The numerical simulation of the heterogeneous composition effect on the combustion synthesis of TiB2 compound

Abstract Heterogeneous distributions of reactants and diluent are usually found during powder preparation for combustion synthesis. The occurrence of the composition heterogeneity is thought to result in local variations of the thermophysical/chemical reactant parameters, such as density, heat capacity, and thermal conductivity; thus change combustion temperature, propagation velocity, and propagation pattern of combustion front. This study aims to address the composition heterogeneity effect on Ti+2B combustion synthesis, by varying composition, which will further change the parameters of reactants at each node. The correlations of reactant and diluent heterogeneities with propagation velocity and combustion temperature are respectively investigated in this study. In addition, the generated heterogeneity maps, considering the reactant and diluent heterogeneities concurrently, provide a better understanding of the heterogeneous composition effect on the propagation velocity and combustion synthesis during combustion synthesis.