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Abstract
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Rapidly rising contact resistance and cathode Cr poisoning are the major problems associated
with unavoidable chromia scale growth on ferritic stainless steel (FSS) interconnects of solid
oxide fuel cells. This work investigates the performance of the novel screen-printed composite
coatings consisting of dispersed conductive LaCrO3 particles in a CuFe2O4 spinel matrix for
Crofer 22 APU FSS, with emphasis on the oxidation behavior and electrical conductivity of
these coatings. The results show that the presence of protective spinel coating, accompanied by
the effective role of LaCrO3 particle incorporation, prevents the Cr2O3 subscale growth as well
as chromium migration into the coating surface at the end of 400 hours of oxidation at 1073 K
(800 C) in air. In addition, the composite coatings decreased the area specific resistance (ASR)
from 51.7 and 13.8 mX cm2 for uncoated and spinel-coated samples, respectively, to a
maximum of 7.7 mX cm2 for composite-coated samples after 400 hours of oxidation.
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