Terapascal static pressure generation with ultrahigh yield strength nanodiamond

Titelangaben

Dubrovinskaia, Natalia ; Dubrovinsky, Leonid ; Solopova, Natalia ; Abakumov, Artem M. ; Turner, Stuart ; Hanfland, Michael ; Bykova, Elena ; Bykov, Maxim ; Prescher, Clemens ; Prakapenka, Vitali B. ; Petitgirard, Sylvain ; Chuvashova, Irina ; Gasharova, Biliana ; Mathis, Yves-Laurent ; Ershov, Petr ; Snigireva, Irina ; Snigirev, Anatoly:
Terapascal static pressure generation with ultrahigh yield strength nanodiamond.
In: Science Advances. Bd. 2 (2016) Heft 7 . - e1600341.
ISSN 2375-2548
DOI: https://doi.org/10.1126/sciadv.1600341

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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.