 1986
- Cranmer D.C. “Friction and Wear Properties of Monolithic Silicon Based Ceramics” J. Mat. Sci. 20 2029 2037 1985
- Breznak J. Breval E. MacMillan N.H. “Sliding Friction and Wear of Structural Ceramics” J. Mat. Sci. 20 4657 4680 1985
- Ishigaki H. Kawaguchi I. Iwasa M. Toibana Y. “Friction and Wear of Hot Pressed Silicon Nitride and Other Ceramics” Trans ASME 108 514 521 1986
- Miyoshi K. Buckley D.H. “Friction and Fracture of Single Crystal Silicon Carbide in Contact With Itself and Titanium” ASLE Trans 22 146 153 1979
- Mehan R.L. Hayden S.C. “Friction and Wear of Diamond Materials and Other Ceramics Against Steel” Wear 74 195 212 1981-82
- Eyre T.S. Crawley B. “Camshaft and Cam Roller Follower Materials” Trib. International August 147 152 1980