University of Illinois Urbana-Champaign

Shock Compression Induced Hot Spots In Energetic Material Detected By Thermal Imaging Microscopy

Chen, Ming-Wei

Content Files
TB10_Abstract.pdf
TB10_Abstract.txt
TB10_Presentation.pptx

Permalink

https://hdl.handle.net/2142/50834

Description

Title
Shock Compression Induced Hot Spots In Energetic Material Detected By Thermal Imaging Microscopy
Author(s)
Chen, Ming-Wei
Contributor(s)
Dlott, Dana
Issue Date
2014-06-17
Keyword(s)
Instrument/Technique Demonstration
Date of Ingest
  • 2014-09-17T16:55:06Z
  • 2015-04-14T18:40:25Z
Abstract
The chemical reaction of powder energetic material is of great interest in energy and pyrotechnic applications since the high reaction temperature. Under the shock compression, the chemical reaction appears in the sub-microsecond to microsecond time scale, and releases a large amount of energy. Experimental and theoretical research progresses have been made in the past decade, in order to characterize the process under the shock compression. However, the knowledge of energy release and temperature change of this procedure is still limited, due to the difficulties of detecting technologies. We have constructed a thermal imaging microscopy apparatus, and studied the temperature change in energetic materials under the long-wavelength infrared (LWIR) and ultrasound exposure.\footnote{M.-W. Chen, S. You, K. S. Suslick, and D. D. Dlott, {\textit{Rev. Sci. Instr.}, \underline{\textbf{85}}, 023705 (2014)},}\footnote{ M.-W. Chen, S. You, K. S. Suslick, and D. D. Dlott, {\textit{Appl. Phys. Lett.}, \underline{\textbf{104}}, 061907 (2014)}} Additionally, the real-time detection of the localized heating and energy concentration in composite material is capable with our thermal imaging microscopy apparatus. Recently, this apparatus is combined with our laser driven flyer plate system\footnote{K. E. Brown, W. L. Shaw, X. Zheng, and D. D. Dlott, {\textit{Rev. Sci. Instr.}, \underline{\textbf{83}}, 103901 (2012)}} to provide a lab-scale source of shock compression to energetic material. A fast temperature increase of thermite particulars induced by the shock compression is directly observed by thermal imaging with 15-20 $\mu$m spatial resolution. Temperature change during the shock loading is evaluated to be at the order of 10$^9$K$/$s, through the direct measurement of mid-wavelength infrared (MWIR) emission intensity change. We observe preliminary results to confirm the hot spots appear with shock compression on energetic crystals, and will discuss the data and analysis in further detail.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/50834
DOI
https://doi.org/10.15278/isms.2014.TB10
Copyright and License Information
Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

Owning Collections

Abstracts & Presentations - 2014 International Symposium on Molecular Spectroscopy PRIMARY