Suppression of Spontaneous Nucleation and Seeded Growth of Diamond
- Murli H. Manghnani and
- Yasuhiko Syono
Published Online: 21 MAR 2013
Copyright © 1987 by Terra Scientific Publishing Company (TERRAPUB), Tokyo.
High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto
How to Cite
Wakatsuki, M. and Takano, K. J. (1987) Suppression of Spontaneous Nucleation and Seeded Growth of Diamond, in High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto (eds M. H. Manghnani and Y. Syono), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM039p0203
- Published Online: 21 MAR 2013
- Published Print: 1 JAN 1987
Print ISBN: 9780875900667
Online ISBN: 9781118664124
- Mineralogy and Crystal Chemistry;
- Phase transformations;
- High Pressure-High Temperature Research
In the flux method of growing diamonds from graphite, the spontaneous nucleation of the diamond is suppressed, if graphite particles are regrown and cover the surface of the starting graphite prior to the diamond nucleation. The minimum pressure necessary for diamond formation from the regrowth-treated graphite (P*) is higher than that from fresh graphite (P 0), by 0.19 GPa at 1350°C with an alloy of Fe-Ni-Co employed as the flux. As an application of this suppressive effect, a seed crystal of diamond, located between the graphite and the flux, can be grown epitaxially by a two-stage pressure cycle. The first stage of the cycle is at a pressure lower than P 0 allowing the regrowth of graphite. The second stage is for the growth of the seed to occur at a sustained elevated pressure level. Crystals up to 2 mm in diameter have been grown.