A MICROMECHANISTIC MODEL OF THE COMBUSTION SYNTHESIS PROCESS - MODES OF IGNITION

A theoretical model of the combustion synthesis process has been devel oped to study the ignition of a self-propagating combustion synthesis process in the Nb-C system. Compared with most of the previously publi shed theoretical work on this subject, this model provides a much more detailed description of the combustion synthesis process from a micro scale point of view, due to the fact that it takes into consideration the various microprocesses, such as the melting of reactants, the diff usion and mixing of reactants, and the formation of products. Differen t ignition modes, including constant-temperature ignition, constant-he at-flux ignition, and variable-temperature ignition, are considered in this work. The key parameters that influence the ignition process are also discussed.