A new high entropy rare earth disilicate ceramic (Lu1/8Yb1/8Sc1/8Er1/8Y1/8Ho1/8Dy1/8Tb1/8)2Si2O7: High temperature corrosion of water vapor and molten calcium-magnesium-aluminosilicate (CMAS)

被引：3
作者：
Wang, Xu [1 ,2 ,3 ]
Xu, Feihan [1 ,2 ,3 ]
Meng, Mingyu [1 ,2 ,3 ]
Liu, Ling [1 ,2 ,3 ]
Tian, Xinchun [1 ,2 ,3 ]
Gao, Lihong [1 ,2 ,3 ]
Zhu, Shizhen [1 ,2 ]
Ma, Zhuang [1 ,2 ,3 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China
[3] Beijing Inst Technol, Chongqing Innovat Ctr, Chongqing 401120, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 983卷
基金：
中国国家自然科学基金;
关键词：
Thermal conductivity; Water vapor corrosion; CMAS corrosion; LOW-THERMAL-CONDUCTIVITY; ENVIRONMENTAL BARRIER COATINGS; SOLID-SOLUTIONS; RE2SIO5; RE; RESISTANCE; LU; GD; YB; ER;
D O I：
10.1016/j.jallcom.2024.173687
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A new beta-Lu1/8Yb1/8Sc1/8Er1/8Y1/8Ho1/8Dy1/8Tb1/8)(2)Si2O7 ((8RE(1/8))(2)Si2O7) disilicate was prepared using a solid reaction process to protect SiCf/SiC CMC component materials. The thermal properties and corrosion resistance of (8RE(1/8))(2)Si2O7 were systematically studied. Experimental results showed that (8RE(1/8))(2)Si2O7 exhibited lower thermal conductivity than that of one-component silicate materials, only 1.80 (W center dot m(-1)center dot K-1) at 1000 degrees C. Meanwhile, (8RE(1/8))(2)Si2O7 also exhibited superior water vapor and CMAS corrosion resistance. The weight loss was 1.05 x 10(-4) g/cm(2) after 200 h corrosion at 1400 degrees C. When it interacted with CMAS at 1300 degree celsius for 48 h, the reaction layer was only 16 mu m. Therefore, (8RE(1/8))(2)Si2O7 could be regarded as a remarkable candidate for T/EBC.
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页数：13
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