中文摘要：

有关Ni-Zr二元系中化合物NiZr和NiZr2之间的共晶温度,在热力学计算结果和实验数据之间存在较大差异,对此本文进行了针对性实验测定。利用氩气保护电弧熔炼,在NiZr和NiZr2成分范围内,制备了65wt%、68wt%、72wt%和74wt%Zr的Ni-Zr合金。选用商用氧化铝坩埚和自制氧化锆坩埚,以不同加热速率分别进行了差示扫描量热（DSC）测量,最终确定该共晶温度为1022±5℃。同时对实验合金与坩埚的反应情况进行了热力学分析,证实在测量温度范围内（〈1100℃）采用氧化铝坩埚进行相关实验的适用性;在1170℃,氧化锆本身存在由单斜向四方的同素异构转变,氧化锆坩埚适用于该温度以下含锆合金的相平衡与热力学测量。

英文摘要：

Considering the discrepancy between the thermodynamic calculations and the experimental measurements from literature, the eutectic temperature between NiZr and NiZr2 compounds was determined experimentally in the present work. Ni-Zr alloys with the composition of 65wt%, 68wt% , 72wt% and 74wt% Zr, located between NiZr and NiZr2 , were prepared by melting in an arc furnace under a purified argon atmosphere. Using both commercial alumina and self-made zireonia crucibles, the phase transformation temperature was measured at different heating rates by differential scanning calorimetry（DSC）, and the temperature was determined to be 1022 ±5℃. In the mean while, the reactions between the experimental alloys and the crucibles were predicted thermodynamically, which confirmed the applicability of the alumina crucibles under the experimental temperature（ 〈1100℃ ）. Zireonia has an allotropic transformation from monoclinic to tetragonal type at 1170℃, below which the zirconia crucibles can be used in the measurements of phase equilibria and thermodynamics for zirconium-containing alloys.