Reaction tuning of selectively deposited nano-thermite inks for thrust and heat deposition

Currently there is very little systematic work that quantifies the performance of energetic materials in terms of thrust or heat deposition applied to electronic circuits. A better understanding of the interactions between nano-scale energetic materials and electronic systems, as a function of stoichiometry is needed for enhanced defeat. Both of these needs are addressed in this research. Formulations of Al-CuO and Al-Bi2O3 nano-thermites were prepared at different equivalence ratios and selectively deposited onto silicon substrates and thrust and heat deposition of these materials was quantified. Both nano-thermite systems produced maximum thrust near stoichiometric ratios, and more fuel-rich mixtures led to significant decreases in thrust. In contrast, fuel-rich formulations of both nano-thermite systems resulted in increased heat deposition due to less gas production, which removed hot products from substrate surfaces, and lower heat deposition was observed near stoichiometric ratios. The heat transfer from the Al-CuO system increased more than the Al-Bi2O3 system at fuel rich conditions. The developed methodology can be used to characterize and optimize other materials for possible integration into electronic devices