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Title: X-ray diffraction of molybdenum under shock compression to 450 GPa

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [2];  [4]
  1. Princeton Univ., Princeton, NJ (United States); Princeton University
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of Rochester, Rochester, NY (United States)
  4. Princeton Univ., Princeton, NJ (United States)

Molybdenum (Mo) is a body-centered-cubic (bcc) transition metal that has widespread technological applications. Although the bcc transition elements are used as test cases for understanding the behavior of metals under extreme conditions, the melting curves and phase transitions of these elements have been the subject of stark disagreements in recent years. Here we use x-ray diffraction to examine the phase stability and melting behavior of Mo under shock loading to 450 GPa. The bcc phase of Mo remains stable along the Hugoniot until 380 GPa. Here, our results do not support previous claims of a shallow melting curve for molybdenum.

Research Organization:
Princeton Univ., Princeton, NJ (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0000856; NA0002154; AC52-07NA27344
OSTI ID:
1337781
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 17 Vol. 92; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Measurements of the sound velocity of shock-compressed liquid silica to 1100 GPa journal December 2016
Ab initio inspection of thermophysical experiments for molybdenum near melting journal December 2018
Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility journal December 2019
Intensification of shock damage through heterogeneous phase transition and dislocation loop formation due to presence of pre-existing line defects in single crystal Cu journal November 2019
Ab initio calculations of the elastic and thermodynamic properties of gold under pressure journal February 2017
Short-wavelength free-electron laser sources and science: a review journal October 2017
Nanosecond Melting and Recrystallization in Shock-Compressed Silicon journal September 2018
Short-wavelength free-electron laser sources and science: a review text January 2017
Generalization of the Unified Analytic Melt-Shear Model to Multi-Phase Materials: Molybdenum as an Example journal February 2019