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Thermodynamics and Phase Diagrams

This article explores the thermodynamics of phase diagrams, including complete solubility, phase separation via exsolution, and eutectic behavior in ternary systems. Examples include the development of limited solid solubility, compound formation, and various exsolution topologies. The text investigates specific ternary systems such as Au-Cu, Au-Cd, Au-Na, Au-Ni, and Au-Co, highlighting their unique characteristics and deviations from ideality. Triangle representations and ternary eutectic behavior are also discussed.

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Thermodynamics and Phase Diagrams

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  1. Thermodynamics and Phase Diagrams Alexandra Navrotsky

  2. Phase Separation

  3. Other exsolution topologies

  4. Complete solubility in both high T and low T phases: vapor-liquid or liquid-solid equilibrium

  5. Complete solubility in liquid, none in solids: eutectic

  6. Eutectic, Solid Solution, Free Energies

  7. Development of limited solid solubility acd a eutectic from a solid solution

  8. Development of compound formation from a eutectic

  9. Au-Cu: ordered compounds at low T, complete solid solution at highT

  10. Au-Cd: stable compounds to the liquidus

  11. Au-Na: stable stoichiometric compounds

  12. Au-Ni: miscibility gap almost to the solidus

  13. Au-Co: different structures, no compounds, eutectic, positive deviations from ideality in melt also

  14. Ternary system: triangle representation

  15. Ternary exsolution topologies

  16. Ternary eutectic

  17. Ternary Eutectic

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