中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 4 August 2003 |
Fe-Ni-C system and HPHT as-grown
diamond single crystal
LIU Yu-xian(劉玉先)2, CUI Jian-jun(崔建軍)2, GONG Jian-hong(宮建紅)2
（1. Department of Materials Science and Engineering,
Shandong Institute of Architecture and Engineering, Ji′nan 250014, China
2. College of Materials Science and Engineering,
Shandong University, Ji′nan 250061, China;）
Abstract:Microstructures of surface layer (near diamond) of the metallic film from Fe-Ni-C system are composed of (Fe,Ni)3C,(Fe,Ni)23C6and γ-(Fe,Ni), from which it can be assumed that graphite isnt directly catalyzed into diamond through the film and there exists a transition phase (Fe,Ni)3C that can decompose into diamond structure. AFM morphologies on the film/diamond interface are traces preserved after carbon groups moving from the film to diamond. The morphologies on the as-grown diamond are similar to those on corresponding films, being spherical on (100) face and sawtooth-like steps on (111) face. Diamond growth rates and temperature gradients in boundary layer of the molten film at HPHT result in morphology differences.
Key words: Fe-Ni-C alloy; synthetic diamond; metallic film; interface
