Characterization of High-Velocity Single Particle Impacts on Plasma-Sprayed Ceramic Coatings

Jarkko Kiilakoski, Matti Lindroos, Marian Apostol, Heli Koivuluoto, Veli-Tapani Kuokkala, Petri Vuoristo

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)
    34 Downloads (Pure)

    Abstract

    High-velocity impact wear can have a significant effect on the lifetime of thermally sprayed coatings in multiple applications, e.g., in the process and paper industries. Plasma-sprayed oxide coatings, such as Cr2O3- and TiO2-based coatings, are often used in these industries in wear and corrosion applications. An experimental impact study was performed on thermally sprayed ceramic coatings using the High-Velocity Particle Impactor (HVPI) at oblique angles to investigate the damage, failure, and deformation of the coated structures. The impact site was characterized by profilometry, optical microscopy, and scanning electron microscopy (SEM). Furthermore, the connection between the microstructural details and impact behavior was studied in order to reveal the damage and failure characteristics at a more comprehensive level. Differences in the fracture behavior were found between the thermally sprayed Cr2O3 and TiO2 coatings, and a concept of critical impact energy is presented here. The superior cohesion of the TiO2 coating inhibited interlamellar cracking while the Cr2O3 coating suffered greater damage at high impact energies. The HVPI experiment has proven to be able to produce valuable information about the deformation behavior of coatings under high strain rates and could be utilized further in the development of wear-resistant coatings.

    Original languageEnglish
    Pages (from-to)1127-1137
    Number of pages11
    JournalJournal of Thermal Spray Technology
    Volume25
    DOIs
    Publication statusPublished - 24 Jun 2016
    Publication typeA1 Journal article-refereed

    Keywords

    • electron microscopy
    • fracture
    • impact wear
    • thermal spray coatings
    • wear testing

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Materials Chemistry
    • Surfaces, Coatings and Films

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