Titre :

Interaction between dislocation and vacancies in magnesium oxide: Insights from atomistic simulations and elasticity theory

Auteur(s) :

Landeiro Dos Reis, Marie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Carrez, Philippe [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Cordier, Patrick [Auteur]
Institut universitaire de France [IUF]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Titre de la revue :

Physical Review Materials

Nom court de la revue :

Phys. Rev. Materials

Numéro :

5

Pagination :

063602

Éditeur :

American Physical Society (APS)

Date de publication :

2021-06-04

ISSN :

2475-9953

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Planète et Univers [physics]/Sciences de la Terre

Résumé en anglais : [en]

We determine the interaction between an 1/2<110>{-110} edge dislocation and charged vacancies in MgO, using both molecular static simulations and the elasticity theory developed in the framework of the elastic dipole ...
Lire la suite >We determine the interaction between an 1/2<110>{-110} edge dislocation and charged vacancies in MgO, using both molecular static simulations and the elasticity theory developed in the framework of the elastic dipole approach. In this study, the confrontation of these two methods highlights the specific role of the dislocation core structure on the interaction. We thus show that in MgO, the edge dislocation core, within a region across the glide planes that expands over several Burgers vector, is strongly attractive for vacancies, especially those of oxygen. However, the resulting pinning force on the dislocation remains weak and should not contribute to a significant hardening.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet Européen :

Rheology of Earth materials: closing the gap between TIMEscales in the laboratory and in the MANtle

Projet ANR :

ULNE

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Plasticité

Date de dépôt :

2021-06-07T16:51:08Z
2021-06-09T10:47:09Z