Contribution to thermodynamic description of Al-Pd system

13th International Conference on Quasicrystals

urika, Libor^1 ; erniková, Ivona^1 ; ika, Roman^1 ; Janovec, Jozef^2

Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Paulinska 16, Trnava

917 24, Slovakia^1

Slovak University of Technology in Bratislava, Vazovova 5, Bratislava

812 43, Slovakia^2

关键词: Approximants;    CALPHAD method;    Quasicrystalline;    Stoichiometric phasis;    ThermoCalc software;    Thermodynamic description;    Thermodynamic parameter;    Two-sublattice models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/809/1/012008/pdf
DOI  :  10.1088/1742-6596/809/1/012008

来源: IOP

【 摘 要 】

The homogeneity range around the Al3Pd stoichiometry, representing the family of quasicrystalline approximants denoted asnand/or (Al3Pd), was involved in the calculated Al-Pd phase diagram. The calculations were performed by means of the CALPHAD method using the Thermo-Calc software. A novel thermodynamic description of then/(Al3Pd) phase was proposed based on the (Al%,Pd)3(Al,Pd%)1two-sublattice model. Existing thermodynamic parameters of stoichiometric phases Al4Pd and Al21Pd8were slightly adjusted. The transition between phasesn/(Al3Pd) and γ-Al21Pd8was predicted thermodynamically at 619°C.