C/ SiC composites and TC4 titanium alloy were joined by brazing technique, using AgCuTi+10vol%
to 30vol%SiC composite filler metals and the thermal shock behavior of the joints were investigated between 600益
and room temperature. Interface microstructures and fracture cracks were investigated by scanning electron microscopy (with EDS energy spectrum). The results showed the thermal stress of the joints reduces evidently, with the increase
of the amount of SiC particle. In the brazing joints, thermal shock cracks can be found in the SiC ceramics near bond鄄
ing layer or in the fillet. It seems that wide鄄gap brazing samples have better thermal shock resistance, and no cracks
were obseured for filler metals containing 20vol% to 30vol% SiC particle, after 30 times thermal shock testing.