Deuterium retention in tungsten co-deposits with neon and argon inclusions
Tiron, V., Ciolan, M. A., Bulai, G., Burducea, I., Iancu, D., Julin, J., Kivekäs, M., & Costin, C. (2024). Deuterium retention in tungsten co-deposits with neon and argon inclusions. Nuclear Materials and Energy, 39, Article 101656. https://doi.org/10.1016/j.nme.2024.101656
Julkaistu sarjassa
Nuclear Materials and EnergyTekijät
Päivämäärä
2024Tekijänoikeudet
© 2024 The Authors. Published by Elsevier Ltd.
Deuterium (D) retention in tungsten (W) co-deposited layers, in the presence of neon (Ne) and argon (Ar), was investigated using the bipolar High Power Impulse Magnetron Sputtering (BP-HiPIMS) technique. The deposited layers have a polycrystalline structure, with a preferential growth of W(1 1 0) phase. The concentration of D and noble gases (Ne and Ar) is almost constant throughout the depth of the layers. In a D2-Ar discharge, the deposited layers exhibit compressive stress, indicating that Ar is mostly incorporated into the interstitial sites of the W crystal lattice. D retention increases when Ne is added in the discharge, especially when the deposited layer is bombarded with highly energetic ions. Low energy Ne ions (below the W damaging threshold) induce compressive stress, indicating that Ne atoms occupy interstitial sites in the W crystal lattice. High energy Ne ions induce tensile stress, a sign that Ne is trapped in the grain boundaries as inert-gas-vacancy defects, leading to a grain-boundary relaxation. In the presence of Ne, the ion acceleration towards the layer from 0 V to 300 V results in an increase of the D content of about three times, from 3.2 at.% to 8.6 at.%.
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ElsevierISSN Hae Julkaisufoorumista
2352-1791Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/213314108
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Euroopan komissioRahoitusohjelmat(t)
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Lisätietoja rahoituksesta
The research leading to this result has been supported by the RADIATE project under the Grant Agreement 824096 from the EU Research and Innovation programme HORIZON 2020. The contribution of I. B. and D. I. to this work was also supported by two grants of the Romanian Ministry of Research, Innovation and Digitization under projects number PN 19060201 and PDI of IFIN-HH for 2022-2024, 36PFE/2021.Lisenssi
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