Fine Structural and Carbon Source Analysis for Diamond Crystal Growth using an Fe-Ni-C System at High Pressure and High Temperature
Fine Structural and Carbon Source Analysis for Diamond Crystal Growth using an Fe-Ni-C System at High Pressure and High Temperature
复制标题
使用 Fe-Ni-C 系统在高压和高温下进行金刚石晶体生长的精细结构和碳源分析
DOI：
10.1088/0256-307x/29/4/048102
复制
发表时间：
2012-04
影响因子：
3.5
通讯作者：
Tian Bin
中科院分区：
文献类型：
--
作者：
Fan Xiao-Hong;Xu Bin;Niu Zhen;Zhai Tong-Guang;Tian Bin
在Fe-Ni-C体系中高温高压合成金刚石，用电子能量损失谱仪测量了不同厚度金刚石与催化剂膜界面上Csp 3的含量分布。结果表明，当测量位置位于金刚石内表面附近时，Csp 3含量在87.33%~ 78.15%之间变化，当测量位置位于金刚石外表面6 μm时，Csp 3含量在87.33%~ 78.15%之间变化。透射电子显微镜观察表明，界面上存在Fe 3C、γ-（Fe，Ni）和石墨等不同的相，但石墨相向界面内逐渐减少。这些结果深刻地表明，金刚石生长所需的碳原子只能来自富碳相Fe_3C，而不是直接来自石墨。在高温高压条件下合成金刚石时，界面处石墨中的碳原子可能首先与Fe原子反应生成碳化物Fe 3C。Fe 3C最终在界面处分解成具有sp3电子态的碳原子，形成金刚石。
Diamond is synthesized in an Fe-Ni-C system at high pressure and high temperature, the Csp3 content profile through different thicknesses of interface between diamond and the catalyst film is measured by using electron energy loss spectroscopy. It is found that the Csp3 content varies from 87.33% to 78.15% when the measured position is located at the inner face near the diamond and then changes to 6 μm further away. Transmission electron microscope examinations show that there are different phases in the interface, such as Fe3C, γ-(Fe,Ni), and graphite, but the graphite phase diminishes gradually towards the inner face of the interface. These results profoundly indicate that the carbon atoms, required for diamond growth, could only come from the carbon-rich phase, Fe3C, but not directly from the graphite. It is possible that carbon atoms from the graphite in the interface first react with Fe atoms to produce carbide Fe3C during diamond synthesis at high pressure and high temperature. The Fe3C finally decomposes into carbon atoms with the sp3 electron state at the interface to form the diamond.
登录
查看更多内容
影响因子：
4.4
作者：
H. M. Strong;R. E. Hanneman
通讯作者：
H. M. Strong;R. E. Hanneman
DOI：
10.1021/cen-v033n008.p718
发表时间：
1961-06
影响因子：
--
作者：
I. Sunagawa
通讯作者：
I. Sunagawa
影响因子：
64.8
作者：
BUNDY, FP;HALL, HT;WENTORF, RH
通讯作者：
WENTORF, RH
DOI：
10.1016/0141-6359(83)90121-6
发表时间：
1979-02
期刊：
--
影响因子：
--
作者：
J. Field
通讯作者：
J. Field
DOI：
10.1016/0921-5107(92)90213-s
发表时间：
1992-01
影响因子：
3.6
作者：
R. Caveney
通讯作者：
R. Caveney