Metallurgical and Materials Transactions A

, Volume 37, Issue 11, pp 3171–3181 | Cite as

Thermodynamic properties of B2-AlFeNi Alloys. Part I: Investigation by knudsen effusion mass spectrometry

  • L. Bencze
  • T. Markus
  • D. Kath
  • S. Dash
  • D. D. Raj
  • W. A. Oates
  • W. Löser
  • K. Hilpert
Article

Abstract

The vaporization of Al-Fe-Ni alloys has been investigated in the temperature range 1180 to 1508 K by Knudsen effusion mass spectrometry (KEMS). Fourteen different compositions were examined in the B2 region: 10 compositions at two fixed Al concentrations,x Al=0.45 andx Al=0.50 plus four extra compositions at constantx Ni/x Fe=1. For the first time, reliable partial pressures and thermodynamic activities of Al, Fe, and Ni have been evaluated from the measured ion intensities for both the alloy and the pure element. Gibbs energies, partial molar enthalpies, and entropies of formation for all the components have also been obtained. The relative partial molar enthalpies and entropies were found to be nearly temperature independent over the wide temperature ranges investigated. At 1400 K, the Gibbs energy of formation of Al0.50Fe0.25Ni0.25 and Al0.45Fe0.275Ni0.275, with Al(liq), Fe(fcc), and completely paramagnetic Ni(fcc,cpm) as reference states, are −37.9±0.42 kJ/mol and −38.1±0.42 kJ/mol, respectively. At the same temperature, the enthalpies of formation of Al0.50Fe0.25Ni0.25 and Al0.45Fe0.275Ni0.275, with the same reference states, are −51.5±1.7 kJ/mol and −49.2±1.7 kJ/mol, respectively.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    L. Bencze, D.D. Raj, D. Kath, W.A. Oates, J. Herrmann, L. Singheiser, and K. Hilpert:Metall. Mater. Trans. A, 2003, vol. 34A, pp. 2409–19.Google Scholar
  2. 2.
    D. Raj, L. Bencze, D. Kath, W.A. Oates, J. Herrmann, L. Singheiser, and K. Hilpert:Intermetallics, 2003, vol. 11, pp. 1119–24.CrossRefGoogle Scholar
  3. 3.
    L. Bencze, D.D. Raj, D. Kath, W.A. Oates, L. Singheiser, and K. Hilpert:Metall. Mater. Trans. B, 2004, vol. 35B, pp. 867–76.Google Scholar
  4. 4.
    K. Hilpert, M. Albers, M. Eckert, and D. Kath:Structural Intermetallics, Proc. 2nd Int. Symp. on Structural Intermetallics, Warrendale, PA, 1997, M.V. Nathal, R. Dariola, C.T. Liu, P.L. Martin, D.B. Miracle, R. Wagner, and M. Yamaguchi, TMS, Warrendale, PA, 1997, pp. 63–71.Google Scholar
  5. 5.
    H.P. Scholz: Doctor’s Thesis, University of Göttingen, Göttingen, Germany, 2001.Google Scholar
  6. 6.
    L.M. Pike, I.M. Anderson, G.T. Liu, and Y.A. Chang:Acta Mater., 2002, vol. 50, pp. 3859–79.CrossRefGoogle Scholar
  7. 7.
    M. Kogachi and T. Tanahashi:Scripta Mater., 1996, vol. 34, pp. 243–48.CrossRefGoogle Scholar
  8. 8.
    X. Ren and K. Otsuka:Phil. Mag. A, 2000, vol. 80, p. 467.Google Scholar
  9. 9.
    J. Breuer, F. Sommer, and E.J. Mittemeijer:Z. Metallkd., 2003, vol. 94, pp. 954–61.Google Scholar
  10. 10.
    J. Breuer, F. Sommer, and E.J. Mittemeijer:Phil. Mag. A, 2002, vol. 82 (3), pp. 479–96.CrossRefGoogle Scholar
  11. 11.
    P. Villars, A. Price, and H. Okamoto:Handbook of Ternary Alloy Phase Diagrams, ASM INTERNATIONAL, Materials Park, OH, 1995, vol. 3.Google Scholar
  12. 12.
    A.A. Zubkov, L.P. Emel’yanko, and V.I. Ulyanov:Metally, 1993, vol. 3, pp. 39–42.Google Scholar
  13. 13.
    A. Grün: Dissertation, Universität Stuttgart, Stuttgart, 1996.Google Scholar
  14. 14.
    J. Breuer, A. Grün, F. Sommer, and E.J. Mittemeijer:Metall. Mater. Trans. B, 2001, vol. 32B, pp. 913–18.Google Scholar
  15. 15.
    H. Su, P. Nash, and Z. Liu:High Temperature Corrosion and Materials Chemistry IV, Electrochemical Society Proc., The Electrochemical Society Inc., Pennington, NJ, vol. 2003–16, pp. 489–502.Google Scholar
  16. 16.
    K. Hilpert and K. Ruthardt:Ber. Bunsenges. Phys. Chem., 1987, vol. 91, p. 724.Google Scholar
  17. 17.
    J.B. Mann:Recent Developments in Mass Spectrometry, Proc. Int. Conf. on Mass Spectrometry, Kyoto, Japan, 1970, K. Ogata and T. Hayakawa, eds., University of Tokyo Press, Tokyo, 1970, p. 814 and personal communication.Google Scholar
  18. 18.
    V.S. Yungman, V.A. Medvedev, I.V. Veits, and G.A. Bergman:IVTANTHERMO—A Thermodynamic Database and Software System for the Personal Computer, CRC Press and Begel House, Boca Raton, FL, 1993.Google Scholar
  19. 19.
    A. Neckel: inThermochemistry of Alloys, H. Brodowsky und H. Schaller, eds., Kluwer, Dordrecht, The Netherlands, 1989, p. 221.Google Scholar
  20. 20.
    L. Bencze, K. Hilpert, and W.A. Oates: Roland Eötvös University, unpublished research, 2003.Google Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • L. Bencze
    • 1
  • T. Markus
    • 2
  • D. Kath
    • 2
  • S. Dash
    • 3
  • D. D. Raj
    • 4
  • W. A. Oates
    • 5
  • W. Löser
    • 6
  • K. Hilpert
    • 7
  1. 1.Department of Physical ChemistryRoland Eotvos UniversityBudapestHungary
  2. 2.Research Center Jülich (KFA)Institute for Materials and Processes in Energy Systems (IWV-2)JülichGermany
  3. 3.Fuel Chemistry DivisionBhabha Atomic Research CenterTrombay, MumbaiIndia
  4. 4.Materials Chemistry DivisionIndira Gandhi Centre for Atomic Research (GCAAR), KalpakkamTamil NaduIndia
  5. 5.Institute of Materials ResearchUniversity of SalfordSalfordUnited Kingdom
  6. 6.IFW DresdenDresdenGermany
  7. 7.Research Center Jülich (KFA), Institute for Materials and Processes in Energy Systems (IWV-2), is ProfessorTechnical University DarmstadtDarmstadtGermany

Personalised recommendations