The structure and properties of plasma sprayed iron oxide doped manganese cobalt oxide spinel coatings for SOFC metallic interconnectors

J. Puranen (Corresponding Author), Juha Lagerbom, L. Hyvärinen, M. Kylmälahti, Olli Himanen, Mikko Pihlatie, Jari Kiviaho, P. Vuoristo

    Research output: Contribution to journalArticleScientificpeer-review

    25 Citations (Scopus)

    Abstract

    Manganese cobalt oxide spinel doped with Fe2O3 was studied as a protective coating on ferritic stainless steel interconnects. Chromium alloying causes problems at high operation temperatures in such oxidizing conditions where chromium compounds evaporate and poison the cathode active area, causing the degradation of the solid oxide fuel cell. In order to prevent chromium evaporation, these interconnectors need a protective coating to block the chromium evaporation and to maintain an adequate electrical conductivity. Thermal spraying is regarded as a promising way to produce dense and protective layers. In the present work, the ceramic Mn-Co-Fe oxide spinel coatings were produced by using the atmospheric plasma spray process. Coatings with low thickness and low amount of porosity were produced by optimizing deposition conditions. The original spinel structure decomposed because of the fast transformation of solid-liquid-solid states but was partially restored by using post-annealing treatment.
    Original languageEnglish
    Pages (from-to)154-159
    Number of pages6
    JournalJournal of Thermal Spray Technology
    Volume20
    Issue number1-2
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    Event2010 International Thermal Spray Conference - Singapore, Singapore
    Duration: 3 May 20105 May 2010

    Keywords

    • interconnect
    • Mn-Co spinel
    • plasma spraying
    • SOFC
    • ProperPart

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