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HUANG Li, YANG Ru, GUO Jiangjiang, et al. FRICTION AND WARE PROPERTIES OF PTFE-BASED COMPOSITES FILLED WITH MICRON AND NANOMETER SiO2 PARTICLES[J]. Acta Materiae Compositae Sinica, 2004, 21(4): 82-86.
Citation: HUANG Li, YANG Ru, GUO Jiangjiang, et al. FRICTION AND WARE PROPERTIES OF PTFE-BASED COMPOSITES FILLED WITH MICRON AND NANOMETER SiO2 PARTICLES[J]. Acta Materiae Compositae Sinica, 2004, 21(4): 82-86.
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FRICTION AND WARE PROPERTIES OF PTFE-BASED COMPOSITES FILLED WITH MICRON AND NANOMETER SiO2 PARTICLES

  • 1.

    School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;

  • 2.

    The Key Laboratory of Science and Technology of Controllable Chemical Reactions,Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

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  • Received Date: April 06, 2003
  • Revised Date: January 09, 2004
    Abstract
  • The effects of polytetrafluoroethylene (PTFE) -based composites filled with nanosized SiO2 and micronsized SiO2 on friction and wear properties were investigated. The friction coefficient, wear rate and crystallinity were measured. The friction surface was observed by scanning electron microscopy (SEM). The results show that the addition of the silica micron-particles or nano-particles and surface treatment not only increases the friction coefficient of PTFE-based composites, but also results in largely decreasing the wear rate of SiO2/PTFE composites. When the filler mass fraction is lower than 6%, the wear rate of the SiO2/PTFE composites filled with untreated nanosized SiO2 falls 98.5%, while the wear rate trends to be stable after the filler mass fraction is higher than 6%. However, adding 6% of nanosized SiO2, the friction coefficient of SiO2/PTFE composites is only elevated from 0.1 of the pure PTFE to 0.12. The friction coefficient of SiO2/PTFE composites filled with nanosized SiO2 treated by coupling agent is improved to the smallest elevation.
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