Preparation of mesophase pitch-based carbon fibers with ribbon shape and high thermal conductive carbon/carbon composites
- Paper number
IAC-11,C2,4,9,x10703
- Author
Mr. Zhang Zhongwei, Aerospace, China
- Year
2011
- Abstract
Utilizing ribbon-shaped pitch-based carbon fibers as reinforcement and meso-phase pitch as carbon resources, carbon/carbon (C/C) composites with high thermal conductivity were fabricated by hot-pressing, carbonizing, graphitizing treatment method. The bulk density and electrical resistivity of the C/C composites treated at various temperatures were researched, and the microstructure and morphology were observed by scanning electron microscopy. The results show that the width and thickness of the ribbon-shaped fibers at the transverse section are about 1.5mm and 18$\mu$m, respectively, and the shape and structure can be nearly maintained integrity without damage in the process of hot-pressing. The bulk density and electrical resistivity of the C/C composites are respectively increasing and decreasing with the rising of heat-treatment temperature. For the samples graphitized at 2800 C, the bulk density and electrical resistivity reach 1.81g/cm3 and 1.6$\mu$ohm.m. Whereas the thermal conductivity along the axial fiber direction at room temperature is found to be as high as 545W/m.K, which are much higher than those of traditional metal materials, and the corresponding value for copper is only 398W/m.K. Thus-obtained C/C composites are shown to have low density and high thermal conductivity and hence will find potential applications as thermal management in the field of aerospace.
- Abstract document
- Manuscript document
IAC-11,C2,4,9,x10703.pdf (🔒 authorized access only).
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