Abstract:By taking preform weaven with radial carbon rods as reinforcement phase, C/ C composite was prepared
by impregnation and carbonization process using coal tar pitch as matrix precursor, and its bulk density is 1． 50
g/ cm3. The distribution of density was tested by CT, and the distribution of pores were analyzed by means of optical
microscope and mercury intrusion method. The results showed that the density of outer fringe of body is the highest,
and the density decreased from outboard to center along radial of the body under the technological conditions of pitch
impregnation and carbonization. The density distributed evenly along the direction of identical circle taking body center
as reference point. The porosity of the body increased from outboard to center along radial of the body. The pore
volume ratio of macropores and mesopores increased from outboard to center along radial of the body, on the contrary,
the pore volume ratio of micropores decreased from outboard to center along radial of the body .
