Interface-dependent nucleation in nanostructured layered composites

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. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.