Ultrasonic-assisted transient liquid phase bonding of pure Cu with Sn-In solder was realized at 140°C in air. Shear test was carried out on the weldment. The effect of ultrasonic vibration on microstructure and mechanical properties of the weld seam was studied. The relationship between the formation of intermetallic compounds and their mechanical properties was analyzed by means of electronic scanning and element analysis. (Sn) solid solution, ε(Cu₃Sn), η(Cu₆Sn₅), Cu₁₀Sn₃, Cu₁₁In₉, Cu₉In₄, γ, β phase were detected in the weld seam. When the ultrasonic vibration time is 30 s, the shear strength reached a maximum of 22.76 MPa. The fracture occurred on the surface of the fine-grained η(Cu₆Sn₅) phase. The fracture surface was partially covered with coarse-grained Cu₁₁In₉ phase, which belonged to a brittle fracture.

在140°C的空气中，实现了纯铜与Sn-In焊料的超声辅助瞬态液相键合。在焊件上进行了剪切测试。研究了超声振动对焊缝组织和力学性能的影响。通过电子扫描和元素分析，分析了金属间化合物的形成与其力学性能之间的关系。（Sn）固溶体ε（Cu ₃ Sn），η（Cu ₆ Sn ₅），Cu ₁₀ Sn ₃，Cu ₁₁ In ₉，Cu ₉ In ₄焊缝中检测到γ，γ，β相。当超声振动时间为30 s时，剪切强度最大达到22.76 MPa。断裂发生在细晶η（Cu ₆ Sn ₅）相的表面上。断口表面被部分粗大的Cu ₁₁ In ₉相覆盖，属于脆性断口。