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Diffusion Behavior of Overlay for Three Layers Engine Bearings
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English
Abstract
The diffusion phenomena of tin and indium which are contained in the lead-base overlay of 3-layer copper-lead alloy bearings were studied. Easier diffusion of tin compared with indium decreases the corrosion resistance of the overlay, and the tin reacts with the underlayer to form brittle Ni-Sn or Cu-Sn intermetallic compound, resulting in weak bonding strength.
Addition of copper into Pb-In overlay markedly restrains the diffusion of indium and therefore stabilizes the characteristics of corrosion resistance, bonding strength and mechanical properties for a long period. Cavitation tests, seizure tests and bearing fatigue tests were conducted on Pb-In-Cu overlay to study the feasibility of its application to actual engine bearings.
Authors
Citation
Sakamoto, M., Wada, M., and Ogita, Y., "Diffusion Behavior of Overlay for Three Layers Engine Bearings," SAE Technical Paper 890555, 1989, https://doi.org/10.4271/890555.Also In
References
- Wilson R.W. et al “The Corrosion of Overlay Bearings” Anticorrosion August 1970 P9
- Junge C.H. “Microstructure of Sleeve Bearing Materials” Metal Handbook 8th 7 1972 P231
- Pratt G.C. et al “Engine Bearing Overlay; The Effect of Overlay Composition on Diffusion and Post-Diffusion Bearing Performance” SAE Paper 830063 P3
- U.S. Pat. No. 4501154 “Method for Measuring on Adhesive Strength of a Multi-layer material” 1985
- Pratt G.C. “A Review of Sintered Metal Bearings: Their Production, Properties, and Performance” Powder Metallurgy 12 24 1969