Nanoductility in silicate glasses is driven by topological heterogeneity

Bu Wang, Yingtian Yu, Mengyi Wang, John C. Mauro, Mathieu Bauchy

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

The existence of nanoscale ductility during the fracture of silicate glasses remains controversial. Here, based on molecular dynamics simulations coupled with topological constraint theory, we show that nanoductility arises from the spatial heterogeneity of the atomic network's rigidity. Specifically, we report that localized floppy modes of deformation in underconstrained regions of the glass enable plastic deformations of the network, resulting in permanent change in bond configurations. Ultimately, these heterogeneous plastic events percolate, thereby resulting in a nonbrittle mode of fracture. This suggests that nanoductility is intrinsic to multicomponent silicate glasses having nanoscale heterogeneities.

Original languageEnglish (US)
Article number064202
JournalPhysical Review B
Volume93
Issue number6
DOIs
StatePublished - Feb 9 2016

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this