Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy

Anette Nørgaard Hansson, Peter B. Friehling, Søren Linderoth, Marcel A.J. Somers

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.
    Original languageEnglish
    Title of host publicationMass and charge transport in inorganic materials-II
    PublisherTechna Srl
    Publication date2002
    Publication statusPublished - 2002
    EventMass and charge transport in inorganic materials - Firenze
    Duration: 5 Nov 1829 → …


    ConferenceMass and charge transport in inorganic materials
    Period05/11/1829 → …


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