The near-Surface Region of Cubic Boron Nitride Single Crystal from the Li<sub>3</sub>N-hBN System

doi:10.1088/0256-307X/31/4/048101

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Abstract：Cubic boron nitride single crystals are synthesized with lithium nitride as a catalyst under high pressure and high temperature. The main phases in the near-surface region, which around the single crystal are determined as a mixture of hexagonal boron nitride (hBN), cubic boron nitride (cBN) and lithium boron nitride (Li₃BN₂). High resolution transmission electron microscopy examinations show that there exist lots of nanometer-sized cubic boron nitride nuclei in this region. The interface phase structures of cubic boron nitride crystal and its near-surface region are investigated by means of transmission electron microscopy. The growth mechanism of cubic boron nitride crystal is analyzed briefly. It is supposed that Li₃BN₂ impels the direct conversion of hBN to cBN as a real catalyst, and cBN is homogeneously nucleated in the molten state under high pressure and high temperature.

收稿日期: 2013-11-15 出版日期: 2014-03-25

:	81.10.-h	(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
	68.37.Lp	(Transmission electron microscopy (TEM))
	81.16.Hc	(Catalytic methods)

引用本文:

. [J]. 中国物理快报, 2014, 31(04): 48101-048101.
GUO Xiao-Fei, XU Bin, WEN Zhen-Xing, FAN Xiao-Hong, TIAN Bin. The near-Surface Region of Cubic Boron Nitride Single Crystal from the Li₃N-hBN System. Chin. Phys. Lett., 2014, 31(04): 48101-048101.

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https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/31/4/048101 或 https://cpl.iphy.ac.cn/CN/Y2014/V31/I04/48101

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