Oxidation behavior of 3D-C/SiC composites fabricated by PIP process at low temperatures

摘要

The oxidation behavior of C/SiC composites, prepared at low temperature as 900°, comparatively lower than currently reported fabrication temperatures, was investigated, which indicated that the C/SiC composites started to oxidize at about 600°C, and the flexural strength was enhanced diversely after oxidated under 800°C, and then reduced in succession with the oxidative temperature increasing. In particular, the flexural strength reached 701.46MPa after oxidated at 600°C. The vitreous SiO_2, oxidative product of C/SiC composites, maybe protected the reinforced carbon fibers and remedied the holes and crackles, and then consequently enhanced the performance of C/SiC composites.