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Friction and Wear Properties of PTFE Composites Reinforced with Different Fillers

Chunxia He

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Abstract

The friction and wear properties of polytetrafluoroethylene(PTFE) composites filled with nano TiO_2/SiO_2 and glass fibre(GF) were investigated under different loads using the M-2000 tribometer.The worn surfaces of PTFE composites were analyzed by means of the scanning electric microscopy(SEM).The results show that the cooperation effect of nano materials and GF significantly improves the friction-changing and anti-wear properties of the composites.The PTFE composite filled with GF and nano TiO_2,whose wear mechanism is the abrasive attrition under lower load and fatigue wear under higher load,has better anti-wear property,its wear mass loss decreases 2 to 3 magnitudes;while the composite filled with GF and nano SiO_2,whose wear mechanism is the abrasive attrition under lower load and severe surface adhesion and slight cutting under higher load,has its friction coefficient close to PTFE.

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What this paper is about

The friction and wear properties of polytetrafluoroethylene(PTFE) composites filled with nano TiO_2/SiO_2 and glass fibre(GF) were investigated under different loads using the M-2000 tribometer.The worn surfaces of PTFE composites were analyzed by means of the scanning electric microscopy(SEM).The results show that the cooperation effect of nano materials and GF significantly improves the friction-changing and anti-wear properties of the composites.The PTFE composite filled with GF and nano TiO_2,whose wear mechanism is the abrasive attrition under lower load and fatigue wear under higher load,has better anti-wear property,its wear mass loss decreases 2 to 3 magnitudes;while the composite filled with GF and nano SiO_2,whose wear mechanism is the abrasive attrition under lower load and severe surface adhesion and slight cutting under higher load,has its friction coefficient close to PTFE.

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Available abstract

The friction and wear properties of polytetrafluoroethylene(PTFE) composites filled with nano TiO_2/SiO_2 and glass fibre(GF) were investigated under different loads using the M-2000 tribometer.The worn surfaces of PTFE composites were analyzed by means of the scanning electric microscopy(SEM).The results show that the cooperation effect of nano materials and GF significantly improves the friction-changing and anti-wear properties of the composites.The PTFE composite filled with GF and nano TiO_2,whose wear mechanism is the abrasive attrition under lower load and fatigue wear under higher load,has better anti-wear property,its wear mass loss decreases 2 to 3 magnitudes;while the composite filled with GF and nano SiO_2,whose wear mechanism is the abrasive attrition under lower load and severe surface adhesion and slight cutting under higher load,has its friction coefficient close to PTFE.

Key concepts: Materials science, Composite material, Abrasive, Tribometer, Polytetrafluoroethylene, Composite number, Attrition, Scanning electron microscope

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Friction and Wear Properties of PTFE Composites Reinforced with Different Fillers — Research Paper | ScholarLens