  Molecular dynamics simulation of Al/Ni multilayered foils reveals a range of
different reaction pathways depending on the temperature of the reaction. At
the highest temperatures Fickian interdiffusion dominates the intermixing
process. At intermediate temperatures Ni dissolution into the Al liquid becomes
the dominant mechanism for intermixing prior to formation of the B2
intermetallic phase. At lower temperatures the B2 intermetallic forms early in
the reaction process precluding both of these mechanisms. Interdiffusion and
dissolution activation energies as well as diffusion prefactors are extracted
from the simulations.
