2019•AIP AdvancesOpen access

Study on the reinforcing effect of nano-SiO2 filled PTFE composites

Yi Han, Bo Zheng, Jihong Chen, Qiang He

Abstract

The wear behavior and coefficient of friction for Nano-SiO2 filled polytetrafluoroethylene (PTFE) was investigated under dry conditions. The ball indentation hardness, tensile strength and elongation at break were determined. It was found that both ball indentation hardness and tensile properties were better reinforced by nano-SiO2 particles. The tribological properties of the nano-SiO2 PTFE composite and the regular SiO2 PTFE composite were compared for several applied loads. The worn surfaces were examined by means of scanning electron microscopy (SEM) and 3D profilometry. It was determined that the wear rate of PTFE composites filled with Nano-SiO2 particles considerably decreased. The friction forces were found to be lower for the Nano-SiO2 filled composites than those in the regular particles composite for the same experimental conditions.

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Key concepts: Materials science, Composite material, Polytetrafluoroethylene, Scanning electron microscope, Tribology, Ultimate tensile strength, Composite number, Indentation