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The microstructural studies of suspension plasma sprayed zirconia coatings with the use of high-energy plasma torches

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    SYSNO ASEP0476027
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleThe microstructural studies of suspension plasma sprayed zirconia coatings with the use of high-energy plasma torches
    Author(s) Sokołowski, P. (PL)
    Nylen, P. (SE)
    Mušálek, Radek (UFP-V) RID, ORCID
    Łatka, L. (PL)
    Kozerski, S. (PL)
    Dietrich, D. (DE)
    Lampke, T. (DE)
    Pawłowski, L. (FR)
    Source TitleSurface and Coatings Technology. - : Elsevier - ISSN 0257-8972
    Roč. 318, May (2017), s. 250-261
    Number of pages12 s.
    Publication formPrint - P
    ActionInternational Meeting on Thermal Spraying (RIPT)/7./
    Event date09.12.2015 - 11.12.2015
    VEvent locationLimoges
    CountryFR - France
    Event typeWRD
    Languageeng - English
    CountryCH - Switzerland
    KeywordsWater-stabilized plasma (WSP) ; Gas-stabilized plasma (GSP) ; Suspension injection ; Columnar microstructure ; Two-zones microstructure ; Electron backscatter diffraction
    Subject RIVJK - Corrosion ; Surface Treatment of Materials
    OECD categoryCoating and films
    R&D ProjectsGA15-12145S GA ČR - Czech Science Foundation (CSF)
    Institutional supportUFP-V - RVO:61389021
    UT WOS000402356100029
    EID SCOPUS85016063934
    DOI10.1016/j.surfcoat.2017.03.025
    AnnotationThe presented studies are focused on the microstructure characterization of zirconia-based coatings deposited by two types of high-energy plasma torches: (i) Axial III, and, (ii) hybrid version of Water-Stabilized Plasma (WSP) torch. The suspensions were formulated using solid dispersed phase of: (i) zirconia stabilized with 14 wt of Y2O3 and (ii) zirconia stabilized with 24 wt% of CeO2 + 2.5 wt% of Y2O3 and continuous phase of water with ethanol. The spray process parameters were optimized for each plasma set-up individually. The in-flight observations (shadowgraphy) were performed to optimize the injection of the liquid feedstock into the plasma jet. Then the coatings morphology and coating/substrate interface were characterized using conventional light microscopy and scanning electron microscopy (SEM). The results showed that through the change of deposition parameters various coatings microstructures could be obtained, in particular columnar and two-zones structures. The EDS/EDX and XRD studies showed that there was no significant change in chemical/phase composition of zirconia material before and after spraying. Electron backscatter diffraction (EBSD) method allowed to analyze the grain size in the coating microstructure as well as crystallographic orientation of individual grains. The results showed that coatings were characterized by submicrometric microstructure what corresponded to the size of powder particles used to formulate suspension. No texture was observed in the coatings microstructure. The surface topography analysis which was performed by confocal scanning laser microscopy (CSLM) and Shape From Shading (SFS) technique proved the great influence of suspension concentration on the coating structure.
    WorkplaceInstitute of Plasma Physics
    ContactVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Year of Publishing2018
Number of the records: 1  

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