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Structural and mechanical properties of ?-irradiated Zr/Nb multilayer nanocomposites

Structural and mechanical properties of ?-irradiated Zr/Nb multilayer nanocomposites
Structural and mechanical properties of ?-irradiated Zr/Nb multilayer nanocomposites
Zr/Nb multilayers with periodicities of 10, 30 and 60 nm were prepared by magnetron sputtering and irradiated for prolonged time (1311 h) by ?-rays with energy of 1.25 MeV and a dose of 510 kGy. A qualitative comparison between XRD patterns acquired before and after irradiation revealed a progressive increase of compressive stress, especially in Nb layers, for smaller periodicities with a consequent increase in hardness measured by nanoindentation. The combination of smaller grain size and radiation-induced defect density distribution, primarily in Nb layers, was found to be responsible for the observed radiation hardening effect.
multilayers, irradiation embrittlement, scanning/transmission electron microscopy
0167-577X
138-141
Callisti, Mauro
c752bde7-436d-4c04-8033-3255cb289777
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Sergio, Lozano-Perez
7920c3d3-4706-48dc-8d1e-af043a7d78e1
Callisti, Mauro
c752bde7-436d-4c04-8033-3255cb289777
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Sergio, Lozano-Perez
7920c3d3-4706-48dc-8d1e-af043a7d78e1

Callisti, Mauro, Polcar, T. and Sergio, Lozano-Perez (2016) Structural and mechanical properties of ?-irradiated Zr/Nb multilayer nanocomposites. Materials Letters, 163, 138-141. (doi:10.1016/j.matlet.2015.10.057).

Record type: Article

Abstract

Zr/Nb multilayers with periodicities of 10, 30 and 60 nm were prepared by magnetron sputtering and irradiated for prolonged time (1311 h) by ?-rays with energy of 1.25 MeV and a dose of 510 kGy. A qualitative comparison between XRD patterns acquired before and after irradiation revealed a progressive increase of compressive stress, especially in Nb layers, for smaller periodicities with a consequent increase in hardness measured by nanoindentation. The combination of smaller grain size and radiation-induced defect density distribution, primarily in Nb layers, was found to be responsible for the observed radiation hardening effect.

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Accepted/In Press date: 12 October 2015
e-pub ahead of print date: 23 October 2015
Published date: 15 January 2016
Keywords: multilayers, irradiation embrittlement, scanning/transmission electron microscopy
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 383332
URI: https://eprints.soton.ac.uk/id/eprint/383332
ISSN: 0167-577X
PURE UUID: 95ff5d6d-2768-4ce1-9a1a-bc8b7955c650
ORCID for T. Polcar: ORCID iD orcid.org/0000-0002-0863-6287

Catalogue record

Date deposited: 12 Nov 2015 11:35
Last modified: 15 Aug 2019 00:37

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