Preparation of carbon/carbon composites by microwave pyrolysis chemical vapour infiltration

摘要

The C/C composites were fabricated by MCVI using CH_4 as the source gas at 1100 and 1150℃. The density of C/C composites prepared at 1100℃ for 90 h reaches 1.70 g cm~(-3) (the primary density≈0.2 g cm~(-3)). During the process the deposition temperature has some influences on the densification rate, and the preforms can be densified from the inside out at 1100℃. The process is rapid and low energy consumed. This provides a novel method and good idea for the low cost fabrication of the carbon matrix composites, for example C/C, SiC/C and SiC/C/C composites.