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Research Article | Open Access

Interaction of multicomponent disilicate (Yb0.2Y0.2Lu0.2Sc0.2Gd0.2)2Si2O7 with molten calcia-magnesia-aluminosilicate

Yu DONG1,†, Ke REN2,†, Qiankun WANG1, Gang SHAO3, Yiguang WANG2( )
Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, China

† Yu Dong and Ke Ren contributed equally to this work.

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Abstract

Environmental barrier coating (EBC) materials that are resistant against molten calcia-magnesia-aluminosilicate (CMAS) corrosion are urgently required. Herein, multicomponent rare-earth (RE) disilicate ((Yb0.2Y0.2Lu0.2Sc0.2Gd0.2)2Si2O7, (5RE)2Si2O7) was investigated with regard to its CMAS interaction behavior at 1400 ℃. Compared with the individual RE disilicates, the (5RE)2Si2O7 material exhibited improved resistance against CMAS attack. The dominant process involved in the interaction of (5RE)2Si2O7 with CMAS was reaction-recrystallization. A dense and continuous reaction layer protected the substrate from rapid corrosion at high temperatures. The results demonstrated that multicomponent strategy of RE species in disilicate can provide a new perspective in the development of promising EBC materials with improved corrosion resistance.

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Keywords

environmental barrier coating (EBC) materialsrare-earth (RE) disilicatesmulticomponent ceramicscalcia-magnesia-aluminosilicate (CMAS) interaction

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Journal of Advanced Ceramics
Volume 11 Issue 1,
January 2022
Pages 66-74
DOI: 10.1007/s40145-021-0517-7

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DONG Y, REN K, WANG Q, et al. Interaction of multicomponent disilicate (Yb0.2Y0.2Lu0.2Sc0.2Gd0.2)2Si2O7 with molten calcia-magnesia-aluminosilicate. Journal of Advanced Ceramics, 2022, 11(1): 66-74. https://doi.org/10.1007/s40145-021-0517-7

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Received: 06 February 2021
Revised: 17 May 2021
Accepted: 08 July 2021
Published: 06 November 2021
© The Author(s) 2021.

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