Optimization of RF-ICP Tungsten Deposits for Plasma Facing Components

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Optimization of RF-ICP Tungsten Deposits for Plasma Facing Components

Popis výsledku v původním jazyce

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.nIn 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.

Název v anglickém jazyce

Optimization of RF-ICP Tungsten Deposits for Plasma Facing Components

Popis výsledku anglicky

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.nIn 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.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings: 27th International Conference Nuclear Energy for New Europe

ISBN

978-80-89402-99-1

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

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Název nakladatele

Nuclear Society of Slovenia

Místo vydání

Ljubljana

Místo konání akce

Portorož

Datum konání akce

10. 9. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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