Combustion joinining of carbon/carbon composites by a reactive mixture of titanium and mechanically activated nickel/aluminum powders

Combustion joining of carbon/carbon (C/C) composites using a mixture of titanium and mechanically activated Ni/Al powders as a reactive medium is reported. A minimum preheating of the sample stack to 630 K is required to initiate the joining process. A robust crack- and pore-free joint layer (∼75−100 μm in thickness), which is composed of NiAlx and TiCy(Oz) phases, is produced. Tensile-strength testing of the joined C/C composites shows that the fracture does not occur along the joint layer.