The tensile behavior of carbon fibers at high temperatures up to 2400 °C

被引:192
作者
Sauder, C [1 ]
Lamon, J [1 ]
Pailler, R [1 ]
机构
[1] Univ Bordeaux 1, CEA, CNRS,UMR 5801, Snecma,Lab Composites Thermostruct, F-33600 Pessac, France
关键词
carbon fibers; carbon/carbon composites; mechanical properties; texture;
D O I
10.1016/j.carbon.2003.11.020
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The tensile behavior of four different brands of carbon fibers (a rayon-based, a PAN-based, and 2 pitch-based fibers) has been investigated at various temperatures up to 2400 degreesC. The tests were carried out using an original fiber testing apparatus. Various mechanical properties including strength and Young's modulus, as well as Weibull statistical parameters were extracted from test data. Typical tensile behaviors were evidenced such as an essentially linear elastic behavior at room temperature and intermediate temperatures up to 1400-1800 degreesC, then a nonlinear elastic delayed response at higher temperatures and ultimately an inelastic response with permanent deformations at very high temperatures. Such unusual nonlinear responses for homogeneous materials were related to structure and texture features at the nanometer scale, that were described through an X-ray diffraction technique. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:715 / 725
页数:11
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