粉末触媒合成柱真空烧结工艺的研究  

Study of vacuum sintering technique of powder catalyst capsule

作　　者：徐燕军[1] 柳成渊[1] 陈哲[1] 刘一波[1] 尹翔[2] 赵万林[1] 

机构地区：[1]钢铁研究总院,北京100081 [2]安泰科技股份有限公司,北京100081

出　　处：《金刚石与磨料磨具工程》2008年第4期18-21,共4页Diamond & Abrasives Engineering

摘　　要：粉末触媒在雾化过程中容易氧化,水雾化粉末触媒氧含量一般在0.1%～0.4%,所以在合成金刚石前都必须对合成柱进行还原烧结处理,以降低其中的氧含量。本文通过对水雾化FeNi_(30)粉末触媒合成柱的真空烧结研究,发现还原过程为石墨直接还原和石墨气化反应共同作用;确定在烧结温度980℃时,保温8h可以基本还原其中的氧化物,保证合成出高品级金刚石。Powdery catalyst is easy to be oxidized during atomizing. The oxygen content is 0.1% - 0.4% in the alloyed powder prepared by water atomization. For this reason, the powder catalyst must be reduced for reducing the oxygen content before synthesis. In this paper , we find that the reduction process include the graphite direct reduction and gasification indirect reduction; when the sintering temperature is set 980 ℃ and kept for 8 hours, high quality diamond can be synthesized.

关 键 词：粉末触媒 金刚石 真空烧结 

分 类 号：TB43[一般工业技术] TG74[金属学及工艺—刀具与模具]