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Microwave-Induced Heating of HMX for Decomposition Kinetic Analysis

Published online by Cambridge University Press:  20 January 2012

Amanda L. Duque  and
W. Lee Perry
Amanda L. Duque
Affiliation:
Weapons Experiments Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
W. Lee Perry
Affiliation:
Weapons Experiments Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
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Abstract

We use microwave (MW) absorption to induce rapid, uniform heating of the secondary high explosive octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) for decomposition analysis in a fast kinetic regime (10-2 s). Because HMX alone is MW inactive, composites comprised of an HMX-polymeric binder system doped with a small mass fraction (<1 wt%) multiwalled carbon nanotubes or graphite, were fabricated. The dielectric properties were measured (real and imaginary permittivity between 1 – 18 GHz), which is necessary for describing the expected MW-materials interaction and predicted heating response. The real component of the relative dielectric permittivity ranged from 3 – 4 while the imaginary component was 0.01 – 0.07, depending on the amount of carbon dopant added. Dynamic temperature measurements of a similar explosive composite under MW exposure were accomplished using fiber-optic temperature measurement techniques, and can be reproducibly correlated to the amount of MW energy absorbed in the sample.

Keywords

microwave heatingenergetic materialkinetics
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1405: Symposium Y – Advances in Energetic Materials Research , 2012 , mrsf11-1405-y06-05
Copyright
Copyright © Materials Research Society 2012

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References

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