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| Influences of Carbonization Pressures on Densification Process and Structure Characteristic of Woven C/C Composites |
| Revised:May 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.05.000 |
| KeyWord:pitch derived carbon C/C composites carbonization porosity |
| Author | Institution |
| FU Zhao-xu |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WEN Hai-hua |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| YANG Cai-yun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LUO Lai-zheng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LI Jing-yu |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Objective To study the influences of different carbonization pressures on densification process and structure characteristic of C/C composites. Methods High temperature pitch derived carbon bulk and pitch matrix C/C composite were prepared by PIC process at different pressures. Influences of different carbonization pressures on bulk density and porosity were determined. Results When the carbonization pressure for preparing pitch carbon was increased from 20 MPa to 60 MPa, the bulk density of the pitch carbon was increased from 1.08 g/cm3 to 1.39 g/cm3; the mass specific surface area was increased from 14.74 to 16.51; the opening ratio was decreased from 26.73 to 7.94. The results showed that the effect of pore filling and the densification efficiency of impregnation-carbonization were improved. Conclusion During the densification process of woven C/C materials, the greater the pressure, the smaller the pore, and the more uniform the distribution, so the effect of densification is better. |
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