A study on the tribological behavior of hybrid PTFE/Kevlar fabric composites filled with nano-SiC and/or submicron-WS2 fillers

The tribological behaviors of hybrid PTFE/Kevlar fabric composites filled with nano-SiC and/or submicron-WS2 fillers were studied. Scanning electron microscopy and energy-dispersive X-ray spectrometer were used for analysis of the worn surface, transfer film, and debris of the PTFE/Kevlar fabric composites. In addition, the wear volume loss of the composite was measured by means of a laser microscopic 3D and profile measurement apparatus. The results indicate that although both single fillers and hybrid fillers can reduce the wear rate of composites, but hybrid fillers filled composites could achieve the desired comprehensive tribological properties in dry sliding. The improved tribological performance of filled composites can be attributed to two aspects: the formation of a thin and tenacious transfer film on the counter-surface, and the restrain the formation of larger debris. Tiny wear debris was easily trapped in the gap of a worn surface and can repair the damaged surface. In addition, the trapped debris could be considered as a secondary source of lubricant. POLYM. COMPOS., 37:2218-2226, 2016. (c) 2015 Society of Plastics Engineers