Affiliation:
1. Nanjing University of Technology
2. Northeast Petroleum University
Abstract
The tribological and mechanical properties of polytetrafluoroethylene (PTFE)
composites filled with carbon nano-fiber (CNF), short carbon fiber (SCF) and the combination of
them were studied. The results indicate that the wear volume loss of the PTFE composite filled
with CNF or SCF, in comparison with that of pure PTFE, decreases by 1~2 orders of magnitude.
And the best wear resistant composition is achieved by the combination of SCF with CNF; as an
example, PTFE+2 wt% CNF+18 wt% SCF exhibits a specific wear volume loss of 0.88 mm3,
which is about 11 times lower when compared to the PTFE composite filled with 18 wt% SCF.
Meanwhile, the results also show that the tensile strength of SCF or CNF filled PTFE composites
is better than that of pure PTFE. However, the combination of the two fillers decreases the
tensile strength of PTFE composites. Worn surfaces were investigated using a scanning electron
microscope, from which it is assumed that a mechanism of rolling effect, due to the filling of
nanoparticles, which has a positive protective effect for PTFE matrix.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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