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Surface binding energies of beryllium/tungsten alloys
Univ Innsbruck, Inst Ion Phys & Appl Phys, Technikerstr 25, A-6020 Innsbruck, Austria.
Univ Innsbruck, Inst Ion Phys & Appl Phys, Technikerstr 25, A-6020 Innsbruck, Austria.
Comenius Univ, Dept Nucl Phys & Biophys, Fac Math Phys & Informat, SK-84248 Bratislava, Slovakia.
Comenius Univ, Dept Nucl Phys & Biophys, Fac Math Phys & Informat, SK-84248 Bratislava, Slovakia.
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2016 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 472, 76-81 p.Article in journal (Refereed) Published
Abstract [en]

Binding energies of beryllium and tungsten atoms on surfaces of the alloys Be2W and Be12W were obtained from density functional theory calculations. Values of 4.08–5.63 eV for beryllium and 6.81–10.04 eV for tungsten were obtained. An analytical force field agrees for beryllium, but its tungsten surface atoms are too strongly bound. The surface binding energies of Be and W on Be12W surfaces is slightly smaller than on the pure Be and W surfaces, respectively. For higher tungsten content, i.e. for Be2W, the situation is more complicated. For some surfaces of this alloy the surface binding energies are enhanced while for others they are diminished, compared to the pure metal surfaces. The dependency of the cohesive energy on the mole fraction follows a linear relationship.

Place, publisher, year, edition, pages
2016. Vol. 472, 76-81 p.
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-293609DOI: 10.1016/j.jnucmat.2016.02.002ISI: 000373489700010OAI: oai:DiVA.org:uu-293609DiVA: diva2:928055
Available from: 2016-05-14 Created: 2016-05-14 Last updated: 2016-06-01Bibliographically approved

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Hermansson, Kersti
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