Abstract
A novel phenolic resin/silica hybrid ceramer fabricated via the sol-gel method was prepared. Hybrid systems with different inorganic contents were used as the matrix precursors to fabricate the silica containing carbon/carbon composites. Isothermal oxidation tests at temperatures ranging between 650°C and 750°C were employed to investigate how the oxidation resistance of the derived carbon/carbon composites is improved. Furthermore, the isothermal oxidation test results between 550°C and 615°C were used to calculate the activation energy of oxidation. Experimental results demonstrate that the silica containing carbon/carbon composites have a better oxidation resistance than those derived from pure phenolic resins. Meanwhile, morphological observations indicate that the oxidation of carbon fibers is retarded in the phenolic resin/silica hybrid derived carbon/carbon composites.
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Lin, JM., Ma, CC.M. & Chang, WC. Carbon/carbon composites derived from phenolic resin/silica hybrid ceramers Part I Oxidation resistance and morphological properties. Journal of Materials Science 36, 4259–4266 (2001). https://doi.org/10.1023/A:1017945711517
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DOI: https://doi.org/10.1023/A:1017945711517