CVM Calculation of the Solid-State Equilibria in the Fe-Co Phase Diagram

  • C. Colinet
  • A. Antoni-Zdziobek


Solid -state phase equilibria in the Fe-Co system are investigated using the Cluster Variation Method (CVM) in the irregular tetrahedron approximation in the bcc lattice and in the regular tetrahedron approximation in the fcc lattice. Calculations are performed in the quaternary Fe+ Fe− Co+ Co− by considering both chemical and magnetic interactions. The A2/B2 order/disorder transition and the α/γ transition agree well with the experimental data in the literature. The composition dependence of the Curie temperatures for bcc and fcc alloys as predicted here are also presented.


Curie Temperature Magnetic Interaction Cluster Variation Method FeCo Alloy State Phase Equilibrium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    T.Nishizawa and K. Ishida, Co-Fe, in: Phase Diagrams of Binary Iron Alloys, A.S.M. Int., USA (1993).Google Scholar
  2. 2.
    H. Ackermann, G. Inden, and R. Kikuchi, Tetrahedron approximation of the cluster variation method for bcc alloys, Acta Metall, 37:1 (1989).CrossRefGoogle Scholar
  3. 3.
    R. Kikuchi, D. De Fontaine, M. Murakami, and T. Nakamura, Ternary phase diagram calculations - II Examples of clustering and ordering systems, Acta Metall, 25:207 (1977).CrossRefGoogle Scholar
  4. 4.
    C. Colinet, G. Inden, and R. Kikuchi, CVM calculation of the phase diagram of bccFe-Co-Al, Acta Metall Mater., 41:1109 (1993).CrossRefGoogle Scholar
  5. 5.
    A.T. Dinsdale, SGTE data for pure elements, Calphad, 15, 4:317, (1991).CrossRefGoogle Scholar
  6. 6.
    G. Inden an d W.O. Meyer, Approximate determination of the Curie temperature s of bcc Fe-Co alloys, Z Metal., 66:725 (1975).Google Scholar
  7. 7.
    P.J. Lawrence and P.L. Rossiter, Chemical and magnetic interactions in fcc Fe-Ni alloys using the cluster variation method, J. Phys. F: Met. Phys., 16:543 (1986).ADSCrossRefGoogle Scholar
  8. 8.
    A.S. Normanton, P.E. Bloomfíeld, F.R. Sale, and B.B. Argent, A calorimetric study of iron-cobalt alloys, Met. Sci, 9:510 (1975).CrossRefGoogle Scholar
  9. 9.
    H. Stuart and N. Ridley, Lattice parameters and Curie-point anomalies of iron-cobalt alloys, Brit. J. Appl. Phys., 2:485 (1969).Google Scholar
  10. 10.
    A.F. Guillermet, Critical evaluation of the thermodynamic properties of the iron-cobalt system, High Temp.- High Press., 19:477 (1987).Google Scholar
  11. 11.
    H. Masumoto, On a new transformation of cobalt and the equilibrium diagrams of nickel-cobalt and ironcobalt, Tohoku Imperial University Science Report, 1st ser., 15:450 (1926).Google Scholar
  12. 12.
    Y. Nakamura, M. Shiga, and S. Santa, Invar behavior of face-centered cubic FeCo alloys precipitated from copper, J. Phys. Soc. Jpn., 26:210 (1969).ADSCrossRefGoogle Scholar
  13. 13.
    W.C. Ellis and E.S. Greiner, Equilibrium relations in the solid state of the iron-cobalt system, Trans. A.S.M., 29:415 (1941).Google Scholar
  14. 14.
    J.H. Andrews and C.G. Nicholson, The iron-cobalt system, First Report of the Alloy Steels Research Committee, (1936).Google Scholar
  15. 15.
    H. Asano, Y. Bando, N. Nakanishi, and S. Kachi, Order-disorder transformation of Fe-Co alloys in fine particles, Trans. Jpn. Inst. Met, 8:180 (1967).Google Scholar
  16. 16.
    J.A. Oyedele and M.F. Collins, Composition dependence of the order-disorder transition in iron-cobalt alloys, Phys. Rev. B, 16:3208 (1977).ADSCrossRefGoogle Scholar
  17. 17.
    W.A. Fisher, K. Lorenz, H. Fabritius, and D. Schlegel, Examination of the alpha-gamma transformation in very pure binary alloys of iron with molybdenum, vanadium, tungsten, niobium, tantalum, zirconium and cobalt, Arch. Eisenhüttenwes., 41:489 (1970).Google Scholar

Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • C. Colinet
    • 1
  • A. Antoni-Zdziobek
    • 1
  1. 1.Laboratoire de Thermodynamique et Physico-Chimie MétallurgiquesUMR, CNRS 5614/INPG/UJFSaint Martin d’Hères CedexFrance

Personalised recommendations