Joining of SiC Ceramic by 22Ti-78Si High-temperature Eutectic Brazing Alloy

SiC ceramic was joined using 22Ti-78Si(wt%) brazing alloy which was prepared by the non-consumable arc-melting technology.The effects of brazing parameters on the microstructures and the fracture morphologies of the brazed joints were investigated by SEM.The mechanical properties of the brazed joints were measured by a universal mechanical testing machine.The results show that SiC ceramic is successfully joined in a proper condition,brazing temperature of 1380 1420℃,soaking time of 5 20min and the brazing alloy thickness of 50 200μm.The maximum shear strength of the brazed joint reaches 125 MPa at brazing temperature of 1400℃,soaking time of 10min and the brazing alloy thickness of 100μm.