Structure, Growth Feature and Graphitizability of Chemical VaporDeposited Pyrolitic Carbons

The structure, growth feature and graphitizability of typical rough laminar (RL) and smooth laminar (SL) pyrolitic carbons in carbon/carbon composites were studied by using transmission electron microscopy and laser Raman spectroscopy. The results show that RL pyrolitic carbon is characterized by a plate-like structure and featured by growth cones. The c axis of every crystallite in the same cone is parallel each other, and there is a small angle between those in the adjacent cones. Whereas no obvious growth feature can be observed in SL pyrolitc carbon. RL pyrolitic carbon is more graphitizable than SL. Heat treated at 2400℃, the angular width of the (002) diffraction arc of them are 39?and 66?respectively, and the graphitization degree 87.6% and 25.6%. A growth model was proposed to explain the growth feature of RL pyrolitic carbon.