Fe-C-S系金刚石单晶的高温高压合成  

Synthesis of diamond single crystals in Fe-C-S system by high temperature and high pressure

作　　者：周林[1] 孙普男[1] 马红安[2] 贾晓鹏[2] 

机构地区：[1]黑龙江大学物理科学与技术学院,哈尔滨150080 [2]吉林大学超硬材料国家重点实验室,长春130012

出　　处：《金刚石与磨料磨具工程》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

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.

关 键 词：硫添加剂 金刚石 高温高压法 

分 类 号：TQ164[化学工程—高温制品工业]