Using C3H6 and FA resin as carbon resources,the integral carbon felt reinforced thick鄄wall C/ C com鄄
posites were prepared by combinational process of zoning control CVI and resin impregnation carbonization(PIC). The
microstructure was observed by CT machine and PLM and thermodynamics properties are tested. In the mean time,the
results was compared to thermal gradient CVI. The results indicate that microstructure is SL,pyrocarbon is distributed
homogeneously in it. The efficiency of densification is increased by 50%,especially at the final densified stage,it
show obvious goodness. Axial compressional strength are increased by 28. 4%,while radial compression strength in鄄
creased by 33. 6%. The thermal properties kept unchanged. It can be concluded that zoning control CVI can improve
efficiency of densification greatly and homogeneous distribution of pyrocarbon,lower cost and better thermal mechani鄄
cal properties.