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Investigations of Fe-Cr Ferritic Steels as Sofc Interconnect Material

Published online by Cambridge University Press:  10 February 2011

S. Linderoth  and
P. H. Larsen
S. Linderoth
Affiliation:
Materials Research Department, RisØ National Laboratory, DK-4000 Roskilde, Denmark, soren.linderoth@risoe.dk
P. H. Larsen
Affiliation:
Materials Research Department, RisØ National Laboratory, DK-4000 Roskilde, Denmark, soren.linderoth@risoe.dk
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Abstract

Pure Fe-Cr alloys with a Cr-content between zero and 60 wt% have been investigated with respect to their thermal expansion from room temperature to 1100°C and their corrosion resistance in air and humidified hydrogen up to 1300'C. The thermal expansion coefficient of the ferritic Fe-Cr steels is close to that of the supports used in the manufacture of thin-electrolyte cells. The corrosion resistance in air and humidified hydrogen appears to be best for a Cr content around 20 wt%. In addition, a ceria coating is found to reduce significantly the scale growth. Preliminary results for a Fe78Cr22 foil indicates that an electrical contact resistance less than 3 mQcm2 can be obtained between the alloy and a Ni/YSZ anode.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 575: Symposium CC – New Materials for Batteries & Fuel Cells , 1999 , 325
Copyright
Copyright © Materials Research Society 2000

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References

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