Explosively driven low-density foams and powders
Abstract
Hollow RX-08HD cylindrical charges were loaded with boron and PTFE, in the form of low-bulk density powders or powders dispersed in a rigid foam matrix. Each charge was initiated by a Comp B booster at one end, producing a detonation wave propagating down the length of the cylinder, crushing the foam or bulk powder and collapsing the void spaces. The PdV work done in crushing the material heated it to high temperatures, expelling it in a high velocity fluid jet. In the case of boron particles supported in foam, framing camera photos, temperature measurements, and aluminum witness plates suggest that the boron was completely vaporized by the crush wave and that the boron vapor turbulently mixed with and burned in the surrounding air. In the case of PTFE powder, X-ray photoelectron spectroscopy of residues recovered from fragments of a granite target slab suggest that heating was sufficient to dissociate the PTFE to carbon vapor and molecular fluorine which reacted with the quartz and aluminum silicates in the granite to form aluminum oxide and mineral fluoride compounds.
- Inventors:
-
- Orinda, CA
- Simi Valley, CA
- Livermore, CA
- Danville, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 985231
- Patent Number(s):
- 7707819
- Application Number:
- 10/947,815
- Assignee:
- Lawrence Livermore National Security, LLC (Livermore, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C06 - EXPLOSIVES C06B - EXPLOSIVES OR THERMIC COMPOSITIONS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Viecelli, James A, Wood, Lowell L, Ishikawa, Muriel Y, Nuckolls, John H, and Pagoria, Phillip F. Explosively driven low-density foams and powders. United States: N. p., 2010.
Web.
Viecelli, James A, Wood, Lowell L, Ishikawa, Muriel Y, Nuckolls, John H, & Pagoria, Phillip F. Explosively driven low-density foams and powders. United States.
Viecelli, James A, Wood, Lowell L, Ishikawa, Muriel Y, Nuckolls, John H, and Pagoria, Phillip F. Tue .
"Explosively driven low-density foams and powders". United States. https://www.osti.gov/servlets/purl/985231.
@article{osti_985231,
title = {Explosively driven low-density foams and powders},
author = {Viecelli, James A and Wood, Lowell L and Ishikawa, Muriel Y and Nuckolls, John H and Pagoria, Phillip F},
abstractNote = {Hollow RX-08HD cylindrical charges were loaded with boron and PTFE, in the form of low-bulk density powders or powders dispersed in a rigid foam matrix. Each charge was initiated by a Comp B booster at one end, producing a detonation wave propagating down the length of the cylinder, crushing the foam or bulk powder and collapsing the void spaces. The PdV work done in crushing the material heated it to high temperatures, expelling it in a high velocity fluid jet. In the case of boron particles supported in foam, framing camera photos, temperature measurements, and aluminum witness plates suggest that the boron was completely vaporized by the crush wave and that the boron vapor turbulently mixed with and burned in the surrounding air. In the case of PTFE powder, X-ray photoelectron spectroscopy of residues recovered from fragments of a granite target slab suggest that heating was sufficient to dissociate the PTFE to carbon vapor and molecular fluorine which reacted with the quartz and aluminum silicates in the granite to form aluminum oxide and mineral fluoride compounds.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 04 00:00:00 EDT 2010},
month = {Tue May 04 00:00:00 EDT 2010}
}