"Interaction of multicomponent disilicate (Yb<sub>0.2</sub>Y<sub>0.2</s" by Yu DONG, Ke REN et al.

Article Title

Interaction of multicomponent disilicate (Yb_0.2Y_0.2Lu_0.2Sc_0.2Gd_0.2)₂Si₂O₇ with molten calcia-magnesia-aluminosilicate

Authors

Yu DONG, Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Ke REN, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
Qiankun WANG, Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Gang SHAO, Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, China
Yiguang WANG, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China

Keywords

environmental barrier coating (EBC) materials, rare-earth (RE) disilicates, multicomponent ceramics, calcia-magnesia-aluminosilicate (CMAS) interaction

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 ((Yb_0.2Y_0.2Lu_0.2Sc_0.2Gd_0.2)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.

Recommended Citation

DONG, Yu; REN, Ke; WANG, Qiankun; SHAO, Gang; and WANG, Yiguang (2022) "Interaction of multicomponent disilicate (Yb_0.2Y_0.2Lu_0.2Sc_0.2Gd_0.2)₂Si₂O₇ with molten calcia-magnesia-aluminosilicate," Journal of Advanced Ceramics: Vol. 11: Iss. 1, Article 2.
DOI: https://doi.org/10.1007/s40145-021-0517-7
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol11/iss1/2

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