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Surface tension of liquid Fe-Cr-O alloys at 1823 K

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Abstract

The surface tension of liquid Fe-Cr-O alloys has been determined by using the sessile drop method at 1823 K. It was found that the surface tension of liquid Fe-Cr-O alloy markedly decreases with oxygen content at constant chromium content, and the surface tension at a given oxygen content remains almost constant, regardless of the chromium content. When the surface tension of liquid Fe-Cr-O alloys is plotted as a function of oxygen activity, with an increase in the chromium content, the surface tension shows a much steeper decrease with respect to oxygen activity. The surface tension of liquid Fe-Cr-O alloys at 1823 K is given as follows: σ=1842-279 ln (1+K O a O). Here, assuming a Langmuir-type adsorption isotherm, the adsorption coefficient of oxygen, K O(Fe-Cr), as a function of chromium content, was shown to be K O=140+4.2 × [wt pct Cr]+1.14 × [wt pct Cr]2.

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Author notes

  1. Joonho Lee (Postdoctoral Researcher, Assistant Professor)

    Present address: Department of Materials Engineering, University of Tokyo, Bunkyo, 113-8656, Tokyo, Japan

Authors and Affiliations

  1. Osaka University, 565-0817, Osaka, Japan

    Joonho Lee (Postdoctoral Researcher, Assistant Professor)

  2. Department of Materials Engineering, University of Tokyo, Bunkyo, 113-8656, Tokyo, Japan

    Koji Yamamoto (Graduate Student) & Kazuki Morita (Associate Professor)

Authors
  1. Joonho Lee
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  2. Koji Yamamoto
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  3. Kazuki Morita
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Lee, J., Yamamoto, K. & Morita, K. Surface tension of liquid Fe-Cr-O alloys at 1823 K. Metall Mater Trans B 36, 241–246 (2005). https://doi.org/10.1007/s11663-005-0025-0

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