Effects of Pyrolysis Temperatures on the Microstructure and Mechanical Properties of 2D-Cf/Si-O-C Composites
Two-dimensional carbon fiber cloth reinforced silicon oxycarbide (2D-Cf/Si-O-C) composites were fabricated with silicone resin (SR) as precursors, ethanol as solvent and SiC as inert fillers by precursor infiltration pyrolysis (PIP). Effects of the pyrolysis temperatures in the first cycle and the last but third cycle on the microstructure and mechanical properties of 2D-Cf/Si-O-C composites were investigated. The results showed that, when the pyrolysis temperature of the first cycle was 1200°C, 2D-Cf/Si-O-C composites exhibited good mechanical properties, which can be attributed to the better fiber/matrix interfacial bonding. When the pyrolysis temperature of the last but third cycle was 1400°C, the mechanical properties of 2D Cf/Si-O-C composites were further enhanced. The flexural strength and fracture toughness of the composites reached 263.9MPa and 12.8 MPa·m1/2, respectively.
Wei Pan and Jianghong Gong
J. Y. Liu et al., "Effects of Pyrolysis Temperatures on the Microstructure and Mechanical Properties of 2D-Cf/Si-O-C Composites", Key Engineering Materials, Vols. 368-372, pp. 1022-1024, 2008