Journal of Phase Equilibria

, Volume 14, Issue 4, pp 465–472 | Cite as

Solid electrolyte cell studies of solid nickel-gallium alloys

  • J. N. Pratt
  • J. M. Bird
Section II: Basic and Applied Research


Reversible galvanic cells employing ZrO2-CaO solid electrolytes and either Pt/O2 (air) or Ni/NiO reference electrodes were used to measure thermodynamic properties of solid Ni-Ga alloys at temperatures between 873 and 1100 K. Activities, partial Gibbs energies, and integral Gibbs energies, entropies, and enthalpies have been obtained for the a (fcc) solid solution and for the intermediate phases—Ni3Ga, Ni5Ga3, Ni3Ga2, Ni13Ga9, NiGa, and Ni2Ga3. The system is characterized by negative deviations from ideality, exothermic enthalpies, and negative entropies of formation. An analysis of the latter in terms of configurational, electronic, vibrational, dilatational, and magnetic contributions is suggested.


Entropy Gibbs Energy Ni3Ga Partial Gibbs Energy Exothermic Enthalpy 
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Copyright information

© ASM International 1993

Authors and Affiliations

  • J. N. Pratt
    • 1
  • J. M. Bird
    • 1
  1. 1.School of Metallurgy and MaterialsUniversity of BirminghamEngland

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