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Cover Picture: Laboratory‐scale Investigation of the Influence of Ageing on the Performance and Sensitivity of an Explosive Containing ϵ‐CL‐20 (Prop., Explos., Pyrotech. 6/2018)
Author(s) -
Gottfried Jennifer L.,
PesceRodriguez Rose A.,
Farrow Darcie,
Dellinger Jennifer
Publication year - 2018
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201880601
Subject(s) - explosive material , crystal (programming language) , materials science , nanosecond , laser , sensitivity (control systems) , composite number , solvent , composite material , ageing , cover (algebra) , analytical chemistry (journal) , optics , chemistry , chromatography , mechanical engineering , physics , organic chemistry , engineering , computer science , electronic engineering , biology , genetics , programming language
The cover picture shows a CL‐20 crystal (the primary component of the RSI‐007 energetic material composite explosive) with solvent inclusions before and after ageing at high temperatures (70 or 100 °C). The aged crystal with the ethyl acetate and chloroform solvents evaporated from the inclusions has voids, micro‐cracks, and hazing. These defects result in increased sensitivity (demonstrated by increased laser‐induced deflagration) and decreased performance (demonstrated by lower laser‐induced shockwave velocities) compared to the unaged baseline RSI‐007 when the energy release is measured using a focused, nanosecond‐pulsed laser. Details are discussed in the article by Jennifer Gottfried et al. on page 616 ff.