新型多组元超细铁基触媒在自锐金刚石合成中的应用  

Application of new superfine multi-component iron-based catalyst powder in self-sharpening diamond synthesis

作　　者：谭素玲 孙双双 乔翠娅 孙继平 李鹏旭 TAN Suling;SUN Shuangshuang;QIAO Cuiya;SUN Jiping;LI Pengxu(Henan Hold Diamond Technology Co., Ltd., Shangqiu 476200, Henan, China;State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;Ya Hao Material Technology Co., Ltd., Qinhuangdao 066206, Hebei, China)

机构地区：[1]河南厚德钻石科技有限公司,河南商丘476200 [2]吉林大学超硬材料国家重点实验室,长春130012 [3]秦皇岛市雅豪新材料科技有限公司,河北秦皇岛066206

出　　处：《金刚石与磨料磨具工程》2019年第1期9-17,共9页Diamond & Abrasives Engineering

基　　金：河南省重大科技专项(181100210500)

摘　　要：采用水–气联合雾化工艺生产多组元铁基细粒度金刚石触媒,通过控制触媒氧化物杂质种类及含量来改善金刚石合成时其生长界面的金属包膜质量,进而提高金刚石的合成质量。通过调控合成工艺,为金刚石生长创造稳定的热力学及动力学条件,促进金刚石二维层状生长,提高金刚石的阶梯状微破碎自锐能力。采用光学显微镜、扫描电镜(SEM)及扫描能谱分析(EDS)等手段分析用常规FeNi30触媒与新型触媒合成的金刚石的质量及结晶生长特点。结果表明:采用新型触媒合成的金刚石自锐性提高,用其制备的水泥锯片、绳锯的锋利度较以往同类型金刚石工具的锋利度提高15%以上,工具的连续工作平稳性也显著提高。A superfine multi-component iron-based catalyst powder with less oxide impurities was prepared by water-gas combined atomization technique.By controlling the type and content of the oxide impurities in the catalyst,the stability of the metallic film at diamond growth interface could be well controlled,improving the quality and self-sharpness of diamond.Furthermore,two-dimensional layered growth of diamond was improved under the stable thermodynamic and kinetic conditions by adjusting the synthesis process,improving the self-sharpening ability of step-like micro-fragmentation of diamond.The synthetic quality and crystal growth characteristics of diamond produced by conventional FeNi30 and newly designed catalyst were analyzed and compared by means of optical microscopy,scanning electron microscopy(SEM)and energy dispersive spectroscope(EDS).The results show that the self-sharpness of the diamond produced by new catalyst is well improved,the sharpness of the cement diamond saw blade and wire saw prepared by the as-produced diamond is more than 15%higher than before,and the continuous working stability of the tools is remarkably improved.

关 键 词：人造金刚石 金属触媒 水–气联合雾化 金属包膜 自锐性金刚石 

分 类 号：TQ164[化学工程—高温制品工业]