Refractive Imaging of Air Shock Above Microscale Defects in Pentaerythritol Tetranitrate (PETN) Films
Journal Article
·
· Propellants, Explosives, Pyrotechnics
- 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 Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1721590
- Report Number(s):
- SAND-2020-9109J; 690280
- Journal Information:
- Propellants, Explosives, Pyrotechnics, Vol. 46, Issue 1; ISSN 0721-3115
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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