Effect of coal content and mechanical activation on the combustion of a $\mathrm{Ni}$–$\mathrm{Al}$–$\mathrm{C}$ system

Effect of carbon content in a $\mathrm{Ni}$–$\mathrm{Al}$–$\mathrm{C}$ system and preliminary mechanical activation on a burning rate, sample elongation, and yield of the mixture after mechanical activation, as well as on the structural features of combustion products is under study. Combustion in pressed samples from a mechanically preactivated $\mathrm{Ni}+\mathrm{Al}$ mixture at room temperature could not be activated. The introduction of carbon ($2$, $4$, $6\%$ (wt.)) Into the $\mathrm{Ni}+\mathrm{Al}$ reaction mixture allows for combustion in $\mathrm{Ni}$–$\mathrm{Al}$–$\mathrm{C}$ based pressed samples. Preliminary mechanical activation of the $\mathrm{Ni}+\mathrm{Al}+x\mathrm{C}$ reaction mixture expands a carbon content limit in the mixture at which the combustion of pressed samples is possible. In addition, mechanical activation, as well as an increase in the carbon content in the $\mathrm{Ni}$–$\mathrm{Al}$–$\mathrm{C}$ system reduces the burning rate. An explanation of the observed relationships is proposed.