The thermodynamic descriptions of the Al–Ni system from literature were reviewed and it was concluded that a thermodynamic re-assessment of the Al–Ni system focusing on the order-disorder transitions is necessary. The Al–Ni system was re-assessed in the present work using the order-disorder formalism to describe both B2 and L1₂ phases. To get a more accurate description of the L1₂ phase, thermodynamic constraints for the parameters of the L1₂ phase, which were often ignored, were applied during the thermodynamic assessment. The same constraints may be applied to the assessments of the other systems. Long-range ordering for the L1₂ phase and short-range ordering for the FCC_A1 phase have been discussed. The present work provides a quantitative description of the FCC_A1 and L1₂ phase equilibria of the important Ni-rich part of the system as well as improvements of some aspects of the Al-rich FCC_A1 phase. An improvement of the liquidus for the primary B₂ phase was also obtained with fewer parameters.

回顾了文献中对 Al-Ni 系统的热力学描述，得出的结论是，有必要对 Al-Ni 系统的热力学重新评估，重点是有序-无序转变。Al-Ni 系统在目前的工作中被重新评估，使用有序-无序形式来描述 B2 和 L1 ₂相。为了更准确地描述 L1 _{2相，在热力学评估期间应用了 L1 2}相参数的热力学约束，这些参数经常被忽略。相同的约束可以应用于其他系统的评估。_{L1 2}的远程订购已经讨论了 FCC_A1 相位的相位和短程排序。目前的工作提供了系统重要的富镍部分的 FCC_A1 和 L1 ₂相平衡的定量描述以及富铝 FCC_A1 相的某些方面的改进。使用更少的参数也获得了初级 B ₂相液相线的改进。