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Comparison of corrosion behaviors and wettability of CMAS on Ta2O5-Y2O3 co-stabilized ZrO2 and YSZ thermal barrier coatings.

Authors :
Wang, Jinshuang
Wang, Yinghui
Lu, Xianjun
Hu, Mengqiu
Chen, Mengdi
Shu, Chaoxi
Zhang, Hao
Tian, Yongshang
Liu, Bing
Jing, Qiangshan
Source :
Journal of the European Ceramic Society. Oct2023, Vol. 43 Issue 13, p5636-5651. 16p.
Publication Year :
2023

Abstract

High-temperature degradation of the plasma sprayed 16 mol% TaO 2.5 + 16 mol% YO 1.5 co-stabilized ZrO 2 (YTZ) and YSZ (7.6 wt% Y 2 O 3 -stabilized ZrO 2) coatings under calcium-magnesium-aluminon-silicate (CMAS) attack at 1200 °C and 1250 °C were comparatively investigated. Results indicated that the coatings were insensitive to the infiltration of CMAS after 10 h corrosion at 1200 °C. At 1250 °C, the entire YSZ cross-section completely failed and also underwent serious chemical corrosion after 3 h hot corrosion. Even after 10 h corrosion, the penetration depth of CMAS into the YTZ was only about 80 µm. For YTZ coating, the YTaO 4 stabilizer could not easily dissolve in CMAS and precipitated out of the YTZ crystal lattice owing to the strong chemical interaction between Ta5+ and Y3+. The wettability of CMAS on YTZ coating was worse than that on YSZ coating. Compared with YSZ coating, the YTZ coating showed better resistance to CMAS corrosion. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09552219
Volume :
43
Issue :
13
Database :
Academic Search Index
Journal :
Journal of the European Ceramic Society
Publication Type :
Academic Journal
Accession number :
164260371
Full Text :
https://doi.org/10.1016/j.jeurceramsoc.2023.05.020