摘要
本文分别用N i70Mn25Co5合金粉末和含添加剂硫的N i70Mn25Co5合金粉末作触媒合成了金刚石单晶,通过对比,发现添加剂硫的引入使得金刚石内的包裹体含量增加,使晶体表面出现熔坑;利用X射线荧光光谱对晶体的杂质成分、相对含量进行了分析,发现杂质元素锰、硫的含量随着触媒中硫的添加量的增加呈增加趋势,由此推测在金刚石生长过程中生成了难熔的MnS,MnS以包裹体的形式进入金刚石中,在一定程度上破坏了金刚石的晶格排列,使得表面出现熔坑。
In this paper, single-crystal diamonds were synthesized using respectively Ni70Mn25Co5 alloy powder and sulfur-added Ni70Mn25Co5 alloy powder as catalyst. Optical pictures of the diamonds were compared. It is found that the introduction of additive sulfur made the inclusions content of diamonds increase. A lot of etch pits were observed on the surface of sulfur-doped diamonds. Using X-ray fluorescence spectrum, the composition and the relative content of impurities in diamond crystals were analyzed. It is found that the content of impurity elements,namely manganese and sulfur,showed a tendency to increase when the sulfur content in catalyst increases. So it is inferred that MnS, which is difficult to melt, had formed during the synthesis. MnS had entered into diamonds in the form of inclusions. This destroyed the lattice structure of diamond to a certain extent, and further led to the appearance of some etch pits on diamond surface.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2005年第4期14-16,19,共4页
Diamond & Abrasives Engineering
基金
国家自然科学基金项目(50172018)
河南理工大学引进人才基金项目。
关键词
硫
金刚石
包裹体
熔坑
杂质
sulfur
diamond
etch pits
inclusions
作者简介
周林，男，1979年生，吉林大学超硬材料国家重点实验室，在读硕士研究生，从事含硫金刚石的合成与研究。
