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

• Published in: Journal of the American Ceramic Society Vol. 106; no. 1
• Main Authors: Ridley, Mackenzie, Kane, Kenneth, Lance, Michael J., Parker, Cory, Su, Yi-Feng, Sampath, Sanjay, Garcia, Eugenio, Sweet, Marshall, O'Connor, Molly, Pint, Bruce
• Format: Journal Article
• Language: English
• Published: United States American Ceramic Society 05.09.2022
• Subjects: MATERIALS SCIENCE

A primary failure mode for environmental barrier coatings (EBCs) on SiC ceramic matrix composites (CMCs) is the oxidation of the intermediate Si-bond coating, where the formation of SiO2 at the bond coating–EBC interface results in debonding and spallation. This work compares the microstructure evol...