Interface between metallic film from
Fe-Ni-C system and HPHT as-grown
diamond single crystal
Fe-Ni-C system and HPHT as-grown
diamond single crystal
(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;)
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