Effect of Cu content on the reaction behaviors of self-propagating high-temperature synthesis in Cu–Ti–B4C system

Abstract: The SHS reaction behaviors of the Cu–Ti–B4C system with various Cu content were investigated. Theoretical calculation of the adiabatic temperatures reveals that the reaction in the Cu–Ti–B4C system is self-sustainable for the presence of 0–72.22wt.% Cu in the reactants without any preheat. With the increase of Cu content, the adiabatic temperatures, combustion temperatures and wave velocity decrease greatly, while the ignition time shows first a remarkable decrease and then an increase with the minimum value at 20wt.% Cu. Moreover, with the increase of Cu content, the sizes of the TiC and TiB2 grains decrease considerably. [Copyright &y& Elsevier]