Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Measurement of Body-Centered Cubic Gold and Melting under Shock Compression

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Carnegie Inst. of Washington, Washington, D.C. (United States)

We combined laser shock compression with in situ x-ray diffraction to probe the crystallographic state of gold (Au) on its principal shock Hugoniot. Au has long been recognized as an important calibration standard in diamond anvil cell experiments due to the stability of its face-centered cubic (fcc) structure to extremely high pressures (P > 600 GPa at 300 K). This is in contrast to density functional theory and first principles calculations of the high-pressure phases of Au that predict a variety of fcc-like structures with different stacking arrangements at intermediate pressures. In this Letter, we probe high-pressure and high-temperature conditions on the shock Hugoniot and observe fcc Au at 169 GPa and the first evidence of body-centered cubic (bcc) Au at 223 GPa. Upon further compression, the bcc phase is observed in coexistence with liquid scattering as the Hugoniot crosses the Au melt curve before 322 GPa. Here, the results suggest a triple point on the Au phase diagram that lies very close to the principal shock Hugoniot near ~220 GPa.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1559920
Alternate ID(s):
OSTI ID: 1545434
OSTI ID: 1545878
OSTI ID: 1571907
Report Number(s):
LLNL-JRNL--782110; 961726
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 123; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (26)

Shock adiabatic curves of metals: New data, statistical analysis, and general laws journal January 1981
In situ X-ray diffraction measurement of shock-wave-driven twinning and lattice dynamics journal October 2017
Toroidal diamond anvil cell for detailed measurements under extreme static pressures journal July 2018
Femtosecond diffraction studies of solid and liquid phase changes in shock-compressed bismuth journal November 2018
Measurement of the Very‐High‐Pressure Properties of Materials using a Light‐Gas Gun journal August 1966
Equation of State for Nineteen Metallic Elements from Shock‐Wave Measurements to Two Megabars journal July 1960
Hugoniot measurement of gold at high pressures of up to 580GPa journal February 2008
Tabular equation of state for gold
  • Boettger, Jonathan; Honnell, Kevin G.; Peterson, Jeffrey H.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2011: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.3686402
conference January 2012
The Dynamic Compression Sector laser: A 100-J UV laser for dynamic compression research journal May 2019
The laser shock station in the dynamic compression sector. I journal May 2019
DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration journal May 2015
Two-dimensional detector software: From real detector to idealised image or two-theta scan journal January 1996
Ab initio calculations of the elastic and thermodynamic properties of gold under pressure journal February 2017
Shock-Wave Compressions of Twenty-Seven Metals. Equations of State of Metals journal October 1957
Theoretical prediction of a phase transition in gold journal April 2001
Comment on “Theoretical prediction of phase transition in gold” journal November 2002
Theoretical extension of the gold pressure calibration standard beyond 3 Mbars journal May 2003
Equations of state of six metals above 94 GPa journal September 2004
Ultrahigh-pressure scales for gold and platinum at pressures up to 550 GPa journal September 2009
Pressure-induced stacking sequence variations in gold from first principles journal December 2013
Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa journal January 2017
Structural Transformation and Melting in Gold Shock Compressed to 355 GPa journal July 2019
Noblest of All Metals Is Structurally Unstable at High Pressure journal January 2007
HiSPoD : a program for high-speed polychromatic X-ray diffraction experiments and data analysis on polycrystalline samples journal June 2016
Terapascal static pressure generation with ultrahigh yield strength nanodiamond journal July 2016
Terapascal static pressure generation with ultrahigh yield strength nanodiamond text January 2016

Cited By (4)

Superionic State in Alumina Produced by Nonthermal Melting journal January 2020
Challenges to model the role of heterogeneities on the shock response and spall failure of metallic materials at the mesoscales journal December 2019
Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg journal January 2020
Structural Transformation and Melting in Gold Shock Compressed to 355 GPa journal July 2019

Figures / Tables (5)


Similar Records

Structural Transformation and Melting in Gold Shock Compressed to 355 GPa
Journal Article · Wed Jul 24 00:00:00 EDT 2019 · Physical Review Letters · OSTI ID:1545791

Structural Transformation and Melting in Gold Shock Compressed to 355 GPa
Journal Article · Wed Jul 24 00:00:00 EDT 2019 · Physical Review Letters · OSTI ID:1574298