The tribological properties of polytetrafluoroethylene (PTFE)/expanded graphite (EG) nanocomposites were evaluated on a pin-on-disk wear tester under dry conditions for the first time. Scanning electron microscopy (SEM) was used to examine worn surfaces and debris of the worn samples. The wear rate and coefficient of friction of 2 wt. % EG filled nanocomposite were reduced approximately 162 times and 38%, respectively. The significant decrease in wear rate was attributed to a thin and tenacious transfer film on the counter-surface. However, when 5 wt. % EG was filled into the PTFE/EG nanocomposite, the wear rate did not decrease further.
The Wear and Friction Behavior of Novel Polytetrafluoroethylene/Expanded Graphite Nanocomposites for Tribology Application
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 29, 2011; final manuscript received September 27, 2013; published online December 27, 2013. Assoc. Editor: Hong Liang.
Goyal, R. K., and Yadav, M. (December 27, 2013). "The Wear and Friction Behavior of Novel Polytetrafluoroethylene/Expanded Graphite Nanocomposites for Tribology Application." ASME. J. Tribol. April 2014; 136(2): 021601. https://doi.org/10.1115/1.4025655
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