| Effect of Metallic Film in Diamond Growth from an Fe—Ni—C System at High Temperature and High Pressure |
| |
| 作者姓名： | XUBin LIMu-Sen YINALong-Wei CUIJian-Jun GONGJian-Hong |
| |
| 作者单位： | [1]DepartmentofMaterialsScienceandEngineering,ShandongInstituteofArchitectureandEngineering,Ji‘nan250014 [2]CollegeofMaterialsScienceandEngineering,ShandongUniversity,Ji’nan250061 |
| |
| 摘 要： | The metallic film surrounding a diamond single crystal,which plays an important role the diamond growth from and Fe-Ni-C system,has been successfully investigated by using transmission-electron microscopy(TEM),Raman layer(near diamond)of the film by TEM and Raman spectroscopy,but a parallel relationship exists between the(111) plane of γ-(Fe,Ni) and the (100) plane of (Fe2Ni)3C in this region.Compared with that of the film has an increase of 0.9V.According to the microstructures on the film obtained by the TEM.Raman spectra,and XPS,the catalytic mechanism of the film may be assumed as follows.In the surface layer of the film,iron and nickel atoms in the γ-(Fe,Ni) lattice can absorb carbon atoms in the (Fe,Ni)3C lattice and make them transform to an sp^3-like state.Then carbon atoms with the sp^3-like structure are separated from the (Fe,Ni)3C and stack on the growing diamond crystal.This study provides a direct evidence for the diamond growth from a metallic catlayst-graphite system under high temperature and high pressure.
|
| 关 键 词： | 金属薄膜 高温 高压 菱形单晶体 铁－镍－碳体系 电子显微镜 拉曼光谱 微观结构 |
| 本文献已被 维普 等数据库收录！ |
|
