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Thermodynamic assessment of the Co-Ta system



Peisheng Wang, J?rg Ko?mann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson


The Co-Ta system has been reviewed and the thermodynamic description was re-assessed in the present work. DFT (density functional theory) calculations considering spin polarization were performed to obtain the energies for all end-member configurations of the C14, C15, C36 and μ phases for the evaluation of the Gibbs energies of these phases. The phase diagram calculated with the present description agrees well with the experimental and theoretical data. Considering the DFT results was essential for giving a better description of the μ phase at lower temperatures.
Calphad-Computer Coupling of Phase Diagrams and Thermochemistry


TCP phase, ?-?’, Co-based superalloys, CALPHAD


Wang, P. , Ko?mann, J. , Kattner, U. , Palumbo, M. , Hammerschmidt, T. and Olson, G. (2018), Thermodynamic assessment of the Co-Ta system, Calphad-Computer Coupling of Phase Diagrams and Thermochemistry, [online],, (Accessed June 21, 2024)


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Created December 19, 2018, Updated October 12, 2021