The Distribution of Microstructure and Mechanical Properties of Carbon-Carbon Composites

Abstract:

The effect of microstructure and its distribution of pyrolytic carbon in different deposition stage in carbon-carbon composites infiltrated by multi-factor physical fields chemical vapor infiltration (CVI) on the mechanical has been studied by polarized -light microscopy, Raman spectra, scanning electron microscope and three-point bending tests. The temperature and the change of the [A_S/V_R]-ratio with progressive infiltration are key parameters for the formation of microstructure and its distribution of pyrolytic carbon around the same fiber. SL pyrolytic carbon corresponds to brittle failure mode and smooth two-step fracture surface due to its low and uniform texture，although the abnormal graphitization occurs in the carbon fiber near the fiber/matrix interface. In contrast, RL matrix can function for achievement of nonbrittle fracture behavior with a zig-zag-like fracture surface and a relatively high value of flexural strength due to high and nonuniform texture.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 531-536
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.531
• Online since: July 2011
• Authors: Zhi Yong Xie, Rui Xuan Tan, Ming Yu Zhang, Zhe An Su, Jian Xun Chen, Qi Zhong Huang
• Keywords: Carbon-Carbon Composites, Microstructure, Optical Microscopy, Raman Spectroscopy, Scanning Electron Microscope (SEM), Three-Point Bending Tests

References

[1] Reznik B, Gerthsen D. Carbon 2003; 41: 57-69.

[2] Benzinger W, Hüttinger KJ. Carbon 1999; 37: 1311-1322.

[3] Reznik B, Guellali M, Gerthsen D, Oberacker R, Hoffmann MJ. Materials letters 2002; 52: 14-19.

DOI: 10.1016/s0167-577x(01)00357-3

[4] Liberman ML, Pierson HO. Carbon 1974;12:233-41.

[5] Agnès Oberlin. Pyrocarbons. Carbon 2002; 40:7-24.

[6] Nemanich R J,Solin S A. Phys.Rev.,1979,B20(2):392-401.

[7] Tuinstra F, Koeing JL. J Chem Phys 1970;53(3)1126-30.

[8] Nakamizo M, Kammereck R, Walker PL. Carbon 1974;12:259-67.

[9] Fuqin Zhang, Baiyun Huang, Qizhong Huang, Xian Xiong, Tengfei Chen. Carbon 2003;41:610-2.

[10] Loll P, Delhaès P, Pacault A, Pierre A. Carbon 1977; 15:383-90.

[11] Féron O, Langlais F, Naslain R, Thébault J. Carbon 1999; 37:1343-53.

[12] Lavenac J, Langlais F, Féron O, Naslain R. Composites science and technology 2001; 61:339-345.

DOI: 10.1016/s0266-3538(00)00125-1

[13] Mc Allister P, Hendricks JF, Wolf EE. Carbon 1990;28:579-88.

[14] Dupel P, Bourrat X, Pailler R. Carbon 1995;33:1193-204.