Abstract :
Micropyretic synthesis is a technique whereby
a material is synthesized by the propagation of a
combustion front across a powder. Composition variations
in reactants and diluent are common during
micropyretic synthesis when powders are mixed and the
conventional modeling treatments thus far have only
considered uniform systems. Composition variations
are thought to result in the local variations of such
thermophysical/chemical parameters for the reactant as
density, heat capacity, and thermal conductivity; the
result is changes in the combustion temperature,
propagation velocity, and propagation pattern of a
combustion front. This study investigates the impact of
composition variations during micropyretic synthesis
with Ni + Al. Correlations of variations in the reactants
and diluent with the propagation velocity and combustion
temperature are both studied by a numerical
simulation.
