Optimization and tribological performance of PEEK based composite coatings reinforced with PTFE for friction pairs of aviation hydraulic pumps

In this study, polyetheretherketone (PEEK) based composite coatings reinforced with polytetrafluoroethylene (PTFE) were applied to copper-steel bimetallic plates. The impact of process parameters on the tribological properties of the coatings was investigated. The results indicated that the optimized PTFE/PEEK 2.2 coating exhibited commendable friction reduction and wear resistance performance when subjected to aviation kerosene lubrication. It was observed that the hot -pressing temperature has the most significant influence on the bearing capacity and wear rate of the coatings. In contrast, the hot -pressing pressure primarily affects the average friction coefficient. The primary wear mechanism observed in these coatings is adhesive wear. These findings suggest promising application prospects for the composite coatings in aviation hydraulic pumps, underscoring their potential to significantly improve overall performance.