Impact of pv Values on the Friction and Wear Performance of Blended Fiber Composite Materials

Conversely, the Kevlar/PTFE blended fiber composite material shows a higher wear volume, with wear primarily driven by fatigue wear. At a pv value of 4.8 MPa·m/s, both materials are predominantly subject to abrasive wear; however, the GF/PTFE blended fiber composite material experiences more severe surface damage and a higher wear volume. Microscopic analysis, conducted using an optical microscope, scanning electron microscope (SEM), and energy-dispersive spectrometer (EDS), of the initial and worn surface morphology, debris, transfer film, and elemental distribution, revealed that at a pv value of 4.8 MPa·m/s, there is a significant increase in the content of fluorine (F) elements within the wear track area, which is more uniformly distributed, contributing to a more continuous formation of the transfer film on the rubbing surface.

Under conditions of a pv value of 2.4 MPa·m/s, the performance of the GF/PTFE blended fiber composite material is superior to that of the Kevlar/PTFE blended fiber composite material. In contrast, under conditions of a pv value of 4.8 MPa·m/s, the Kevlar/PTFE blended fiber composite material exhibits superior wear resistance.