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High Pressure Single Crystal Diffraction at PX^2
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Published on: January 16, 2017

Diamond at 800 GPa.

D K Bradley1, J H Eggert, R F Smith

  • 1Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA.

Physical Review Letters
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel compression technique to study solids up to the terapascal (TPa) regime. This method achieved unprecedented pressures, compressing diamond to 1400 GPa and revealing its stability at extreme stress levels.

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Area of Science:

  • Condensed matter physics
  • High-pressure science
  • Materials science

Background:

  • Understanding material behavior under extreme pressures is crucial for various scientific fields.
  • Previous studies were limited in achieving and measuring pressures in the terapascal (TPa) regime.
  • The equation of state for solids at ultra-high pressures remains an active area of research.

Purpose of the Study:

  • To introduce a new compression technique capable of reaching the TPa pressure regime.
  • To investigate the equation of state and material strength of diamond under extreme compression.
  • To achieve and report the highest solid compression pressures to date.

Main Methods:

  • Development of a novel compression technique enabling quasi-isentropic compression of solids.
  • Application of the technique to compress diamond to a peak pressure of 1400 GPa.
  • Measurement of diamond stress-density data up to 800 GPa.

Main Results:

  • Successfully compressed diamond to 1400 GPa, a factor of 5 higher than previous ramp compression records.
  • Collected stress-density data for diamond up to 800 GPa.
  • The diamond phase demonstrated stability and significant material strength at pressures up to 800 GPa.

Conclusions:

  • The new technique provides unprecedented access to the TPa pressure regime for solid-state studies.
  • Diamond exhibits remarkable stability and strength at ultra-high pressures.
  • The reported data represent the highest-pressure solid equation-of-state measurements ever achieved.