Abstract:In this paper, two processes for preparing needled felt with non鄄woven cloth reinforced C/ C compos鄄
ites are compared. Needled preforms are treated firstly with a CVI pre鄄densified process, and then the preforms are
densified by pitch impregnation/ carbonization. The results show that the tensile strength in axial direction is increased
by 234%, the interlaminar shear strength is increased by 126%. In addition , the thermal diffusivity is obviously in鄄
creased, while the axial coefficient of thermal expansion( CTE) is decreased. It is concluded that the material has
good comprehensive properties.
