The burning rate of energetic films of nanostructured porous silicon |
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Authors: | Plummer Andrew Kuznetsov Valerian Joyner Timothy Shapter Joe Voelcker Nicolas H |
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Affiliation: | School of Chemical and Physical Sciences, Centre for Expertise in Energetic Materials, Flinders University, Sturt Road, Bedford Park, Adelaide 5042, Australia. |
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Abstract: | A systematic study of nanoenergetic films consisting of nanostructured porous silicon impregnated with sodium perchlorate is carried out. The explosive properties of these films are investigated as a function of thickness, porosity, and confinement. The films' burning rates are investigated using fiber-optic velocity probes, demonstrating that flame-front velocities vary between approximately 1 and 500 m s(-1) and are very sensitive to the films' structural characteristics. Analysis of the flame profile by high-speed video is also presented, suggesting that the reaction type is a deflagration rather than a detonation. A strong plume of flame is emitted from the surface, indicating the potential for this material to perform useful work either as an initiator or as a propellant. The shape of the flame front transitioned from an inverted V at thin-film thicknesses to a neat square-shaped front once the material became self-confining at 50 μm. |
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Keywords: | porous silicon nanostructured explosives energetic materials sodium perchlorate burning rates |
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