2010•China PlasticsRequires access

Effect of Surface Treatment of SiC Nano-particles on Properties of PTFE/Nano SiC Composites

Ding Lan-ying

Abstract

The mechanical and tribological properties of polytetrafluoroethylene(PTFE) composites filled with nano-SiC were studied.The effects of content and surface treatment of nano-SiC on the mechanical,friction,and wear properties of PTFE/nano SiC composites were investigated.The tensile fracture surfaces were observed by a scanning electron microscope(SEM).The strengthening mechanism for the composites was explored.It showed that the untreated nano-SiC increased the hardness and wear resistance of PTFE/nano SiC composites in varying degrees.The tensile strength,impact strength,and friction properties of the composites were further improved with nano-SiC being treated with a coupling agent.The surface treatment of nano-SiC resulted in a better interface combination with PTFE matrix and thus a finer dispersion.

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Key concepts: Materials science, Composite material, Polytetrafluoroethylene, Ultimate tensile strength, Scanning electron microscope, Nano-, Tribology, Dispersion (optics)