Ablation behavior of Y2SiO5/SiC coating for C/C composites under oxyacetylene torch

被引：35

作者：

Zhang, Jia-Ping ^{[1
]}

Fu, Qian-Gang ^{[1
]}

Li, He-Jun ^{[1
]}

Sun, Guo-Dong ^{[1
]}

Sun, Can ^{[1
]}

Nan, Xiao-Ying ^{[1
]}

Li, Shen-Fei ^{[1
]}

Liu, Lei ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

CORROSION SCIENCE | 2014年 / 87卷

基金：

中国国家自然科学基金;

关键词：

Ceramic matrix composites; SEM; High temperature corrosion; OXIDATION PROTECTION; CARBON/CARBON COMPOSITES; SIC COMPOSITES; MICROSTRUCTURE; CARBIDE;

D O I：

10.1016/j.corsci.2014.07.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ablation behavior of a Y2SiO5/SiC coating was investigated under oxyacetylene torch with two different heat fluxes. Applying the Y2SiO5/SiC coating, the ablation resistant property of C/C composites was improved obviously with heat flux of 2.38 MW/m(2), and the linear and mass ablation rates were reduced by 56% and 90% after ablation for 60 s, respectively. The good ablation resistance is attributed to the glassy protective layer of SiO2 and Y2O3 that reduces heat transfer and oxidizing species transport. As heat flux increased to 4.18 MW/m(2), increase of mechanical denuding and chemical erosion resulted in the degradation of the ablation resistance. (c) 2014 Elsevier Ltd. All rights reserved.

引用

页码：472 / 478

页数：7

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