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Corresponding Author

Zaki, M.

Subject Area

Production Engineering and Mechanical Design

Article Type

Original Study

Abstract

The present paper deals with an experimental investigation carried out to elucidate the role played by polymeric and metallic fillers upon the coefficient of friction and wear rate of Polyoxymethylene (POM) and Polytetrafluoroethylene (PTFE).Lead bronze powder and PTFE powder were added by different percentages of volume to the base material to form a Composite. The study was performed on a pin-on-disk machine under constant load of 50 N and constant sliding speed of 1.0 m/s under dry sliding conditions. The results indicate that the addition of bronze or PTFE fillers always reduces the coefficients of friction and wear rates of tested materials and that reduction increases with the increase of filler content up to about 40%. The minimum valves of friction and wear were experienced by POM containing 36% PTFE. The paper attributes the reduction in friction and wear to the formation of polymeric transfer film adhering to the steel counterface which facilitates sliding and decreases adhesion.

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