Influence of processes of secondary structure formation on tribological behavior of composite coatings for sliding friction units

The paper deals with the processes that occur on surfaces of composite coatings of bronze-PTFE and carbon-glass fiber-epoxy resin compositions during their friction against a steel counterbody. Data on the morphology and roughness of their surfaces, as well as on their structure and composition, are obtained. The materials are studied through examination of laboratory specimens and a sliding bearing after its operation. Oxidation and secondary structure formation are found to affect changes in the friction coefficient.