Abstract:C/ C-SiC composites are gaining increasing attention because of their excellent high temperature re ̄
sistance.In this workꎬ C/ C-SiC composites were prepared from silicon ̄containing aryacetylene (PSA) resin and car ̄
bon fibers by precursor infiltration and pyrolysis(PIP). A porous C/ C-SiC composite was prepared by pyrolysising a
T300 fabric carbon fiber reinforced PSA resin composite( T300/ PSA composite) in argon and the pyrolysis process
was studied. The flexural strength of the porous C/ C-SiC composite is 98 MPa. The process of PIP was investigated
for the porous C/ C-SiC composite. After the porous C/ C-SiC prefabricate is infiltratedꎬ cured and pyrolysised for 4
timesꎬ the flexural strength of the obtained dense C/ C-SiC composite reaches 202 MPa. Microstructure of C/ C-SiC
composites is characterized by XRDꎬ SEMꎬ Raman spectra and TEMꎬ main component of C/ C-SiC composite are a ̄
morphous carbon and β-SiC.