Home – Home – Jornals – Combustion, Explosion and Shock Waves 2022 number 6

The influence of mechanical activation (MA) and Mn content on the rate and maximum combustion temperature, sample elongation during combustion, size of composite particles, mixture yield after MA, phase composition, and morphology of synthesis products in the Ni-Al-Mn system was studied. The mechanical activation of the Ni + Al + Mn mixture expanded the manganese content limit, at which it is possible to realize the combustion of samples without preheating, from 14 to 49 % (wt.). Preliminary MA made it possible to synthesize a compound containing all three initial metals - the (Ni, Mn)Al phase, which is an ordered solid solution of variable composition based on NiAl. In addition, after MA, the burning rate, elongation of product samples and their porosity increased, and the maximum combustion temperature decreased. An increase in the proportion of manganese in the Ni + Al + Mn mixture led to a decrease in the size of composite particles, elongation of product samples, the maximum combustion temperature, and an increase in the yield of the mixture after MA. The dependence of the combustion rate on the proportion of manganese in the activated mixture Ni + Al + Mn has a maximum.