Ti/Cu Brazing Using Zr-based Amorphous Filler

Vacuum brazing of pure Ti and pure Cu was achieved at 830 ℃ using Zr-Ti-Cu-Ni amorphous filler. The interfacial microstructure and mechanical properties of the joints were investigated using scanning electron microscopy and tensile test. The results show that when the holding time is 2 min, the joint microstructure is primarily composed of unreacted filler, Ti₂Cu and Ti Cu. When the holding time is 5 min, the joint structure is evolved into a multi-phase complex structure consisting of Ti₂Cu, Ti Cu and Cu₄Ti, etc. When the holding time is prolonged to 10 min, the microstructure of the joint is mainly composed of Ti Cu. When the holding time is 5 min, the tensile strength of the joint is the maximum of 147 MPa.