X-ray Imaging of Stress and Strain of Diamond, Iron, and Tungsten at Megabar Pressures

DOI Web Site 被引用文献5件
  • Russell J. Hemley
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • Ho-kwang Mao
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • Guoyin Shen
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • James Badro
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • Philippe Gillet
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • Michael Hanfland
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
  • Daniel Häusermann
    R. J. Hemley, H.-k. Mao, G. Shen, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.

書誌事項

公開日
1997-05-23
DOI
  • 10.1126/science.276.5316.1242
公開者
American Association for the Advancement of Science (AAAS)

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説明

<jats:p>Synchrotron x-ray imaging and stress measurements of diamond-anvil cell gaskets revealed large elastic strains at the diamond tip at a pressure of 300 gigapascals. The diamond, generally considered a rigid body, bent 16 degrees over a distance of 300 micrometers without failure. To complement these measurements, a technique was developed that permits x-ray diffraction to be measured through a beryllium gasket. Measurements on tungsten and iron revealed the strain anisotropy, deviatoric stress, and texture and showed that the yield strengths of these materials increase by up to two orders of magnitude at confining pressures of 200 to 300 gigapascals. The results allow identification of the maximum amount of strain accommodated by the anvil tips before failure. Further development of ultrahigh pressure techniques requires relieving stress concentrations associated with this large elastic deformation.</jats:p>

収録刊行物

  • Science

    Science 276 (5316), 1242-1245, 1997-05-23

    American Association for the Advancement of Science (AAAS)

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