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. 2012 Mar 22;24(12):1540-4.
doi: 10.1002/adma.201104361. Epub 2012 Feb 23.

Creation of nanostuctures by extreme conditions: high-pressure synthesis of ultrahard nanocrystalline cubic boron nitride

Vladimir L Solozhenko  1 , Oleksandr O Kurakevych, Yann Le Godec
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Creation of nanostuctures by extreme conditions: high-pressure synthesis of ultrahard nanocrystalline cubic boron nitride

Vladimir L Solozhenko et al. Adv Mater. .

Abstract

The synthesis of high-purity bulk nanostructured cubic boron nitride (cBN) at 20 GPa and 1770 K by direct phase transformation of graphite-like BN with an "ideal random layer" structure is reported. The two-times increase of hardness of nano-cBN (H(V) = 85 GPa) with respect to conventional polycrystalline cBN (H(V) ∼ 45 GPa) is evidently a result of nanosize effects.

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