In-situ grown Y3Si2C2 on RB-SiC ceramic for enhanced wet-oxygen corrosion resistance

Y3Si2C2 were successfully in-situ grown on reaction bonded SiC ceramic (RB-SiC) via molten-salt method, and the phase composition, microstructure and wet-oxygen corrosion behavior at 1400 °C for the Y3Si2C2 coated SiC ceramics are investigated. Results indicated that the coating applied on the surfa...

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Bibliographic Details
Published in:Ceramics international 2024-12, Vol.50 (24), p.56086-56098
Main Authors: Duan, Junjie, Chen, Yi, Wang, Jingjing, Chen, Maolin, Zhang, Qinzhao, Xiao, Peng, Li, Yang
Format: Article
Language:English
Subjects:
SiC ceramic
Wet-oxygen corrosion
Y3Si2C2
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Summary:Y3Si2C2 were successfully in-situ grown on reaction bonded SiC ceramic (RB-SiC) via molten-salt method, and the phase composition, microstructure and wet-oxygen corrosion behavior at 1400 °C for the Y3Si2C2 coated SiC ceramics are investigated. Results indicated that the coating applied on the surface of SiC ceramic mainly consists of Y3Si2C2 phase. The in-situ grown coatings with relatively favorable adhesion to the RB-SiC matrix were achieved by optimizing the processing parameters. The coating thickness and integrity exhibit an increased trend as the preparation temperature increased, owing to the faster diffusion of Y element at higher temperatures. The oxidation product, Y2Si2O7, resulting from oxidation of Y3Si2C2-containing rare earth yttrium compound coating, exhibits excellent resistance to wet-oxygen corrosion at 1400 °C for RB-SiC ceramic.
ISSN:0272-8842
DOI:10.1016/j.ceramint.2024.09.366