Pressure generation to 125 GPa using a 6-8-2 type multianvil apparatus with nano-polycrystalline diamond anvils

Pressures to about 125 GPa at room temperature have been confirmed by synchrotron in situ X-ray observations, using a newly designed triple-stage (6-8-2) multianvil apparatus with nano-polycrystalline diamond (NPD) as the third-stage opposed anvils. Upon heating the sample at a fixed press load (500...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-03, Vol.215 (1), p.012190
Main Authors: Kunimoto, T, Irifune, T
Format: Article
Language:English
Subjects:
Anvils
Heating
Phase transitions
Physics
Polycrystalline diamond
Polycrystals
Room temperature
Synchrotrons
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Summary:Pressures to about 125 GPa at room temperature have been confirmed by synchrotron in situ X-ray observations, using a newly designed triple-stage (6-8-2) multianvil apparatus with nano-polycrystalline diamond (NPD) as the third-stage opposed anvils. Upon heating the sample at a fixed press load (500 tons), the pressure stayed virtually the same at temperatures to 1100 K, while it decreased to 83.7 GPa when the temperature was further increased to 1300 K. This pressure was maintained for 2 hours without notable decrease during the heating. The present 6-8-2 system can be used in studies of in situ X-ray observation of phase transitions under these pressures, which are far higher than those achieved in conventional Kawai-type multianvil 6-8 system.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/215/1/012190