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.

引用

页数：13

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