Experimental investigation of wear behaviors of bronze and carbon-reinforced polytetrafluoroethylene alloy pivot pin bearings

Abstract

Due to their superior features, such as low coefficients of friction, resistance against chemical effects, and good strength-to-weight ratio, polymer-based composite bearings are widely used in industries. Polymer composite bearing calculations are made based on experimental study data. In this study, experimental investigations were conducted on polytetrafluoroethylene composite radial bearings reinforced with 35% carbon and 40% bronze material where bearing loads, sliding distances, and wear were taken into consideration. The results for both materials are given graphically and compared with each other. In accordance with the results, it was considered that polytetrafluoroethylene/bronze composite film thickness and film composition on the surfaces extensively affect wear rate. It was found that these films' thicknesses depends on adhesion between steel and composite surfaces, cohesive properties of composite, load, and sliding distance.