Structures and energies of twist grain ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Structures and energies of twist grain boundaries in Mg2SiO4 forsterite
Auteur(s) :
Furstoss, Jean [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Hirel, Pierre [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Carrez, Philippe [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Gouriet, Karine [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Meko-Fotso, Victoire [Auteur]
Cordier, Patrick [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations (UMET) - UMR 8207
Hirel, Pierre [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Carrez, Philippe [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Gouriet, Karine [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Meko-Fotso, Victoire [Auteur]
Cordier, Patrick [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Titre de la revue :
Computational Materials Science
Numéro :
233
Pagination :
112768
Éditeur :
Elsevier BV
Date de publication :
2024-01
ISSN :
0927-0256
Discipline(s) HAL :
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Résumé en anglais : [en]
In this work, we investigate twist grain boundary (GB) energies and structures in Mg2SiO4 forsterite using atomistic simulations. We first present a new bond orientational order parameter allowing to highlight disordered ...
Lire la suite >In this work, we investigate twist grain boundary (GB) energies and structures in Mg2SiO4 forsterite using atomistic simulations. We first present a new bond orientational order parameter allowing to highlight disordered regions in this low-symmetry crystal for which classical visualization tools are ineffective. Then we examine three GB planes, (010), (120) and (001), corresponding to the most favorable free surfaces of this crystal. We show that twist GB follow the same energy ordering as corresponding free surfaces. In addition, except for some misorientation angles and for the (120) GB plane, GB energies and structures are quite insensitive to microscopic translational degrees of freedom. The dislocation composition of low-angle twist GB can be related to ��-surfaces in the corresponding planes, and are in good agreement with first-principle calculations. It is also shown that the dislocation core structures in low angle twist GB can strongly differ from the ones of intracrystalline dislocations.Lire moins >
Lire la suite >In this work, we investigate twist grain boundary (GB) energies and structures in Mg2SiO4 forsterite using atomistic simulations. We first present a new bond orientational order parameter allowing to highlight disordered regions in this low-symmetry crystal for which classical visualization tools are ineffective. Then we examine three GB planes, (010), (120) and (001), corresponding to the most favorable free surfaces of this crystal. We show that twist GB follow the same energy ordering as corresponding free surfaces. In addition, except for some misorientation angles and for the (120) GB plane, GB energies and structures are quite insensitive to microscopic translational degrees of freedom. The dislocation composition of low-angle twist GB can be related to ��-surfaces in the corresponding planes, and are in good agreement with first-principle calculations. It is also shown that the dislocation core structures in low angle twist GB can strongly differ from the ones of intracrystalline dislocations.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Projet Européen :
Projet ANR :
Établissement(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Équipe(s) de recherche :
Plasticité
Date de dépôt :
2024-01-03T14:56:00Z
2024-01-17T15:36:59Z
2024-01-17T15:36:59Z
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