Fe基合金/石墨系柱状金刚石的高温高压合成与表征  

Synthesis of Column-Shape Diamonds from Fe-Based Alloy and Graphite System at High Pressure and High Temperature

作　　者：刘万强[1] 马洪安[2] 胡美华[2] 贾晓鹏[2] 

机构地区：[1]长春理工大学材料科学与工程学院,长春130022 [2]吉林大学,超硬材料国家重点实验室,长春130012

出　　处：《硅酸盐学报》2011年第8期1357-1360,共4页Journal of The Chinese Ceramic Society

摘　　要：用国产SPD 6×1200型六面顶压机,在10%Fe/90%Fe70Ni30粉末触媒和石墨(Fe–C)体系中,在压力为5.0～5.5 GPa、温度为1 550～1 600 K下合成出柱状金刚石晶体。研究了晶体的形态和生长习性。结果表明:合成的柱状金刚石晶体的颜色呈现绿色,晶体的长度为0.6～0.8 mm,长径比约为2.0～2.5。晶体有两种完整晶形,分别沿着[100]和[111]方向生长。晶体的红外吸收光谱分析表明,柱状金刚石晶体的含氮量(1500×106)高于正常形状晶体的。The column-shape diamond crystals were synthesized with a powder alloy catalyst of 10%（in mass）Fe/90%Fe70Ni30 and a graphite powder by a cubic anvil apparatus（Model SPD–6 × 1200） at 5.0–5.5 GPa and 1 550–1 600 K.The morphology and growth behavior of diamond crystal were investigated.The results show that the synthetic diamond crystals have a column-shape with light green color.The length range of the crystals was 0.6–0.8 mm with the length to diameter ratios of 2.0–2.5.The column-shape crystals had two main kinds of complete crystal shapes,namely,one elongated along the direction and another along the direction.It was indicated that the nitrogen content（1 500 × 10^6） of the synthetic diamond crystal was greater than that of the normal diamond crystal.

关 键 词：柱状金刚石 高温高压 触媒 石墨 

分 类 号：TQ164[化学工程—高温制品工业]