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Thermodynamic modelling in the ZrO2–La2O3–Y2O3–Al2O3 system

  • O. Fabrichnaya , M. Zinkevich and F. Aldinger
Published/Copyright: May 23, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 98 Issue 9

Abstract

The thermodynamic database for the ZrO2 – La2O3 – Y2O3 – Al2O3 system has been derived using previous descriptions for the six binary systems and the ternary ZrO2 – La2O3 – Al2O3 system. The parameters of the Y2O3 – Al2O3 system were adjusted due to changes in the Y2O3 thermody-namic parameters. The thermodynamic parameters of the La2O3 – Y2O3 system were slightly changed to get consistency between calculations and new experimental results for the ZrO2 – La2O3 – Y2O3 ternary system. Diverse kinds of phase diagrams of the ZrO2 – La2O3 – Y2O3 and La2O3 – Y2O3 – Al2O3 ternary systems have been calculated. The present thermodynamic description of the quaternary system is consistent with available experimental results for lower-order systems. It was used to calculate isoplethal sections for compositions related to thermal barrier coating (TBC) and its interaction with thermally grown oxide Al2O3. The T0-lines have been calculated for diffusionless transformations between fluorite, tetragonal, monoclinic and pyrochlore phases in the ZrO2 – LaO1.5 system as well as driving forces for partitioning of non-equilibrium phase into equilibrium phase assemblages. These data could be applied for determination of desirable ranges of material composition for TBC.

Keywords: Thermodynamic modelling; Phase diagrams; Partially stabilised zirconia; Zirconates; Thermal barrier coatings
* Correspondence address, Dr. Olga Fabrichnaya, TU Bergakademie Freiberg Gustav-Zeuner-Str. 5, D-09599 Freiberg, Germany Tel.: +49 3731 39 356 Fax: +49 3731 39 3657 E-mail:

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Received: 2007-4-2
Accepted: 2007-7-2
Published Online: 2013-05-23
Published in Print: 2007-09-01

© 2007, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Computational Thermochemistry
  5. Gunnar Eriksson 65 years
  6. Basic
  7. Vegard's law: a fundamental relation or an approximation?
  8. Is it a compound or cluster energy formalism?
  9. Post-optimization elimination of inverted miscibility gaps
  10. Thermodynamic evaluation of the Au–Sn system
  11. Applications of thermodynamic calculations to Mg alloy design: Mg–Sn based alloy development
  12. Thermodynamic modeling of the CoO–SiO2 and CoO–FeO–Fe2O3–SiO2 systems
  13. Scheil–Gulliver simulation with partial redistribution of fast diffusers and simultaneous solid–solid phase transformations
  14. Analysis of X-ray extinction due to homogeneously distributed dislocations – Bragg case
  15. Applied
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  17. Thermodynamic optimisation of the FeO–Fe2O3–SiO2 (Fe–O–Si) system with FactSage
  18. Reassessment of the Al–Mn system and a thermodynamic description of the Al–Mg–Mn system
  19. Application of FactSage thermodynamic modeling of recycled slags (Al2O3–CaO–FeO–Fe2O3–SiO2–PbO–ZnO) in the treatment of wastes from end-of-life-vehicles
  20. Bio-inspired syntheses of ZnO-protein composites
  21. Preparation and characterization of cobalt–bismuth nano- and micro-particles
  22. Strain rate dependency on deformation texture for pure polycrystalline tantalum
  23. Notifications
  24. DGM News
https://doi.org/10.3139/146.101539
Keywords for this article
Thermodynamic modelling; Phase diagrams; Partially stabilised zirconia; Zirconates; Thermal barrier coatings

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Computational Thermochemistry
  5. Gunnar Eriksson 65 years
  6. Basic
  7. Vegard's law: a fundamental relation or an approximation?
  8. Is it a compound or cluster energy formalism?
  9. Post-optimization elimination of inverted miscibility gaps
  10. Thermodynamic evaluation of the Au–Sn system
  11. Applications of thermodynamic calculations to Mg alloy design: Mg–Sn based alloy development
  12. Thermodynamic modeling of the CoO–SiO2 and CoO–FeO–Fe2O3–SiO2 systems
  13. Scheil–Gulliver simulation with partial redistribution of fast diffusers and simultaneous solid–solid phase transformations
  14. Analysis of X-ray extinction due to homogeneously distributed dislocations – Bragg case
  15. Applied
  16. Thermodynamic modelling in the ZrO2–La2O3–Y2O3–Al2O3 system
  17. Thermodynamic optimisation of the FeO–Fe2O3–SiO2 (Fe–O–Si) system with FactSage
  18. Reassessment of the Al–Mn system and a thermodynamic description of the Al–Mg–Mn system
  19. Application of FactSage thermodynamic modeling of recycled slags (Al2O3–CaO–FeO–Fe2O3–SiO2–PbO–ZnO) in the treatment of wastes from end-of-life-vehicles
  20. Bio-inspired syntheses of ZnO-protein composites
  21. Preparation and characterization of cobalt–bismuth nano- and micro-particles
  22. Strain rate dependency on deformation texture for pure polycrystalline tantalum
  23. Notifications
  24. DGM News
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