Fretting experiments of advanced polymeric coatings and the effect of transfer films on their tribological behavior
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The tribological performance of PTFE and PEEK-based polymeric coatings was evaluated under aggressive small amplitude reciprocating (fretting) conditions. Such a condition is encountered in modern machinery, including air-conditioning and refrigeration compressors. Unlubricated step load-to-failure experiments to determine their scuffing resistance have been performed. It was found that the tribological performance depends on the transfer film formed on the counterface. The PTFE coatings were able to form stable and continuous transfer films on the counterface and exhibited lower friction coefficient and wear without catastrophic failures. In the presence of liquid lubricant, the coatings showed worse performance than under dry conditions because the lubricant prevented the formation of transfer films on the counterface. © 2014 Elsevier Ltd.
author list (cited authors)
Yeo, S. M., & Polycarpou, A. A.