Boron Nitride Revisied
Access this Article
Search this Article
The phase diagram published by Bundy & Wentorf  already shows cBN to be the stable fonn of boron nitride, in contrast to similar diagrams used today. This picture is supported by theoretical calculations by Maid et al.  and Solozhenko . Results of compressibility measurements for cBN and hBN are presented . To clarify the picture of the phase diagram the transformation from hBN to cBN has been studied in a series of time dependent diffraction experiments using synchrotron radiation. The crystallization is found to go through the melt. In a second series of experiments the back-transformation of cBN to hBN was studied . Finally the experimental conditions for high pressure! high temperature synthesis of cBN could be lowered to 2. 5 GPa at 1800°C using amorphous boron nitride as starting material.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 975-979, 1998
The Japan Society of High Pressure Science and Technology