Abstract: Carbon-carbon composites with a density of 1.63 g/cm³ were prepared by chemical liquid vaporized deposition with toluene as the precursors and stratum carbon-cloth as the preform at 950 ℃ in 9 hours. Its microstructure, X-ray diffraction and mechanical properties were measured. The results indicate that the homogeneous materials can be prepared by chemical liquid vaporized deposition using toluene as the precursors. The ingredient of the recovered toluene was also analyzed with GC/MS. The possible mechanism of initial pyrolysis and polymeric process of toluene was discussed.

Key words: Carbon-carbon composites, Chemical liquid-vaporized deposition, Toluene, Cracking mechanism