Abstract
The influence of pyrolytic carbon (PyC) interphase and different pyrolysis temperatures on the mechanical and tribological properties of Cf/SiC fabricated via polymer infiltration and pyrolysis after heat treatment at 1800 °C was investigated in this study. It was shown that the PyC interphase and high pyrolysis temperature were beneficial for protecting the carbon fibres and reducing the oxygen content in the matrix. Composites with PyC interphase and high pyrolysis temperature exhibited high flexural strength and fracture toughness after heat treatment. In addition, the results of reciprocating sliding tests showed that the tribological properties of composites with PyC interphase and high pyrolysis temperature were improved, and the high-strength fibres in the composite were beneficial to the formation and stabilisation of friction film at high frequencies.
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