ICAMS / Interdisciplinary Centre for Advanced Materials Simulation


Thermodynamic modelling of the Pt-Al-Cr-Ni alloy system

Date: 19.03.2009
Place: Department of metal-based materials research, Universität Bayreuth, Bayreuth, Germany

Johannes Preußner, Lehrstuhl Metallische Werkstoffe, Universität Bayreuth, Bayreuth, Germany

Platinum base alloys with room temperature ductility and creep, oxidation and corrosion resistance have been developed for high temperature applications. A thermodynamic model of the Pt-Al-Cr-Ni system will be presented with special focus on the Pt-rich side. The Cr-Pt binary system has been reassessed with the CALPHAD method, based on experimental data and rst principles calculations. The four ternary alloy systems will be discussed based on available experimental data. A four sublattice model has been applied to describe the ordering reactions between the high temperature fcc phase and the low temperature L12 and L10 phases

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