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Controlling Microstructure of Yttria-Stabilized Zirconia Prepared from Suspensions and Solutions by Plasma Spraying with High Feed Rates.
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SYSNO ASEP 0482532 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Controlling Microstructure of Yttria-Stabilized Zirconia Prepared from Suspensions and Solutions by Plasma Spraying with High Feed Rates. Author(s) Mušálek, Radek (UFP-V) RID, ORCID
Medřický, Jan (UFP-V) RID
Tesař, Tomáš (UFP-V) ORCID
Kotlan, Jiří (UFP-V)
Pala, Zdeněk (UFP-V) RID
Lukáč, František (UFP-V) ORCID
Illková, Ksenia (UFP-V)
Hlína, Michal (UFP-V) RID
Chráska, Tomáš (UFP-V) RID, ORCID
Sokołowski, P. (PL)
Curry, N. (AT)Source Title Journal of Thermal Spray Technology. - : Springer - ISSN 1059-9630
Roč. 26, č. 8 (2017), s. 1787-1803Number of pages 17 s. Publication form Print - P Language eng - English Country US - United States Keywords hybrid plasma torch ; microstructure ; solution ; precursor spraying ; suspension spraying ; thermal barrier ; coatings (TBCs) ; water-stabilized plasma ; yttria-stabilized zirconia (YSZ) Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films R&D Projects GA15-12145S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000416433500004 EID SCOPUS 85028991232 DOI 10.1007/s11666-017-0622-x Annotation Introduction of suspension and solution plasma spraying led to a breakthrough in the deposition of yttria-stabilized zirconia (YSZ) coatings and enabled preparation of new types of layers. However, their deposition with high feed rates needed, for example, for the deposition of thermal barrier coatings (TBCs) on large-scale components, is still challenging. In this study, possibility of high-throughput plasma spraying of YSZ coatings is demonstrated for the latest generation of high-enthalpy hybrid water-stabilized plasma (WSP-H) torch technology. The results show that microstructure of the coatings prepared by WSP-H may be tailored for specific applications by the choice of deposition conditions, in particular formulation of the liquid feedstock. Porous and columnar coatings with low thermal conductivity (0.5-0.6 W/mK) were prepared from commercial ethanol-based suspension. Dense vertically cracked coatings with higher thermal conductivity but also higher internal cohesion were deposited from suspension containing ethanol/water mixture and coarser YSZ particles. Spraying of solution formulated from diluted zirconium acetate and yttrium nitrate hexahydrate led also to the successful deposition of YSZ coating combining regions of porous and denser microstructure and providing both low thermal conductivity and improved cohesion of the coating. Enthalpy content, liquid-plasma interaction and coating buildup mechanisms are also discussed. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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