CaO-MgO-Al2O3-SiO2 (CMAS) corrosion behaviour of LaMgAl11O19/GdPO4 thermal barrier coating materials

被引：3

作者：

Song, Chenxi ^{[1
]}

Qi, Xiang ^{[1
]}

Huang, Ling ^{[1
]}

Sun, Junbin ^{[1
,2
,3
,4
]}

Li, Lizhen ^{[1
]}

Li, Chenguang ^{[1
]}

Lu, Weihong ^{[1
,2
,3
]}

机构：

[1] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China

[2] Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China

[3] Hengyang Normal Univ, Coll Hunan Prov, Key Lab Organomet New Mat, Hengyang 421008, Peoples R China

[4] Hengyang Normal Univ, Hunan Engn Res Ctr Monitoring & Treatment Heavy Me, Hengyang 421008, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 16期

基金：

中国国家自然科学基金;

关键词：

CMAS corrosion; GdPO4; MAGNESIUM-ALUMINA-SILICATE; CONDUCTIVITY; CERAMICS; TEMPERATURE; RESISTANCE; LA; GD; SM; ND;

D O I：

10.1016/j.ceramint.2023.05.193

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：

CaO-MgO-Al2O3-SiO2 (CMAS) corrosion poses serious hidden dangers for the application of thermal barrier coatings (TBCs). In this study, LaMgAl11O19 (LMA) and GdPO4 were mixed at molar ratios of 2:1, 1:1 and 1:2 to prepare LMA/GdPO4 materials, and the CMAS corrosion behaviours of these materials were investigated at 1300 & DEG;C-1500 & DEG;C for 20 h and 40 h. It was demonstrated that temperature was the main factor influencing the corrosion behaviours and products. The materials were damaged at 1300 & DEG;C by the crystallization of CMAS melts to form CaAl2Si2O8. In contrast, the materials were corroded by CMAS melts via the reaction between CMAS and GdPO4 at 1500 & DEG;C. These results indicate that the addition of GdPO4 to LMA can improve the resistance of the LMA material to CMAS corrosion.

引用

页码：26578 / 26588

页数：11

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