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
收藏
页码：26578 / 26588
页数：11
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