Abstract
This study described a micro initiator realized by reactive Ni/Al nanolaminates. A self-propagating reaction can be triggered in the Ni/Al film by applying a DC voltage of 1.5 V. This exothermic reaction can raise the temperature of the film (10 μm in thickness) surface to as high as 622 K. The measured ignition power to start the self-propagating reaction in the film was 3 mW with an ignition delay of around 0.63 s. The small ignition energy required and the large energy output make the Ni/Al film superior to the current resistive heater based initiators. Numerical simulation results demonstrated that different temperatures can be achieved by simply alternating the film thickness and the localization of high temperature exposure was realized to avoid unintentional fire of adjacent initiators. These findings were confirmed by the experiment using thermal indicators.
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Acknowledgments
This work is supported by NASA Planetary Instrument Definition and Development Program under grant NASA NNX10AL25G and is partially supported by NASA EPSCoR NNX09AP72A. Xiaotun Qiu is supported by ASU Dissertation Fellowship. Ranran Liu is supported by LSU EDA scholarship.
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Qiu, X., Tang, R., Liu, R. et al. A micro initiator realized by reactive Ni/Al nanolaminates. J Mater Sci: Mater Electron 23, 2140–2144 (2012). https://doi.org/10.1007/s10854-012-0726-5
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DOI: https://doi.org/10.1007/s10854-012-0726-5