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Title: Pressure, stress, and strain distribution in the double-stage diamond anvil cell

Double stage diamond anvil cells (DACs) of two designs have been assembled and tested. We used a standard symmetric DAC with flat or beveled culets as a primary stage and CVD microanvils machined by a focused ion beam as a second. We evaluated pressure, stress, and strain distributions in gold and a mixture of gold and iron as well as in secondary anvils using synchrotron x-ray diffraction with a micro-focused beam. A maximum pressure of 240 GPa was reached independent of the first stage anvil culet size. We found that the stress field generated by the second stage anvils is typical of conventional DAC experiments. The maximum pressures reached are limited by strains developing in the secondary anvil and by cupping of the first stage diamond anvil in the presented experimental designs. Also, our experiments show that pressures of several megabars may be reached without sacrificing the first stage diamond anvils.
Authors:
 [1] ;  [2] ; ;  [3] ; ;  [4] ;  [1] ;  [5] ;  [1] ;  [6] ;  [6]
  1. Geophysical Laboratory, Carnegie Institution of Washington, Washington, District of Columbia 20015 (United States)
  2. (Russian Federation)
  3. Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60632 (United States)
  4. Photon Science DESY, D-22607 Hamburg (Germany)
  5. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics CAS, Beijing 100029 (China)
  6. (China)
Publication Date:
OSTI Identifier:
22489538
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHEMICAL VAPOR DEPOSITION; DIAMONDS; DISTRIBUTION; GOLD; ION BEAMS; IRON; PRESSURE RANGE GIGA PA; STRAINS; STRESSES; SYMMETRY; X-RAY DIFFRACTION