The Effect of Carbon Fiber Orientation on Tribological Behavior of CarbonFiber/LCP Composites

摘要

This study added different weight percentage of carbon fibers in liquid crystal polymer (LCP), and prepared carbonfiber/LCP composites through injection molding. Focus of this study has been placed on the effect of carbon fiber orientationand weight percentage on the tribological behavior of carbon fiber/LCP composites. The experimental results showed that thefriction coefficients of the carbon fiber/LCP composites were much lower and more stable than that of pure LCP. As thesliding direction is parallel to the fiber axis, the longitudinal fiber would provide a higher wear resistance to the applied load,and the composites show the much better tribological properties. Nevertheless, as the weight percentage of carbon fibersincrease, more random fiber orientation and larger debonding area would cause the poor tribological performance of thespecimen. As the fibers are perpendicular to the sliding direction, more cracks, more cut fibers, larger debonded areas, anddeeper grooves are found in rougher surfaces by surface ploughing and fretting for specimens. This will cause a higherweight loss than it did in the specimen sliding direction parallel to the fiber direction.