Investigation of a single-layer EBC deposited on SiC/SiC CMCs: Processing and corrosion behaviour in high-temperature steam

Al Nasiri N, Patra N, Pezoldt M, Colas J, Lee WE (2019)


Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 39

Pages Range: 2703-2711

Journal Issue: 8

DOI: 10.1016/j.jeurceramsoc.2018.12.019

Abstract

Two rare earth monosilicates (Yb2SiO5, and Lu2SiO5) were deposited using a low-cost coating application method to produce a single-layer coating. RE-oxides slurries were dip coated on oxidised CMC samples and subsequently heat treated at high temperature to ensure reaction between SiO2 and RE-oxides to form the RE-monosilicate. A single, continuous, homogeneous thick coating of 25 pm was obtained. X-ray diffraction (XRD) confirmed formation of, RE-monosilicates in Yb and Lu silicate systems. Coated samples were exposed to 90% H2O static steam environment at 1350 degrees C for 25, 50, 100, and 150 h. Scanning Electron Microscopy (SEM) indicated that both coatings adhered strongly to the substrate. Coating thickness reduced from 22 mu m to 11 mu m for Yb-coating and 13 to 4 pm for Lu-coating with increasing corrosion time from 25 to 150 h, however there was no significant attack of the CMC for all steam exposure times.

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APA:

Al Nasiri, N., Patra, N., Pezoldt, M., Colas, J., & Lee, W.E. (2019). Investigation of a single-layer EBC deposited on SiC/SiC CMCs: Processing and corrosion behaviour in high-temperature steam. Journal of the European Ceramic Society, 39(8), 2703-2711. https://doi.org/10.1016/j.jeurceramsoc.2018.12.019

MLA:

Al Nasiri, N., et al. "Investigation of a single-layer EBC deposited on SiC/SiC CMCs: Processing and corrosion behaviour in high-temperature steam." Journal of the European Ceramic Society 39.8 (2019): 2703-2711.

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