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Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former
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SYSNO ASEP 0443923 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former Author(s) Medřický, J. (CZ)
Curry, N. (SE)
Pala, Zdeněk (UFP-V) RID
Vilémová, Monika (UFP-V) RID, ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Johansson, J. (SE)
Markocsan, N. (SE)Source Title Journal of Thermal Spray Technology. - : Springer - ISSN 1059-9630
Roč. 24, č. 4 (2015), s. 622-628Number of pages 7 s. Publication form Print - P Language eng - English Country US - United States Keywords gas turbines ; high temperature application ; porosity of coatings ; stabilized zirconia ; thermal barrier coatings (TBCs) Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass R&D Projects GB14-36566G GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000351587600003 EID SCOPUS 84925447033 DOI 10.1007/s11666-014-0214-y Annotation Yttria-stabilized zirconia thermal barrier coatings are extensively used in turbine industry; however,increasing performance requirements have begun to make conventional air plasma sprayed coatings insufficient for future needs.Since the thermal conductivity of bulk material cannot be lowered easily; the design of highly porous coatings may be the most efficient way to achieve coatings with low thermal conductivity.Thus the approach of fabrication of coatings with a high porosity level based on plasma spraying of ceramic particles of dysprosia-stabilized zirconia mixed with polymer particles,has been tested.Both polymer and ceramic particles melt in plasma and after impact onto a substrate they form a coating.When the coating is subjected to heat treatment, polymer burns out and a complex structure of pores and cracks is formed.In order to obtain desired porosity level and microstructural features in coatings; a design of experiments, based on changes in spray distance,powder Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2016
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