Sputtered Fe1·5CoNi0.5 coating: An improved protective coating for SOFC interconnect applications |
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| Affiliation: | 1. Shenyang National Laboratory for Materials Science, Northeastern University, No.3-11 Wenhua Road, Shenyang, 110819, China;2. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada |
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| Abstract: | In an attempt to optimize the properties of FeCoNi coating for planar solid oxide fuel cell (SOFC) interconnect application, the coating composition is modified by increasing the ratio of Fe/Ni. An Fe1·5CoNi0.5 (Fe:Co:Ni = 1.5:1:0.5, atomic ratio) metallic coating is fabricated on SUS 430 stainless steel by magnetron sputtering, followed by oxidation in air at 800°C. The Fe1·5CoNi0.5 coating is thermally converted to (Fe,Co,Ni)3O4 and (Fe,Co,Mn,Ni)3O4 without (Ni,Co)O particles. After oxidation for 1680 h, no further migration of Cr is detected in the thermally converted coating region. A low oxidation rate of 5.9 × 10?14 g2 cm?4 s?1 and area specific resistance of 12.64 mΩ·cm2 is obtained for Fe1·5CoNi0.5 coated steels. |
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| Keywords: | Solid oxide fuel cells Spinel coating Magnetron sputtering Oxidation Area specific resistance |
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