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

Multi-phase equation of state of ultrapure hafnium to 120 GPa

Journal Article · · Journal of Physics. Condensed Matter
Hafnium (Hf) is an industrially important material due to its large neutron absorption cross-section and its high corrosion resistance. When subjected to high pressure, Hf phase transforms from its hexagonal close packed α-Hf phase to the hexagonal ω-Hf phase. Upon further compression, ω-Hf phase transforms to the body centered cubic β-Hf phase. In this study, the high pressure phase transformations of Hf are studied by compressing and decompressing a well-characterized Hf sample in diamond anvil cells up to 120 GPa while collecting x-ray diffraction data. The phase transformations of Hf were compared in both a He pressure transmitting medium (PTM) and no PTM over several experiments. It was found that the α-Hf to ω-Hf phase transition occurs at a higher pressure during compression and lower pressure during decompression with a helium (He) PTM compared to using no PTM. Finally, there was little difference in the ω-Hf to β-Hf phase transition pressure between the He PTM and no PTM. The equation of state was fit for all three phases of Hf and under both PTM and no-PTM.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
LDRD; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA). Office of Experimental Sciences
Grant/Contract Number:
89233218CNA000001; AC02-06CH11357
OSTI ID:
1839690
Alternate ID(s):
OSTI ID: 1853928
Report Number(s):
LA-UR-21-24396; 170237
Journal Information:
Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 5 Vol. 34; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

The influence of texture, strain rate, temperature, and chemistry on the mechanical behavior of hafnium journal July 2004
Impurity effects and reaction kinetics of the pressure-induced α → ω transformation in Ti journal January 1977
Effect of interstitial solutes on the strength and ductility of titanium journal January 1981
The influence of interstitial oxygen and peak pressure on the shock loading behavior of zirconium journal April 2005
Experimental constraints on the phase diagram of titanium metal journal October 2008
The influence of grain size and texture on the mechanical response of high purity hafnium journal May 2007
Pressure-induced transition in titanium metal a systematic study of the effects of uniaxial stress journal January 2005
Diamond cells and new materials journal November 2005
Elasticity and constitution of the Earth's interior journal June 1952
Impurities block the α to ω martensitic transformation in titanium journal January 2005
The influence of oxygen content on the α to ω phase transformation and shock hardening of titanium journal July 2006
Influence of impurities on the α to ω phase transition in zirconium under dynamic loading conditions journal December 2009
Investigation of a→w transformation in the Zr‐Hf system to 42 GPa journal March 1981
The equation of state of platinum to 660 GPa (6.6 Mbar) journal October 1989
High P-T phase transitions and P-V-T equation of state of hafnium journal June 2012
Reinvestigation of high pressure polymorphism in hafnium metal journal June 2014
Developments in time-resolved high pressure x-ray diffraction using rapid compression and decompression journal July 2015
Preface: High-pressure studies with x-rays journal July 2015
Experimental and first-principles studies on the elastic properties of α-hafnium metal under pressure journal March 2016
The α–ω phase transition in shock-loaded titanium journal July 2017
Cinema:Snap: Real-time tools for analysis of dynamic diamond anvil cell experiment data journal October 2021
DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration journal May 2015
Studies on pressure-induced phase transition in zirconium journal September 1992
Structure phase transition and elastic properties of hafnium: First-principles study journal January 2011
Hydrostatic limits of 11 pressure transmitting media journal March 2009
Effects of interstitial impurities on the high pressure martensitic α to ω structural transformation and grain growth in zirconium journal March 2011
LAMBDA 2M GaAs—A multi-megapixel hard X-ray detector for synchrotrons journal January 2018
Structural phase stability in nanocrystalline titanium to 161 GPa journal September 2014
Crystal structures of group IVa metals at ultrahigh pressures journal October 1990
Equations of state of six metals above 94 GPa journal September 2004
Phonon mode softening and elastic properties of hafnium under pressure journal May 2018
Orientation Relations During the α - ω Phase Transition of Zirconium: In Situ Texture Observations at High Pressure and Temperature journal November 2013
New high-pressure phase transition in zirconium metal journal January 1990
Diamond anvil cell and high-pressure physical investigations journal January 1983
GSAS-II : the genesis of a modern open-source all purpose crystallography software package journal March 2013
The Extreme Conditions Beamline P02.2 and the Extreme Conditions Science Infrastructure at PETRA III journal June 2015
Crystal Structures of Titanium, Zirconium, and Hafnium at High Pressures journal April 1963
First-principles investigation of the phase stability of zirconium journal November 1997

Similar Records

The phase diagram of Ti-6Al-4V at high-pressures and high-temperatures
Journal Article · Wed Feb 17 19:00:00 EST 2021 · Journal of Physics. Condensed Matter · OSTI ID:1781304

Reinvestigation of high pressure polymorphism in hafnium metal
Journal Article · Sat Jun 21 00:00:00 EDT 2014 · Journal of Applied Physics · OSTI ID:22303993