Brazing of carbon fibre reinforced SiC composite and Ti alloy using Cu–Ti–C filler materials

Abstract

Carbon fibre reinforced SiC (C_f/SiC) was successfully joined to Ti alloys with Cu–Ti–C mixed powder by brazing. Microstructures of the brazed joints were investigated by SEM, EDS and XRD. The mechanical properties of the brazed joints were measured by a mechanical testing machine. The results showed that the performed joints have dense bonding layers reinforced by residual graphite and in situ synthesised TiC from the reaction of C and Ti in the bonding layers. The composite brazing layers relaxed the thermal stress of the joints effectively. These characteristics were beneficial to the joints, of which the shear strength was remarkably higher than the optimal shear strengths of the joints brazed with pure Cu–Ti.