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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Kočí, Jan | Prague |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Naraparaju, Ravisankar
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Processing of Nb-coatings on ZrB2 and C-ZrB2/SiC composites
- 2024Influence of GdO coatings on the oxidation behavior of Zirconium Diboride
- 2024Performance of EB-PVD Y-based EBC System under High Temperature Water Vapor Environment
- 2023Popocatepetl Ash Infiltration in Lanthanum-Gadolinium Zirconate Ceramics
- 2023Single and multi-component REDS systems for TEBC application: Synthesis and study of high temperature interaction with CMAS
- 2023Novel magnetron sputtered yttrium-silicon-iron oxide as CMAS resistant top coat material for environmental barrier coatingscitations
- 2020Novel magnetron sputtered ceramic YSiFe oxide as CMAS-resistant coatings for environmental barrier coatings.
- 2019Investigation of CMAS resistance of sacrificial suspension sprayed alumina topcoats on EB-PVD 7YSZ layerscitations
- 2019Investigation of CMAS Resistance of Sacrificial Suspension Sprayed Alumina Topcoats on EB-PVD 7YSZ Layerscitations
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document
Investigation of CMAS Resistance of Sacrificial Suspension Sprayed Alumina Topcoats on EB-PVD 7YSZ Layers
Abstract
Molten calcium-magnesium-aluminum-silicate (CMAS) mineral particles cause significant degradation of thermal barrier coatings (TBCs) in aero-engines. One approach to protect the TBC coating against the CMAS attack is the application of a sacrificial coating on top of the TBC coating.In this work sacrificial Al2O3 coatings were deposited on top of EB-PVD 7YSZ layers using suspension thermal spraying starting from an aqueous Al2O3 suspension. Spray parameters were varied in order to produce sacrificial topcoats with two different microstructures and porosities levels. The coating systems were tested under CMAS attack by performing short and long-time infiltration tests at 1250 °C. It was found out that the porosity and morphology of Al2O3 coatings strongly influenced the CMAS infiltration kinetics and the formation of various phases. CMAS mitigation depended on the interaction between the coating morphology which rules the driving force for infiltration, as well as on the reaction speed betweenalumina and the CMAS deposit.