Carbon/carbon composites plate is brazed to Ni-base super alloy, Inconel 600 using Fe-Cr base brazing filler. The Fe-Cr base brazing filler slurry was pasted on the C/C composites surface. The brazed surface of C/C composites was the cross section of laminates to make the residual thermal stress induced by the mismatch in the coefficient of thermal expansion. The brazing temperature was 1,050°C and the keeping time was 300s. The cooled specimen had crack just below the brazing interface inside of C/C composites. But the observation of microstructure revealed the sound bonding between the brazing filler layer and C/C composites. The Ni-base super alloy seemed to experience the dissolve and solidification process during the brazing. The diffusion of P in the Fe-Cr base alloy took the major role in formation of the microstructure.
