Corrosion resistance of GdPO4 thermal barrier coating candidate in the presence of CMAS+NaVO3 and CMAS

被引：30
作者：
Guo, Lei [1 ,2 ]
Feng, Jiayi [1 ]
Meng, Shijun [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[2] Minist Educ, Tianjin Key Lab Adv Joining Technol, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 208卷
关键词：
Thermal barrier coatings; CMAS; CMAS + NaVO 3; Interface reaction layer; Crystalline products; PHASE-EQUILIBRIA; LNPO(4) LN; REPO4; RE; BEHAVIOR; MECHANISM; GD; ND; LA; CONDUCTIVITY; DELAMINATION;
D O I：
10.1016/j.corsci.2022.110628
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
GdPO4 is a promising thermal barrier coating (TBC) candidate owing to its excellent resistance to calciummagnesium-alumina-silicate (CMAS) and molten salt corrosion. In this study, the corrosion behavior of GdPO4 in CMAS + molten salt (CN) was investigated and compared with that in CMAS. At 1200 and 1250 degrees C, interface reaction layers rapidly formed on both the CN and CMAS attacked GdPO4 pellets, and many crystalline products were generated in the melts. This effectively increased the melt viscosity and suppressed its penetration. As compared to CMAS, CN was more aggressive to GdPO4 at 1200 degrees C but less at 1250 degrees C.
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页数：10
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