Ablation behavior and mechanism of SiCf/Cf/SiBCN ceramic composites with improved thermal shock resistance under oxyacetylene combustion flow

被引：61

作者：

Liang, Bin ^{[1
]}

Yang, Zhihua ^{[1
]}

Li, Yuetong ^{[1
]}

Yuan, Jingkun ^{[1
]}

Jia, Dechang ^{[1
]}

Zhou, Yu ^{[1
]}

机构：

[1] Harbin Inst Technol, Inst Adv Ceram, Sch Mat Sci & Engn, Harbin 150080, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 07期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

A; Sintering; B; Composites; C; Corrosion; C. Thermal shock resistance; MATRIX COMPOSITES; OXIDATION; TORCH; CARBIDE; MORPHOLOGY; FRACTURE; C/ZRC;

D O I：

10.1016/j.ceramint.2015.03.144

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：

The ablation properties and mechanisms (under oxyacetylene combustion) together with thermal shock behavior of SiCf/C-f/SiBCN ceramic composites were investigated. The solid ablation products are primarily amorphous SiO2 and cristobalite. The primary ablation mechanisms include fiber and ceramic matrix oxidation, evaporation of B2O3 (1) and SiO2 (1), and mechanical exfoliation. SiCf/Cf/SiBCN has a significantly low mass ablation rate and a desirable linear ablation rate. The combination of crack deflection caused by SiC and carbon fibers, fiber pull-out and debonding improves thermal shock resistance and thus leads to the absence of surface macrocracks. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：8868 / 8877

页数：10

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