The results of studying the fine structure, chemical composition, and phase composition of boundaries between components of the Cr₃C₂–Ti hard alloy containing 40 wt % titanium binder in the state after the explosion compaction, as well as after heat treatment, are presented. The heating temperature of the powder mixture during the shock-wave loading is 730°C and the pressure is 14 GPa, which provides the maximal compaction and consolidation of the powder mixture without sintering. Compact samples are heat-treated at a temperature from 400 to 700°C with holding in the furnace for 1 h with subsequent cooling in calm air. The equilibrium phase composition is calculated by numerical thermodynamic modeling using the Thermo-Calc software complex. The structure and elemental composition are investigated using FEI Quanta 3D and Versa 3D electron microscopes with an integrated system of the focused ion beam for foil preparation, as well as FEI Techai G2 20F and Titan 80-300 transmission electron microscopes with the mode of transmission foil scanning. A Bruker D8 Advance diffractometer is used to perform X-ray phase analysis. It is shown that the formation of strong interphase boundaries during the explosion compaction of mixtures of titanium carbide and chromium carbide powders is accompanied by chemical interaction between components with the formation of near-boundary layers having a total thickness on the order of 90 nm. The continuous monotonic variation in Cr and Ti contents is observed in the limits of the transient layer with an almost invariable carbon concentration. The phase composition of the layers corresponds to the equilibrium one calculated under the shockwave compression pressure of 12 GPa, but it is thermodynamically nonequilibrium under standard conditions. Heating to 400°C leads to the dissolution of near-boundary layers and transition of Cr₃C₂–Ti hard alloys into the two-phase state. Alternating layers consisting of carbon-depleted chromium carbides (Cr₇C₃, Cr₂₃C₆) and titanium carbide (TiC), formed due to the carbon diffusion from the initial chromium carbide (Cr₃C₂) to titanium, are formed along interfacial boundaries at a temperature of 700°C.

研究Cr ₃ C ₂组分之间边界的精细结构，化学组成和相组成的结果–介绍了在爆炸压实后以及热处理后均含有40 wt％钛粘合剂的Ti硬质合金。在冲击波加载过程中，粉末混合物的加热温度为730°C，压力为14 GPa，可最大程度地压实和固结粉末混合物而无需烧结。将紧凑的样品在400至700°C的温度下进行热处理，并在炉中保持1小时，然后在平静的空气中冷却。使用Thermo-Calc软件复合体通过数值热力学建模来计算平衡相组成。使用FEI Quanta 3D和Versa 3D电子显微镜对聚焦离子束的集成系统进行箔制备，研究了结构和元素组成，以及具有透射箔扫描模式的FEI Techai G2 20F和Titan 80-300透射电子显微镜。Bruker D8 Advance衍射仪用于执行X射线相位分析。结果表明，在碳化钛和碳化铬粉末混合物的爆炸压实过程中，牢固的相间边界的形成伴随着组分之间的化学相互作用，形成了总厚度约为90nm的近边界层。在过渡层的极限中观察到Cr和Ti含量的连续单调变化，并且碳浓度几乎不变。层的相组成对应于在12 GPa的冲击波压缩压力下计算出的平衡相，但是在标准条件下它在热力学上是不平衡的。加热到400°C会导致近边界层的溶解和Cr的转变₃ C ₂ -Ti硬质合金进入两相状态。沿着由最初的碳化铬（Cr ₃ C ₂）向钛的碳扩散形成的交替层由贫碳碳化铬（Cr ₇ C ₃，Cr ₂₃ C ₆）和碳化钛（TiC）组成。温度为700°C时的界面边界。