Infrared Brazing Zirconium using Two Silver Based Foils

Ag-based brazing foils, BAg-8 (72Ag-28Cu in wt%) and Ticusil® (68.8Ag-26.7Cu-4.5Ti in wt%) were selected to braze Zr. Interfacial AgCu4Zr, CuZr2 reaction layers and Ag-rich matrix dominate BAg-8 brazed joint, and fractograph after shear test shows ductile dimple fracture with plastic sliding marks. Ticusil® joint brazed at 910 °C for 300 s is comprised of Cu9Zr11 and AgZr intermetallics, and fractograph after shear test displays brittle cleavage fracture.