Abstract
Ethanol,which is a renewable resource,was used as a precursor to prepare carbon/carbon (C/C) composites by chemical vapor infiltration (CVI),and the relationship between density and infiltration time was investigated. The flexural strength was determined by a three-point bend test. The microstructure and fracture-surface morphology of the composites were observed by polarized light microscopy and scanning electron microscopy respectively. Results show that the bulk density reaches 1.47 g/cm3 for a 96 h densification,a significant improvement in densification efficiency compared with other precursors. A high-textured carbon matrix,consisting of rough laminar pyrocarbon,can be easily obtained. The C/C composites exhibit a pseudo-plastic failure behavior. Ethanol is a new promising precursor for the densification of C/C composites.
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