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Title: Measurement of carbon condensates using small-angle x-ray scattering during detonation of the high explosive hexanitrostilbene

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4922866· OSTI ID:1258290

In this study, the dynamics of carbon condensation in detonating high explosives remains controversial. Detonation model validation requires data for processes occurring at nanometer length scales on time scales ranging from nanoseconds to microseconds. A new detonation end station has been commissioned to acquire and provide time-resolved small-angle x-ray scattering (SAXS) from detonating explosives. Hexanitrostilbene (HNS) was selected as the first to investigate due to its ease of initiation using exploding foils and flyers, vacuum compatibility, high thermal stability, and stoichiometric carbon abundance that produces high carbon condensate yields. The SAXS data during detonation, collected with 300 ns time resolution, provide unprecedented signal fidelity over a broad q-range. This fidelity permits the first analysis of both the Guinier and Porod/power-law regions of the scattering profile during detonation, which contains information about the size and morphology of the resultant carbon condensate nanoparticles. To bolster confidence in these data, the scattering angle and intensity were additionally cross-referenced with a separate, highly calibrated SAXS beamline. The data show that HNS produces carbon particles with a radius of gyration of 2.7 nm in less than 400 ns after the detonation front has passed, and this size and morphology are constant over the next several microseconds. These data directly contradict previous pioneering work on RDX/TNT mixtures and TATB, where observations indicate significant particle growth (50% or more) continues over several microseconds. The power-law slope is about -3, which is consistent with a complex disordered, irregular, or folded sp2 sub-arrangement within a relatively monodisperse structure possessing radius of gyration of 2.7 nm after the detonation of HNS.

Research Organization:
Washington State Univ., Pullman, WA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002442; AC02-06CH11357; AC52-07NA27344; LLNL-LDRD-14-ERD-018
OSTI ID:
1258290
Alternate ID(s):
OSTI ID: 1228646
Journal Information:
Journal of Applied Physics, Vol. 117, Issue 24; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Cited By (9)

Detonation synthesis of carbon nano-onions via liquid carbon condensation journal August 2019
Ultrafast shock synthesis of nanocarbon from a liquid precursor journal January 2020
New developments of the CARTE thermochemical code: A two-phase equation of state for nanocarbons journal January 2016
Understanding the shock and detonation response of high explosives at the continuum and meso scales journal March 2018
In situ insights into shock-driven reactive flow
  • Dattelbaum, Dana M.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2017: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.5044769
conference January 2018
An energetic derivative of 2,2′,4,4′,6,6′-hexanitrostilbene (HNS) and its DMF solvate crystallized from HNS solution with tertiary amine additives text January 2018
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
An energetic derivative of 2,2′,4,4′,6,6′-hexanitrostilbene (HNS) and its DMF solvate crystallized from HNS solution with tertiary amine additives text January 2018
Nanocarbon condensation in detonation journal February 2017