The core structure of screw dislocations with [001] Burgers vector in Mg2SiO4 olivine
Artikel i vetenskaplig tidskrift, 2021

In this study, we report atomistic calculations of the core structure of screw dislocations with [001] Burgers vector in Mg SiO olivine. Computations based on the THB1 empirical potential set for olivine show that the stable core configurations of the screw dislocations correspond to a dissociation in {110} planes involving collinear partial dislocations. As a consequence, glide appears to be favorable in {110} planes at low temperature. This study also highlights the difference between dislocation glide mechanism in {110} versus (010) or (100) for which glide is expected to occur through a locking-unlocking mechanism.

Core structure

Atomistic simulations

Olivine

Dislocation glide

Crystal plasticity

Författare

Srinivasan Mahendran

Université de Lille

Chalmers, Fysik, Kondenserad materie- och materialteori

Philippe Carrez

Université de Lille

Patrick Cordier

Université de Lille

Institut Universitaire de France

Comptes Rendus Physique

1631-0705 (ISSN)

Vol. 22 S3

Ämneskategorier

Teoretisk kemi

Kompositmaterial och -teknik

Den kondenserade materiens fysik

DOI

10.5802/CRPHYS.27

Mer information

Senast uppdaterat

2021-05-24