Detonation in shocked homogeneous high explosives

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We have studied shock-induced changes in homogeneous high explosives including nitromethane, tetranitromethane, and single crystals of pentaerythritol tetranitrate (PETN) by using fast time-resolved emission and Raman spectroscopy at a two-stage light-gas gun. The results reveal three distinct steps during which the homogeneous explosives chemically evolve to final detonation products. These are (1) the initiation of shock compressed high explosives after an induction period, (2) thermal explosion of shock-compressed and/or reacting materials, and (3) a decay to a steady-state representing a transition to the detonation of uncompressed high explosives. Based on a gray-body approximation, we have obtained the CJ temperatures: 3800 ... continued below

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12 p.

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Yoo, C.S.; Holmes, N.C. & Souers, P.C. November 1, 1995.

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Description

We have studied shock-induced changes in homogeneous high explosives including nitromethane, tetranitromethane, and single crystals of pentaerythritol tetranitrate (PETN) by using fast time-resolved emission and Raman spectroscopy at a two-stage light-gas gun. The results reveal three distinct steps during which the homogeneous explosives chemically evolve to final detonation products. These are (1) the initiation of shock compressed high explosives after an induction period, (2) thermal explosion of shock-compressed and/or reacting materials, and (3) a decay to a steady-state representing a transition to the detonation of uncompressed high explosives. Based on a gray-body approximation, we have obtained the CJ temperatures: 3800 K for nitromethane, 2950 K for tetranitromethane, and 4100 K for PETN. We compare the data with various thermochemical equilibrium calculations. In this paper we will also show a preliminary result of single-shot time-resolved Raman spectroscopy applied to shock-compressed nitromethane.

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12 p.

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OSTI as DE96007270

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  • Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 27 Nov - 1 Dec 1995

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  • Other: DE96007270
  • Report No.: UCRL-JC--121211
  • Report No.: CONF-951155--52
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 207590
  • Archival Resource Key: ark:/67531/metadc666497

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  • November 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 18, 2016, 12:28 p.m.

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Yoo, C.S.; Holmes, N.C. & Souers, P.C. Detonation in shocked homogeneous high explosives, article, November 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc666497/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.