Hot corrosion behaviour of Gd2O3 doped LaMgAl11O19 thermal barrier coating exposed to molten V2O5 at 900 °C

被引：6

作者：

Cao, Shengjun ^{[1
]}

Sun, Junbin ^{[1
]}

Chen, Ting ^{[1
]}

Wang, Juan ^{[1
]}

Chen, Mansheng ^{[1
]}

Hui, Yu ^{[3
]}

Wang, Jinshuang ^{[2
]}

Li, Wenyi ^{[1
]}

Lu, Weihong ^{[1
]}

机构：

[1] Hengyang Normal Univ, Hunan Engn Res Ctr Monitoring & Treatment Heavy M, Hunan Prov Univ Key Lab Funct Organomet Mat, Key Lab Funct Met Organ Cpds Hunan Prov,Coll Chem, Hengyang 421008, Peoples R China

[2] Xinyang Normal Univ, Henan Prov Key Lab Utilisat Nonmetall Mineral Sou, Xinyang 464000, Peoples R China

[3] Shenyang Acad Environm Sci, Atmospher Environm Res Ctr, Shenyang 110016, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 13期

基金：

中国国家自然科学基金;

关键词：

LaMgAl11O19; Hot corrosion; Molten V2O5; LANTHANUM MAGNESIUM HEXAALUMINATE; CYCLING BEHAVIOR; MICROSTRUCTURE; CERAMICS; PROPERTY;

D O I：

10.1016/j.ceramint.2021.03.214

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：

This study investigates the hot corrosion behaviours of La1-xGdxMgAl11O19 (x = 0, 0.2, 0.4, 0.6, 0.8) bulk ceramics and ceramic coatings. The hot corrosion resistance of the ceramic coating was inferior to that of the bulk ceramic, owing to the formation of an amorphous phase during the plasma spraying process. The smaller size of Gd3+ in comparison with La3+ facilitated the ready combination of Gd 3+ with VO43-. LaVO4 was obtained as the corrosion product in the LaMgAl11O19 (LMA) sample. Upon doping the LMA with Gd2O3 , the LaVO4 was almost entirely replaced by GdVO4 . Therefore, the sacrificial action of GdMgAl11O19 protected the LMA from hot corrosion, while also providing a new method for modifying the corrosion resistance of molten slag.

引用

页码：18792 / 18799

页数：8

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