High strength tin based overlay for medium and high speed diesel engine bearing tribological applications
Abstract Tin based materials are often used as lead free overlay for half shell bearings in medium and high speed diesel engines for their high resistance to cavitation and corrosion damages and excellent conformability and embeddability for engine tribological applications. Tin based overlay also offers reasonable fatigue resistance but in order to satisfy the more and more exigent demand of future engine developments especially those fired by natural gases to minimize emissions, a multilayer tin copper overlay system is herein proposed to overcome the structural weaknesses of traditional monolayer tin copper overlay therefore provide enhanced tribological performances.