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Title: In situ X-Ray Diffraction of Shock-Compressed Fused Silica

Abstract

Because of its widespread applications in materials science and geophysics, SiO 2 has been extensively examined under shock compression. Both quartz and fused silica transform through a so-called “mixed-phase region” to a dense, low compressibility high-pressure phase. For decades, the nature of this phase has been a subject of debate. Proposed structures include crystalline stishovite, another high-pressure crystalline phase, or a dense amorphous phase. Here we use plate-impact experiments and pulsed synchrotron x-ray diffraction to examine the structure of fused silica shock compressed to 63 GPa. In contrast to recent laser-driven compression experiments, we find that fused silica adopts a dense amorphous structure at 34 GPa and below. When compressed above 34 GPa, fused silica transforms to untextured polycrystalline stishovite. Our results can explain previously ambiguous features of the shock-compression behavior of fused silica and are consistent with recent molecular dynamics simulations. Stishovite grain sizes are estimated to be ~5–30nm for compression over a few hundred nanosecond time scale.

Authors:
 [1];  [2];  [1]
  1. Princeton Univ., NJ (United States)
  2. Washington State Univ., Pullman, WA (United States)
Publication Date:
Research Org.:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1464952
Alternate Identifier(s):
OSTI ID: 1430380; OSTI ID: 1476635
Grant/Contract Number:  
NA0002442; NA0002007; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Tracy, Sally June, Turneaure, Stefan J., and Duffy, Thomas S. In situ X-Ray Diffraction of Shock-Compressed Fused Silica. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.135702.
Tracy, Sally June, Turneaure, Stefan J., & Duffy, Thomas S. In situ X-Ray Diffraction of Shock-Compressed Fused Silica. United States. https://doi.org/10.1103/PhysRevLett.120.135702
Tracy, Sally June, Turneaure, Stefan J., and Duffy, Thomas S. Thu . "In situ X-Ray Diffraction of Shock-Compressed Fused Silica". United States. https://doi.org/10.1103/PhysRevLett.120.135702. https://www.osti.gov/servlets/purl/1464952.
@article{osti_1464952,
title = {In situ X-Ray Diffraction of Shock-Compressed Fused Silica},
author = {Tracy, Sally June and Turneaure, Stefan J. and Duffy, Thomas S.},
abstractNote = {Because of its widespread applications in materials science and geophysics, SiO 2 has been extensively examined under shock compression. Both quartz and fused silica transform through a so-called “mixed-phase region” to a dense, low compressibility high-pressure phase. For decades, the nature of this phase has been a subject of debate. Proposed structures include crystalline stishovite, another high-pressure crystalline phase, or a dense amorphous phase. Here we use plate-impact experiments and pulsed synchrotron x-ray diffraction to examine the structure of fused silica shock compressed to 63 GPa. In contrast to recent laser-driven compression experiments, we find that fused silica adopts a dense amorphous structure at 34 GPa and below. When compressed above 34 GPa, fused silica transforms to untextured polycrystalline stishovite. Our results can explain previously ambiguous features of the shock-compression behavior of fused silica and are consistent with recent molecular dynamics simulations. Stishovite grain sizes are estimated to be ~5–30nm for compression over a few hundred nanosecond time scale.},
doi = {10.1103/PhysRevLett.120.135702},
url = {https://www.osti.gov/biblio/1464952}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 13,
volume = 120,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Azimuthally integrated X-ray diffraction data collected for a series of plate impact experiments with peak stress states between 17 and 63 GPa. Stishovite peaks are labelled with hkl values.

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Works referenced in this record:

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    Works referencing / citing this record:

    Nanosecond Melting and Recrystallization in Shock-Compressed Silicon
    journal, September 2018


    Sound Velocities in Shock‐Synthesized Stishovite to 72 GPa
    journal, December 2019


    Atomistic mechanisms of crack nucleation and propagation in amorphous silica
    journal, July 2019


    Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg
    journal, January 2020


      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.