The need to produce oxidation- and corrosion-resistant joints for service at high temperatures@ and the need to develop brazing filler metals that are compatible with the base metals used to obtain maximum performance under these conditions@ has prompted extensive research by many organizations. As a result of this research@ a whole new industry has been created. Much of the impetus behind these efforts is associated with the joint requirements of the aerospace@ jet engine and nuclear industries. Like other metal-joining processes@ brazing was long considered to be more an art than a science. The research on high-temperature brazing has done much to dispel this belief. Before discussing high-temperature brazing as a separate entity@ it is well to reflect on the general attributes of the brazing process. Brazing is a process that is well suited to mass-production operations where many parts must be joined simultaneously or where large@ complex assemblies must be joined in a single operation. Brazing is often the only practical method to assemble parts whose dimensions@ design@ or materials of construction preclude joining by fusion-welding methods.