Special features of structural and phase transformations occurring in annealing of an explosion-welded Al – Zr bimetal are considered. It is shown that heat treatment causes formation and growth of an intermetallic layer on the interface, which has a hardness of 9 GPa. The methods of microscopic x-ray spectrum analysis and of phase analysis with the use of synchrotron radiation are used to show that the intermetallic layer is represented by a ZrAl₃ phase with a D0₂₃-type structure. The lattice constants of this phase vary gradually from the metal-intermetallic interfaces to the center of the layer. Quantum-chemical modeling by the method of density functional is used to show that the zirconium trialuminide is in the steadiest state at a certain distance from the interface due to the process of secondary recrystallization and the accompanying annihilation of crystal structure defects.

考虑了爆炸焊接 Al-Zr 双金属退火过程中发生的结构和相变的特殊特征。结果表明，热处理导致界面上金属间化合物层的形成和生长，其硬度为9 GPa。采用显微X射线能谱分析和同步辐射物相分析方法表明，金属间化合物层为ZrAl₃ 具有 D0₂₃ 型结构的相。该相的晶格常数从金属-金属间化合物界面到层的中心逐渐变化。采用密度泛函方法进行量子化学建模，结果表明，由于二次再结晶过程以及随之而来的晶体结构缺陷的湮灭，三铝化锆在距界面一定距离处处于最稳定状态。