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Journal of Thermal Analysis and Calorimetry

, Volume 96, Issue 3, pp 677–685 | Cite as

Processing and characterization of aluminum-based nanothermites

  • Jan A. Puszynski
Article

Abstract

During the past several years, a significant effort has been on investigation of reaction front propagation and the rate of energy release in heterogeneous systems consisting of nanopowder reactants. Substantial size reduction of each reactant powder (e.g. from micro- to nano-size) leads to increase of reaction front propagation in some systems under unconfined conditions by approximately two to three order of magnitude. This paper presents key challenges associated with processing and use of nanothermite materials and characterization of nanoreactants. Reaction constants, such as activation energies and frequency factors were determined using DSC technique for several nanothermite systems based on nanosize aluminum and iron oxide, bismuth trioxide, and molybdenum trioxide. Experimental data of ignition delay times for different nanothermite systems using laser energy source were compared well to those predicted by proposed mathematical model.

Keywords

Nanothermites Mixing Reaction kinetics Combustion Ignition 

Notes

Acknowledgements

The author gratefully acknowledges the financial support from DEPSCoR (Grant #W911NF-05-1-0310) and US Naval Surface Warfare Center, Indian Head, Contract #N00174-07-C-0013. The acknowledgment is also extended to Dr. Jacek Swiatkiewicz, Research Scientist III and PhD students: Lori Groven, Chris Bulian, Zac Doorenbos, and Alok Vats.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Department of Chemical and Biological EngineeringSouth Dakota School of Mines and TechnologyRapid City USA

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