合成自锐性金刚石用低成本触媒研究  

Research on low cost powder catalyst for synthesizing Self-sharpening diamond

作　　者：赵文东[1] 徐骏[1] 张少明[1] 赵新明[1] 朱学新[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088

出　　处：《金刚石与磨料磨具工程》2010年第4期7-12,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：本文利用气雾化方法制备了Fe100-Χ-Y1MnY1NiΧ,Fe100-Χ-Y2MnY2NiΧ,Fe100-Χ-Y3MnY3NiΧ(Y1<Y2<Y3)三种触媒,利用金相显微镜、扫描电镜和X射线衍射仪对粉末的性能进行了检测,分析表明:制备的粉末均为面心立方结构单相固溶体,点阵常数约为0.36nm,接近于金刚石的晶格常数。与石墨不同配比的合成实验表明:Mn含量为Y3时,合成的金刚石呈团粒状结构(CSD),石墨转化率达到70%以上;此种金刚石堆积密度、静压强度、冲击强度和形貌与元素六的PDA产品相当;制备的树脂砂轮磨削效率比普通金刚石磨料砂轮提高了80%,表面粗糙度Ra为0.34μm以下;与现在合成CSD磨料常用的Ni基触媒相比,该触媒成本较低,有较好的应用前景。Three kinds of powder catalyst including Fe 100-Χ-Y1 Mn Y1 Ni Χ,Fe 100-Χ-Y2 Mn Y2 Ni Χ,Fe 100-Χ-Y3 Mn Y3 Ni Χ（ Y 1Y 2Y 3 ）were produced using gas atomization method,their performances were tested by optical microscope,scanning electron microscopy and X-ray diffraction. The analyzing results show that the prepared catalysts are face-centered cubic structured mono-phase solid solution alloys,and the lattice constant is about 0.36 nm,which is close to that of the diamond. From synthesizing experiments with graphite powder in different proportions,crumb structure diamond （CSD） was obtained when Mn content of the catalyst was Y 3,the graphite conversion rate reached above 70 %; The performances of CSD,such as packing density,static strength,impact strength and morphology are equivalent to PDA of Element Six Corporation. In comparison with ordinary diamond grinding wheels,the grinding efficiency of resin grinding wheel prepared using CSD is improved by 80%,the workpiece surface roughness was below 0.34 μm. Compared with the Ni-based catalyst which is commonly used in synthesizing CSD,the Fe 100-Χ-Y Mn YNi Χ catalyst costs cheaper and has a good application prospect.

关 键 词：触媒 自锐性金刚石 FeMn基 低成本 

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