Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-04T19:43:45.819Z Has data issue: false hasContentIssue false
  • English
  • Français

Nano-structured Aluminum Powders with Modified Protective Surface Layers

Published online by Cambridge University Press:  07 February 2013

Shasha Zhang ,
Mirko Schoenitz  and
Edward L. Dreizin
Shasha Zhang
Affiliation:
Otto H. York Dept. of Chemical, Biological and Pharmaceutical Engineering, University Heights, Newark, NJ 07102,
Mirko Schoenitz
Affiliation:
Otto H. York Dept. of Chemical, Biological and Pharmaceutical Engineering, University Heights, Newark, NJ 07102,
Edward L. Dreizin
Affiliation:
Otto H. York Dept. of Chemical, Biological and Pharmaceutical Engineering, University Heights, Newark, NJ 07102,
Get access

Abstract

The advantage of aluminum powder as a fuel additive in energetic formulation includes its high volumetric combustion enthalpy and relatively low cost. However, the thermodynamically predicted benefits of aluminum combustion are rarely achieved because of extended ignition delays associated with heterogeneous reactions occurring at the alumina surface which surrounds the aluminum particle. In order to fully exploit aluminum’s high reaction energy, this effort focuses on adjusting its combustion dynamics by modifying its surface and structure. The modification is achieved by cryo-milling aluminum with cyclooctane, which is liquid at room temperature, but solid when cooled by liquid nitrogen. The prepared materials consist of micron-sized, equiaxial, mostly Al particles with a small amount of cyclooctane. Aluminum surface in the prepared sample is coated with a cyclooctane-modified layer with properties significantly different from those of regular alumina. Its oxidation kinetics, as observed from thermo-analytical measurements, is different from that of pure aluminum. The powder ignites at substantially reduced temperatures, produces shorter ignition delays, and higher aerosol burn rates compared to a regular spherical Al powder with similar particle sizes.

Keywords

Alcryomillingoxidation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1521: Symposium OO – Properties, Processing and Applications of Reactive Materials , 2013 , mrsf12-1521-oo05-05
Copyright
Copyright © Materials Research Society 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Yetter, R.A., Risha, G.A., and Son, S.F., Proceedings of the Combustion Institute, 32 II, pp. 1819–1838 (2009)10.1016/j.proci.2008.08.013CrossRefGoogle Scholar
Jouet, R. J., et al. ., Chemistry of Materials, 17, pp.2987–2996 (2005)10.1021/cm048264yCrossRefGoogle Scholar
Lewis, W. K., et al. ., The Journal of Physical Chemistry C, 114, pp. 6377–6380 (2010)10.1021/jp100274jCrossRefGoogle Scholar
Dreizin, E.L., Progress in Energy and Combustion Science. 35, pp. 141–167 (2009)10.1016/j.pecs.2008.09.001CrossRefGoogle Scholar
Zhang, S., Schoenitz, M., and Dreizin, E.L., International Journal of Energetic Materials and Chemical Propulsion, in press (2012)Google Scholar
Zhang, S., Schoenitz, M., and Dreizin, E.L., Journal of Physics and Chemistry of Solids, 71, pp. 1213–1220 (2010)10.1016/j.jpcs.2010.04.018CrossRefGoogle Scholar
Zhang, S., Schoenitz, M., and Dreizin, E.L., Journal of Physical Chemistry C, 114 (46), pp. 19653–19659 (2010)10.1021/jp108171kCrossRefGoogle Scholar
Zhang, S., et al. .,Combustion and Flame, 159 (5), pp. 1980–1986 (2012)10.1016/j.combustflame.2012.01.004CrossRefGoogle Scholar
Stamatis, D., et al. ., Combustion Science and Technology, 181 (1), pp. 97–116. (2009)10.1080/00102200802363294CrossRefGoogle Scholar
Gill, R.J., Badiola, C., and Dreizin, E.L., Combustion and Flame, 157 (11), pp. 2015–2023 (2010)10.1016/j.combustflame.2010.02.023CrossRefGoogle Scholar
Badiola, C., Gill, R.J., and Dreizin, E.L., Combustion and Flame, 158, pp. 2064–2070 (2011)10.1016/j.combustflame.2011.03.007CrossRefGoogle Scholar
Trunov, M.A., et al. ., Combustion and Flame, 140(4), pp. 310–318 (2005)10.1016/j.combustflame.2004.10.010CrossRefGoogle Scholar