environmental barrier coating (EBC) materials, rare-earth (RE) disilicates, multicomponent ceramics, calcia-magnesia-aluminosilicate (CMAS) interaction
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.
DONG, Yu; REN, Ke; WANG, Qiankun; SHAO, Gang; and WANG, Yiguang
"Interaction of multicomponent disilicate (Yb0.2Y0.2Lu0.2Sc0.2Gd0.2)2Si2O7 with molten calcia-magnesia-aluminosilicate,"
Journal of Advanced Ceramics: Vol. 11:
1, Article 2.
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol11/iss1/2