Journal of Propulsion and Energy ISSN:2734-1887(Print) 2765-0049(Online) Free Open Access International Journal on Propulsion and Energy Science and Technology

A novel integration attempt of nanoscale bimetallic multilayers into microscale thin-film explosive initiator has been proposed to improve initiator ignition performance. In order to study the ignition behaviors of boron (B) and titanium (Ti) multilayers by RC initiation circuit and bridge ohmic heating, this investigation introduced a three-dimensional computational model that includes thermal and atomic species diffusion in B/Ti multilayers as well as electric potential analysis in thin-film initiator coupled with RC circuit equation. Computational results found significant three-dimensional effects by spatially non-uniform bridge ohmic heating and lateral bridge heat loss. B/Ti reaction ignition and propagation proceeds quite previous differently from one-dimensional approximation model. More realistic present model predicts longer delay of bimetallic reaction ignition and much higher electrical energy requirement, when compared to existing one-dimensional model.