Melting of lead under high pressure studied using second-scale time-resolved x-ray diffraction
- DIF/Departement de Physique Theorique et Appliquee, CEA, Boite Postale 12, 91680 Bruyeres-le-Chatel (France)
- European Synchrotron Radiation Facility, Boite Postale 220, F-38043 Grenoble Cedex (France)
The high pressure and high temperature phase diagram of lead has been studied up to 80 GPa and 3700 K in a laser-heated diamond anvil cell. Melting and solid-solid phase transitions have been followed with a second scale by in situ synchrotron time-resolved x-ray diffraction. The detection of the x-ray signal scattered by the liquid was used as an objective criterion for melting. We evidenced that the melting phenomenon in a diamond anvil cell has a typical lifetime that can be as low as 1 s. Unlike a previous laser-heated diamond anvil cell study, the measured melting curve is in agreement with melting points detected using dynamic compression and confirms the predictions of ab initio calculations. The pressure-temperature conditions of the hcp-bcc phase transition have been measured, and the hcp-bcc-liquid triple point has been located around 39 GPa and 2400 K.
- OSTI ID:
- 21052709
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 14 Vol. 76; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BCC LATTICES
DIAMONDS
HCP LATTICES
LASERS
LEAD
LIQUIDS
MELTING
MELTING POINTS
PHASE DIAGRAMS
PRESSURE RANGE GIGA PA
PRESSURE RANGE MEGA PA 10-100
SOLIDS
SYNCHROTRONS
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TIME RESOLUTION
TRIPLE POINT
X RADIATION
X-RAY DIFFRACTION