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Title: Structural transformations including melting and recrystallization during shock compression and release of germanium up to 45 GPa

Solid-solid and solid-liquid transformations were examined in Ge(100), using in situ x-ray diffraction measurements during uniaxial strain compression and release. For final stresses above 15.7 GPa, the Ge transformed to a highly textured tetragonal β-Sn phase. At 31.5 GPa and above, Ge transformed to the molten phase. Full stress release (uniaxial strain) from the β-Sn phase, from the melt boundary, and from the completely molten phase, resulted in reversion to an untextured cubic diamond (cd) phase. These findings demonstrate that the cd to β-Sn phase change is reversible, and that recrystallization from the liquid phase occurs on nanosecond timescales during release.
Authors:
; ; ;
Publication Date:
Grant/Contract Number:
NA0002442; NA0002007; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 13; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1504945
Alternate Identifier(s):
OSTI ID: 1504944; OSTI ID: 1505006

Renganathan, P., Turneaure, Stefan J., Sharma, Surinder M., and Gupta, Y. M.. Structural transformations including melting and recrystallization during shock compression and release of germanium up to 45 GPa. United States: N. p., Web. doi:10.1103/PhysRevB.99.134101.
Renganathan, P., Turneaure, Stefan J., Sharma, Surinder M., & Gupta, Y. M.. Structural transformations including melting and recrystallization during shock compression and release of germanium up to 45 GPa. United States. doi:10.1103/PhysRevB.99.134101.
Renganathan, P., Turneaure, Stefan J., Sharma, Surinder M., and Gupta, Y. M.. 2019. "Structural transformations including melting and recrystallization during shock compression and release of germanium up to 45 GPa". United States. doi:10.1103/PhysRevB.99.134101.
@article{osti_1504945,
title = {Structural transformations including melting and recrystallization during shock compression and release of germanium up to 45 GPa},
author = {Renganathan, P. and Turneaure, Stefan J. and Sharma, Surinder M. and Gupta, Y. M.},
abstractNote = {Solid-solid and solid-liquid transformations were examined in Ge(100), using in situ x-ray diffraction measurements during uniaxial strain compression and release. For final stresses above 15.7 GPa, the Ge transformed to a highly textured tetragonal β-Sn phase. At 31.5 GPa and above, Ge transformed to the molten phase. Full stress release (uniaxial strain) from the β-Sn phase, from the melt boundary, and from the completely molten phase, resulted in reversion to an untextured cubic diamond (cd) phase. These findings demonstrate that the cd to β-Sn phase change is reversible, and that recrystallization from the liquid phase occurs on nanosecond timescales during release.},
doi = {10.1103/PhysRevB.99.134101},
journal = {Physical Review B},
number = 13,
volume = 99,
place = {United States},
year = {2019},
month = {4}
}

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