Phase relations in the ZrO2-La2O3-Y2O3-Al2O3 system

• Applicant: Professor Dr. Fritz Aldinger
• Subject Area: Synthesis and Properties of Functional Materials
• Term: from 2005 to 2006
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5455729

The self-consistent thermodynamic database for the ZrO2-La2O3-Y2O3-Al2O3 will be arrived. The parameters of including binary and ternary systems will be assessed using available experimental phase equilibrium data and thermodynamic values measurement using Calphad approach. The phase equilibria will be experimentally studied in the ZrO2-La2O3-Y2O3 and La2O3-Y2O3-Al2O3 systems. The preliminary calculations based on extrapolations from binary systems into ternaries will be used for selection of compositions to be investigated. The obtained thermodynamic description will be applied to calculate equilibrium phase diagrams important for understanding interactions between layers in thermal barrier coating (TBC) systems and interaction between cathode material and solid electrolyte in solid oxide fuel cell. The calculations of diffusionless transformations will be used to understand effect of doping on TBC stability and durability.

• DFG Programme: Research Grants
• Participating Person: Dr. Matsvei Zinkevich