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Corrosion Behavior of SiCf/SiC Composites in High Temperature Fluoride Salt Environment
Wang, Hong-Da1,2,3; Zhou, Hai-Jun1,2; Dong, Shao-Ming1,2; Wang, Zhen1,2; Hu, Jian-Bao1,2; Feng, Qian4
2017
发表期刊Wuji Cailiao Xuebao/Journal of Inorganic Materials
ISSN1000324X
卷号32期号:11页码:1133-1140
摘要Corrosion behavior of SiCf/SiC composites, which were prepared via molten infiltration(MI), polymer impregnation and pyrolysis(PIP), and chemical vapor infiltration process(CVI), respectively, was studied by immersion in 46.5mol% LiF-11.5mol% NaF-42.0mol% KF eutectic salt at 800. The evolution of phase composition and microstructure was characterized by X-ray diffraction and scanning electron microscope with energy dispersive spectrometer. The SiC matrix of SiCf/SiC composites, derived from different preparation process, has different compositions and microstructures, leading to various compatibility with fluoride salt at high temperature. Residual free Si in MI-SiC matrix and O-contained phase in PIP-SiC matrix are the weak area with worse corrosion resistance in liquid fluoride salt and will be corroded preferentially in terms of thermodynamic. Due to the higher purity and better crystallinity over the MI-SiC matrix and PIP-SiC matrix, CVI-SiC matrix shows more excellent compatibility with fluoride salt at high temperature and has the smallest corrosion rate of 0.0445 μg/(mm2·h). Least weak area confined to the O-rich boundaries between deposited layers may account for the good corrosion resistance of CVI SiC matrix. © 2017, Science Press. All right reserved.
DOI10.15541/jim20170010
EI入藏号20181304944957
EI主题词Silicon compounds
EI分类号539.1 Metals Corrosion - 641.1 Thermodynamics - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 951 Materials Science
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25703
专题中国科学院上海硅酸盐研究所
作者单位1.Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai; 200050, China;
2.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai; 200050, China;
3.School of Graduate, University of Chinese Academy of Sciences, Beijing; 100049, China;
4.Analysis and Testing Center, Donghua University, Shanghai; 201600, China
推荐引用方式
GB/T 7714
Wang, Hong-Da,Zhou, Hai-Jun,Dong, Shao-Ming,et al. Corrosion Behavior of SiCf/SiC Composites in High Temperature Fluoride Salt Environment[J]. Wuji Cailiao Xuebao/Journal of Inorganic Materials,2017,32(11):1133-1140.
APA Wang, Hong-Da,Zhou, Hai-Jun,Dong, Shao-Ming,Wang, Zhen,Hu, Jian-Bao,&Feng, Qian.(2017).Corrosion Behavior of SiCf/SiC Composites in High Temperature Fluoride Salt Environment.Wuji Cailiao Xuebao/Journal of Inorganic Materials,32(11),1133-1140.
MLA Wang, Hong-Da,et al."Corrosion Behavior of SiCf/SiC Composites in High Temperature Fluoride Salt Environment".Wuji Cailiao Xuebao/Journal of Inorganic Materials 32.11(2017):1133-1140.
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