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Title: Hugoniot, sound speed, and phase transitions of single-crystal sapphire for pressures 0.2–2.1 TPa

Journal Article · · Physical Review. B

Sapphire (Al2O3) is a major constituent of the Earth's mantle and has significant contributions to the field of high-pressure physics. Constraining its Hugoniot over a wide pressure range and identifying the location of shock-driven phase transitions allows for development of a multiphase equation of state and enables its use as an impedance-matching standard in shock physics experiments. In this paper we present measurements of the principal Hugoniot and sound velocity from direct impact experiments using magnetically launched flyers on the Z machine at Sandia National Laboratories. The Hugoniot was constrained for pressures from 0.2–2.1 TPa and a four-segment piecewise linear shock-velocity–particle-velocity fit was determined. First-principles molecular dynamics simulations were conducted and agree well with the experimental Hugoniot. Sound-speed measurements identified the onset of melt between 450 and 530 GPa, and the Hugoniot fit refined the onset to 525 ± 13 GPa. A phase diagram which incorporates literature diamond-anvil cell data and melting measurements is presented.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525
OSTI ID:
2311563
Report Number(s):
SAND-2023-09353J
Journal Information:
Physical Review. B, Vol. 107, Issue 21; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (53)

Absence of an aluminous phase in the upper part of the Earth's lower mantle journal July 1994
High-Pressure Transformation of Al2O3 journal November 1997
Generalized Gradient Approximation Made Simple journal October 1996
Projector augmented-wave method journal December 1994
Transition from the Rh 2 O 3 ( II ) -to- Ca Ir O 3 structure and the high-pressure-temperature phase diagram of alumina journal July 2005
Laser interferometer for measuring high velocities of any reflecting surface journal November 1972
Magnetically driven hyper-velocity launch capability at the Sandia Z accelerator journal June 2011
An experimental study of the garnet-perovskite transformation in the system MgSiO3Mg3Al2Si3O12 journal August 1996
Comparison of dynamic compression behavior of single crystal sapphire to polycrystalline alumina journal June 2011
Electronic spin state of iron in lower mantle perovskite journal September 2004
Dispersion-equation coefficients for the refractive index and birefringence of calcite and quartz crystals journal May 1999
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Entropy-dominated dissipation in sapphire shock-compressed up to 400 GPa (4 Mbar) journal March 2010
Refraction and Dispersion of Synthetic Sapphire journal January 1962
The Elastic Behaviour of a Crystalline Aggregate journal May 1952
Absolute measurement of the Hugoniot and sound velocity of liquid copper at multimegabar pressures journal November 2017
Specific volume measurements of Cu, Mo, Pd, and Ag and calibration of the ruby R 1 fluorescence pressure gauge from 0.06 to 1 Mbar journal June 1978
High precision Hugoniot measurements on statically pre-compressed fluid helium journal September 2016
Prediction of an U2S3-type polymorph of Al2O3 at 3.7 Mbar journal May 2008
Response of seven crystallographic orientations of sapphire crystals to shock stresses of 16–86 GPa journal August 2009
Ordinary refractive index of sapphire in uniaxial tension and compression along the c axis journal January 2003
High-pressure experiments on phase transition boundaries between corundum, Rh2O3(II)-and CaIrO3-type structures in Al2O3 journal February 2013
Ab initiomolecular dynamics for liquid metals journal January 1993
Shock compression response of poly(4-methyl-1-pentene) plastic to 985 GPa journal November 2015
Push-pull analysis of photonic Doppler velocimetry measurements journal July 2007
High pressure Hugoniot of sapphire conference January 1994
Accuracy limits and window corrections for photon Doppler velocimetry journal January 2007
Stability and compressibility of the high-pressure phases of Al2O3 up to 200 GPa: Implications for the electrical conductivity of the base of the lower mantle journal June 2006
A new quotidian equation of state (QEOS) for hot dense matter journal January 1988
Investigating phase transitions and strength in single-crystal sapphire using shock–reshock loading techniques journal December 2006
High-pressure phase transformation of corundum (α-Al 2 O 3 ) observed under shock compression journal July 2000
A new global equation of state model for hot, dense matter journal September 1995
Shock-wave compression of sapphire from 15 to 420 kbar. The effects of large anisotropic compressions journal January 1971
High pressure phase transition and strength estimate in polycrystalline alumina during laser-driven shock compression journal December 2022
Measurement of melting temperatures of some minerals under lower mantle pressures journal September 1995
The melting of corundum (Al2O3) under high pressure conditions journal March 2000
Special points for Brillouin-zone integrations journal June 1976
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Shock‐Wave Studies of PMMA, Fused Silica, and Sapphire journal September 1970
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Platinum equation of state to greater than two terapascals: Experimental data and analytical models journal June 2022
Melting and density of MgSiO3 determined by shock compression of bridgmanite to 1254GPa journal February 2021
Sound velocity, shear modulus, and shock melting of beryllium along the Hugoniot journal August 2019
Shock-Induced Transformation of A l 2 O 3 and LiF into Semiconducting Liquids journal July 2003
Review of pulsed power-driven high energy density physics research on Z at Sandia journal July 2020
Restoring the Density-Gradient Expansion for Exchange in Solids and Surfaces journal April 2008
Crystal structure of a high-pressure/high-temperature phase of alumina by in situ X-ray diffraction journal May 2004
Metallization of Fluid Molecular Hydrogen at 140 GPa (1.4 Mbar) journal March 1996
Correction to the velocity‐per‐fringe relationship for the VISAR interferometer journal August 1974
Shock Compression of Quartz to 1.6 TPa: Redefining a Pressure Standard journal November 2009
Shock induced melting of sapphire journal January 2022
Near-absolute Hugoniot measurements in aluminum to 500 GPa using a magnetically accelerated flyer plate technique journal October 2003
Magnetically accelerated, ultrahigh velocity flyer plates for shock wave experiments journal October 2005