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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 4    August 2003

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Interface between metallic film from
Fe-Ni-C system and HPHT as-grown
diamond single crystal
XU Bin(许 斌)1, LI Mu-sen(李木森)2, YIN Long-wei(尹龙卫)2,
LIU Yu-xian(刘玉先)2, CUI Jian-jun(崔建军)2, GONG Jian-hong(宫建红)

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 isnt 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

ISSN 1672-7029
CN 43-1423/U

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