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Impact of protective and contacting layers on the long-term SOFC operation

: Kusnezoff, M.; Megel, S.; Sauchuk, V.; Girdauskaite, E.; Beckert, W.; Reinert, A.

Bansal, N.P.:
Advances in solid oxide fuel cells V : A collection of papers presented at the 33rd International Conference on Advanced Ceramics and Composites, January 18 - 23, 2009, Daytona Beach, Florida
Wiley, 2010 (Ceramic engineering and science proceedings 30,4)
ISBN: 978-0-470-45754-2
International Conference on Advanced Ceramics and Composites <33, 2009, Daytona Beach>
Conference Paper
Fraunhofer IKTS ()

Different combinations of protective and contacting layers are investigated to decrease a long-term degrdn. and high temp. oxidn. of Fe-Cr alloys/steels. The protective coatings influence both factors which cause the degrdn. of the stack: growth of the resistance of the oxide scale and chromium release from interconnect. The porous contacting layer helps to decrease the contact resistance between the interconnect and the cathode and is applied as a rule on top of the protective layer or on the cathode surface. The oxidn. of interconnect as well as interaction between interconnect and porous ceramic layers based on perovskite (LSMC) and spinel (MCF, CNM) materials is investigated. It was found that even porous coating applied to the interconnect generally reduces oxide scale growth and chromium release. On basis of developed method for measurement of oxide scale resistance the ASR values of oxide scale formed between ferritic alloy and ceramics as well as its increase with ann