金刚石合成中某些现象的分析与研究^①

来源期刊：中国有色金属学报1996年第1期

论文作者：张建安 刘树桢

文章页码：136 - 139

关键词：成份起伏； 金刚石； 触媒合金； 合成机理

Key words：Ni-base catalyst； diamond synthesis ； composition gradient

摘    要：采用SEM和EPA技术对NiFeMn触媒合金在金刚石合成中的一些现象作了研究并探讨了触媒合金在高压合成下的作用机理。研究表明，经高温高压合成后NiFeMn触媒片表面存在局部成份起伏，Fe原子在金属/石墨界面及金属/金刚石界面富集；这种成份(浓度)起伏对金刚石晶体的形核与生长都有一定影响。

Abstract: Some phenomena of NiFeMn catalyst occurred during the growth of synthetic diamond from liquid-metal catalyst，have been studied by means of SEM and EPA methods，and the mechanism of the catalyst in dia-mond synthesis has been brought forward in this paper. The results showed that a local composition gradient might be observed in catalyst surface during diamond growth at high temperature and pressure, and Fe element accumu-fated in metal/graphite and metal/diamond boundaries. This composition segregation plays an important part in di-amond crystal nucleation and growth process and benefits the carbon atoms migration in metal-catalyst as well.