Development of Ba-hexaferrite coatings for electromagnetic wave absorption applications

K. Bobzin, T. Schlaefer, M. Bégard, M. Bruehl*, G. Bolelli, L. Lusvarghi, D. Lisjak, Arto Hujanen, Pertti Lintunen, Ulla Kanerva, Tommi Varis, M. Pasquale

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    In this research, Ba-hexaferrite coatings for electromagnetic wave absorption applications were deposited by thermal spraying. A suitable powder feedstock was manufactured by blending a BaCO3 + Fe2O3 mixture, which was then agglomerated by spray-drying. The agglomerates were processed by air plasma spraying (APS) without any further treatment or were heat-treated and reactively-sintered to stoichiometric Ba-hexaferrite prior to spraying. As-sprayed coatings were analyzed by Raman spectroscopy and X-ray diffraction (XRD). Whereas the deposition of untreated agglomerates did not result in adequate amounts of crystalline Ba-hexaferrite in the coatings, the APS processing of reactively-sintered agglomerates led to a high content of Ba-hexaferrite and similar magnetic properties to those of Ba-hexaferrite bulk materials.
    Original languageEnglish
    Pages (from-to)1015-1020
    JournalSurface and Coatings Technology
    Volume205
    Issue number4
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed
    Event4th Workshop RIPT (Les Rencontres Internationales sur la Projection Thermique) - Lille, France
    Duration: 2 Dec 20094 Dec 2009

    Keywords

    • APS spraying
    • Ba-hexaferrite coatings
    • Electromagnetic properties
    • Micro-Raman spectroscopy
    • Vibrating sample magnetometer
    • X-ray diffraction

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