Effects of water vapor on corrosion behaviors of C/SiC in oxidizing atmosphere containing Na2SO4 vapor

被引：13
|
作者：
Luan, Xin'gang [1 ]
Zhang, Jun [1 ]
Cheng, Laifei [1 ]
机构：
[1] NW Polytech Univ, Sci & Technol Thermlstruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2012年 / 43卷 / 08期
关键词：
Ceramic-matrix composites (CMCs); Corrosion; Damage mechanics; Electron microscopy; SIO2 SCALE VOLATILITY; SILICON-BASED CERAMICS; COMBUSTION CONDITIONS; SALT VAPOR; ENVIRONMENTS; OXIDATION; COMPOSITE; RECESSION; KINETICS; CARBIDE;
D O I：
10.1016/j.compositesb.2012.05.047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion of a C/SiC composite has been investigated in the atmosphere containing oxygen, water vapor and sodium sulfate vapor at the temperatures range from 1000 to 1500 degrees C. The effect of water vapor on the corrosion mechanism of C/SiC were discussed based on the weight change, the residual strength change, the microstructure and calculated results from FactSage. The corrosion of C/SiC is attributed to (i) the permeation of gas through the SiO2 film below 1300 degrees C, (ii) the diffusion of oxidant through pores caused by bubbles broken in the SiO2 film above 1300 degrees C. The water vapor does not change the corrosion mechanism of C/SiC composite but the temperature range in which the corrosion mechanism works by accelerating the oxidation of SIC and the corrosion of SiO2. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2968 / 2972
页数：5
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