We study the heat resistance and electric conductivity of the specimens of Crofer 22 APU steel, which is traditionally used for the production of interconnects of solid-oxide fuel cells, a bulk composite based on the Ti2AlC MAX phase, and a vacuum-arc coating of the Ti–Al–C system on a thin (0.5 mm) VT1-0 titanium sheet in the intact state and after long-term holding (1000 h) in air at 600°. We study the evolution of the phase compositions of the composite and the coating in the course of long-term holding in oxidizing media and the changes in the oxidation resistance and electric conductivity observed in the course of this evolution. It is shown that thin (0.5 mm) titanium interconnects with the indicated coating may serve as an efficient alternative to the interconnects made of the Crofer-type steel, which enables us to avoid the negative influence of chromium on the serviceability of solid-oxide fuel cells and significantly (by ~ 50%) decrease the weight of batteries of these cells.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 57, No. 2, pp. 70–75, March–April, 2021.
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Ostash, O.P., Prikhna, T.O., Podhurska, V.Y. et al. Light Interconnects for Medium-Temperature (550–650°С) Solid-Oxide Fuel Cells. Mater Sci 57, 215–220 (2021). https://doi.org/10.1007/s11003-021-00534-1
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DOI: https://doi.org/10.1007/s11003-021-00534-1