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

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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