Thermal spraying of Co,Ti-substituted Ba-hexaferrite coatings for electromagnetic wave absorption applications

M. Bégard, K. Bobzin, G. Bolelli (Corresponding Author), Arto Hujanen, Pertti Lintunen, D. Lisjak, S. Gyergyek, L. Lusvarghi, M. Pasquale, K. Richardt, T. Schläfer, Tommi Varis

    Research output: Contribution to journalArticleScientificpeer-review

    33 Citations (Scopus)

    Abstract

    Co,Ti-substituted Ba-hexaferrite (BaCoTiFe10O19) coatings for applications as microwave absorbers were deposited by the APS and HVOF techniques, using BaCoTiFe10O19 powders manufactured by solid-state reaction followed by spray-drying. The SEM + EDX, XRD and micro-Raman analyses indicated that impact quenching of molten agglomerates on the substrate hindered the crystallisation of the hexaferrite structure, resulting in poor magnetic properties of the coatings. Adjusted processing conditions enabled the deposition of a coating retaining enough hexaferrite phase, whose magnetic properties, close to bulk BaCoTiFe10O19, are very promising for electromagnetic wave absorption.
    Original languageEnglish
    Pages (from-to)3312-3319
    Number of pages8
    JournalSurface and Coatings Technology
    Volume203
    Issue number20-21
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Plasma spraying
    • High velocity oxy-fuel spraying
    • Hexaferrite coatings
    • Electromagnetic wave absorbers
    • Metastable phases
    • Magnetic properties
    • ProperPart

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