The effect of temperature on bubble lattice formation in copper under in situ He ion irradiation

SCRIPTA MATERIALIA

卷:131

Article

Robinson, Aidan M.¹  Edmondson, Philip D.^1,4  English, Colin²  Lozano-Perez, Sergio¹  Greaves, Graeme³  Hinks, Jonathan A.³  Donnelly, Stephen E.³  Grovenor, Chris R. M.¹ 

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Culham Sci Ctr, NNL, Abingdon OX14 3DB, Oxon, England

[3] Univ Huddersfield, Sch Comp & Engn, Huddersfield HD1 3DH, W Yorkshire, England

[4] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

关键词: Bubble lattice;    Self-interstitial atoms;    In situ ion irradiation;    Copper;   

DOI  :  10.1016/j.scriptamat.2016.12.031

来源: Elsevier

【 摘 要 】

In situ ion irradiation in a transmission electron microscope was used to investigate the effects of temperature on radiation-induced bubble lattice formation in Cu by low energy (12 keV) helium ions. Bubble lattices were observed to form between - 100 and 100 degrees C, but at 200 degrees C lattice formation was impeded by continued growth and agglomeration of bubbles. Both nucleation of bubbles, and to a lesser extent bubble lattice formation, are observed at lower fluences as temperature increases, which we suggest is due to increased point defect mobility. Previous work on point defect concentrations in irradiated copper is considered when interpreting these results. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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