| Original Articles |
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Surface Structure of Large Synthetic Diamonds by High Temperature and High Pressure |
| ZANG Chuan-Yi1,2;HUANG Guo-Feng2;MA Hong-An1,2;JIA Xiao-Peng1,2 |
| 1Institute of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 4540002Key National Laboratory for Superhard Materials, Jilin University, Changchun 130012 |
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| Cite this article: |
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ZANG Chuan-Yi, HUANG Guo-Feng, MA Hong-An et al 2007 Chin. Phys. Lett. 24 2991-2993 |
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Abstract With NiMnCo and FeCoNi alloys as solvent metals, large single-crystal diamonds of about 3mm across are grown by temperature gradient method
(TGM) under high temperature and high pressure (HPHT). Although both {100} and {111} surfaces are developed by a layer growth mechanism, some different characteristic patterns are seen clearly on the different surfaces, no matter whether NiMnCo or FeCoNi alloys are taken as the solvent metals. For {100} surface, it seems to have been melted or etched greatly, no dendritic patterns to be found, and only a large number of growth hillocks are dispersed net-likely; while for {111} surface, it often seems to be more smooth-faced, no etched or melted traces are present even when a lot of depressed trigonal growth layers. This distinct difference between {111} and {100} surfaces is considered to be related to the difference of surface-atom distribution of different surfaces, and {111} surfaces should be more
difficult to be etched and more steady than {100} surfaces.
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| Keywords:
81.05.Uw
81.10.Aj
81.10.h
68.35.Bs
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Received: 29 March 2007
Published: 20 September 2007
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| PACS: |
81.05.Uw
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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81.10.h
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68.35.Bs
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[5] Zang C Y et al 2006 Chin. Phys. Lett. 23 214
[6] Sumiya H, Toda N and Satoh S 2002 J. Cryst. Growth 237 1281
[7] Zang C Y et al 2004 Chin. Phys. Lett. 21 1648
[8] Jia X et al 1999 Diamond Relat. Mater. 8 1895
[9] Kanda H et al 2000 Brazilian Journal of Physics 30 482
[10] Jia X et al 1998 Review of High Pressure Science andTechnology 7 998 |
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