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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
Source PublicationWuji Cailiao Xuebao/Journal of Inorganic Materials
ISSN1000324X
Volume32Issue:11Pages:1133-1140
AbstractCorrosion 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 Accession Number20181304944957
EI KeywordsSilicon compounds
EI Classification Number539.1 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
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25703
Collection中国科学院上海硅酸盐研究所
Affiliation1.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
Recommended Citation
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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