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Suspension plasma spraying of sub-stoichiometric titania by hybrid water/argon stabilized plasma torch
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SYSNO ASEP 0489904 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Suspension plasma spraying of sub-stoichiometric titania by hybrid water/argon stabilized plasma torch Author(s) Mušálek, Radek (UFP-V) RID, ORCID
Ctibor, Pavel (UFP-V) RID, ORCID
Medřický, Jan (UFP-V) RID
Tesař, Tomáš (UFP-V) ORCID
Kotlan, Jiří (UFP-V)
Lukáč, František (UFP-V) ORCIDSource Title METAL 2017 - 26th International Conference on Metallurgy and Materials, Conference Proceedings. - Ostrava : TANGER Ltd, 2017 - ISBN 978-80-87294-79-6 Pages s. 1388-1393 Number of pages 6 s. Publication form Print - P Action METAL 2017: International Conference on Metallurgy and Materials /26./ Event date 24.05.2017 - 26.05.2017 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords Liquid feedstock ; Plasma spraying ; Suspension ; Thermal spraying ; Titania ; WSP-H 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 000434346900224 EID SCOPUS 85043398952 Annotation In this study, suspension plasma spraying of sub-stoichiometric titania was attempted using hybrid water/argon stabilized plasma torch (WSP-H). Porous coatings with fine cauliflower-like columnar microstructure were successfully deposited in two separate experiments with different power levels of the plasma torch. In both cases, high solid-load content (40 wt. %) of the water-based suspension resulted in considerable coating thickness increase per deposition cycle. Coating annealing and partial remelting of the surface asperities were also achieved by additional pass of plasma torch in front of the coating surface. According to X-ray diffraction, all coatings consisted dominantly of rutile phase. Detailed microscopic observation of the as-sprayed and annealed deposits showed that the local coloration of the coating (ranging from dark blue to beige) was driven by the local overheating of the rough coating surface which could also promote the oxygen intake. Moreover, sample annealing was also observed to increase the sample reflectivity as observed by UV-VIS-NIR scanning spectrophotometry Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2020
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