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

doi:10.1103/PhysRevB.99.134101

This content will become publicly available on April 4, 2020

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:: Renganathan, P. ; Turneaure, Stefan J. ; Sharma, Surinder M. ; Gupta, Y. M.

Publication Date:: 2019-04-04

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.

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                    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.

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                    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.

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@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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Free Publicly Accessible Full Text
This content will become publicly available on April 4, 2020
Publisher's Version of Record
10.1103/PhysRevB.99.134101
https://doi.org/10.1103/PhysRevB.99.134101

Works referenced in this record:

Two-dimensional detector software: From real detector to idealised image or two-theta scan
journal, January 1996

Hammersley, A. P.; Svensson, S. O.; Hanfland, M.
High Pressure Research, Vol. 14, Issue 4-6, p. 235-248
DOI: 10.1080/08957959608201408

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

Journal Article Renganathan, P. ; Turneaure, Stefan J. ; Sharma, Surinder M. ; ... April 2019 - Physical Review B

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 duringmore » release.« less
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Determining the temporal evolution of twinning and/or dislocation slip, in real time (nanoseconds), in single crystals subjected to plane shock wave loading is a long-standing scientific need. Non-cubic crystals pose special challenges because they have many competing slip and twinning systems. Here, we report on time-resolved, in situ, synchrotron Laue x-ray diffraction measurements during shock compression and release of magnesium single crystals that are subjected to compression along the c-axis. Significant twinning was observed directly during stress release following shock compression; during compression, only dislocation slip was observed. Our measurements unambiguously distinguish between twinning and dislocation slip on nanosecond timescalesmore »« less
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Journal Article Turneaure, Stefan J. ; Sharma, Surinder M. ; Gupta, Y. M. September 2018 - Physical Review Letters

In situ, time-resolved, x-ray diffraction and simultaneous continuum measurements were used to examine structural changes in Si shock compressed to 54 GPa. Shock melting was unambiguously established above ~31–33 GPa, through the vanishing of all sharp crystalline diffraction peaks and the emergence of a single broad diffraction ring. Reshock from the melt boundary results in rapid (nanosecond) recrystallization to the hexagonal-close-packed Si phase and further supports melting. Our results also provide new constraints on the high-temperature, high-pressure Si phase diagram.

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

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