Abstract
The effect of the content of \(\textrm{Ti}+2\textrm{B}\) and \(\textrm{Ti}+\textrm{C}\) mixtures and mechanical activation (MA) on the burning rate, the yield of the mixture after MA, and the morphology and phase composition of combustion products of the ( \(\textrm{Ti}+2\textrm{B}\) ) + ( \(\textrm{Ti}+\textrm{C}\) ) system has been investigated. Mechanical activation of the \(\textrm{Ti}+2\textrm{B}\) mixture for 5 min leads to mechanochemical synthesis with the formation of the \(\textrm{TiB}_{2}\) product. Mechanochemical synthesis does not occur when adding the \(\textrm{Ti}+\textrm{C}\) powder to the activated mixture of \(\textrm{Ti}+2\textrm{B}\) . Increasing the content of \(\textrm{Ti}+\textrm{C}\) in the ( \(\textrm{Ti}+2\textrm{B}\) ) + ( \(\textrm{Ti}+\textrm{C}\) ) mixture leads to deterioration of the compressibility of samples after MA. The burning rate of the initial mixtures of ( \(\textrm{Ti}+2\textrm{B}\) ) + ( \(\textrm{Ti}+\textrm{C}\) ) decreases with increasing content of \(\textrm{Ti}+\textrm{C}\) . Samples of the combustion products of the initial mixtures retain integrity after the synthesis. Mechanical activation doubles the burning rate of samples of the \(\textrm{Ti}+\textrm{C}\) mixture. The burning rate of the activated mixture of ( \(\textrm{Ti}+2\textrm{B}\) ) + ( \(\textrm{Ti}+\textrm{C}\) ) increases with increasing content of \(\textrm{Ti}+\textrm{C}\) , and samples of the products are dispersed during combustion. For a mixture of equal mass fractions of the initial \(\textrm{Ti}+2\textrm{B}\) powder and the activated \(\textrm{Ti}+\textrm{C}\) powder, the dependence of the burning rate of the mixture on the content of \(\textrm{Ti}+\textrm{C}\) in it has a minimum; when the investigated composition is dominated by the \(\textrm{Ti}+2\textrm{B}\) mixture, samples of the product retain integrity.
