Publications

Thermodynamic assessment of the Co-Ta system

Wang, P. and Koßmann, J. and Kattner, U.R. and Palumbo, M. and Hammerschmidt, T. and Olson, G.B.

CALPHAD: COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume: 64 Pages: 205-212
DOI: 10.1016/j.calphad.2018.12.002
Published: 2019

Abstract
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. © 2018 Elsevier Ltd

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