摘要
在Fe-C体系中加入单质硫(S)作为添加剂,采用高温高压法合成金刚石单晶。研究表明:S在高温高压下与Fe发生了相互作用,影响了Fe的催化性能,进而对金刚石的自发成核产生抑制作用。S的添加能使纯Fe触媒合成六八面体晶体的温度区间变宽,从而提高合成六八面体的可控性;在显微镜下观察金刚石晶体形貌颜色为深黄,晶体完整,包裹体较少;在扫描电子显微镜下观察金刚石晶体的表面形貌,发现:六八面体的(111)晶面比较平坦,而(100)晶面很粗糙,整个(100)面上布满了"小山丘",在其中部一般都有一个较大的凹陷。
By adding sulfur as additive in Fe-C system,diamond single crystals was synthesized under high temperature and high pressure（HTHP） condition.It was indicated that the sulfur had reacted with iron under HTHP.This influenced the catalytic performance of iron,and then inhibited the spontaneous nucleation of diamond to a certain degree.The introduction of sulfur could widen the growth temperature range of cubo-octahedral diamond crystal,and increase its production controllability.Observation under optical microscope revealed that diamonds synthesized with Fe-C-S had dark yellow surface appearance,quite perfect shape and with little inclusions.SEM results showed that the plane（111）of cubo-octahedral diamond was smooth,while the plane（100）,covered with a lot of ＂small hillocks ＂ and usually having a larger concave in the middle,was quite rough.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2011年第2期1-3,16,共4页
Diamond & Abrasives Engineering
基金
黑龙江省教育厅科学技术研究项目(11551329)资助
关键词
硫添加剂
金刚石
高温高压法
sulfur additive
diamond
high temperature and high pressure method
