To provide a basic guide for the design of Cu–Cr-based alloys, phase equilibrium relations in the Cu–Cr–Ti system have been studied using diffusion triples and typical equilibrated alloys. Based on the results from electron-probe microscopy analysis and x-ray diffraction, isothermal sections of the Cu–Cr–Ti ternary system at 1073 and 973 K were constructed, wherein 9 and 11 three-phase equilibria were determined, respectively. A ternary phase with an approximate composition of (Cu, Cr)₄Ti₃ was detected and named as τ₁. The binary Cu₄Ti₃ phase does not connect with τ₁ in the ternary region. Solid solution phases (Cu, Cr)₃Ti₂ and τ₁ were identified and confirmed in both diffusion triple and alloy samples. The solubility of Cr in Cu₃Ti₂ extends to 12 at.% at both 1073 and 973 K. (Cu, Cr)₃Ti₂ and Cu₃Ti₂ form a continuous solid solution at 1073 K while do not exist as one stable phase at 973 K. In addition, two two-phase regions of Cu₄Ti + (Cu, Cr)₃Ti₂ and Cu₄Ti₃ + (Cu, Cr)₃Ti₂ transform to the three-phase regions of Cu₄Ti + Cu₄Ti₃ + (Cu, Cr)₃Ti₂ as the temperature decreases from 1073 to 973 K.

为了为 Cu-Cr 基合金的设计提供基本指导，使用扩散三元组和典型的平衡合金研究了 Cu-Cr-Ti 系统中的相平衡关系。基于电子探针显微镜分析和 X 射线衍射的结果，构建了 Cu-Cr-Ti 三元体系在 1073 和 973 K 的等温截面，其中分别确定了 9 个和 11 个三相平衡。检测到组成近似为 (Cu, Cr) ₄ Ti ₃的三元相并将其命名为 τ ₁。二元Cu ₄ Ti ₃相在三元区不与τ ₁连接。固溶相 (Cu, Cr) ₃ Ti ₂和 τ₁在扩散三元组和合金样品中均得到鉴定和确认。Cr 在 Cu ₃ Ti _{2 中}的溶解度在 1073 K 和 973 K 时均扩展到 12 at.%。 (Cu, Cr) ₃ Ti ₂和 Cu ₃ Ti ₂在 1073 K 形成连续固溶体，但不以稳定形式存在相在 973 K。此外，Cu ₄ Ti + (Cu, Cr) ₃ Ti ₂和 Cu ₄ Ti ₃  + (Cu, Cr) ₃ Ti ₂的两个两相区域转变为 Cu ₄的三相区域Ti + Cu ₄ Ti ₃  + (Cu, Cr)₃ Ti ₂随着温度从 1073 K 降低到 973 K。