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Corrosion of RE2Si2O7 (RE = Y, Yb, and Lu) environmental barrier coating materials by molten calcium-magnesium-alumino-silicate glass at high temperatures
Tian, Zhilin; Ren, Xiaomin; Lei, Yiming; Zheng, Liya; Geng, Wanrong; Zhang, Jie; Wang, Jingyan
2019-11-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume39Issue:14Pages:4245-4254
AbstractWith the increased demand for high operating temperature of gas turbine engines, corrosion by molten calcium-magnesium-alumino-silicate (CMAS) exhibits a significant challenge to the development of durable environmental barrier coatings (EBCs). EBC candidates, gamma-Y2Si2O7, beta-Yb2Si2O7, and beta-Lu2Si2O7 were explored on their corrosion resistance to CMAS melts at 1300 degrees C and 1500 degrees C for 50 h. Interaction and degradation mechanisms were investigated and the corrosion behaviors showed different trends at high temperatures. At 1300 degrees C, RE2Si2O7 dissolves into CMAS melts and apatite phases reprecipitate forming a thick recession layer. However, when the temperature increases to 1500 degrees C, CMAS melts vigorously penetrate through the grain boundary of RE2Si2O7 and 'blister' cracks form throughout the samples. The reduced grain boundary stability at 1500 degrees C promotes the penetration of CMAS melts in RE2Si2O7. Grain boundary engineering is critically demanded to optimize CMAS corrosion at high temperatures.
KeywordRare earth silicates Corrosion Calcium-magnesium-alumino-silicate Environmental barrier coating materials
Indexed BySCI
Language英语
WOS IDWOS:000476965000038
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80683
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Tian, Zhilin,Ren, Xiaomin,Lei, Yiming,et al. Corrosion of RE2Si2O7 (RE = Y, Yb, and Lu) environmental barrier coating materials by molten calcium-magnesium-alumino-silicate glass at high temperatures[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(14):4245-4254.
APA Tian, Zhilin.,Ren, Xiaomin.,Lei, Yiming.,Zheng, Liya.,Geng, Wanrong.,...&Wang, Jingyan.(2019).Corrosion of RE2Si2O7 (RE = Y, Yb, and Lu) environmental barrier coating materials by molten calcium-magnesium-alumino-silicate glass at high temperatures.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(14),4245-4254.
MLA Tian, Zhilin,et al."Corrosion of RE2Si2O7 (RE = Y, Yb, and Lu) environmental barrier coating materials by molten calcium-magnesium-alumino-silicate glass at high temperatures".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.14(2019):4245-4254.
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