Study of Iron-Based Alloys in Solid Oxide Fuel Cell Temperature and Atmosphere Conditions, Effect of a Silver-Coating

Abstract:

The French Atomic Energy Commission has developed a High Temperature Electrolyzer having an original coaxial architecture. Important elements are spring-like interconnects which allow to cope with thermal dilatation. Specifications of these components are low-cost, long term electrical conductivity achieved by chemical and mechanical stability. Potential candidates are iron-based alloys on which thin silver-coating may be deposited. In this paper we study the interaction of such systems with a mixture of hot vapour and hydrogen that is representative of the electrolyzer environment. Oxidation kinetic is measured by thermogravimetry. The oxide layer composition and morphology of tested samples are then investigated using Energy Dispersive Spectroscopy (EDS) and Auger Electron Spectroscopy (AES). These analyses demonstrate that hydrogen content strongly impacts the oxidation mechanism.

• Periodical: Solid State Phenomena (Volume 183)
• Pages: 9-16
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.183.9
• Online since: December 2011
• Authors: I. Aubert, J. Jumel, M. Tarek-Lamazouade, Julien Vulliet
• Keywords: Alloy Interconnect, High Temperature Electrolyzer, High Temperature Oxidation, Hydrogen

References

[1] J.W. Fergus, Mater. Sci. Eng., 2005, vol. A397, pp.271-283.

[2] M. Lamazouade-Tarek, I. Aubert, J. Jumel, Defect and Diffusion Forum, Vol. 312-315, Diffusion in Solids and Liquids VI, 2011, pp.806-811.

DOI: 10.4028/www.scientific.net/ddf.312-315.806

[3] W.J. Quadakkers , J. Piron-Abellan, V. Shemet., L. Singheiser,. Mater. High Temp., (2003), vol. 20, 2, pp.115-127.

DOI: 10.3184/096034003782749071

[4] B. Pierragi, Oxid. Met. 27 (1987) pp.177-185.

[5] P.J. Craig, ,C.D. Lutgard, J. V Steven, K. Hideto, Solid State Ionics 178 (2007) 287– 296.

[6] X. Montero, F. Tietz, D. Stöver, M. Cassir, I. Villarreal, Corros. Sci. 51 (2009) 110–118.

[7] S. Fontana, R. Amendola, S. Chevalier, P. Piccardo, G. Caboche, M. Viviani, R.

[8] S. Fontana, S. Chevalier, G. Caboche, Journal of power sources, 193 (2009) 136–145.

[9] S. Chandra-Ambhorn, Y. Wouters, L. Antoni, F. Toscan, A. Galerie, J. Power Sources 171 (2007) 688–695.

DOI: 10.1016/j.jpowsour.2007.06.058

[10] I. Aubert, J-M. Olive, N. Saintier, Materials Science and Engineering: A, Volume 527, Issues 21-22, (2010), Pages 5858-5866.

[11] J. Chêne, Plastox2007, EDP Sciences, (2009) 131-145.

[12] Liu, Y. J. Power Sources, (2008), vol. 179, pp.286-291.