Journal
SCRIPTA MATERIALIA
Volume 58, Issue 7, Pages 541-544Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.11.007
Keywords
transmission electron microscopy (TEM); composites; layered structures and superlattices; microstructure; ion beam methods : implantation
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Transmission electron microscopy on Cu-Nb multilayer nanocomposites implanted with 10(17) cm(-2) of 33 keV He-4(+) at 763 K revealed uniformly dispersed He bubbles of 1-2 nm diameter in Nb and a broad distribution of larger ones in Cu. Bubbles in Cu were confined by the neighboring Nb, limiting their size normal to Cu-Nb interfaces to the Cu layer. The conditions under which layered composite morphology may be used to control He bubble distributions in materials under irradiation are discussed. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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