Tribological, mechanical and thermal properties of fluorinated ethylene propylene filled with al-cu-cr quasicrystals, polytetrafluoroethylene, synthetic graphite and carbon black

Abstract

Antifriction hybrid fluorinated ethylene propylene-based composites filled with quasicrys-talline Al73 Cu11 Cr16 powder, polytetrafluoroethylene, synthetic graphite and carbon black were elaborated and investigated. Composite samples were formed by high-energy ball milling of ini-tial powders mixture with subsequent consolidation by injection molding. Thermal, mechanical, and tribological properties of the obtained composites were studied. It was found that composite containing 5 wt.% of Al73 Cu11 Cr16 quasicrystals and 2 wt.% of nanosized polytetrafluoroethylene has 50 times better wear resistance and a 1.5 times lower coefficient of dry friction comparing with unfilled fluorinated ethylene propylene. Addition of 15 wt.% of synthetic graphite to the above men-tioned composition allows to achieve an increase in thermal conductivity in 2.5 times comparing with unfilled fluorinated ethylene propylene, at that this composite kept excellent tribological properties.