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Laser Ignition of Nano‐Composite Energetic Loose Powders
Author(s) -
Stacy Shawn C.,
Pantoya Michelle L.
Publication year - 2013
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.201200157
Subject(s) - laser ignition , materials science , molybdenum trioxide , ignition system , laser , thermite , copper , stoichiometry , composite material , analytical chemistry (journal) , aluminium , molybdenum , optics , metallurgy , thermodynamics , chemistry , physics , chromatography , organic chemistry
Abstract Laser ignition experiments were conducted to better understand parameters that influence ignition of energetic materials. A Nd:YAG laser (10 ms, 1.5 J, 3 mm spot diameter) was used to heat the top surface of an energetic powder composed of nanometric aluminum (Al) combined stoichiometrically with an oxidizer (copper oxide (CuO), iodine pentoxide (I 2 O 5 ), polytetrafluoroethylene (C 2 F 4 ), molybdenum trioxide (MoO 3 ) or iron oxide (Fe 2 O 3 )). Ignition delay time was calculated as the difference between first light of the laser’s flash lamp and the energetic material. Results show that laser energy required for ignition is dependent on pre‐ignition reactions, phase change/decomposition temperatures, confinement, and laser absorbance.