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April 25, 2008
Publication of a scientific study by the faculty of IT-BHU
Chronicle Editor @ Apr 25, 2008

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First published on April 21, 2008
Journal of Reinforced Plastics and Composites 2008, doi:10.1177/0731684407086622
© 2008 SAGE Publications


Surface Studies of Centrifugally Cast Aluminum-based Lead Bearing Composites

S Mohan1*, J.P. Pathak1, N Chander2, and S Sakar3

1 Department of Metallurgical Engineering, Institute of Technology, Banaras Hindu University, Varanasi--221005(U.P.), India
2 School of Material Science & Technology, Institute of Technology, Banaras Hindu University, Varanasi--221005, India
3 Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela(Orissa), India


* To whom correspondence should be addressed.


Low cost and abundant availability of aluminum–based composites make them potential candidates for bearing applications. The dispersion of lead is difficult in aluminum, so a centrifugal casting procedure has been adopted for uniform dispersion. Cylindrical castings show minor variation in composition from outer to inner as well as from top to bottom. Wear rate shows an increasing trend with sliding distance and load. But with sliding velocity wear rate initially decreases, attains a minimum, and then increases sharply with increase in sliding velocity. Under dry sliding conditions all alloys exhibit two regimes of wear, viz. mild wear at low loads and sliding velocities but severe wear at higher loads and sliding velocities. These two wear mechanisms are distinguished by a mixed mode of oxidative and metallic wear dominated by either.

Key Words: centrifugal casting, wear rate, oxidative/mild wear, metallic/severe wear, ploughing and delamination.