Interfacial tensions between CaO-SiO2-Al2O3 slag and Fe-O-S, Fe-Si, Fe-Al, Fe-C, Fe-Cr or Fe-Ni alloys

Haiping Sun, Naoya Yoneda, Kunihiko Nakashima, Katsumi Mori

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    The interfacial tensions of 35mass%CaO-35mass%SiO2-30mass%Al2O3 slag with Fe-O-S, Fe-Si, Fe-Al, Fe-C, Fe-Cr or Fe-Ni alloys were investigated at 1580°C by the sessile drop method. The interfacial tension for Fe-O-S system decreased with increasing oxygen and/or sulfur contents and their values (σ) with oxygen and sulfur activities (a) were found to follow the relation, σ0-=0.324ln(1 + 116ao + 8.5as) ([S] < 1mass%) In evaluating the effect of each alloying element on the interfacial tension, the difference in the oxygen content in each alloy was taken in the consideration. The interfacial tension was increased with increasing aluminum and silicon contents, slightly decreased with increasing carbon or nickel contents, and markedly decreased with increasing sulfur and chromium contents in the melt.

    Original languageEnglish
    Pages (from-to)1-6
    Number of pages6
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Issue number1
    Publication statusPublished - 1997

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry


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