Competing mechanisms on the strength of ion-irradiated Zr/Nb nanoscale multilayers: Interface strength versus radiation hardening

SCRIPTA MATERIALIA

卷:152

Article

Callisti, M.¹  Karlik, M.^2,3  Polcar, T.^4,5 

[1] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Dept Mat, Trojanova 13, Prague 12000 2, Czech Republic

[3] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, Ke Karlovu 5, CR-12116 Prague 2, Czech Republic

[4] Univ Southampton, Fac Engn & Environm, Natl Ctr Adv Tribol Southampton, Southampton SO17 1BJ, Hants, England

[5] Czech Tech Univ, Fac Elect Engn, Dept Control Engn, Tech 2, Prague 6, Czech Republic

关键词: Radiation hardening;    Interfaces;    Multilayers;    Transmission electron microscopy (TEM);    Nanoindentation;   

DOI  :  10.1016/j.scriptamat.2018.03.039

来源: Elsevier

【 摘 要 】

The structural stability and mechanical properties of sputter-deposited Zr/Nb nanoscale multilayers subjected to Si-ion irradiation were investigated in relation to the individual layer thickness. The interface density distribution played a major role on the nature and amount of accumulated radiation damage. The multilayer with a smaller periodicity experienced a significantly higher atomic-scale disorder and radiation hardening compared to the multilayer with thicker individual layers. In the latter case, an enhanced radiation damage tolerance was achieved due to the balance between competing deformation mechanisms. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved

【 授权许可】

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