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首页> 外文期刊>ISIJ international >High Temperature Thermal Diffusivity Measurement for FeO Scale by Electrical-Optical Hybrid Pulse-Heating Method
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High Temperature Thermal Diffusivity Measurement for FeO Scale by Electrical-Optical Hybrid Pulse-Heating Method

机译：光电混合脉冲加热法测量FeO氧化皮的高温热扩散率

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摘要

Thermal diffusivity of FeO scale formed on iron has been determined at high temperature using an electrical-optical hybrid pulse-heating method, which can avoid the compositional change of the sample even at elevated temperatures by executing the experiment rapidly. The sample was a 90 μm-thick FeO scale layer, which had been thermally grown on a 0.5 mm-thick iron coupon at 1 123 K in an Ar-H_2-H_2O gas mixture. In the experiment, a large current pulse was supplied to the iron coupon, and the FeO scale was indirectly heated up to about 932 K from room temperature within 0.5 s. The temperature was maintained at the experimental temperature and the laser flash method was conducted to measure the effective thermal diffusivity of the coupon. Thermal diffusivity of FeO scale at 932 K was calculated to be 5.27 × 10~(-7) m~2s~(-1) based on a multi-layered analysis for the effective thermal diffusivity on the three-layered structure (FeO/Fe/FeO). X-ray diffraction analysis for the post-experiment coupon confirmed that no compositional change had occurred during the experiment. The uncertainty of the measured value was discussed. The effect of boundary resistance on the measured value was also estimated in this study.
机译：已经使用电光混合脉冲加热方法在高温下确定了在铁上形成的FeO垢的热扩散率，该方法即使在高温下也可以通过快速执行实验来避免样品的成分变化。样品是90μm厚的FeO氧化皮层，该层已在0.5 mm厚的铁试样上在1123 K的Ar-H_2-H_2O混合气体中热生长。在实验中，向铁试样施加了大电流脉冲，并且FeO氧化皮在0.5 s内从室温间接加热到约932K。将温度保持在实验温度，并进行激光闪光法以测量试样的有效热扩散率。通过对三层结构的有效热扩散率（FeO / Fe的多层分析）进行多层分析，得出FeO鳞片在932 K下的热扩散系数为5.27×10〜（-7）m〜2s〜（-1） / FeO）。实验后试样的X射线衍射分析证实，实验期间未发生成分变化。讨论了测量值的不确定性。在这项研究中还估算了边界电阻对测量值的影响。

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  • 来源
    《ISIJ international》 |2018年第12期|2186-2190|共5页
  • 作者

    Yuanru YANG; Hiromichi WATANABE; Mitsutoshi UEDA; Miyuki HAYASHI; Masahiro SUSA; Rie ENDO;

  • 作者单位

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8552 Japan;

    Research Institute for Material and Chemical Measurement, National Institute of Advance Industry Science and Technology, Tsukuba, Ibaraki, 305-8586 Japan;

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8552 Japan;

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8552 Japan;

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8552 Japan;

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8552 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

    thermal diffusivity; FeO scale; electrical-optical hybrid pulse-heating method; laser flash method;

    机译：热扩散率FeO规模电光混合脉冲加热法激光闪光法;

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