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Effects of oil absorption on the wear behaviors of carbon/epoxy woven composites

  • Lee, Jae-H. (School of Mechanical Engineering, College of Engineering, Kyung Hee University) ;
  • Lee, Jae-S. (School of Mechanical Engineering, College of Engineering, Kyung Hee University) ;
  • Rhee, Kyong-Y. (School of Mechanical Engineering, College of Engineering, Kyung Hee University)
  • Received : 2011.05.16
  • Accepted : 2011.06.21
  • Published : 2011.12.30

Abstract

Carbon/epoxy woven composites are prominent wear-resistant materials due to the strength, stiffness, and thermal conductivity of carbon fabric. In this study, the effect of oilabsorption on the wear behaviors of carbon/epoxy woven composites was investigated. Wear tests were performed on dry and fully oil-absorbed carbon/epoxy woven composites. The worn surfaces of the test specimens were examined via scanning electron microscopy to investigate the wear mechanisms of oil-absorbed carbon/epoxy woven composites. It was found that the oil absorption rate was 0.14% when the carbon/epoxy woven composites were fully saturated. In addition, the wear properties of the carbon/epoxy woven composites were found to be affected by oilabsorption. Specifically, the friction coefficients of dry and oil-absorbed carbon/epoxy woven composites were 0.25-0.30 and 0.55-0.6, respectively. The wear loss of the oilabsorbed carbon/epoxy woven composites was $3.52{\times}10^{-2}\;cm^3$, while that of the dry carbon/epoxy woven composites was $3.52{\times}10^{-2}\;cm^3$. SEM results revealed that the higher friction coefficient and wear loss of the oil-absorbed carbon/epoxy woven composites can be attributed to the existence of broken and randomly dispersed fibers due to the weak adhesion forces between the carbon fibers and the epoxy matrix.

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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