【摘要】 文章利用气雾化方法制备了Fe100-Χ-YMnYNiΧ(Χ﹤Y,Y=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;制备的树脂砂轮耐磨性比普通金刚石磨料砂轮提高了80%,加工光洁度Ra达到0.34μm以下;与当前合成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。更多还原

【Abstract】 In this article,three types of powder catalysts,Fe100-Χ-YMnYNiΧ(Χ ﹤ Y,Y=Y1,Y2,Y3),have been prepared through gas atomization method.The performance of the powders has been tested by metalloscope,scanning electron microscopy and X ray diffracmeter.Result shows that all the powders are single phase solid solutions with facecentred cubic structure and their lattice constant is about 0.36 nm which is similar to that of diamond.Result of synthesis experiments with different graphite ratio shows that when the Mn content is Y3,the diamond synthetized presents a crumb structure(CSD)and the graphite transform ratio is over 70%.The stacking density,static pressure strength,impact strength and morphology of this type of diamond is similar to those of the PDA product by Element Six.Abrasive resistance of the resin grinding wheel made of this type of diamond has been improved by 80% compared to the common diamond grinding wheel,and the machining smoothness Ra is below 0.34μm.Compared to the frequently-used Nibased catalyst for synthesis of CSD grinding materials,this type of catalyst is less expensive with a better application prospect.更多还原