The origin of deformation induced topological anisotropy in silica glass

Ganisetti VNS, Atila A, Guénolé J, Prakash A, Horbach J, Wondraczek L, Bitzek E (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Acta Materialia Elsevier

Book Volume: 257

Article Number: 119108

DOI: 10.1016/j.actamat.2023.119108

Abstract

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 (SiO2) glass under mechanical loads. The anisotropy observed in silica glass originates from a preferred orientation of SiO4 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.

Authors with CRIS profile

Venkata Naga Sudheer Ganisetti Professur für Datenbasierte Materialmodellierung Achraf Atila Professur für Datenbasierte Materialmodellierung Lothar Wondraczek
Erik Bitzek Professur für Datenbasierte Materialmodellierung

Involved external institutions

Université de Lorraine FR France (FR) Heinrich-Heine-Universität Düsseldorf DE Germany (DE) Technische Universität Bergakademie Freiberg DE Germany (DE) Friedrich-Schiller-Universität Jena DE Germany (DE)

How to cite

APA:

Ganisetti, V.N.S., Atila, A., Guénolé, J., Prakash, A., Horbach, J., Wondraczek, L., & Bitzek, E. (2023). The origin of deformation induced topological anisotropy in silica glass. Acta Materialia, 257. https://doi.org/10.1016/j.actamat.2023.119108

MLA:

Ganisetti, Venkata Naga Sudheer, et al. "The origin of deformation induced topological anisotropy in silica glass." Acta Materialia 257 (2023).

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