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.
Diffusion Behavior of Overlay for Three Layers Engine Bearings
Sae Technical Papers
SAE International Congress and Exposition ; 1989
1989-02-01
Conference paper
English
Diffusion behavior of overlay for three layers engine bearings
Automotive engineering | 1989
|Development of Engine Bearings with Solid Lubricant Overlay
British Library Conference Proceedings | 2001
|Studies on Lead-free Resin Overlay for Engine Bearings
SAE Technical Papers | 2006
|Studies on lead-free resin overlay for engine bearings
Automotive engineering | 2006
|Friction and Wear Reduction of Engine Bearings with Solid Lubricant Overlay
SAE Technical Papers | 2014
|