Thermodynamics of the liquid Co-Cu system and calculation of phase diagram

  • Jaroslav Kubišta
  • Jan Vřešt’ál
Basic And Applied Research


Knudsen-cell mass spectrometric measurements have been carried out in the liquid phase of the Co-Cu system in the concentration range 25.0 to 85.9 at. % Cu in the temperature range 1347 to 1587 °C. The molar excess Gibbs energy, enthalpy and entropy of mixing, as well as the thermodynamic activities of components in the liquid Co-Cu system were determined using the composition and temperature dependence of the ratio of intensities of 59Co and 63Cu ions. The results show that a subregular solution model would fit measured data well (2-parameter thermodynamically adapted power (TAP) series: C n H in J·mol−1; C 1 H =35,961, C 2 H =−5573.2; C n S in J·mol−1·K−1; C 1 S =5.54, C 2 S =−3.35). A special experiment verified solid-liquid phase equilibrium at 1327 °C and the phase diagram was calculated.


Excess Gibbs Energy Phase Diagram Calculation Molar Excess Gibbs Energy Thick Full Line Thin Full Line 
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  1. 1937Has:.
    U. Hashimoto; J. Jpn. Inst. Met., 1937, vol. 1, p. 19.Google Scholar
  2. 1948Red:.
    O. Redlich and A.T. Kister: Ind. Eng. Chem., 1948, vol. 40, p. 345.CrossRefGoogle Scholar
  3. 1969Nec:.
    A. Neckel and S. Wagner: Ber. Bunsenges. Phys. Chem., 1969, vol. 73, p. 210.Google Scholar
  4. 1978Hil:.
    M. Hillert and M. Jarl; CALPHAD, 1978, vol. 2, p. 277.CrossRefGoogle Scholar
  5. 1980Has:.
    M. Hasebe and T. Nishizawa: CALPHAD, 1980, vol. 2, pp. 83–100.CrossRefGoogle Scholar
  6. 1981Tim:.
    L. Timberg, J.M. Toguri, and T. Azakami; Metall. Trans. B, 1981, vol. 12B, pp. 275–79.CrossRefADSGoogle Scholar
  7. 1982Tas:.
    P. Taskinen: Z. Metallkd. 1982, vol. 73, pp. 445–50.Google Scholar
  8. 1983Nie:.
    A.K. Niesen, F.R. de Boer, R. Boom, P.F. de Chatel, W.C.M. Mattens, and A.R. Miedema: CALPHAD, 1983, vol. 7, p. 401.CrossRefGoogle Scholar
  9. 1985Tom:.
    J. Tomiska: CALPHAD, 1985, vol. 9, p. 15.CrossRefGoogle Scholar
  10. 1991Din:.
    A.T. Dinsdale: CALPHAD, 1991, vol. 15, pp. 317–425.CrossRefGoogle Scholar
  11. 1991Tom:.
    J. Tomiska: Z. Metallkd., 1991, vol. 81, p. 912.Google Scholar
  12. 1993Lee:.
    Chan-Gyu Lee, Y. Iijima, and K. Hirano: Defect Diffusion Forum, 1993, vol. 95–98, pp. 723–28.CrossRefGoogle Scholar
  13. 1993Vre:.
    J. Vřešt’ál and J. Tomiska: J. Non-Cryst. Solids, 1993, vol. 156–158, pp. 429–32.Google Scholar
  14. 1993Vr1:.
    J. Vřešt’ál and J. Tomiska: Monatsh. Chem., 1993, vol. 124, pp. 1099–1106.CrossRefGoogle Scholar
  15. 1995Tur:.
    M.A. Turchanin: Metally, 1995, vol. 5, pp. 12–19.Google Scholar
  16. 1997Sun:.
    B. Sundman: Thermo-Calc, version L, Royal Institute of Technology, Stockholm, 1997.Google Scholar

Copyright information

© ASM International 2000

Authors and Affiliations

  • Jaroslav Kubišta
    • 1
  • Jan Vřešt’ál
    • 1
  1. 1.Institute of Theoretical and Physical Chemistry, Fac. Sci.Masaryk University BrnoBrnoCzech Republic

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