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Terapascal static pressure generation with ultrahigh yield strength nanodiamond.

Natalia Dubrovinskaia1, Leonid Dubrovinsky2, Natalia A Solopova3

  • 1Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany.

Science Advances
|July 26, 2016
PubMed
Summary

Researchers developed novel nanocrystalline diamond microballs, achieving record-breaking yield strength. These advanced materials enable ultrahigh static pressure generation beyond 1 TPa for scientific discovery.

Keywords:
Ultra-high static pressure generationdouble-stage diamond anvil cellnanodiamondterapascal pressures

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • High-Pressure Science

Background:

  • Understanding materials properties at extreme pressures is crucial for scientific advancement.
  • Current high-pressure research is limited by the strength of materials used in devices.
  • Developing new materials is key to pushing the boundaries of static pressure generation.

Purpose of the Study:

  • To synthesize and characterize novel bulk nanocrystalline diamond microballs.
  • To evaluate their potential for generating ultrahigh static pressures.
  • To explore their suitability for x-ray optical applications.

Main Methods:

  • High-pressure and high-temperature synthesis techniques.
  • Mechanical property testing, including yield strength and hardness measurements.
  • Synchrotron X-ray diffraction for pressure determination beyond 1 TPa in a diamond anvil cell.

Main Results:

  • Optically transparent bulk nanocrystalline diamond microballs were successfully synthesized.
  • Exceptional yield strength of ~460 GPa at ~70 GPa confining pressure was recorded.
  • Pressures exceeding 1 TPa were reliably generated using these microballs in a diamond anvil cell.

Conclusions:

  • The synthesized nanodiamond balls possess outstanding mechanical properties, including high yield strength and hardness.
  • They represent a unique and effective device for ultrahigh static pressure generation.
  • Their properties make them promising for advanced x-ray optical applications.