AbstractThe friction and wear characteristics of PTFE and one of its composites, JS material rubbing against stainless steel, were determined with a pin‐disk tester in this study. The JS material is a multilayer composite composed of PTFE layer containing metal oxide and others, porous bronze layer, copper‐plating layer and steel back. The submicroscopic features of frictional surfaces of stainless steel and JS materials were observed with an electron probe microanalyzer (EPM). By analysis of fractional surfaces of stainless steel pins in various operating stages with X‐ray photoelectron spectroscopy (XPS), chemical shifts of Cls, Ols, and Flspeaks, F‐ion gathering in surface transfer films, and generation of a metal fluoride and an unknown compound containing oxygen were found. The determination of JS material wear debris with electron spin resonance spectroscopy (ESR) showed that polymeric radicals different in structure and stable in air existed. The authors consider that these PTFE molecule structure variations might be of benefit to the adhesion of PTFE transfer film to the rubbed stainless steel surface, which is important to improve the friction and wear performance
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