Pitch-based carbon fibres derived from thermoset fibres oxidized with Cl2containing air
✍ Scribed by T. Tomioka; Y. Arai; T. Hamada
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 611 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0022-2461
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✦ Synopsis
Mesophase pitch-based carbon fibres thermoset with CI2 containing air were studied for their microstructures and physical properties. Carbon fibres thermoset with CI2 containing air and heat-treated at 2000 ~ (CI22000) possessed slightly smaller mean sizes of crystallites Lc(0 0 2)s, lower densities, lower tensile moduli of elasticity, and higher tensile strengths than those thermoset with air. X-ray diffraction measurements revealed a somewhat lower degree of preferred orientation of a carbon fibre which was thermoset with CI2 containing air. The CI2 thermosetting partly disordered the periodic arrangement of crystallites and reduced the crystallite size Lo(0 0 2) of a carbon fibre heat-treated at a lower temperature. A strong temperature dependence of resistivity was shown for CI2800, suggesting much disorder in its microstructure due to the CI2 thermosetting, and CI21000 and CI21200, respectively showed specific temperature dependencies of resistivities.