...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Surface Tension of Liquid Iron as Functions of Oxygen Activity and Temperature
【24h】

Surface Tension of Liquid Iron as Functions of Oxygen Activity and Temperature

机译：液态铁的表面张力与氧活度和温度的关系

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Surface tension of liquid iron is an important property for process simulations evaluating Marangoni flow in the melt. In this study, we succeeded to measure accurate surface tension of liquid iron under various oxygen activities and temperatures with overcoming experimental difficulties through the following attempts: (1) To prevent chemical contamination of sample, an oscillating droplet method using an electromagnetic levitator was employed. Surface oscillation frequencies were determined with taking into account sample rotation. (2) To control the oxygen activity of liquid iron, a gas-liquid equilibrium method using CO/CO_2 containing gas mixtures was employed. This method enables precise control of oxygen activity with keeping carbon activity low, and therefore, oxygen activity dependence of surface tension was clarified without carbon effect. (3) To measure the surface tension for higher oxygen activities up to the Fe/FeO equilibrium, high-purity iron (99.9972 mass%) was used. Otherwise, minor reactive impurities in the melt such as aluminum are oxidized, which affects the surface tension measurement. Based on the experimental data, the surface tension of liquid iron was expressed as functions of oxygen activity and temperature using the Szyszkowski model. In addition, thermodynamic properties on the oxygen adsorption reaction and structure of the adsorbed oxygen layer on the melt surface were also discussed.
机译：液态铁的表面张力是评估熔体中Marangoni流动的过程模拟的重要属性。在这项研究中，我们通过以下尝试成功克服各种困难，成功地测量了在各种氧气活度和温度下液态铁的表面张力：（1）为防止样品受到化学污染，采用了一种使用电磁悬浮器的振荡液滴法。在考虑样品旋转的情况下确定表面振荡频率。 （2）为了控制液态铁的氧活性，采用了使用含CO / CO 2的气体混合物的气-液平衡方法。该方法能够在保持低碳活性的情况下精确地控制氧活性，因此，澄清了表面张力的氧活性依赖性，而没有碳作用。 （3）为了测量直至Fe / FeO平衡为止的更高的氧活性的表面张力，使用了高纯度铁（99.9972质量％）。否则，熔体中的少量反应性杂质（如铝）会被氧化，从而影响表面张力的测量。根据实验数据，使用Szyszkowski模型将铁水的表面张力表示为氧气活度和温度的函数。此外，还讨论了对氧吸附反应的热力学性质以及熔体表面吸附的氧层的结构。

著录项

  • 来源
    《ISIJ international》 |2011年第10期|p.1580-1586|共7页
  • 作者

    Keisuke MOROHOSHI; Masahito UCHIKOSHI; Minoru ISSHIKI; Hiroyuki FUKUYAMA;

  • 作者单位

    Institute of Multidisciplinary Research for Advanced Material (IMRAM), Tohoku University, Sendai 980-8577 Japan,Japan Society for the Promotion of Science;

    Institute of Multidisciplinary Research for Advanced Material (IMRAM), Tohoku University, Sendai 980-8577 Japan;

    Institute of Multidisciplinary Research for Advanced Material (IMRAM), Tohoku University, Sendai 980-8577 Japan;

    Institute of Multidisciplinary Research for Advanced Material (IMRAM), Tohoku University, Sendai 980-8577 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    surface tension; liquid iron; oxygen activity; oscillating droplet method; oxygen adsorption; electromagnetic levitation;

    机译：表面张力;液态铁氧气活性振荡滴法氧吸附电磁悬浮;

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