Structural response of α-quartz under plate-impact shock compression
- Princeton Univ., NJ (United States); Carnegie Inst. of Science, Washington, DC (United States). Geophysical Lab.; Institute for Shock Physics, Washington State University
- Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics
- Princeton Univ., NJ (United States)
Because of its far-reaching applications in geophysics and materials science, quartz has been one of the most extensively examined materials under dynamic compression. Despite 50 years of active research, questions remain concerning the structure and transformation of SiO2 under shock compression. Continuum gas-gun studies have established that under shock loading quartz transforms through an assumed mixed-phase region to a dense high-pressure phase. While it has often been assumed that this high-pressure phase corresponds to the stishovite structure observed in static experiments, there have been no crystal structure data confirming this. In this study, we use gas-gun shock compression coupled with in situ synchrotron x-ray diffraction to interrogate the crystal structure of shock-compressed α-quartz up to 65 GPa. Our results reveal that α-quartz undergoes a phase transformation to a disordered metastable phase as opposed to crystalline stishovite or an amorphous structure, challenging long-standing assumptions about the dynamic response of this fundamental material.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- Grant/Contract Number:
- NA0002007; NA0003957
- OSTI ID:
- 1673435
- Alternate ID(s):
- OSTI ID: 1680033
- Journal Information:
- Science Advances, Journal Name: Science Advances Journal Issue: 35 Vol. 6; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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