effect of pyrolytic carbon interface on performance of c/c composite
- Paper number
IAC-13,C2,P,36.p1,x18927
- Author
Mr. Jiantao Sun, China
- Year
2013
- Abstract
Carbon fiber-reinforced carbon matrix composite (C/C composite) possess such a high strength, toughness, self-lubricating capability, excellent thermal conductivity and extremely low coefficient of thermal expansion at high temperatures that they are ideal choice for a number of aerospace applications including space structural material of space telescope or reflector, and sealing material of engine in the extreme environment. In order to study the effect of carbon matrix structure on the performance, the C/C composite with pyrolytic carbon interface and pitch derived carbon, which were prepared by CVI and HPIC, were compared to pure pitch derived carbon matrix. The results indicated that the mechanical performance of the C/C composite increased as the bonding strength of the fiber/matrix interface was improved by pyrolytic carbon. The tensile strength in Z directions increased 6.7%, compression strength in Z and x-y directions increased 3.9% and 13.7% respectively, and punching shear strength in Z directions increased 22.2%. Pyrolytic carbon with excellent thermophysical properties could increase the thermal conductivity, decrease the coefficient of thermal expansion, and improved the thermal impact properties of C/C composite. Pyrolytic carbon with well ablation resistance could limit the extended rate of ablation reaction along the interface. The linear ablation rate decreased 50% in the oxygen-acetylene flame test. As the radial carbon fiber content was higher in the weave pierced perform, the effect of Pyrolytic carbon interface on the radial performance of C/C composite were more remarkable.
- Abstract document
- Manuscript document
(absent)