Transformations in the medium-range order of fused silica under high pressure.
Molecular dynamics simulations of fused silica at shock pressures reproduce the experimental equation of state of this material and explain its characteristic shape. We demonstrate that shock waves modify the medium-range order of this amorphous system, producing changes that are only clearly revealed by its ring size distribution. The ring size distribution remains practically unchanged during elastic compression but varies continuously after the transition to the plastic regime.
Dávila
Lílian P
LP
Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California 95616, USA. lpdavila@ucdavis.edu
Caturla
Maria-José
MJ
Kubota
Alison
A
Sadigh
Babak
B
Díaz de la Rubia
Tomás
T
Shackelford
James F
JF
Risbud
Subhash H
SH
Garofalini
Stephen H
SH