Lead-free bearing alloys for engine applications

Details Lead-free bearing alloys for engine applications Lead-free bearing alloys for engine applications

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp1290...72r&link_type=abstract

In: Microgravity applications programme: Successful teaming of science and industry. Edited by Andrew Wilson, coordination: Benn

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Physical Sciences, Alloys

Scientific paper

Recent developments to reduce the fuel consumption, emission and air pollution, size and weight of engines for automotive, truck, ship propulsion and electrical power generation lead to temperature and load conditions within the engines that cannot be borne by conventional bearings. Presently, only costly multilayer bearings with electroplated or sputtered surface coatings can cope with the load/speed combinations required. Ecological considerations in recent years led to a ban by the European Commission on the use of lead in cars a problem for the standard bronze-lead bearing material. This MAP project is therefore developing an aluminium-based lead-free bearing material with sufficient hardness, wear and friction properties and good corrosion resistance. Only alloys made of components immiscible in the molten state can meet the demanding requirements. Space experimentation plays a crucial role in optimising the cast microstructure for such applications.

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