Combustion synthesis in bi-layered (Ti−Al)/(Ni−Al) system

We investigated the peculiarities of the combustion wave propagation as well as the structure and phase formation in bi-layered metal powder compacts of (Ti − Al)/(Ni − Al), with a special emphasis on the use of infrared thermography to monitor the reaction front propagation. The location of the combustion wave front along the direction of propagation at different times was determined to calculate the front velocity. The data of SEM analysis demonstrated the welding of two layers during combustion with the formation of a transition layer with a thickness of about 200 μm and a sharp diffusion barrier for Ti in the Ni-Al layer.