The partial mixing enthalpies of titanium, zirconium, and hafnium with liquid copper and iron alloys are studied by high-temperature calorimetry. The studies are carried out at a temperature of 1873 K along the sections with constant ratios x Cu/x Fe = 3, 1, and 1/3. Along all the studied sections, these functions are negative. The integral mixing enthalpies of components in the Cu–Fe–(Ti, Zr, Hf) systems along the studied sections are calculated by integrating the Gibbs–Duhem equation. The ΔH functions for ternary Cu–Fe–(Ti, Zr, Hf) melts are characterized by positive values in the vicinity of the binary Cu–Fe system and show negative values in a range of compositions with x Me > 0.1 (Me = = Ti, Zr, Hf).
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Translated from Poroshkovaya Metallurgiya, Vol. 56, Nos. 3–4 (514), pp. 143–153, 2017.
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Agraval, P.G., Dreval, L.A. & Turchanin, M.A. Interaction of Components in Cu–Fe Glass-Forming Melts with Titanium, Zirconium, and Hafnium. I. Calorimetric Study of Mixing Enthalpies. Powder Metall Met Ceram 56, 231–238 (2017). https://doi.org/10.1007/s11106-017-9890-8
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DOI: https://doi.org/10.1007/s11106-017-9890-8