Inter-diffusion between Co3O4 coatings and the oxide scale on Fe-22Cr

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The oxidation behaviour of a commercially available Fe-22Cr alloy coated with a Co3O4 layer by spray-painting or plasma-spraying was investigated at 1173K in air with 1% H2O and compared to the oxidation behaviour of the non-coated alloy. The oxide morphology was examined with X-ray diffraction, electron microscopy, and energy dispersive X-ray spectroscopy. Cr2O3 developed in-between the Co3O4 coating and the alloy, whilst alloying elements of the substrate were incorporated in the coating, regardless of the deposition method. The coatings reduced the growth rate of the Cr2O3 layer as well as the evolution in contact resistance with time between two Fe-22Cr plates sandwiched around a Pt-mesh. SiO2 developed as particles within the alloy during oxidation of the Co3O4 spray-painted samples, whereas SiO2 was identified as an interfacial layer between Cr2O3 and the alloy after oxidation of the Co3O4 plasma-sprayed and the non-coated samples. The difference in morphology is suggested to be an effect of SiO2 nucleation assisted by Kirkendall void formation.
    Original languageEnglish
    JournalJournal of Alloys and Compounds
    Volume433
    Issue number1
    Pages (from-to)193-201
    ISSN0925-8388
    DOIs
    Publication statusPublished - 2007

    Cite this

    @article{49298a29138b439dba5c8eca6919c70e,
    title = "Inter-diffusion between Co3O4 coatings and the oxide scale on Fe-22Cr",
    abstract = "The oxidation behaviour of a commercially available Fe-22Cr alloy coated with a Co3O4 layer by spray-painting or plasma-spraying was investigated at 1173K in air with 1{\%} H2O and compared to the oxidation behaviour of the non-coated alloy. The oxide morphology was examined with X-ray diffraction, electron microscopy, and energy dispersive X-ray spectroscopy. Cr2O3 developed in-between the Co3O4 coating and the alloy, whilst alloying elements of the substrate were incorporated in the coating, regardless of the deposition method. The coatings reduced the growth rate of the Cr2O3 layer as well as the evolution in contact resistance with time between two Fe-22Cr plates sandwiched around a Pt-mesh. SiO2 developed as particles within the alloy during oxidation of the Co3O4 spray-painted samples, whereas SiO2 was identified as an interfacial layer between Cr2O3 and the alloy after oxidation of the Co3O4 plasma-sprayed and the non-coated samples. The difference in morphology is suggested to be an effect of SiO2 nucleation assisted by Kirkendall void formation.",
    author = "Hansson, {Anette N{\o}rgaard} and S{\o}ren Linderoth and Mogensen, {Mogens Bjerg} and Somers, {Marcel A. J.}",
    year = "2007",
    doi = "10.1016/j.jallcom.2006.06.086",
    language = "English",
    volume = "433",
    pages = "193--201",
    journal = "Journal of Alloys and Compounds",
    issn = "0925-8388",
    publisher = "Elsevier",
    number = "1",

    }

    Inter-diffusion between Co3O4 coatings and the oxide scale on Fe-22Cr. / Hansson, Anette Nørgaard; Linderoth, Søren; Mogensen, Mogens Bjerg; Somers, Marcel A. J.

    In: Journal of Alloys and Compounds, Vol. 433, No. 1, 2007, p. 193-201.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Inter-diffusion between Co3O4 coatings and the oxide scale on Fe-22Cr

    AU - Hansson, Anette Nørgaard

    AU - Linderoth, Søren

    AU - Mogensen, Mogens Bjerg

    AU - Somers, Marcel A. J.

    PY - 2007

    Y1 - 2007

    N2 - The oxidation behaviour of a commercially available Fe-22Cr alloy coated with a Co3O4 layer by spray-painting or plasma-spraying was investigated at 1173K in air with 1% H2O and compared to the oxidation behaviour of the non-coated alloy. The oxide morphology was examined with X-ray diffraction, electron microscopy, and energy dispersive X-ray spectroscopy. Cr2O3 developed in-between the Co3O4 coating and the alloy, whilst alloying elements of the substrate were incorporated in the coating, regardless of the deposition method. The coatings reduced the growth rate of the Cr2O3 layer as well as the evolution in contact resistance with time between two Fe-22Cr plates sandwiched around a Pt-mesh. SiO2 developed as particles within the alloy during oxidation of the Co3O4 spray-painted samples, whereas SiO2 was identified as an interfacial layer between Cr2O3 and the alloy after oxidation of the Co3O4 plasma-sprayed and the non-coated samples. The difference in morphology is suggested to be an effect of SiO2 nucleation assisted by Kirkendall void formation.

    AB - The oxidation behaviour of a commercially available Fe-22Cr alloy coated with a Co3O4 layer by spray-painting or plasma-spraying was investigated at 1173K in air with 1% H2O and compared to the oxidation behaviour of the non-coated alloy. The oxide morphology was examined with X-ray diffraction, electron microscopy, and energy dispersive X-ray spectroscopy. Cr2O3 developed in-between the Co3O4 coating and the alloy, whilst alloying elements of the substrate were incorporated in the coating, regardless of the deposition method. The coatings reduced the growth rate of the Cr2O3 layer as well as the evolution in contact resistance with time between two Fe-22Cr plates sandwiched around a Pt-mesh. SiO2 developed as particles within the alloy during oxidation of the Co3O4 spray-painted samples, whereas SiO2 was identified as an interfacial layer between Cr2O3 and the alloy after oxidation of the Co3O4 plasma-sprayed and the non-coated samples. The difference in morphology is suggested to be an effect of SiO2 nucleation assisted by Kirkendall void formation.

    U2 - 10.1016/j.jallcom.2006.06.086

    DO - 10.1016/j.jallcom.2006.06.086

    M3 - Journal article

    VL - 433

    SP - 193

    EP - 201

    JO - Journal of Alloys and Compounds

    JF - Journal of Alloys and Compounds

    SN - 0925-8388

    IS - 1

    ER -