Abstract: Pitch-derived carbon foam was prepared from petroleum mesophase pitch，followed by foaming, carbonization and graphitization. The obtained carbon foams were then strength-enhanced through precursor infiltration and pyrolysis（PIP） technique using polycarbosilane(PCS). Their micrographs were investigated by a scanning electron microscope（SEM）and phase identification was detected by powder X-ray diffraction（XRD）. The results show that pyrolysis product of PCS was β-SiC and compressive strength of the carbon foam observably enhanced with the increase of PIP times.

Key words: Carbon foam, Strength-enhanced, Precursor infiltration and pyrolysis, Compressive strength, Thermal conductivity