Characterizing heavy ions-irradiated Zr/Nb: Structure and mechanical properties

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00560394" target="_blank" >RIV/61389005:_____/22:00560394 - isvavai.cz</a>

Alternative codes found

RIV/26722445:_____/22:N0000039 RIV/68407700:21230/22:00358726 RIV/68407700:21340/22:00358726

Result on the web

<a href="https://doi.org/10.1016/j.matdes.2022.110732" target="_blank" >https://doi.org/10.1016/j.matdes.2022.110732</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2022.110732" target="_blank" >10.1016/j.matdes.2022.110732</a>

Result language

angličtina

Original language name

Characterizing heavy ions-irradiated Zr/Nb: Structure and mechanical properties

Original language description

In this work, the radiation responses of Zr/Nb nanostructured metallic multilayers (NMMs) are studied. The nanostructures with different layer thicknesses were deposited on Si (111) substrate by using magnetron sputtering and were subjected to heavy-ion irradiation at room temperature with different fluences. Nanoindentation, XRD, DFT, SIMS, and Variable Energy Positron Annihilation Spectroscopy (VEPAS) techniques were used to study the type and distribution of defects, and strain within the material as well as the changes in the hardness of the structures as a function of damage. Our results suggest that the strain and the irradiation hardening are layer thickness- and damage-dependent while they are independent of the type of irradiated ions. The magnitude of hardening decreases with decreasing individual layer thickness indicating that the number of interfaces has a direct effect on the radiation tolerance enhancement. For thin layers with a periodicity of 27 nm (Zr/Nb27), a transition from hardening to softening occurs at high fluence, and a saturation point is reached in thick layers with a periodicity of 96 nm (Zr/Nb96). The as-deposited thin multilayers presented a significantly higher atomic-scale disorder which increases with ion irradiation compared to the thick multilayers. VEPAS reveals the vacancy defects before and after irradiation that contribute to the presented strain. Based on the findings, thin nanostructured Zr/Nb multilayered structures possess excellent radiation resistance due to the high density of interfaces that act as sinks for radiation-induced point defects.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Materials and Design

ISSN

0264-1275

e-ISSN

1873-4197

Volume of the periodical

219

Issue of the periodical within the volume

JUL

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

110732

UT code for WoS article

000808151400008

EID of the result in the Scopus database

2-s2.0-85130960268