CMAS corrosion behavior of a novel high entropy (Nd0.2Gd0.2Y0.2Er0.2Yb0.2)2Zr2O7 thermal barrier coating materials

被引：18

作者：

Lin, Guangqiang ^{[1
,2
]}

Wang, Yanli ^{[2
]}

Yang, Lingxu ^{[1
]}

Sun, Rongfa ^{[1
,2
]}

Wu, Liankui ^{[3
]}

Zhang, Xiaofeng ^{[4
,5
]}

Liu, Huijun ^{[1
]}

Zeng, Chaoliu ^{[1
]}

机构：

[1] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[3] Sun Yat Sen Univ, Sch Mat, Shenzhen 518107, Peoples R China

[4] Guangdong Acad Sci, Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510650, Peoples R China

[5] Guangdong Acad Sci, Inst New Mat, Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510650, Peoples R China

来源：

CORROSION SCIENCE | 2023年 / 224卷

关键词：

Thermal barrier coatings; Rare earth zirconate; Fluorite structure; High entropy; CMAS corrosion; High temperature; RESISTANCE; GLASS; INFILTRATION; TEMPERATURE; CERAMICS;

D O I：

10.1016/j.corsci.2023.111529

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The CMAS corrosion behavior of a novel high entropy material (Nd0.2Gd0.2Y0.2Er0.2Yb0.2)(2)Zr2O7 with thermal conductivity of 1.215 W center dot m(-1)center dot K-1 was investigated. Results show that a dense layer composed of apatite type RE8Ca2(SiO4)(6)O-2 phase and RE/Ca-ZrO2 forms in front of the reaction layer, which dramatically decreases the infiltration rate of CMAS from 20 to 5.3 mu m/h at 1300 degrees C. Moreover, the elements with a larger ion radius are easier to form apatite type phase to slow down the further infiltration of CMAS. This study reveals that the high entropy (Nd0.2Gd0.2Y0.2Er0.2Yb0.2)(2)Zr2O7 ceramic is a promising candidate for TBCs with extreme resistance to CMAS corrosion.

引用

页数：14

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