Helium migration in Zr-Nb multilayers under electric field

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00351070" target="_blank" >RIV/68407700:21230/21:00351070 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jnucmat.2021.153133" target="_blank" >https://doi.org/10.1016/j.jnucmat.2021.153133</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2021.153133" target="_blank" >10.1016/j.jnucmat.2021.153133</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Helium migration in Zr-Nb multilayers under electric field

Popis výsledku v původním jazyce

The alpha particles, which appear during the nuclear reactions and are transformed into He atoms, are often implanted into (or produced in) the structural materials causing deterioration of the mechanical properties. Moreover, they precipitate into high-pressure He bubbles, further decreasing the strength. Metallic alloys with a high density of interfaces and/or grain boundaries can reduce or even heal the defects caused by irradiation; nevertheless, the detrimental effect of He atoms is still a concern and diffusion of He atoms in the vicinity of interfaces is the subject of active research. Here, we present an ab initio study to explore how the electric field influences the diffusion of He atoms in (HCP-BCC) Zr-Nb metallic multilayer composite before they start to agglomerate. Motivated by our previous work, where we showed that He atoms tend to agglomerate into the regions with low electron density, we utilized the shift of electrons inside Zr-Nb multilayer system due to the external field to manipulate the migration of He atoms in a preferred direction. The results indicate that He atoms can be guided along the direction of the field out of the system, especially along [00 02] direction in HCP-Zr. (C) 2021 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Helium migration in Zr-Nb multilayers under electric field

Popis výsledku anglicky

The alpha particles, which appear during the nuclear reactions and are transformed into He atoms, are often implanted into (or produced in) the structural materials causing deterioration of the mechanical properties. Moreover, they precipitate into high-pressure He bubbles, further decreasing the strength. Metallic alloys with a high density of interfaces and/or grain boundaries can reduce or even heal the defects caused by irradiation; nevertheless, the detrimental effect of He atoms is still a concern and diffusion of He atoms in the vicinity of interfaces is the subject of active research. Here, we present an ab initio study to explore how the electric field influences the diffusion of He atoms in (HCP-BCC) Zr-Nb metallic multilayer composite before they start to agglomerate. Motivated by our previous work, where we showed that He atoms tend to agglomerate into the regions with low electron density, we utilized the shift of electrons inside Zr-Nb multilayer system due to the external field to manipulate the migration of He atoms in a preferred direction. The results indicate that He atoms can be guided along the direction of the field out of the system, especially along [00 02] direction in HCP-Zr. (C) 2021 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

1873-4820

Svazek periodika

555

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000686064900001

EID výsledku v databázi Scopus

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