Pressure-Thresholded Response in Cylindrically Shocked Cyclotrimethylene Trinitramine (RDX)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Univ. of California, Riverside, CA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Chicago, IL (United States)
We demonstrate a strongly thresholded response in cyclotrimethylene trinitramine (RDX) when it is cylindrically shocked using a novel waveguide geometry. Using ultrafast single-shot multi-frame imaging, we demonstrate that <100 μm diameter single crystals of RDX embedded in a polymer host deform along preferential planes for >100 ns after the shock first arrives in the crystal. We use in situ imaging and time-resolved photoemission to demonstrate that short-lived chemistry occurs with complex deformation pathways. Using scanning electron microscopy and ultra-small-angle X-ray scattering, we demonstrate that the shock-induced dynamics leave behind porous crystals, with pore shapes and sizes that change significantly with shock pressure. A threshold pressure of ~12 GPa at the center of convergence separated the single-mode planar crystal deformations from the chemistry-coupled multi-plane dynamics at higher pressures. Our observations indicate preferential directions for deformation in our cylindrically shocked system, despite the applied stress along many different crystallographic planes.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); US Office of Naval Research (ONR); USDOE Office of Science (SC), Office of Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- AC52-07NA27344; N00014-15-1-2879; AC02-06CH11357; NSF/CHE-1834750; N00014-16-1-2090
- OSTI ID:
- 1643753
- Alternate ID(s):
- OSTI ID: 1761516
- Report Number(s):
- LLNL-JRNL-756001; 943246
- Journal Information:
- Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Vol. 124, Issue 17; ISSN 1089-5639
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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