Abstract
Nano-aluminium particles are produced using the electric wire explosion process in an inert atmosphere at our institute. This paper reports the characterization of nanoaluminium particles in combination with other solid propellant ingredients for their thermal and combustion behaviour. High-heating-rate hot-stage microscopic experiments are performed with different mixtures of propellant ingredients. The effects of addition of nano-aluminium versus micron-sized aluminium in the middle lamina of sandwiches are analyzed for burning rates and by means of scanning electron microscope and transmission electron microscope micrographs of quench-collected aluminium agglomerates. Nano-aluminized sandwiches with thinner middle lamina show slightly higher burning rates than micron-sized aluminized ones. The quenched surface of nano-aluminized sandwiches shows relatively smaller aluminium agglomerates than with micron-sized aluminium. The resultant particle sizes of nano-aluminium agglomerates is in the range of 1–5 µm, which indicates a higher rate of agglomeration than with micro-aluminium, but these sizes are small relative to the agglomerates of the latter. This is also confirmed by quench-collected agglomerates of nano-aluminium emerging from the burning surface of a composite propellant.
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Translated from Fizika Goreniya i Vzryva, Vol. 46, No. 1, pp. 26–35, January–February, 2010.
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Jayaraman, K., Chakravarthy, S.R. & Sarathi, R. Accumulation of nano-aluminium during combustion of composite solid propellant mixtures. Combust Explos Shock Waves 46, 21–29 (2010). https://doi.org/10.1007/s10573-010-0004-x
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DOI: https://doi.org/10.1007/s10573-010-0004-x