Improved CMAS corrosion resistance of rare earth niobates by high-entropy and composite design

被引：0
作者：
Tian, Liujia [1 ,2 ]
Huang, Yiling [1 ]
Song, Xuemei [1 ]
Peng, Fan [1 ]
Zheng, Wei [1 ]
Liu, Ziwei [1 ]
Zeng, Yi [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 31卷
关键词：
Thermal barrier coatings (TBCs); High entropy; Rare-earth niobate ceramics; Composite; CMAS corrosion; THERMAL-BARRIER COATINGS; OPTICAL BASICITY; DEGRADATION; CERAMICS; BEHAVIOR;
D O I：
10.1016/j.jmrt.2024.07.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study reports the preparation of two single-phase high-entropy rare-earth niobates (RE1/5Ho1/5Er1/5Y1/ 5Yb1/5)3NbO7, (RE = Ce, Lu), and two composite-phase high-entropy rare-earth niobates (RE1/5Ho1/5Er1/5Y1/ 5Yb1/5)3NbO7:(RE1/5Ho1/5Er1/5Y1/5Yb1/5)NbO4 = 1:2, (RE = Ce, Lu) via solid-phase synthesis. The interactions of these samples with molten calcium-magnesium-aluminum-silicates (CMAS) were studied at 1300 degrees C to explore their performance and mechanism in CMAS corrosion. The results indicate that the corrosion process involves the phase transformation of RE3NbO7 and the formation of apatite products. The Ce-composition sample exhibits superior performance in terms of reaction layer thickness, remaining CMAS thickness, and RE3+ content in the remaining CMAS. These findings underscore the potential application of high-entropy rare-earth niobates in thermal barrier coatings (TBCs) and contribute to understanding niobate system resistance to CMAS corrosion.
引用
收藏
页码：2388 / 2401
页数：14
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