Microstructure and mechanical performance of brazed joints of Cf/SiC composite and Ti alloy using Ag-Cu-Ti-W

C-f/SiC composite was brazed to Ti alloy using interlayer of Ag - Cu - Ti - W mixed powder. The effects of W content and brazing parameters on the microstructure and properties of the brazed joints were investigated. The results show that W grains mainly distribute in Ag phase in the brazing layer and provide the effects of reinforcement and lowering residual thermal stress on the joint. The room temperature and 500 degrees C shear strengths of the joints performed at 500 degrees C for 30 min with Ag - Cu - Ti - 50W (vol.-%) are remarkably higher than the optimal strengths of the joints brazed with Ag - Cu - Ti.