稀土在粉末触媒合成金刚石中的作用研究  

Study on the role of rare earth in synthesizing diamond with powder catalyst

作　　者：赵文东[1,2] 徐骏[1,2] 郭宏[1,2] 朱学新[1,2] 李成栋[1,2] 宋月清[1] 

机构地区：[1]北京有色金属研究总院,北京100088 [2]国家金属基复合材料工程技术中心,北京100088

出　　处：《金刚石与磨料磨具工程》2009年第6期37-42,共6页Diamond & Abrasives Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA033901)

摘　　要：本文利用稀土作为添加元素制备了FeNi30粉末触媒并对其性能进行了研究。粉末成分测试发现:添加稀土后触媒粉末氧含量由230×10-6降低为120×10-6,根据稀土元素的性质对稀土作为脱氧、脱硫剂的作用机制进行了分析;选择不含稀土、石墨柱中添加稀土和触媒中合金化添加稀土三种情况进行了金刚石合成实验。通过实验数据的对比,得出稀土元素的添加有利于提高金刚石的混合单产、粗颗粒比例、静压强度和冲击韧性值以及降低磁化率,添加稀土元素后金刚石颜色由浅黄色变为了绿色,并对石墨柱热处理工艺进行了研究。In this research, rare earth elements were used as adding elements to produce FeNi30 powder catalyst. The composition of thus prepared powder was tested. It was found that, after adding rare earth elements, the oxygen content in catalyst powder decreased from 230 × 10-6 to 120 ×10-6. The deoxidizing and desulfurizing mechanism of the rare earth was analyzed. Diamond synthesizing experiments were carried out separately in three kinds of condition including non-rare earth, adding rare earth into graphite powder and adding rare earth in the form of alloy with catalyst into synthesizing column. By the comparison of experimental data, the authors have got the conclusion that, adding rare earth is beneficial to improve the diamond mixed yield, the proportion of coarse particles, static strength as well as the impact toughness of diamond, and to decrease magnetic susceptibility of diamond. The color of the obtained diamond turns from pale yellow to green tendency after adding rare earth elements. The authors also studied the function of vacuum heat treatment for graphite column.

关 键 词：稀土 粉末触媒 金刚石合成 

分 类 号：TF123[冶金工程—粉末冶金] TQ164[冶金工程—冶金物理化学]