Comparative Study of PVD Techniques for Tungsten Deposition onto Graphite Substrate for Fusion Applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F24%3A00617290" target="_blank" >RIV/61389021:_____/24:00617290 - isvavai.cz</a>

Výsledek na webu

<a href="https://soft2024.eu/wp-content/uploads/2024/09/SOFT-2024_Book-of-Abstracts_20-09-2024.pdf" target="_blank" >https://soft2024.eu/wp-content/uploads/2024/09/SOFT-2024_Book-of-Abstracts_20-09-2024.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparative Study of PVD Techniques for Tungsten Deposition onto Graphite Substrate for Fusion Applications

Popis výsledku v původním jazyce

To protect components facing high-temperature plasma, tiles made from graphite are considered as heat shields. Graphite is a preferred material for fusion shields because of its high thermal resistance, low atomic number, and low activation, which reduce maintenance, waste disposal, and safety concerns. However, its radiation damage, sputtering, and affinity to hydrogen are limitations. Tungsten’s high energy threshold for physical sputtering and its lack of sensitivity to chemical sputtering further support its use in fusion applications. The use of tungsten-coated graphite in fusion could have a positive effect on the ability to withstand high heat loads, mechanical and chemical damage from particle. This study investigates commonly utilized PVD techniques for depositing tungsten and interlayers onto graphite substrates, including magnetron sputtering and high-power impulse magnetron sputtering. Each technique offers distinct advantages and challenges in terms of deposition rate and coating adhesion. The mechanical properties, adhesion, and microstructural evolution of the deposited coatings were investigated by optical and electron microscopy and mechanical testing. The aim of the work was to compare different layers and their mechanical properties, which are essential for optimizing the design and performance of tungsten-coated graphite materials for fusion reactor components, especially plasma-facing materials.

Název v anglickém jazyce

Comparative Study of PVD Techniques for Tungsten Deposition onto Graphite Substrate for Fusion Applications

Popis výsledku anglicky

To protect components facing high-temperature plasma, tiles made from graphite are considered as heat shields. Graphite is a preferred material for fusion shields because of its high thermal resistance, low atomic number, and low activation, which reduce maintenance, waste disposal, and safety concerns. However, its radiation damage, sputtering, and affinity to hydrogen are limitations. Tungsten’s high energy threshold for physical sputtering and its lack of sensitivity to chemical sputtering further support its use in fusion applications. The use of tungsten-coated graphite in fusion could have a positive effect on the ability to withstand high heat loads, mechanical and chemical damage from particle. This study investigates commonly utilized PVD techniques for depositing tungsten and interlayers onto graphite substrates, including magnetron sputtering and high-power impulse magnetron sputtering. Each technique offers distinct advantages and challenges in terms of deposition rate and coating adhesion. The mechanical properties, adhesion, and microstructural evolution of the deposited coatings were investigated by optical and electron microscopy and mechanical testing. The aim of the work was to compare different layers and their mechanical properties, which are essential for optimizing the design and performance of tungsten-coated graphite materials for fusion reactor components, especially plasma-facing materials.

Druh

O - Ostatní výsledky

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

2024

Kód důvěrnosti údajů

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