Journal
SCRIPTA MATERIALIA
Volume 63, Issue 9, Pages 929-932Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.07.009
Keywords
Cu alloys; Thin films; Nanostructures; Implantation
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Funding
- US DoE-BES [DEFG02-05ER46217]
- NSF [DMR 08-04615]
- US Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0804615] Funding Source: National Science Foundation
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The stability of model nanostructured Cu90M10 10 and Cu90W10 alloys during irradiation with 1.8 MeV Kr+ at very high temperatures was investigated. Significant coarsening occurs only above similar to 0.6T(m) in Cu90M10 and similar to 0.8T(m) in Cu90W10 (T-m is the melting point of Cu). Below these temperatures, nanoprecipitates nucleate and grow to a saturation diameter of similar to 4 nm. These very small nanoprecipitates confer remarkable microstructural stability, with the Cu grain size remaining below 40 nm. Computer simulations help to explain why these nanostructures are so stable. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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