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Interphase Boundary Layer-Dominated Strain Mechanisms in Cu + Implanted Zr-Nb Nanoscale Multilayers

51 Pages Posted: 3 Aug 2020 Publication Status: Accepted

See all articles by N. Daghbouj

N. Daghbouj

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

M. Callisti

University of Cambridge - Department of Materials Science and Metallurgy

H. S. Sen

Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague

M. Karlik

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

J. Čech

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

M. Vronka

nstitute of Physics, Czech Academy of Sciences

V. Havránek

Nuclear Physics Institute CAS

J. Čapek

Department of SolidState Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

P. Minárik

Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University

P. Bábor

CEITEC -Central European Institute of Technology, Brno University of Technology

T. Polcar

Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague

Abstract

Sputter-deposited Zr/Nb nanoscale metallic multilayers with a periodicity of 27 (thin) and 96 nm (thick) were subjected to Cu+ implantation with low and high fluences and then studied using various experimental techniques in combination with DFT calculations. After Cu+ implantation, the thinner multilayer exhibited a tensile strain along c-axis in Nb layers and a compressive strain in Zr layers, while the thicker multilayer showed a compressive strain in both layers. The strain is higher in the thin multilayer and even further pronounced for high fluence. We developed a mathematical method for the fundamental understanding of the deformation mechanisms in metallic multilayers subjected to radiation damage. In the model, the cumulative strain within a layer is described as the combination of two contributions coming from the interfacial region and the inner region of the layers. The semi-analytical model predicts that the interfacial strain is dominant and extends over a certain region around the interface. Predictions are well supported by ab-initio calculations which show that in the vicinity of the interface and in the Zr side, vacancy and interstitials (low energy barriers) exhibit high mobility compared to the Nb side, thus resulting in a high recombination rate. As a consequence, less strain occurs in the Zr side of the interface compared to the Nb side. The density and distribution of various types of defects along the ion profile (low and high damaged regions) are obtained by combining DFT results and the predictions of the model.

Suggested Citation

Daghbouj, N. and Callisti, M. and Sen, H. S. and Karlik, M. and Čech, J. and Vronka, M. and Havránek, V. and Čapek, J. and Minárik, P. and Bábor, P. and Polcar, T., Interphase Boundary Layer-Dominated Strain Mechanisms in Cu + Implanted Zr-Nb Nanoscale Multilayers. Available at SSRN: https://ssrn.com/abstract=3655869 or http://dx.doi.org/10.2139/ssrn.3655869

N. Daghbouj (Contact Author)

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague ( email )

Czech Republic

M. Callisti

University of Cambridge - Department of Materials Science and Metallurgy ( email )

Trinity Ln
Cambridge, CB2 1TN
United Kingdom

H. S. Sen

Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague ( email )

Czech Republic

M. Karlik

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

Czech Republic

J. Čech

Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

M. Vronka

nstitute of Physics, Czech Academy of Sciences

V. Havránek

Nuclear Physics Institute CAS

J. Čapek

Department of SolidState Engineering, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

P. Minárik

Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University

P. Bábor

CEITEC -Central European Institute of Technology, Brno University of Technology

T. Polcar

Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague

Czech Republic

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