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Microstructures and properties of thermal barrier coatings deposited by hybrid water-stabilized plasma torch
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SYSNO ASEP 0555655 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Microstructures and properties of thermal barrier coatings deposited by hybrid water-stabilized plasma torch Author(s) Mušálek, Radek (UFP-V) RID, ORCID
Tesař, Tomáš (UFP-V) ORCID
Medřický, Jan (UFP-V) RID
Lukáč, František (UFP-V) ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Gupta, M. (SE)Number of authors 6 Source Title Proceedings of the International Thermal Spray Conference. - Materials Park : ASM International, 2019 - ISBN 978-1-62708-242-6 Pages s. 738-745 Number of pages 8 s. Publication form Online - E Action International Thermal Spray Conference and Exposition: New Waves of Thermal Spray Technology for Sustainable Growt Event date 26.05.2019 - 29.05.2019 VEvent location Yokohama Country JP - Japan Event type WRD Language eng - English Country US - United States Keywords coatings ; hybrid water-stabilized plasma torch ; microstructures Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films R&D Projects GA19-10246S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 EID SCOPUS 85073876666 Annotation Hybrid Water-Stabilized Plasma (WSP-H) torch provides high-enthalpy plasma which may be utilized for high-throughput and yet economical spraying of coatings from powders, suspensions, and solutions. It was previously demonstrated that microstructures and functional properties of the WSP-H coatings may be tailored to a wide extent for various new applications, namely those requiring high coating thickness and/or coating of large components. In this study, applicability of WSP-H technology for spraying of novel thermal barrier coatings (TBCs) is demonstrated. WSP-H technology was used for spraying of yttria-stabilized zirconia (YSZ) top-coats from powder, suspension and solution. Yttria content in the top-coat feedstock was 7-8 wt.%. NiCrAlY bond-coat was also sprayed by WSP-H and Hastelloy-X alloy was used as substrate material. Microstructure, phase composition, and endurance of the deposited coatings in thermal cycling fatigue (TCF) test were evaluated. Each thermal cycle consisted of rapid heating to 1100 °C, followed by one hour dwell and rapid cooling. All coatings showed excellent stability and TCF resistance withstanding more than 700 cycles surpassing in TCF test some of the currently commercially used TBCs. Lifetime of TBC with columnar top-coat deposited from suspension exceeded even more than 900 cycles. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022
Number of the records: 1