In-situ X-ray tomography on permeability evolution of C/SiC porous ceramic for hypersonic vehicles

被引：21

作者：

Zhang, Bo ^{[1
]}

Huang, Haiming ^{[1
]}

Wu, Shengchuan ^{[2
]}

Li, Weijie ^{[1
]}

Huang, Jie ^{[1
]}

Lin, Andi ^{[1
]}

Wu, Qian ^{[1
]}

Liu, Yuexun ^{[2
]}

Xiao, Tiqiao ^{[3
]}

机构：

[1] Beijing Jiaotong Univ, Inst Engn Mech, Beijing 100044, Peoples R China

[2] Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China

[3] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 19期

基金：

中国国家自然科学基金;

关键词：

C; SiC porous Ceramics; Permeability mechanism; Transpiration cooling; In-situ synchrotron X-ray tomography; Hypersonic vehicles; MICROSTRUCTURE; COMPOSITES; ABLATION; BEHAVIOR; MATRIX;

D O I：

10.1016/j.ceramint.2021.06.204

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Transpiration cooling system in hypersonic vehicles still remains a challenge due to the limitations of observing permeability and microstructure evolution of porous medium filled with coolant. To tackle this problem, a novel compression-permeation device is designed with high-resolution X-ray tomography system, and then an investigation on permeability evolution mechanism of a C/SiC porous ceramic under pressure is performed using insitu X-ray imaging and the compression-permeation device. The experimental results indicate that the pore-space fluid flow is displayed in terms of three-dimensional streamlines, making the permeability mechanism clear. Meanwhile the porosity along the thickness of ceramic under pressure has been obtained by synchrotron tomography testing, and it is also verified that the porosity of C/SiC ceramic fabricated in our research group is basically uniform (>95.4%) along the thickness. Furthermore, we have found the evolution rule for permeability of porous ceramic with water, which depends on the variation of its microstructure under different loads.

引用

页码：27770 / 27777

页数：8

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