Raman spectroscopic characterization of SiO2 phase transformation and Si substrate stress relevant to EBC performance

Article Materials Science, Ceramics

Steam oxidation and microstructural evolution of rare earth silicate environmental barrier coatings

Mackenzie Ridley et al.

Summary: This study compares the microstructure evolution and steam oxidation kinetics of Si-bond coatings beneath (Y/Yb)DS and YbDS/YbMS EBCs. The results show that the steam oxidation rate of (Y/Yb)DS EBC is reduced compared to YbDS/YbMS.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2023)

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Article Materials Science, Ceramics

Evaluating steam oxidation kinetics of environmental barrier coatings

Kenneth Kane et al.

Summary: The study shows that EBCs have a certain effect on reducing the rate of SiO2 formation, especially when paired with a Si bond coating. The adhesion of the coating and roughness of the substrate play a crucial role in the effectiveness of EBCs.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2022)

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Article Engineering, Mechanical

Environmental Barrier Coating Oxidation and Adhesion Strength

Bryan J. Harder et al.

Summary: This study explores the effects of plasma spray-physical vapor deposition (PS-PVD) Yb2Si2O7 environmental barrier coatings (EBCs) on adhesion strength after exposure in a high-temperature steam environment, with analysis conducted using electron microscopy and X-ray diffraction to evaluate changes in morphology, oxide layer thickness, composition, and crystal structure. The strength of the system is also evaluated with respect to oxidation rate to provide a qualitative understanding of coating durability.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2021)

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Article Materials Science, Ceramics

Oxidation of 3D-printed SiC in air and steam environments

Kenneth Kane et al.

Summary: The study compared the high-temperature oxidation of 3D-printed SiC and CVD SiC, finding that thicker oxide scales were formed on 3D-printed SiC surfaces due to tensile hoop stresses driven by oxidation volume expansion during steam oxidation.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2021)

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Article Materials Science, Ceramics