首页> 外文会议>Diffusion in solids and liquids VI >Effects of Mechanical Activation during the Synthesis of Tungsten Carbide Powders by Carbothermic Reduction of Tungsten Oxide
【24h】

Effects of Mechanical Activation during the Synthesis of Tungsten Carbide Powders by Carbothermic Reduction of Tungsten Oxide

机译:碳化钨热还原法合成碳化钨粉过程中的机械活化作用

获取原文
获取原文并翻译 | 示例

摘要

In this work, the effects of mechanical milling on the extent of reduction were investigated to give an overview of potential improvements in the preparation of WC. A mixture of graphite and tungsten oxide (WO3) was mechanically milled together for 10 h. The as-milled powder and un-milled powder were investigated by thermal analysis, isothermal treatment, and X-ray diffraction to determine the effect of milling on the carbothermal reduction of WO-3 to tungsten carbide (WC). The as-milled powder underwent a rapid reduction reaction at about 150℃ lower than the un-milled powder. The reduction sequence to WC was illustrated to differ for the two powders. The milled powder showed complete reduction to WC in 1 h at 1215℃ whereas the un-milled powder was incompletely reduced. Finally, WC powder was readily achieved by carbothermic reduction of mechanical activated WO-3 and graphite, leaving its grains nano-sized.
机译:在这项工作中,研究了机械研磨对还原程度的影响,以概述WC制备中潜在的改进。将石墨和氧化钨(WO3)的混合物机械研磨10小时。通过热分析,等温处理和X射线衍射研究了研磨后的粉末和未研磨后的粉末,以确定研磨对WO-3碳热还原为碳化钨(WC)的影响。研磨后的粉末在比未研磨的粉末低约150℃的温度下发生快速还原反应。说明两种粉末对WC的还原顺序不同。研磨后的粉末在1215℃1小时内显示出完全还原为WC,而未研磨的粉末未完全还原。最后,通过对机械活化的WO-3和石墨进行碳热还原,可以很容易地获得WC粉末,而其晶粒为纳米级。

著录项

  • 来源
    《Diffusion in solids and liquids VI》|2010年|p.248-252|共5页
  • 会议地点 Paris(FR);Paris(FR)
  • 作者

    J. Ma; S.G. Zhu; H. Ding; W.S. Gu;

  • 作者单位

    School of Mechanical Engineering, Donghua University, Shanghai, 201620, P.R. China;

    School of Mechanical Engineering, Donghua University, Shanghai, 201620, P.R. China,Engineering Research Center of Advanced Textile Machinery, Ministry of Education, Shanghai,201620, P. R. China;

    School of Mechanical Engineering, Donghua University, Shanghai, 201620, P.R. China;

    School of Mechanical Engineering, Donghua University, Shanghai, 201620, P.R. China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料一般性问题;
  • 关键词

    tungsten carbide; mechanical alloying; ball milling; solid state synthesis;

    机译:碳化钨机械合金化;球磨;固态合成;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号