Atomic core structure and mobility of ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Atomic core structure and mobility of [100](010) and [010](100) dislocations in MgSiO3 perovskite
Auteur(s) :
Hirel, Pierre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Kraych, Antoine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Carrez, Philippe [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Cordier, Patrick [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Kraych, Antoine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Carrez, Philippe [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Cordier, Patrick [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Titre de la revue :
Acta Materialia
Numéro :
79
Pagination :
117-125
Date de publication :
2014
Mot(s)-clé(s) en anglais :
Computer simulation
Perovskites
Crystal plasticity
Dislocations
Pressure-dependent plasticity
Perovskites
Crystal plasticity
Dislocations
Pressure-dependent plasticity
Discipline(s) HAL :
Planète et Univers [physics]/Sciences de la Terre
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Résumé en anglais : [en]
The plastic behavior of MgSiO3 perovskite is investigated under pressure conditions similar to those encountered in the Earth’s lower mantle. The core structures of dislocations with edge and screw characters are determined ...
Lire la suite >The plastic behavior of MgSiO3 perovskite is investigated under pressure conditions similar to those encountered in the Earth’s lower mantle. The core structures of dislocations with edge and screw characters are determined by means of atomic-scale simulations for the [1 0 0](0 1 0) and [0 1 0](1 0 0) slip systems. The corresponding Peierls stresses increase monotonously with increasing pressure. The edge [0 1 0](1 0 0) dislocation is found to dissociate by climb and to become sessile at high pressure ( GPa). These findings are compared with a continuum Peierls–Nabarro model and with published results in other perovskite materials.Lire moins >
Lire la suite >The plastic behavior of MgSiO3 perovskite is investigated under pressure conditions similar to those encountered in the Earth’s lower mantle. The core structures of dislocations with edge and screw characters are determined by means of atomic-scale simulations for the [1 0 0](0 1 0) and [0 1 0](1 0 0) slip systems. The corresponding Peierls stresses increase monotonously with increasing pressure. The edge [0 1 0](1 0 0) dislocation is found to dissociate by climb and to become sessile at high pressure ( GPa). These findings are compared with a continuum Peierls–Nabarro model and with published results in other perovskite materials.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Projet Européen :
Établissement(s) :
Université de Lille
ENSCL
CNRS
INRA
ENSCL
CNRS
INRA
Collections :
Équipe(s) de recherche :
Plasticité
Date de dépôt :
2019-05-16T16:44:35Z
2020-04-16T14:18:03Z
2020-04-16T14:18:03Z
Fichiers
- 1-s2.0-S1359645414004972-main.pdf
- Version éditeur
- Accès libre
- Accéder au document