Effects of carbonyl nickel powders on {100}-oriented single diamond under high pressure and high temperature

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• 作者：Yong Li ; ^{likaiyong6@163.com} ; Xiaopeng Jia ; Meihua Hu ; Bingmin Yan ; Zhenxiang Zhou ; Chao Fang ; Zhuangfei Zhang ; Hongan Ma
• 关键词：High pressure and high temperature ; Diamond ; Nitrogen concentration ; Morphology
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：34
• 期：Complete
• 页码：27-31
• 全文大小：655 K

文摘

In this paper, perfect {100}-oriented single diamonds with higher nitrogen concentration are successfully synthesized at a pressure of 5.5 GPa and temperature ranging from 1285 to 1294 ¡ãC by the adjustment of catalyst (Fe₆₄Ni₃₆) components. The content of carbonyl nickel powders has significant effect on the nitrogen concentration and the growth rate of the diamond crystals. Fourier transform infrared (FTIR) measurements reveal that the value of nitrogen concentration for the synthesized diamond is up to approximately 1020 ppm. Furthermore, basing on the diamond surface configuration, the structure of growth steps arranged layer by layer on {111} face is noticed using scanning electron microscopy (SEM), whereas the occurrence is not observed on {100} face.