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Optimization of RF-ICP Tungsten Deposits for Plasma Facing Components
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SYSNO ASEP 0498212 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Optimization of RF-ICP Tungsten Deposits for Plasma Facing Components Author(s) Klečka, Jakub (UFP-V) ORCID
Čížek, Jan (UFP-V) ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Zlatník, R. (CZ)Number of authors 4 Source Title Proceedings: 27th International Conference Nuclear Energy for New Europe. - Ljubljana : Nuclear Society of Slovenia, 2017 - ISBN 978-80-89402-99-1 Number of pages 9 s. Publication form Online - E Action 27th International Conference Nuclear Energy for New Europe Event date 10.09.2018 - 13.09.2018 VEvent location Portorož Country SI - Slovenia Event type EUR Language eng - English Country SI - Slovenia Keywords tungsten ; plasma-facing components Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA17-23154S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 Annotation Tungsten (W) and its alloys are promising candidate materials for plasma facing components (PFC) in future fusion reactors. Despite having many advantages (the highest melting point of all metals, high density, low vapor pressure), tungsten also possesses several drawbacks, such as poor machinability and weldability. One of the nowadays considered PFC production routes is plasma spraying. For this, the conventional gas-stabilized atmospheric plasma torches have inherent critical limitations (insufficient plasma enthalpy to efficiently melt the tungsten particles, susceptibility to oxidation at elevated temperatures). The novel radio frequency inductively coupled plasma (RF-ICP) is a unique system capable of overcoming these limitations. Using RF-ICP, more efficient melting of tungsten particles and controlled atmosphere provide a unique possibility to produce dense, oxides-free deposits.
In our study, TekSpray-15 RF-ICP (Tekna, Canada) was used for the preparation of tungsten coatings from two different feedstock powders under varying system parameters (torch power, chamber pressure). Their influence was studied via SEM observations of the deposits microstructure as well as XRD analyses.Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019 Electronic address http://www.nss.si/nene2018/Contents.htm
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