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Evidence of two plastic regimes controlled by dislocation nucleation in silicon nanostructures
Abstract : We performed molecular dynamics simulations of silicon nanostructures submitted to various stresses and temperatures. For a given stress orientation, a transition in the onset of silicon plasticity is revealed depending on the temperature and stress magnitude. At high temperature and low stress, partial dislocation loops are nucleated in the {111} glide set planes. But at low temperature and very high stress, perfect dislocation loops are formed in the other set of {111} planes called shuffle. This result confirmed by three different classical potentials suggests that plasticity in silicon nanostructures could be controlled by dislocation nucleation.
https://hal.univ-lille.fr/hal-02510296
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : mardi 17 mars 2020 - 16:18:44
Dernière modification le : mercredi 20 octobre 2021 - 03:22:17
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : mardi 17 mars 2020 - 16:18:44
Dernière modification le : mercredi 20 octobre 2021 - 03:22:17