Abstract :
In the previous study, the influences of micropyretic
parameters on the ignition energy for lower exothermic
heat and lower activation energy of stable Ni–Al
reaction have been studied. In this study, we studied the
effect of ignition energy on the unstable Ti + 2B micropyretic
reaction, which has higher exothermic heat and
higher activation energy. Three-dimensional maps are generated
to illustrate the influences of micropyretic synthesis
parameters on the required ignition energy. In addition, the
comparisons in the ignition energy for the micropyretic
reactions with Ni + Al and Ti + 2B are studied. The
numerical calculation indicates that the changes in the ignition
energy caused by the thermal conductivity for the
micropyretic reaction with Ti + 2B is smaller as compared
with for the micropyretic reaction with Ni + Al. However,
the required ignition power is found to significantly change
with the thermal conductivity for the NiAl micropyretic
reaction when a higher pre-exponential factor is taken in
the calculation. In addition, the difference in the required
ignition energy caused by the thermal conductivity is noted
to be larger for the Ni–Al micropyretic reaction with a
lower pre-exponential factor
