Fiber/Matrix Interface in Carbon/Carbon Composites

Effect of Surface Morphology of Carbon Fibers

Abstract

Carbon/carbon composites have been made with three kinds of carbon fibers having irregular shape, bean shape and circular crossections as reinforcements and coal tar pitch as matrix precursor with low pressure pyrolysis. The microstructure of the matrix at the fiber/matrix interface is found to be influenced by the surface morphology of the fibers. This is further found to influence the fracture behaviour and mechanical properties of the ultimate carbon/carbon composites.