Chromia-forming ferritic stainless steels are being considered for interconnects applications in planar solid oxide fuel cell (SOFC) stacks because of their low cost and physical properties. At high temperatures, ferritic steels lack environmental stability in the SOFC operating environment, and gradually degrade the cell performance. In this study, an effective, dense and well adherent TiCrAlYO coating was deposited on an SS430 alloy using the filtered arc deposition technique. High-energy ion backscattering was used to characterize the composition and the thermal stability of the coatings. The chromium volatility of the coated steel plates at 800 oC was also measured using ion beam analysis. Significant reductions in oxidation rates as well as reduced Cr volatility were observed for the coated alloys.
Revised: April 7, 2011 |
Published: June 25, 2008
Citation
Chen H., J.A. Lucas, W.A. Priyantha, M. Kopczyk, R.J. Smith, K.R. Lund, and C. Key, et al. 2008.Thermal stability and oxidation resistance of TiCrAlYO coatings on SS430 for solid oxide fuel cell interconnect applications.Surface & Coatings Technology 202, no. 19:4820-4824.PNNL-SA-58313.doi:10.1016/j.surfcoat.2008.04.059