||In this study, different kinds of silver-based filler BAg-1 and BAg-27, has been used to produce the C1100P pure copper brazed joint. The protective atmosphere and vacuum and other processes, were used for different brazing process. Heating rate, holding time, protective atmosphere and vacuum degree were the important parameter to affect the mechanical properties, bonding strength and microstructure of the joint. Lap Shear Adhesion be following the ASTM D5868 standard specification, the bonding strength of joints using a shear tensile test was obtained with varying lap length.
The microstructures of BAg-1 and BAg-27 joints were mainly composed of α-Cu and β-Ag, and the rupture occurred in the interface / parent material, which was caused by the diffusion of elements. Increase over time. The hardness of the interface was measured by microhardness. BAg-1 had the highest hardness of about 146 HV0.05 for 5 minutes, while BAg-27 was 238 HV0.05. The hardness did not be changed by the holding temperature. However, EPMA analysis showed that with the holding temperature and temperature increased, the diffusion of elements tends to be serious, the alloying of the base material leads to its hardening and brittle. Shear strength of BAg-1 and BAg-27 joints are holding at brazing temperature for 5 minutes, were 103.9 and 66.7MPa, respectively. When the temperature time duration is over 10 minutes, the increase in the interface between the alloyed interface and the parent material leads to the brittleness of the material and the decrease in the shear tensile strength.