The hot corrosion resistance of lanthanum zirconate and yttria-stabilized zirconia coatings produced by thermal spraying for use as thermal barriers on industrial gas turbines or in aerospace applications was evaluated. The two ceramic oxide coatings were exposed for various periods of time at temperatures up to to vanadium- and sulfur-containing compounds, species often produced during the combustion of typical fuels used in these applications. Changes in the coatings were studied using a scanning electron microscope to observe the microstructure and x-ray diffraction techniques to analyze the phase composition. The results showed different behaviors for the two materials: the zirconia-based coating being rapidly degraded by the vanadium compounds and resistant to attack by the sulfur materials while the lanthanum zirconate was less damaged by exposure to vanadia but severely attacked in the presence of sulfur-containing species.
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e-mail: basil.marple@nrc.ca
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January 2006
Technical Papers
Hot Corrosion of Lanthanum Zirconate and Partially Stabilized Zirconia Thermal Barrier Coatings
Basil R. Marple,
e-mail: basil.marple@nrc.ca
Basil R. Marple
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada
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Joël Voyer,
Joël Voyer
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada
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Michel Thibodeau,
Michel Thibodeau
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada
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Douglas R. Nagy,
Douglas R. Nagy
Liburdi Engineering Limited
, 400 Highway 6 North, Dundas, ON L9H 7K4, Canada
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Robert Vassen
Robert Vassen
Institute for Materials and Processes in Energy Systems,
Forschungszentrum Jülich Gmbh
, D-52425 Jülich, Germany
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Basil R. Marple
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canadae-mail: basil.marple@nrc.ca
Joël Voyer
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada
Michel Thibodeau
National Research Council Canada
, Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada
Douglas R. Nagy
Liburdi Engineering Limited
, 400 Highway 6 North, Dundas, ON L9H 7K4, Canada
Robert Vassen
Institute for Materials and Processes in Energy Systems,
Forschungszentrum Jülich Gmbh
, D-52425 Jülich, GermanyJ. Eng. Gas Turbines Power. Jan 2006, 128(1): 144-152 (9 pages)
Published Online: July 30, 2004
Article history
Received:
February 8, 2004
Revised:
July 30, 2004
Citation
Marple, B. R., Voyer, J., Thibodeau, M., Nagy, D. R., and Vassen, R. (July 30, 2004). "Hot Corrosion of Lanthanum Zirconate and Partially Stabilized Zirconia Thermal Barrier Coatings." ASME. J. Eng. Gas Turbines Power. January 2006; 128(1): 144–152. https://doi.org/10.1115/1.1924534
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