In this study, the current industry standard topcoat for thermal barrier coatings, 8YSZ, is deposited by suspension plasma spraying and its room-temperature erosion resistance is compared with that of SPS sprayed gadolinium zirconate/YSZ and triple-layered GZdense/GZ/YSZ. A columnar microstructure was observed in both the single- and multi-layered TBCs. Single-layer 8YSZ had a higher erosion resistance than multi-layered GZ/YSZ despite of its higher porosity among the as-sprayed coatings. In the case of the triple-layer coating, the denser top layer helped to slightly improve erosion resistance over that of the GZ/YSZ double-layer TBC.

columnar microstructure, erosion resistance, gadolinium zirconate, suspension plasma spraying, thermal barrier coatings, yttria-stabilized zirconia
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Copyright © 2016 DVS Media GmbH. All rights reserved.
2016
DVS Media GmbH
Topics
Thermal barrier coatings Oxide-based ceramics Yttria-stabilized zirconia Suspension plasma spray coating Microstructural analysis Erosive wear resistance
Issue Section:
Suspension Spraying
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