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Interface-dependent nucleation in nanostructured layered composites

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Author(s): Irene J. Beyerlein | Jian Wang | Ruifeng Zhang

Journal: APL Materials
ISSN 2166-532X

Volume: 1;
Issue: 3;
Start page: 032112;
Date: 2013;
Original page

ABSTRACT
Nanocomposite properties are to a large extent governed by interface-associated mechanisms. Via atomic-scale modeling of bi-phase interfaces, we reveal a strong correlation between interface structure and the nucleation of dislocations. We show that the number and types of dislocations that are emitted depend sensitively on a few key structural features of the interface. Based on these insights, a model is developed that connects nucleation propensity with interface structure. This finding implies that tuning interface structure is a conceivable approach for strengthening nanocomposites, one that is distinct from the common strategy of shrinking nanostructure dimensions.

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