Creation of nanostuctures by extreme conditions: high-pressure synthesis of ultrahard nanocrystalline cubic boron nitride.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22362592.
- Also identified by DOI 10.1002/adma.201104361.
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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.
Medical subject headings
- Boron Compounds
- Nanostructures
- Nanotechnology
- Pressure