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Title: Melting curve and phase diagram of vanadium under high-pressure and high-temperature conditions

Journal Article · · Physical Review B
 [1];  [2];  [3];  [1];  [4];  [5];  [6]
  1. Univ. of Valencia (Spain)
  2. Atomic Weapons Establishment, Reading (United Kingdom)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Edinburgh, Scotland (United Kingdom)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. European Synchrotron Radiation Facility (ESRF), Grenoble (France)

We discuss melting curve and phase diagram of vanadium under high-pressure and high-temperature conditions We report a combined experimental and theoretical study of the melting curve and the structural behavior of vanadium under extreme pressure and temperature. We performed powder x-ray-diffraction experiments up to 120 GPa and 4000 K, determining the phase boundary of the body-centered cubic-to-rhombohedral transition and melting temperatures at different pressures. Melting temperatures have also been established from the observation of temperature plateaus during laser heating, and the results from the density-functional theory calculations. Results obtained from our experiments and calculations are fully consistent and lead to an accurate determination of the melting curve of vanadium. These results are discussed in comparison with previous studies. The melting temperatures determined in this study are higher than those previously obtained using the speckle method, but also considerably lower than those obtained from shockwave experiments and linear muffin-tin orbital calculations. Finally, a high-pressure, high-temperature equation of state up to 120 GPa and 2800 K has also been determined.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1598961
Report Number(s):
LLNL-JRNL-789108; PRBMDO; 984567; TRN: US2103749
Journal Information:
Physical Review B, Vol. 100, Issue 9; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (1)

Topological Equivalence of the Phase Diagrams of Molybdenum and Tungsten journal January 2020