The Origin of Deformation Induced Topological Anisotropy in Silica Glass - LEM3 - Laboratoire d'étude des Microstructures et de Mécanique des Matériaux Accéder directement au contenu
Article Dans Une Revue Acta Materialia Année : 2023

The Origin of Deformation Induced Topological Anisotropy in Silica Glass

Résumé

Oxide glasses with a network structure are omnipresent in daily life. Often, they are regarded as isotropic materials; however, structural anisotropy can be induced through processing in mechanical fields and leads to unique materials properties. Unfortunately, due to the lack of local, atomic-scale analysis methods, the microscopic mechanisms leading to anisotropy remained elusive. Using novel analysis methods on glasses generated by molecular dynamics simulations, this paper provides a microscopic understanding of topological anisotropy in silica (SiO$_2$) glass under mechanical loads. The anisotropy observed in silica glass originates from a preferred orientation of SiO$_4$ tetrahedra at both short- and medium-range levels that can be controlled via the mode of mechanical loading. The findings elucidate the relation between the deformation protocol and the resulting anisotropic structure of the silica network (involving both persistent and transient effects), and thus provide important insight for the design of oxide glasses with tailored materials properties.
Fichier principal
Vignette du fichier
Ganisetti23AM_anisotropy-silica-glass_Guenole_Bitzek.pdf (1.52 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03820234 , version 1 (11-07-2023)

Identifiants

Citer

Sudheer Ganisetti, Achraf Atila, Julien Guénolé, Aruna Prakash, Jürgen Horbach, et al.. The Origin of Deformation Induced Topological Anisotropy in Silica Glass. Acta Materialia, 2023, 257, pp.119108. ⟨10.1016/j.actamat.2023.119108⟩. ⟨hal-03820234⟩
39 Consultations
24 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More