Dependence of Combustion Rates and Maximum Synthesis Temperatures on the Initial Sample Temperature for Initial and Activated Ti plus Ni Mixtures

In this study, the dependences of the velocities and maximum combustion temperatures on the initial temperature for initial and mechanically activated Ti + Ni mixtures are determined. For activated mixtures, the transition temperatures from the layer-by-layer combustion to the thermal explosion mode are established. The maximum heating temperatures during a thermal explosion are determined. Observations were made of changes in the appearance and phase composition of burnt samples at different initial temperatures and during the transition from the combustion mode to the thermal explosion mode. It was found that in the case of the initial mixture, in the entire investigated range of initial temperatures, combustion occurs with the formation of a liquid phase in the layer-by-layer combustion mode. In the case of activated mixtures, a solid-phase synthesis mode is realized both in the combustion mode and in the thermal explosion mode.