EVOLUTION OF PORES IN C/C COMPOSITE DURING RESIN IMPREGNATION-CARBONIZATION

Acta Metall Sin

2009, Vol. 45

Issue (11): 1402-1408 DOI:

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EVOLUTION OF PORES IN C/C COMPOSITE DURING RESIN IMPREGNATION-CARBONIZATION

WU Xiaojun¹⁾; CHENG Wen²⁾; QIAO Shengru¹⁾; ZOU Wu²⁾; ZHANG Peng²⁾; ZHANG Xiaohu²⁾

1) School of Materials Science; Northwestern Polytechnical University; Xi'an 710072
2) Xi'an Aerospace Composite Materials Research Institute; Xi'an 710025

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WU Xiaojun CHENG Wen QIAO Shengru ZOU Wu ZHANG Peng ZHANG Xiaohu. EVOLUTION OF PORES IN C/C COMPOSITE DURING RESIN IMPREGNATION-CARBONIZATION. Acta Metall Sin, 2009, 45(11): 1402-1408.

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Abstract

Chemical vapor infiltrated carbon felt with the density of 1.0 g/cm³ can be further dendified by resin impregnation-carbonization more times. Mercury proximity was used to detect changes of total porosity and pore size during the process. The fractal method was used to characterize the evolution model of pores. As a proof, the changes of morphology and size of pores with impregnation-carbonization times were observed by SEM. Results indicated that the total porosity decreased with the increase of resin impregnation-carbonization times. On the contrary, the pores with size ranging from 0.04 to 6 μm increased during repeated treatment. The pore evolution law can be characterized by the fractal, and the pore fractal dimension is constantly decreased with the increase of impregnation-carbonization times. Moreover, plenty of crack-like pores formed at the first resin impregnation-carbonization were gradually filled during further impregnation-carbonization processes, which was conformed with evolution model of pores proposed by fractal method.

Key words: C/C composite resin impregnation-carbonization pore fractal dimension

Received: 15 May 2009

ZTFLH:

TB33

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Supported by National Basic Research Program of China (No.2006CB600902)

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2009/V45/I11/1402

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