期刊
SCRIPTA MATERIALIA
卷 58, 期 7, 页码 541-544出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.11.007
关键词
transmission electron microscopy (TEM); composites; layered structures and superlattices; microstructure; ion beam methods : implantation
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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