Tuning the Oxygen Balance of Energetic Composites: Crystallization of ADN/Secondary Explosives Mixtures by Spray Flash Evaporation

New energetic composites with enhanced reactive performances while allowing the safe handling according to their sensitivity thresholds are presented. This paper combines different approaches: the intimate contact between the compounds, the particle size reduction and the processing of composite mat...

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Bibliographic Details
Published in:Propellants, explosives, pyrotechnics explosives, pyrotechnics, 2021-03, Vol.46 (3), p.398-412
Main Authors: Lobry, Emeline, Berthe, Jean‐Edouard, Hübner, Jakob, Schnell, Fabien, Spitzer, Denis
Format: Article
Language:English
Subjects:
Chemical Sciences
Comminution
Composite materials
Composites
Confocal Raman spectroscopy
Crystallization
Energetic materials
Evaporation
Explosives
HMX
Material chemistry
Morphology
Oxidizing agents
Shells (structural forms)
Spray flash evaporation
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Summary:New energetic composites with enhanced reactive performances while allowing the safe handling according to their sensitivity thresholds are presented. This paper combines different approaches: the intimate contact between the compounds, the particle size reduction and the processing of composite materials to maintain the oxygen balance close to zero. The Spray Flash Evaporation process enables the fast crystallization at the submicron scale by combining an oxidizer, ammonium dinitramide ADN and two secondary explosives (RDX and HMX). The morphologies of the particles were analyzed and compared with slow evaporation tests. An intimate mixing between the two components (crystallized by SFE) is highlighted and core‐shell structure is evidenced by advanced techniques such as 2D and 3D confocal Raman microscopy. The composites offer outstanding energetic performances compared to sole explosives. It paves the way to new energetic compositions based on current materials.
ISSN:0721-3115
1521-4087
DOI:10.1002/prep.202000090