Discussions on the Formation Mechanism of the HPHT Synthetic Polycrystalline Diamond from Fe-C(H) System
详细信息
- 责任者：Yang Zhijun (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Liang Rong
- 刊名：Acta Mineralogica Sinica
- 出版年：2010
- 卷期：30(4)
- 关键词：金刚石 ; diamond
- 页码：p.405-410
- 图表：3 illus., 19 refs.
- 分类号：0700
- issnNo：ISSN1000-4734
- isbnNo：CN52-1045/P
摘要
The HPHT synthetic polycrystalline diamonds form Fe-C (H) system have an unevenly clustered distribution on the disk. Diamond grains randomly oriented in Polycrystalline have octahedral habit and different sizes. Also, there are Zigzag stripes on the gain surfaces and widespread development of plastic deformation and other defects in the diamond grains. The diamond grain boundaries are clear and solid contact mutant. Based on the crystal nucleation and crystal growth theory, only parts of experimental results of the polycrystalline can be explained. The usage of carbon atom coordination tetrahedron growth units model in explaining the formation mechanism of the polycrystalline entails further studying. The indepth analysis of the formation mechanism of the high pressure-high temperature synthetic polycrystalline diamond from Fe-C(H) system will not only optimize diamond synthesis craft and improve the grade of the polycrystalline diamond, but also provide scientific clues for the formation mechanisms of natural polycrystalline diamond.