Get Al-based Energetic Nano Materials: Design, Manufacturing, PDF

By Carole Rossi

ISBN-10: 184821717X

ISBN-13: 9781848217171

Over the earlier twenty years, the quick improvement of nanochemistry and nanotechnology has allowed the synthesis of assorted fabrics and oxides within the type of nanopowders making it attainable to provide new full of life compositions and nanomaterials.

This booklet has a bottom-up constitution, from nanomaterials synthesis to the appliance fields. ranging from aluminum nanoparticles synthesis for gas program, it proposes a close state-of-the artwork of the several equipment of training of aluminum-based reactive nanomaterials. It describes the strategies constructed for his or her characterization and, whilst on hand, an outline of the elemental mechanisms chargeable for their ignition and combustion. This publication additionally offers the probabilities and obstacles of alternative lively nanomaterials and similar constructions in addition to the research in their chemical and thermal homes. the complete is rounded off with a glance on the performances of reactive fabrics by way of warmth of response and reactivity mostly characterised because the self-sustained combustion pace. The e-book finally ends up with an outline of present reactive nanomaterials purposes underlying the promising integration of aluminum-based reactive nanomaterial into micro electromechanical systems.

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Extra info for Al-based Energetic Nano Materials: Design, Manufacturing, Properties and Applications

Example text

The overall oxidation can be written as [FED 03]. 3] is the thickness of the oxide film, t is time, is the oxidizer where concentration proportional to the oxidizing pressure near the particle surface 20 Al-Based Energetic Nanomaterials and m is the order of the reaction in terms of the oxidizer. R is the universal gas constant, and E and K are the activation energy and pre-exponent, respectively. The exponent determines the dependence of the oxidation rate on the oxide film thickness. 0 for linear oxidation law (suitable for the first oxidation step) and 1 for parabolic law of oxidation when diffusion of oxidizing species through the oxide already formed is the limiting step for the oxidation kinetics.

286 nm) 2 Applications: Al Nanoparticles in Gelled Propellants and Solid Fuels One application of Al nanopowders concerns their incorporation into propellants, explosives and pyrotechnics to promote combustion, and, more specifically, to increase the burning rate. Propellant burning rate is in direct relation with the system pressure. 1] and β are empirical and adjustable constants. 1. Gelled propellants Much of the experimental and theoretical research on metalized gelled propellants began in the 1950s and 1960s with the study of slurry fuels considering various metals for aerospace applications [PAL 98].

The millisecond ignition delays could have been described theoretically by modeling the heat transfer processes of the pellet heated by the laser; however, such a description requires the value of the bulk thermal conductivity of the pellet, which is very difficult to either predict or measure. This difficulty is common for all nanothermite mixtures. 12, burning rates increase as the particle size increases with particle size except in the cases where the Al2O3 content exceeded 50% (for A1 diameter <50 nm).

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Al-based Energetic Nano Materials: Design, Manufacturing, Properties and Applications by Carole Rossi

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