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Characterization of Airborne Ultrafine and Nanometer Particles During Energetic Material Synthesis and Testing

Published online by Cambridge University Press:  01 February 2011

Meng-Dawn Cheng  and
Charles M. Jenkins
Meng-Dawn Cheng
Affiliation:
Oak Ridge National Laboratory/ESD, Building 1505, MS 6038, Oak Ridge, TN 37831
Charles M. Jenkins
Affiliation:
Air Force Research Laboratory, Munitions Directorate/HERD, Eglin AFB, FL 32542
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Abstract

Several experiments were conducted to improve our understanding of the properties of aerosol particles generated by detonation of conventional explosive and explosives prepared from nanophase materials. Initial number concentrations (∼ 106−107 cm−3) of particles produced by detonations of the nano-explosives were comparable to that produced by conventional explosive. In general, data taken by a time-of-flight aerodynamic sizer and a scanning differential mobility analyzer for the first sample indicate a multi-modal distribution that there were a peak between 0.7 and 0.9 μm, and one and/or two peaks smaller than 100 nm depending upon the explosive used. The material properties and formulation of the explosive appear to play a significant role in the enhanced particle growth and increased deposition velocity leading to a higher reduction rate of total particle concentrations. Furthermore, the high level of ultrafine particles and nanoparticles in addition to the enriched toxic metals, the biological properties (e.g., the cellular toxicity) of the detonation particles need to be investigated in the near future.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 800: Symposium AA – Synthesis, Characterization, and Properties of Energetic/Reactive Nanomaterials , 2003 , AA1.5
Copyright
Copyright © Materials Research Society 2004

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References

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