摘要
研究了在不同保温时间下MnO2对金刚石单晶的表面刻蚀,通过扫描电子显微镜和拉曼光谱对刻蚀后金刚石单晶不同晶面的表面形貌和刻蚀机理的进行了表征与分析,并对腐蚀过程中金刚石表现出来的各向异性进行了探讨。结果表明:当金刚石和MnO2质量比为1:5时,金刚石单晶的刻蚀程度随着保温时间的延长而增大;在相同保温时间下,{111}晶面比{100}晶面刻蚀严重;金刚石表面腐蚀后的形貌与对应晶面的碳原子排列有关,{100}面倾向于形成四边形的刻蚀坑,而{111}面则会形成轮廓为三角形的腐蚀坑,且金刚石单颗粒的抗压强度随刻蚀时间的延长而下降;刻蚀机理为MnO2与金刚石表面C原子发生反应,导致金刚石表面发生刻蚀。
The surface etching of diamond single crystal by MnO2 at different holding time was studied in this paper.The surface morphology and etching mechanism of the etched diamond single crystal were characterized and analyzed by scanning electron microscope and Raman spectrum.In addition,the anisotropy etching of diamond was discussed.The results show that,when the mass ratio of diamond to MnO 2 is 1:5,the etching degree of diamond single crystal increases with the prolongation of holding time,and the etching of{111}face is more serious than that of{100}face at the same holding time.The morphology of the etched diamond surface is related to the arrangement of carbon atoms on the corresponding crystal faces,so the etching pits of the{111}face are approximate triangular,while the etching pits of the{100}face are more quadrilateral.Furthermore,the compressive strength of the etched diamond single crystal decreases with the prolongation of etching time.The etching mechanism of diamond single crystal by MnO 2 is demonstrated that MnO 2 reacts with C atoms on the diamond surface to make the diamond surface etched.
作者
窦志强
肖长江
任付豪
梅鹏欣
陈诗
DOU Zhi-qiang;XIAO Chang-jiang;REN Fu-hao;MEI Peng-xin;CHEN Shi(School of Material Science and Engineering,Henan University of Technology,Zhengzhou 450001,China)
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2019年第5期344-349,共6页
Powder Metallurgy Technology
基金
郑州市科技局自然科学资助项目(20150246)
关键词
金刚石单晶
二氧化锰
保温时间
刻蚀
diamond single crystal
manganese oxide
holding time
etching
