Arrest of He bubble growth in Cu-Nb multilayer nanocomposites

作者：Hattar K; Demkowicz M J^*; Misra A; Robertson I M; Hoagland R G

来源：Scripta Materialia, 2008, 58(7): 541-544.

DOI：10.1016/j.scriptamat.2007.11.007

• 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.

• 出版日期2008-4