Metallurgical and Materials Transactions B

, Volume 28, Issue 6, pp 1151–1155 | Cite as

Thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys

  • Shigeru Ueda
  • Kazuki Morita
  • Nobuo Sano


The thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys has been investigated at 1723 K by equilibrating the alloys in a controlled phosphorus partial pressure. The activity coefficient of phosphorus in each alloy shows a maximum value at a certain composition due to a strong interaction between silicon and iron and between silicon and manganese. Interaction coefficients between phosphorus and iron in molten silicon were found to be ε P Fe =7.43 and ρ P Fe =−16.4 (0≦X Fe≦0.65), and those between phosphorus and manganese were ε P Mn =12.0 and ρ P Mn =−22.2 (0≦X Mn≦0.5). Further discussion has revealed that the Si-Fe-P and Si-Mn-P systems approximately conform to a regular solution within the composition ranges investigated in the present work.


Material Transaction Phosphorus Content Ferrosilicon Regular Solution Model Gibbs Energy Change 
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  1. 1.
    S.C. Shim, K. Morita, and N. Sano: Steel Res., 1994, vol. 65, pp. 523–27.Google Scholar
  2. 2.
    K. Yamada and E. Kato: Tetsu-to-Hagané, 1979, vol. 65, pp. 273–80.Google Scholar
  3. 3.
    K. Yanaba, Y. Hino, T. Narushima, and Y. Iguchi: Abstr. Jpn. Inst. Met., 1996, vol. 119, p. 386.Google Scholar
  4. 4.
    T. Miki, K. Morita, and N. Sano: Metall. Mater. Trans. B, 1996, vol. 27B, pp. 937–41.Google Scholar
  5. 5.
    S. Ban-ya, N. Maruyama, and S. Fujino: Tetsu-to-Hagané, 1982, vol. 68, pp. 77–84.Google Scholar
  6. 6.
    J.B. Bookey, F.D. Richardson, and A.J. Welch: J. Iron Steel Inst., 1952, vol. 171, pp. 404–12.Google Scholar
  7. 7.
    Y.E. Lee: Metall. Trans. B, 1986, vol. 17B, pp. 777–83.Google Scholar
  8. 8.
    Y. Iguchi, Y. Tozaki, M. Kakizaki, T. Fuwa, and S. Ban-ya: Tetsu-to-Hagané, 1981, vol. 67, pp. 925–32.Google Scholar
  9. 9.
    N. Ahmad and J.N. Pratt: Metall. Trans. A, 1978, vol. 9A, pp. 1857–63.Google Scholar
  10. 10.
    R. Gee and T. Rosenqvist: Scand. J. Metall., 1976, vol. 5, pp. 57–62.Google Scholar
  11. 11.
    A. Tanaka: Trans. JIM, 1979, vol. 20, pp. 516–22.Google Scholar
  12. 12.
    P.Y. Chevalier, E. Fischer, and A. Rivet: CALPHAD, 1995, vol. 19, pp. 57–68.CrossRefGoogle Scholar
  13. 13.
    D.J. Min and N. Sano: Metall. Trans. B, 1988, vol. 19B, pp. 433–39.Google Scholar
  14. 14.
    Y. Ochifuji, F. Tsukihashi, and N. Sano: Metall. Mater. Trans. B, 1995, vol. 26B, pp. 789–94.Google Scholar
  15. 15.
    T. Ogasawara, K. Mori, T. Tominaga, F. Tsukihashi, and N. Sano: Iron Steel Inst. Jpn. Int., 1996, vol. 36, pp. S30-S33.Google Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 1997

Authors and Affiliations

  • Shigeru Ueda
    • 1
  • Kazuki Morita
    • 1
  • Nobuo Sano
    • 1
  1. 1.the Department of MetallurgyThe University of TokyoTokyoJapan

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