Combustion synthesis is used as a joining technology to join Ni-based superalloys with in-situ synthesized NiAl filler. The synthesis mechanism is discussed. The microstructure of the joints is investigated and the joint strength is also evaluated by tensile testing. Combustion synthesis is used as a joining technology to join Ni-based superalloys with in-situ synthesized NiAl filler. The microstructure of the joints is investigated and the joint strength is also evaluated by tensile testing.