Effects of in situ amorphous graphite coating on ablation resistance of SiC fiber reinforced SiBCN ceramics in an oxyacetylene flame

被引：32

作者：

Li, Daxin ^{[1
]}

Wu, Daoxiong ^{[1
]}

Yang, Zhihua ^{[1
,2
]}

Zhou, Yuanyi ^{[1
]}

Wang, Shengjin ^{[1
]}

Duan, Xiaoming ^{[1
,2
]}

Jia, Dechang ^{[1
,2
]}

Zhu, Qishuai ^{[1
]}

Zhou, Yu ^{[1
]}

机构：

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

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilong Jiang, Peoples R China

来源：

CORROSION SCIENCE | 2016年 / 113卷

基金：

中国国家自然科学基金;

关键词：

Ceramic matrix composites; SEM; XRD; STEM; High temperature corrosion; B-C-N; THERMAL-SHOCK RESISTANCE; SINGLE-SOURCE-PRECURSOR; MATRIX COMPOSITES; MECHANICAL-PROPERTIES; C/SIC COMPOSITES; BEHAVIOR; OXIDATION; MICROSTRUCTURE; TORCH;

D O I：

10.1016/j.corsci.2016.10.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of in situ amorphous graphite coating on ablation behavior of SiC fiber reinforced SiBCN ceramics in an oxyacetylene flame are explored. The ablation products for both the monoliths and composites are similar, comprising amorphous SiO2 and cristobalite. The ablation resistance stems from formation of dense, passivating oxide scale of B2O3 containing amorphous SiO2. In different ablation stages, the ablation rates are synergistically controlled by various mechanisms. Interfacial structure and degradation of SiC fibers both deteriorate ablation resistance. The crystallization of SiC fibers leading to strength reduction is the main reason for poorer performance vs monoliths. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：31 / 45

页数：15

共 60 条

[1]

Baldus H., 1995, Ceram. Trans., V58, P75

[2] Ceramic fibers for matrix composites in high-temperature engine applications [J].