Laser ignition of nano-composite energetic loose powders

Shawn C. Stacy; Michelle L. Pantoya

doi:10.1002/prep.201200157

Laser ignition of nano-composite energetic loose powders

Shawn C. Stacy, Michelle L. Pantoya

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Laser ignition experiments were conducted to better understand parameters that influence ignition of energetic materials. A Nd:YAG laser (10ms, 1.5J, 3mm 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 (I₂O₅), polytetrafluoroethylene (C₂F₄), molybdenum trioxide (MoO₃) or iron oxide (Fe₂O₃)). 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.

Original language	English
Pages (from-to)	441-447
Number of pages	7
Journal	Propellants, Explosives, Pyrotechnics
Volume	38
Issue number	3
DOIs	https://doi.org/10.1002/prep.201200157
State	Published - Jun 2013

Keywords

Aluminum combustion
Ignition mechanisms
Percolation threshold
Powder composite energetic materials
Thermite

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10.1002/prep.201200157

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abstract = "Laser ignition experiments were conducted to better understand parameters that influence ignition of energetic materials. A Nd:YAG laser (10ms, 1.5J, 3mm 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 (I2O5), polytetrafluoroethylene (C2F4), molybdenum trioxide (MoO3) or iron oxide (Fe2O3)). 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.",

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AB - Laser ignition experiments were conducted to better understand parameters that influence ignition of energetic materials. A Nd:YAG laser (10ms, 1.5J, 3mm 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 (I2O5), polytetrafluoroethylene (C2F4), molybdenum trioxide (MoO3) or iron oxide (Fe2O3)). 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.

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KW - Ignition mechanisms

KW - Percolation threshold

KW - Powder composite energetic materials

KW - Thermite

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Laser ignition of nano-composite energetic loose powders

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