Refractive Imaging of Air Shock Above Microscale Defects in Pentaerythritol Tetranitrate (PETN) Films

Peguero, Julio C.; Forrest, Eric C.; Knepper, Robert; Hargather, Michael J.; Tappan, Alexander S.; Marquez, Michael P.; Vasiliauskas, Jonathan G.; Rupper, Stephen G.

doi:10.1002/prep.202000029

Refractive Imaging of Air Shock Above Microscale Defects in Pentaerythritol Tetranitrate (PETN) Films

Journal Article · Wed Oct 14 00:00:00 EDT 2020 · Propellants, Explosives, Pyrotechnics

DOI:https://doi.org/10.1002/prep.202000029· OSTI ID:1721590

Peguero, Julio C. ^[1]; Forrest, Eric C. ^[2]; Knepper, Robert ^[2]; Hargather, Michael J. ^[3]; Tappan, Alexander S. ^[2]; Marquez, Michael P. ^[2]; Vasiliauskas, Jonathan G. ^[2]; Rupper, Stephen G. ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); New Mexico Inst. of Mining and Technology, Socorro, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

Physical vapor deposition (PVD) of high explosives can produce energetic samples with unique microstructure and morphology compared to traditional powder processing techniques, but challenges may exist in fabricating explosive films without defects. Deposition conditions and substrate material may promote microcracking and other defects in the explosive films. Here, we investigate effects of engineered microscale defects (gaps) on detonation propagation and failure for pentaerythritol tetranitrate (PETN) films using ultra-high-speed refractive imaging and hydrocode modelling. Observations of the air shock above the gap reveal significant instabilities during gap crossing and re-ignition.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; NA0003525

OSTI ID:: 1721590

Report Number(s):: SAND--2020-9109J; 690280

Journal Information:: Propellants, Explosives, Pyrotechnics, Journal Name: Propellants, Explosives, Pyrotechnics Journal Issue: 1 Vol. 46; ISSN 0721-3115

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
CTH
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Pentaerythritol Tetranitrate (PETN)
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Refractive Imaging of Air Shock Above Microscale Defects in Pentaerythritol Tetranitrate (PETN) Films

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