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Shear Initiation of Al/MoO 3 ‐Based Reactive Materials
Author(s) -
Bouma Richard H. B.,
Meuken Denise,
Verbeek Ries,
Martinez Pacheco Maria,
Katgerman Laurens
Publication year - 2007
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200700051
Subject(s) - materials science , projectile , reactive material , aluminium , composite material , molybdenum trioxide , particle size , shear (geology) , porosity , molybdenum , pressing , metallurgy , chemical engineering , engineering
Reactive mixtures based on nano aluminium and nano‐ or micron size molybdenum trioxide have been pressed. These energetic mixtures have been tested in the Ballistic Impact Chamber and as an energetic projectile impacting a steel plate. Al/MoO 3 ‐based reactive mixtures can be initiated by a controlled mechanical stimulus. The sensitivity depends on deformation velocity, pressing density, addition of fluorine containing binder and particle size. Nanometric mixtures of Al and MoO 3 have a shorter time to reaction compared to the corresponding mixtures with micron size MoO 3 . The sensitivity decreases with increase in porosity. No influence of fuel/oxidizer ratio has been found in the experiments. An extensive deformation is needed before the start of reaction is observed. An analytical evaluation of shear rate cannot be applied as a detailed numerical simulation of the deformation process in PBXN‐109 shows.