The mixing enthalpies of liquid Hf-Ni-Ti alloys were measured at 1873 K by applying a high-temperature isoperibolic calorimeter. The investigation was performed along the x Hf / x Ni = 3 section at x Ti = 0-0.64 and along the x Ni / x Ti = 3 section at x Hf = 0-0.57. The limiting partial enthalpy of mixing of undercooled liquid titanium in liquid Hf-Ni alloy is (− 92 ± 15) kJ mol −1 . The partial enthalpy of mixing of undercooled liquid hafnium at infinite dilution is (− 163 ± 12) kJ mol −1 . The integral mixing enthalpies are negative nearly in the entire composition range. The thermodynamic properties of liquid quaternary alloys are modelled using the associate solution model. The amorphization ranges in ternary and quaternary systems are predicted by considering a total molar fraction of associates in liquid alloys.

中文翻译：

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液态 Hf-Ni-Ti 合金混合焓的量热研究及第四元液态 Cu-Hf-Ni-Ti 合金的热力学性质和化学有序性

液态 Hf-Ni-Ti 合金的混合焓是在 1873 K 下通过应用高温等周热量计测量的。调查沿 x Hf / x Ni = 3 截面在 x Ti = 0-0.64 处进行，并沿 x Ni / x Ti = 3 截面在 x Hf = 0-0.57 处进行。过冷液态钛在液态 Hf-Ni 合金中的混合极限部分焓为 (- 92 ± 15) kJ mol -1 。过冷液态铪在无限稀释下的混合部分焓为 (- 163 ± 12) kJ mol -1 。在整个组成范围内，积分混合焓几乎为负。液态四元合金的热力学性质使用关联溶液模型进行建模。通过考虑液态合金中缔合体的总摩尔分数来预测三元和四元体系中的非晶化范围。