The results of microstructural, X-ray diffraction, differential thermal, and electron microprobe analyses of Zr–ZrCo–ZrNi cast alloys were used to first construct the liquidus surface of the Zr–ZrCo–ZrNi system on the composition triangle. The liquidus surface was found to consist of four primary crystallization surfaces of the phases: a solid solution of β-Zr and phases based on ZrCo (δ) and ZrNi (δ₂) compounds and a θ phase (continuous solid solutions between Zr₂Co and Zr₂Ni isostructural compounds of AlCu₂ type). In crystallization of the alloys, an invariant four-phase transition equilibrium with participation of the liquid phase, L + δ ↔ δ₂ + θ, was observed at 1025°C. The constitution of the quasibinary sections of the ZrCo–ZrNi and Zr₂Co–Zr₂Ni systems, showing a decrease in the solidus and liquidus temperatures of the alloys with increasing nickel content, determined the type of invariant equilibrium. The study of cast alloys confirmed that the phase based on Zr₃Co (η) compound formed by peritectoid reaction. A scheme of reactions occurring in Zr–ZrCo–ZrNi alloys in the temperature range from crystallization to solid-state transformations associated with the peritectoid formation of the η -phase and with the martensitic transformation of β ↔ α zirconium was developed. Two vertical sections were constructed using data on phase equilibria in the Zr–Co and Zr–Ni boundary binary systems and data on equilibria on the solidus surface and at 900 and 800°C in the Zr–ZrCo–ZrNi ternary system. Data on the interaction of individual alloys in the system with hydrogen were obtained. Significant rates of absorption and release of hydrogen from the hydrides were observed above room temperature.

Zr–ZrCo–ZrNi铸造合金的微观结构，X射线衍射，差热和电子微探针分析的结果被用于首先在组成三角形上构造Zr–ZrCo–ZrNi系统的液相线表面。液相线表面被发现包括相位的四个主要结晶表面：基于ZrCo（δ）和ZrNi（δβ-Zr和相的固溶体₂）的化合物和θ相（锆之间连续固溶体₂共同和AlCu ₂型的Zr ₂ Ni同构化合物）。在合金中，与液相的参与，L +δ↔δ不变四相变平衡的结晶₂在1025℃下观察到+θ。ZrCo–ZrNi和Zr ₂ Co–Zr ₂ Ni系统的准二元截面的组成表明合金的固相线和液相线温度随着镍含量的增加而降低，从而确定了恒定平衡的类型。铸造合金的研究证实了基于Zr ₃的相通过腹膜反应形成的Co（η）化合物。提出了一种在Zr–ZrCo–ZrNi合金中发生的反应方案，该温度范围是从结晶到固态转变的相关温度范围，该转变过程与η相的类周质形成以及与β↔α锆的马氏体转变有关。使用Zr-Co和Zr-Ni边界二元系统中的相平衡数据以及固相线表面以及900-800°C和Zr-ZrCo-ZrNi三元系统中的相平衡数据，构造了两个垂直截面。获得了系统中单个合金与氢相互作用的数据。在室温以上观察到从氢化物吸收和释放氢的显着速率。