Two-dimensional carbon fiber cloth reinforced silicon carbide (2D C-f/SiC) composites were fabricated along the route of precursor infiltration and pyrolysis with 3k JC1(#) carbon fiber cloth as the reinforcement and polycarbosilane (PCS) as precursors. The effects of the matrix microstructure on the oxidation resistance of the composites were investigated. The results showed that the oxidation resistance were related to the contents of free carbon and pores in the matrix. The oxidation resistance of the 2D C-f/SiC composites was improved through reduction of the contents of free carbon and pores in the matrix. After oxidation in a muffle furnace at 1300 degrees C for 20 minutes, the 2D C-f/SiC composites exhibited good anti-oxidation properties, with the mass loss rate of only 2.2%, and the ratio of flexural strengths and fracture toughness reached 83.6% and 80.9% respectively.
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