Joining of C_f/SiC Composite to Ti Alloy using AgCuTi-W Composite Filler Materials

Cf/SiC was successfully joined to Ti alloy with AgCuTi-W mixed powder by some suitable brazing parameters.Microstructures of the brazed joint were investigated by SEM,EDS and XRD.The mechanical properties of the brazed joints were measured by mechanical testing machine.The results showed that Ti element in the interlayer can reaction with the brazed composite,a mixture of Ti3SiC2,Ti3Si and TiC composites finally formed the reaction layer between composite and interlayer.Ti alloy constantly dissolves and Cu diffuses into the Ti alloy,forming the diffusion–reaction layers between interlayer and Ti alloy.The performed joints have dense bonding layers reinforced by W.These composite brazing layers relaxed the thermal stress of the joint effectively.These characteristics were beneficial to the joint,of which the shear strength were remarkably highly than the optimal shear strengths of the joint brazed with pure AgCuTi.