In recent decades, metal-intermetallic laminated (MIL) composites are of great interest to the scientific community. The intermetallic layers in such composites possess a strong crystallographic texture and can form various superstructures. However, these effects are rarely discussed in the literature. By application of synchrotron X-ray diffraction (SXRD) we show, that an intermetallic layer in explosively welded and annealed Ti–Al-based MIL composite consists of two modifications of titanium trialuminide: TiAl₃ with a D0₂₂ structure and its superstructure Ti₈Al₂₄. According to SXRD analysis, the volume fraction of the Ti₈Al₂₄ modification increases from Al/intermetallic interface towards Ti/intermetallic interface. This may be caused by the lack of Al for the formation of stoichiometric titanium trialuminide near the interface with Ti, which leads to the formation of a long-period structures having Ti_1+xAl_3-x stoichiometry. Two types of fiber texture were formed in the titanium trialuminide layer: [001] near the Ti/intermetallic interface and <100> near the Al/intermetallic interface, which is caused by peculiarities of Ti and Al atoms migration. To explain the features of the forming texture, hypothetical mechanisms of Al and Ti diffusion in the intermetallic layer are discussed in this study: a vacancy diffusion, an interstitial diffusion, and a six jump vacancy cycle (6JVC).

在最近的几十年中，金属-金属间层压（MIL）复合材料引起了科学界的极大兴趣。这种复合材料中的金属间层具有很强的晶体织构，可以形成各种上部结构。但是，这些影响很少在文献中讨论。通过应用同步加速器X射线衍射（SXRD），我们发现，爆炸焊接和退火的Ti-Al基MIL复合材料中的金属间层包括三铝钛合金的两种改性：具有D0 ₂₂结构的TiAl ₃及其超结构Ti ₈铝₂₄。根据SXRD分析，Ti ₈ Al ₂₄的体积分数变型从Al /金属间界面向Ti /金属间界面增加。这可能是由于在与Ti的界面附近缺乏用于形成化学计量的三酰亚胺化铝的Al所致，这导致形成了具有Ti _{1 + x} Al _3-x化学计量的长周期结构。在三铝钛化物层中形成了两种类型的纤维织构：在Ti /金属间界面附近的[001]和在Al /金属间界面附近的<100>，这是由于Ti和Al原子迁移的特殊性所致。为了解释形成织构的特征，本研究讨论了金属间层中Al和Ti扩散的假想机理：空位扩散，间隙扩散和六跳空位循环（6JVC）。