Study of the rate thermokinetic characteristics of the synthesis of nickel and titanium aluminides in layered nanocomposite structures of thin films based on molecular dynamics simulation

On the basis of molecular dynamics simulation, as the rate thermokinetic characteristics of the process of self-propagating high-temperature synthesis of nickel and titanium aluminides, the maximum temperature growth rate in the combustion front and the velocity of the combustion front in layered nanocomposite Ni/Al and Ti/Al thin films are studied. The maxima of the temperature growth rate in the combustion front and the velocity of the combustion front, calculated from thermograms in various cross sections of thin films under study with layer thicknesses from 1.3 to 8.13 nm, reach maximum values in the ranges of 10$^{11}$–10$^{12}$ K/s and 17–50 m/s, respectively. Linear dependences of the rate thermokinetic characteristics on the specific interface area of heterogeneous layers are established with the invariance of the stoichiometry and temperature of the sections of the stationary combustion regime.