Comparison of morphology and microstructure of ablation centre of C/SiC composites by oxy-acetylene torch at 2900 and 3550 °C

被引：67

作者：

Chen, Zhaofeng ^{[1
]}

Fang, Dan ^{[1
]}

Miao, Yunliang ^{[2
]}

Yan, Bo ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

[2] Yixing Tianniao High Technol Co Ltd, Yixing 214216, Peoples R China

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 12期

关键词：

Morphology; Microstructure; Low pressure chemical vapor infiltration; C/SiC composite; Oxy-acetylene torch ablation;

D O I：

10.1016/j.corsci.2008.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-temperature application above 1600 degrees C of C/SiC composites requires evaluation of the ablation properties. The C/SiC composites were prepared by low pressure chemical vapor infiltration using CH(3)SiCl(3) as precursor. As-prepared C/SiC composites were ablated by oxy-acetylene flame with the temperature of 2900 and 3550 degrees C. Above 3550 degrees C, subliming of carbon fiber and silicon carbide matrix was the main ablation behaviour. At 2900 degrees C, thermal decomposition and oxidation of SiC matrix were the main ablation behaviour. A carbon coating resulted from the pyrolysis of the acetylene prevented the C/SiC from oxidizing dramatically. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3378 / 3381

页数：4

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