Composition effects on elastic, thermal and corrosion properties of multiple-RE silicate (Ho1/4Er1/4Yb1/4Lu1/4)2SiO5 as a promising thermal and environmental barrier coating material

被引：15
作者：
Ren, Xiaomin [1 ,2 ]
Zhang, Jie [1 ]
Wang, Jingyang [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 230026, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2022年 / 42卷 / 15期
关键词：
Rare earth monosilicate; Multiple-RE modification; Thermal and environmental barrier coating; Property optimization; CALCIUM-MAGNESIUM ALUMINOSILICATE; RARE-EARTH MONOSILICATES; HIGH-ENTROPY CARBIDE; EXPANSION COEFFICIENT; MECHANICAL-PROPERTIES; HIGH-TEMPERATURE; CONDUCTIVITY; BEHAVIOR; RESISTANCE; OXIDATION;
D O I：
10.1016/j.jeurceramsoc.2022.08.034
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(Ho1/4Er1/4Yb1/4Lu1/4)2SiO5 is synthesized and characterized for the application of a promising multifunctional thermal and environmental barrier coating (TEBC) material. X-ray diffraction and scanning electron microscopy analysis indicate that a X2-type multiple-RE silicate (4RE1/4)2SiO5 is formed with homogeneous distribution of the four rare earth species. Dense bulk sample exhibits excellent phase stability up to 1400 degrees C. Key properties including Young's modulus, thermal conductivity and thermal expansion coefficient show interesting compo-sition effects. Specially, (Ho1/4Er1/4Yb1/4Lu1/4)2SiO5 demonstrates higher elastic stiffness, lower thermal con-ductivity, lower thermal expansion coefficient and good resistances to molten CMAS and water vapor corrosions. These results confirm the strategy of multiple-RE engineering that may provide optimal property of advanced TEBCs.
引用
收藏
页码：7258 / 7266
页数：9
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