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。
Some phenomena of NiFeMn catalyst occurred during the growth of synthetic diamond from liquidmetal catalyst, have been studied by means of SEM and EPA methods, and the mechanism of the catalyst in diamond 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 accumulated in metal/graphite and metal/diamond boundaries. This composition segregation plays an important part in diamond crystal nucleation and growth process and benefits the carbon atoms migration in metal-catalyst as well.
出处
《中国有色金属学报》
EI
CAS
CSCD
1996年第1期136-139,共4页
The Chinese Journal of Nonferrous Metals
关键词
金刚石
触媒合金
合成
Ni-base catalyst
diamond synthesis
composition gradient
