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Sci Adv. 2016 Jul 20;2(7):e1600341. doi: 10.1126/sciadv.1600341. eCollection 2016 Jul.

Terapascal static pressure generation with ultrahigh yield strength nanodiamond.

Author information

1
Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany.
2
Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
3
Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany.; Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
4
Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
5
European Synchrotron Radiation Facility, BP 220 F-38043 Grenoble Cedex, France.
6
Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60437, USA.
7
Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany.
8
ANKA Synchrotron Radiation Facility, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany.
9
Immanuel Kant Baltic Federal University, RU-236041 Kaliningrad, Russia.
10
European Synchrotron Radiation Facility, BP 220 F-38043 Grenoble Cedex, France.; Immanuel Kant Baltic Federal University, RU-236041 Kaliningrad, Russia.

Abstract

Studies of materials' properties at high and ultrahigh pressures lead to discoveries of unique physical and chemical phenomena and a deeper understanding of matter. In high-pressure research, an achievable static pressure limit is imposed by the strength of available strong materials and design of high-pressure devices. Using a high-pressure and high-temperature technique, we synthesized optically transparent microballs of bulk nanocrystalline diamond, which were found to have an exceptional yield strength (~460 GPa at a confining pressure of ~70 GPa) due to the unique microstructure of bulk nanocrystalline diamond. We used the nanodiamond balls in a double-stage diamond anvil cell high-pressure device that allowed us to generate static pressures beyond 1 TPa, as demonstrated by synchrotron x-ray diffraction. Outstanding mechanical properties (strain-dependent elasticity, very high hardness, and unprecedented yield strength) make the nanodiamond balls a unique device for ultrahigh static pressure generation. Structurally isotropic, homogeneous, and made of a low-Z material, they are promising in the field of x-ray optical applications.

KEYWORDS:

Ultra-high static pressure generation; double-stage diamond anvil cell; nanodiamond; terapascal pressures

PMID:
27453944
PMCID:
PMC4956398
DOI:
10.1126/sciadv.1600341
[Indexed for MEDLINE]
Free PMC Article

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