Journal of Inorganic Materials

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Deposition of Pyrolytic Carbon using Ethanol as Precursor in Chemical Vapor Infiltration

ZHANG Shou-Yang, YAN Xia-Feng, LI He-Jun, LI Wei, GUO Ling-Jun   

  1. (Carboncarbon Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2009-03-11 Revised:2009-05-11 Published:2009-09-20 Online:2009-09-20

Abstract: Using ethanol as the precursor of pyrolytic carbon, chemical vapor infiltration of a carbon fiber felt with an initial bulk density of 0.47g/cm3 was performed at the temperature of 1125°C and the pressure of 20kPa, resulting in a bulk density of 1.67g/cm3 after densification of 114h. Extinction angles from 19.5° to 20.5° for various regions in the densified sample are determined, which correspond to a high-textured carbon, leading to flexure strength of 137MPa. Analysis of 2D texture distribution suggests that ethanol is a promising carbon source to synthesize carbon-carbon composites with homogeneously high-textured pyrolytic carbon.

Key words: carbon-carbon composites, ethanol, chemical vapor infiltration, pyrolytic carbon, microstructure

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