High-temperature performance of self-healing SiC-YSZ thermal barrier coatings deposited by using various plasma spray concepts

0555663 - ÚFP 2022 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Hassanzadeh, M. - Sokołowski, P. - Mušálek, Radek - Medřický, Jan - Csáki, Štefan
High-temperature performance of self-healing SiC-YSZ thermal barrier coatings deposited by using various plasma spray concepts.
Thermal Spray 2021: Proceedings from the International Thermal Spray Conference. Materials Park: ASM International, 2021, s. 18-22. ISBN 9781713831303.
[International Thermal Spray Conference 2021. online (CZ), 24.05.2021-28.05.2021]
Grant CEP: GA ČR(CZ) GA19-10246S
Institucionální podpora: RVO:61389021
Klíčová slova: SiC-YSZ * thermal barrier * coatings
Obor OECD: Ceramics
https://dl.asminternational.org/itsc/proceedings-abstract/ITSC%202021/83881/18/16768

In this study, a novel self-healing concept is considered in order to increase the lifetime of thermal barrier coatings (TBCs) in modern gas turbines. For that purpose, SiC healing particles were introduced to conventional 8YSZ topcoats by using various plasma spray concepts, i.e., composite or multilayered coatings. All topcoats were sprayed by SG-100 plasma torch on previously deposited NiCrAlY bondcoats produced by conventional atmospheric plasma spraying. Coatings were subjected to thermal conductivity measurements by laser flash method up to 1000°C, isothermal oxidation testing up to 200h at 1100°C and finally thermal cyclic fatigue (TCF) lifetime testing at 1100°C. Microstructural coating evaluation was performed by scanning electronic microscope (SEM), in the as-produced and post high-temperature tested states. This was done to analyze the self-healing phenomena and its influence on the high-temperature performance of the newly developed TBCs.
Trvalý link: http://hdl.handle.net/11104/0330117