Effect of Metallic Film in Diamond Growth from an Fe-Ni-C System at High Temperature and High Pressure
XU Bin1, LI Mu-Sen2, YIN Long-Wei2, CUI Jian-Jun2, GONG Jian-Hong2
1Department of Materials Science and Engineering, Shandong Institute of Architecture and Engineering, Ji’nan 250014
2College of Materials Science and Engineering, Shandong University, Ji’nan 250061
Effect of Metallic Film in Diamond Growth from an Fe-Ni-C System at High Temperature and High Pressure
1Department of Materials Science and Engineering, Shandong Institute of Architecture and Engineering, Ji’nan 250014
2College of Materials Science and Engineering, Shandong University, Ji’nan 250061
Abstract： The metallic film surrounding a diamond single crystal, which plays an important role in the diamond growth from an Fe-Ni-C system, has been successfully investigated by using transmission electron microscopy (TEM), Raman spectroscopy and x-ray photo-electron spectroscopy (XPS). Diamond and graphite were not found in surface layer (near diamond) of the film by TEM and Raman spectroscopy, but a parallel relationship exists between the (1ī ī) plane of γ-(Fe,Ni) and the (100) plane of (Fe,Ni)3C in this region. Compared to that of solvent metal (catalyst) near diamond, the binding energy in the valence bands of iron, nickel and carbon atoms of the film has an increase of 0.9 eV. 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 sp3-like state. Then carbon atoms with the sp3-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 catalyst-graphite system under high temperature and high pressure.
XU Bin;LI Mu-Sen;YIN Long-Wei;CUI Jian-Jun;GONG Jian-Hong. Effect of Metallic Film in Diamond Growth from an Fe-Ni-C System at High Temperature and High Pressure[J]. 中国物理快报, 2003, 20(5): 759-762.
XU Bin, LI Mu-Sen, YIN Long-Wei, CUI Jian-Jun, GONG Jian-Hong. Effect of Metallic Film in Diamond Growth from an Fe-Ni-C System at High Temperature and High Pressure. Chin. Phys. Lett., 2003, 20(5): 759-762.
2003, Vol. 20 
