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Effect of matrix gas phase deposition cycles on the microstructure and properties of 2D C/SiC

Luan, Xin’gang and Tian, Min and Xu, Xingya and Cheng, Laifei and Riedel, Ralf (2014):
Effect of matrix gas phase deposition cycles on the microstructure and properties of 2D C/SiC.
In: Composites Science and Technology, 90Elsevier Science Publishing, pp. 117-122, ISSN 02663538,
[Online-Edition: http://dx.doi.org/10.1016/j.compscitech.2013.11.001],
[Article]

Abstract

Effects of processing on the microstructure and property of carbon fiber reinforced silicon carbide matrix composites, namely 2D C/SiC composites, have been investigated with respect to micro-crack evolution, strength change and mass loss, etc. Several 2D C/SiC materials prepared with different chemical vapour infiltration (CVI) cycles of SiC were studied. Raman spectroscopy was employed to measure the residual stress in the matrix of the C/SiC composite based on the shift of the position of the LO band of SiC. Two kinds of mircocracks were found during the preparation of C/SiC. One type of cracks originating from the corners of braided holes barely changes during the whole processing, the other type arising between the braided holes decreases with increasing matrix volume. The former is most responsible for carbon fibers oxidation at elevated temperature. The evaluation of the microstructure and properties of the material is discussed in terms of the internal stress changed with the deposition of the matrix.

Item Type: Article
Erschienen: 2014
Creators: Luan, Xin’gang and Tian, Min and Xu, Xingya and Cheng, Laifei and Riedel, Ralf
Title: Effect of matrix gas phase deposition cycles on the microstructure and properties of 2D C/SiC
Language: English
Abstract:

Effects of processing on the microstructure and property of carbon fiber reinforced silicon carbide matrix composites, namely 2D C/SiC composites, have been investigated with respect to micro-crack evolution, strength change and mass loss, etc. Several 2D C/SiC materials prepared with different chemical vapour infiltration (CVI) cycles of SiC were studied. Raman spectroscopy was employed to measure the residual stress in the matrix of the C/SiC composite based on the shift of the position of the LO band of SiC. Two kinds of mircocracks were found during the preparation of C/SiC. One type of cracks originating from the corners of braided holes barely changes during the whole processing, the other type arising between the braided holes decreases with increasing matrix volume. The former is most responsible for carbon fibers oxidation at elevated temperature. The evaluation of the microstructure and properties of the material is discussed in terms of the internal stress changed with the deposition of the matrix.

Journal or Publication Title: Composites Science and Technology
Volume: 90
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Ceramic–matrix composites (CMCs), Matrix cracking, Crack, Scanning electron microscopy (SEM), Chemical vapour infiltration (CVI)
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 20 Mar 2014 09:45
Official URL: http://dx.doi.org/10.1016/j.compscitech.2013.11.001
Identification Number: doi:10.1016/j.compscitech.2013.11.001
Funders: The work was supported by National Basic Research Program of China (973 Program) (2011CB605806) and 111 Project (B08040). , The authors also acknowledge the financial support of the Natural Science Foundation of China (Contract No. 51002121).
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