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Atomic‐scale mechanisms of densification in cold‐compressed borosilicate glasses
Author(s) -
Lee KuoHao,
Yang Yongjian,
Ding Linfeng,
Ziebarth Benedikt,
Davis Mark J.,
Mauro John C.
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17681
Subject(s) - borosilicate glass , materials science , compression (physics) , deformation (meteorology) , atomic units , molecular dynamics , composite material , mineralogy , chemical physics , chemistry , physics , computational chemistry , quantum mechanics
Knowledge of the underlying structural response during deformation processes is essential for understanding the macroscopic mechanical response of glass. Here we present results from cold compression‐decompression molecular dynamics (MD) simulations of two multicomponent borosilicate glasses, Borofloat ® 33 (Boro33) and N‐BK7 ® (N‐BK7). Our results suggest that the densification of these two borosilicate glasses involves different types of structural changes. The fraction of permanent densification can be correlated to the change in intermediate‐range structure. By performing Voronoi analysis, we quantify the contributions to densification from different cation types in these two multicomponent borosilicate glasses, finding that 3‐coordinated cations facilitate the densification process. Higher‐coordinated cations are relatively stable and can even show a slight expansion in their Voronoi volume.