新型多组元超细铁基触媒在自锐金刚石合成中的应用
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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.
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.
引文
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[3] 屈曙光, 毛拥军, 钟祥, 等. Fe–Ni粉状触媒合成金刚石的成核研究 [J]. 矿冶工程, 2000, 20(2): 63–65.QU Shuguang, MAO Yongjun, ZHONG Xiang, et al. Effect of powder Fe-Ni catalyst alloy on synthetic diamond [J]. Mining and Metallurgical Engineering, 2000, 20(2): 63-65.
[4] 赵文东. 铁基粉末触媒合成金刚石作用机理的研究 [D]. 北京: 北京有色金属研究总院, 2010. ZHAO Wendong. Research on mechanism of synthesizing diamond by Fe-based powder catalyst [D]. Beijing: General Research Institute for Nonferrous Metals, 2010.
[5] 秦杰明, 贾晓鹏, 马红安, 等. 用铁基粉末触媒合成金刚石的研究 [J]. 金刚石与磨料磨具工程, 2004(6): 1–3.QIN Jieming, JIA Xiaopeng, MA Hongan, et al. Study on the synthesis of diamond using Fe-based powder catalyst [J]. Diamond & Abrasives Engineering, 2004(6): 1-3.
[6] 李和胜. Fe–Ni–C–B系高温高压合成含硼金刚石单晶的工艺与机理研究 [D]. 济南: 山东大学, 2009.LI Hesheng. Study on synthesis technology and mechanism of boron-doped diamond single crystal in Fe-Ni-C-B system at HPHT [D]. Jinan: Shandong University, 2009.
[7] 徐燕军, 刘一波, 麻洪秋, 等. 合成金刚石用水雾化触媒粉末Fe70Ni30性能的研究 [J]. 金刚石与磨料磨具工程, 2011, 31(4): 29–31.XU Yanjun, LIU Yibo, MA Hongqiu, et al. Study of properties of water atomized catalyst powder Fe70Ni30 used for synthesizing diamond [J]. Diamond & Abrasives Engineering, 2011, 31(4): 29-31.
[8] 赵文东, 徐骏, 张少明, 等. FeMn粉末触媒制备及金刚石合成条件的研究 [J]. 人工晶体学报, 2010, 39(4): 888–894.ZHAO Wendong, XU Jun, ZHANG Shaoming, et al. Study on preparation of FeMn-based powder catalyst and diamond′s synthesis conditions [J]. Journal of Synthetic Crystals, 2010, 39(4): 888-894.
[9] 李和胜, 亓永新, 李木森. 高温高压下Fe–Ni–C系中金刚石层状生长的机理探讨 [J]. 金刚石与磨料磨具工程, 2008(5): 7–11.LI Hesheng, QI Yongxin, LI Musen. Layer growth mechanism of diamond in Fe-Ni-C system at HP-HT [J]. Diamond & Abrasives Engineering, 2008(5): 7-11.
[10] 赵文东, 徐骏, 张少明, 等. 稀土对FeNi30粉末触媒合成金刚石的影响 [J]. 粉末冶金材料科学与工程, 2010, 15(2): 167–173.ZHAO Wendong, XU Jun, ZHANG Shaoming, et al. Effects of rare earths on synthesizing diamond with FeNi30 powder catalyst [J]. Materials Science and Engineering of Powder Metallurgy, 2010, 15(2): 167-173.