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

Journal of the European Ceramic Society Elsevier

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.

Authors with CRIS profile

Marc Pezoldt Lehrstuhl für Glas und Keramik (WW3)

Involved external institutions

Imperial College London / The Imperial College of Science, Technology and Medicine GB United Kingdom (GB) Université de Lorraine FR France (FR)

How to cite

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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