Environmental Barrier Coatings Deposited by Suspension Plasma Spraying
Year: 2026
Type: article
Abstract: ABSTRACT Fully crystalline, dense environmental barrier coatings (EBCs) are required to protect SiC‐based ceramic matrix composites, which are the advanced structural materials for hot‐section components of gas turbines. Thermal spray technologies, which have been widely used for depositing thermal barrier coatings, are also applied to deposit EBCs. Avoiding the segmental cracks is one of the main challenges in depositing thermal sprayed EBCs. In this work, suspension plasma spraying (SPS) was used to deposit EBCs on the SiC substrates. The combustion of an ethanol‐based suspension can bring plasma additional enthalpy. As a result of that, extremely high deposition temperatures (above 1200°C) could be achieved. At such high deposition temperatures, fully crystalline crack‐free Yb 2 Si 2 O 7 coatings were successfully obtained. However, A relatively high amount of Yb 2 SiO 5 phase was observed in the as‐sprayed coatings. The high amount of the Yb 2 SiO 5 phase was attributed to the high surface ratio of the particles formed during the suspension plasma spray.
DOI: 10.1111/jace.70976
Authors: Dapeng Zhou, Emine Bakan, Yoo Jung Sohn, Weijie Dong, Robert Vassen
Institution: Forschungszentrum Jülich
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,070
OpenAlex ID: W7167023926