Conventional fusion welding procedures are not likely to be useful for joining NiAl because of its poor low temperature ductility. Thus, the potential use of this material could be limited. This study was designed to demonstrate the feasibility of using a diffusion brazing process to fabricate NiAl components. A unique feature of this process is the development of self-generated filler metal through elevated temperature vacuum exposure. Butt joints were made in extruded bar and joint quality was evaluated using metallographic techniques. Sound joints, which were produced with complete grain growth across the braze interface, were indistinguishable from the base metal. Thus, the feasibility of diffusion brazing NiAl was established.