通过极端条件制造纳米结构：超硬纳米晶立方氮化硼的高压合成。

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

机构信息

LSPM-CNRS, Université Paris Nord, 99 avenue J.-B. Clément, Villetaneuse, France.

出版信息

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

DOI:10.1002/adma.201104361

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.

摘要

本文报道了在 20 GPa 和 1770 K 条件下，通过具有“理想随机层”结构的类石墨 BN 的直接相转变合成高纯块状纳米结构立方氮化硼(cBN)。纳米 cBN 的硬度比传统多晶 cBN 提高了两倍(H(V) = 85 GPa)，这显然是纳米尺寸效应的结果。