Reliable brazing of Ti60 alloy and ZrO2 ceramic was successfully achieved using AgCu filler metal. The interfacial microstructure and reaction products of Ti60/AgCu/ZrO2 joints brazed at different temperatures were investigated by the Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and X-Ray Diffractometer (XRD). Results show that the typical interfacial microstructure of the Ti60/AgCu/ZrO2 joint was Ti60 alloy/α-Ti+Ti2Cu diffusion layer/TiCu+TiCu2/Ag(s,s)+Cu(s,s)/Ti3Cu3O layer/TiO layer/ZrO2 ceramic. With the increase of the brazing temperature, the thickness of the diffusion layer of α-Ti+Ti2Cu, TiCu+TiCu2 layers, Ti3Cu3O layer and TiO layer adjacent to the ZrO2 ceramic increased gradually, and the granular Ti-Cu IMCs grew gradually, meanwhile the content of the Ag-based solid solution and Cu-based solid solution decreased. The shear test indicates that the joint brazed at 900℃ for 10 min exhibited the highest shear strength of 124.9 MPa tested at room temprature, and the joint tested at 500℃ and 600℃ exhibited the shear strength of 83.0 MPa and 30.2 MPa, respectively. Typical fracture analysis displays that the brazed joint tended to fracture at the interface between the ZrO2 ceramic and the brazing seam, and in the brazing seam adjacent to the interface.
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