It is believed that at higher potential foils can be overheated and deformed, which can quench the reaction propagation. The quenched reaction front with deformation will be explained in more detail in the next section. The reaction front speed of 1Ti/2Al reactive foil is nearly constant for different potentials. The high conductivity of this foil type and moderate diffusion distance of atomic mixing exhibit nearly constant reaction velocity. With increasing activation potentials, the reaction speed of 1Ti/3Al foils increases and then decreases. The possible reason is that the higher energy input exceeds the critical energy required for reaction front propagation. The current flows in the foils heat the system, which enhances the atomic mixing
