Abstract—The enthalpies of formation of γ- and δ-modifications of the TiCu phase were estimated using the density-functional method. The enthalpies of formation are –22 and –12.8 kJ/mol for the γ- and δ-TiCu, respectively. The comparison of X-ray data and quantum-chemical calculations demonstrates that the discrepancy in the experimental values of enthalpy of formation of the TiCu crystals correlates with different content of the γ and δ modifications in the TiCu alloy.
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The work is performed within the state assignment ISMAN (theme 44 No. 0091-2018-0001). S.A. Guda acknowledges the financial support of The Southern Federal University (VnGr-07/2017-08).
Translated by O. Golovnya
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Konovalihin, S.V., Chuev, I.I., Guda, S.A. et al. Estimation of Enthalpy of Formation of TiCu by Density Functional Method. Phys. Metals Metallogr. 121, 1188–1192 (2020). https://doi.org/10.1134/S0031918X20120078
- intermetallic TiCu
- enthalpy of formation
- density-functional method