Micro-CT characterization on porosity structure of 3D Cf/SiCm composite

被引：48
|
作者：
Feng, Yanjian [1 ]
Feng, Zude [1 ]
Li, Siwei [2 ]
Zhang, Weihua [2 ]
Luan, Xingan [2 ]
Liu, Yongsheng [2 ]
Cheng, Laifei [2 ]
Zhang, Litong [2 ]
机构：
[1] Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China
[2] NW Polytech Univ, Natl Key Lab Thermostruct Composite Mat, Xian 710072, Shaanxi, Peoples R China
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2011年 / 42卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Ceramic-matrix composites; Porosity; Microstructures; X-ray microcomputed tomography; CHEMICAL-VAPOR INFILTRATION; X-RAY MICROTOMOGRAPHY; CERAMIC-MATRIX COMPOSITES; C/SIC COMPOSITES; FIBER STRUCTURES; SILICON-CARBIDE; C/C COMPOSITES; FABRICATION; TOMOGRAPHY; MODEL;
D O I：
10.1016/j.compositesa.2011.07.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fabric architecture and porosity of three-dimensional (3D) C-f/SiCm composites are characterized using commercial X-ray microcomputed tomography (microCT). The non-destructive observation exhibits an inhomogeneous structure of the carbon fiber performs with gradiently distributed porosity. The shape of fiber bundles and porosity are investigated with respect to the gas transport during chemical vapor infiltration (CVI). Difference in growth rate of deposition between outer surface and inner porosity are identified through reconstructing the porosity morphology, which coincides well with the "node-bond" theoretical model. Moreover, in the light of the porosity features, gas retention and viscous flow is revealed to play key roles in the formation of the inner structure of C-f/SiCm. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1645 / 1650
页数：6
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