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Effects of Ti additive on HPHT diamond synthesis in Fe-Ni-C system

ISSN号：1006-852X
期刊名称：《金刚石与磨料磨具工程》
时间：0
分类：TQ164.8[化学工程—高温制品工业] TF821.02[冶金工程—有色金属冶金]
作者机构：[1]National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
相关基金：Supported by the National Natural Science Foundation of China （Grant Nos. 50572032 and 50731006）

作者： HAN Wei JIA XiaoPeng JIA HongSheng HU MeiHua HUANG HaiLiang LIU XiaoBing MA HongAn[1]

关键词：合成金刚石, 铁添加剂, 高温高压, C系统, 镍钛, 傅立叶变换红外光谱, 金刚石晶体, 扫描电子显微镜, Ti additive, HPHT, diamond synthesis, low nitrogen concentration

中文摘要：

有低氮集中的钻石晶体在一种瓷器类型在高压力和高温度(HPHT ) 与 Ti 添加剂从 Fe-Ni-C 系统被综合立方的高压力仪器(CHPA ) 。合成压力范围是 4.8 5.2 GPa，并且温度范围是 1420 1600 K。为钻石的最低合成压力首先掉落了然后随 Ti 添加剂的增加升起了。颜色，形状，表面形态学和综合钻石晶体的氮杂质集中用光显微镜学(OM ) 被描绘，扫描电子显微镜学(SEM ) 和微 Fourier 变换红外线(FTIR ) spectrometry。结果证明 Ti 添加剂在颜色，生长率，水晶形状，表面形态学和综合钻石晶体的氮杂质集中上有重要效果。没有 Ti，钻石晶体的颜色综合了添加剂是黄的，当时与 Ti，添加剂变得轻、将近无色。没有 Ti 添加剂的生长率与 Ti 添加剂比那高。成长得当的钻石晶体的水晶形状随 Ti 添加剂的增加变化。{ 111 } 水晶脸变得主导并且一些 { 311 } 水晶脸随 Ti 的增加出现添加剂。在没有 Ti 添加剂的钻石晶体的氮杂质的集中与 Ti 添加剂比那高。

英文摘要：

Diamond crystals with low nitrogen concentration were synthesized from the Fe-Ni-C system with Ti additive at high pressure and high temperature （HPHT） in a china-type cubic high pressure apparatus （CHPA）. The synthesis pressure range was 4.8-5.2 GPa, and the temperature range was 1420-1600 K. The lowest synthesis pressure for diamond fell first and then rose with the increase of Ti additive. The color, shape, surface morphology and nitrogen impurity concentration of the synthesized diamond crystals were characterized using optical microscopy （OM）, scanning electron microscopy （SEM） and micro Fourier transform infrared （FTIR） spectrometry. The results show that the Ti additive has significant effects on color, growth rate, crystal shape, surface morphology and nitrogen impurity con- centration of the synthesized diamond crystals. The color of diamond crystals synthesized without Ti additive is yellow, while that with Ti additive becomes light and nearly colorless. The growth rate without Ti additive is higher than that with Ti additive. The crystal shapes of as-grown diamond crystals vary with the increase of Ti additive. The {111} crystal faces become dominant and some {311} crystal faces appear with the increase of Ti additive. The concentration of nitrogen impurity in diamond crystals without Ti additive is higher than that with Ti additive.