Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (9): 994-998.DOI: 10.3724/SP.J.1077.2010.00994

• Research Paper • Previous Articles     Next Articles

Axial Thermodynamic Performance Analysis of the Different Preform C/C Composites

JI A-Lin1, LI He-Jun1, CUI Hong2, CHENG Wen2   

  1. (1. The Material Institute of Northwestern Polytechnic University, Xi’an 710072, China; 2. Xi’an Aerospace Composites Research Institute, Xi’an 710025, China)
  • Received:2009-11-19 Revised:2010-04-07 Online:2010-09-20 Published:2010-08-25
  • Contact: JI A-Lin

Abstract:

Axial thermodynamic performance of braid carbon/carbon (C/C) composites and needle C/C composites is compared. Braid C/C composites comprises the radial rod preform composite, the axial rod preform composite and the fine woven punctured preform composite. Needle C/C composites consist of the whole felt preform composites and the carbon clothes/felt layer needling preform composites. The bulk density of the whole felt preform approximates 0.2g/cm3, and the carbon clothes/felt layer needling preform is about 0.45g/cm3. The density of needle preform is less than that of braid perform, which is up to 0.70g/cm3. Axial fiber content of braid preform is more than or equal to 19%, while that of needle preform is only 5%. The axial tensile strength and thermal expansion coefficient are related to the structure of preform and axial fiber content. The average axial tensile strength of braid C/C composites is ≥40MPa, and while the needle C/C composites is around 10MPa. The axial thermal expansion coefficient of the axial rod preform, the fine woven punctured preform, the whole felt preform and the carbon clothes/felt layer needle preform C/C composites is comparative in the range of RT -800℃.

Key words: C/C composites, perform, braid, needle, axial, tensile strength, thermal expansion coefficient

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