Aluminium ignition

Мержанов, А. Г.; Grigorjev, Yu.M.; Gal'chenko, Yu. A.

doi:10.1016/0010-2180(77)90088-8

Cited by 85 publications

(33 citation statements)

References 4 publications

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Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

“…The ignition and combustion of micron-sized Al particles are relatively well understood [120][121][122]. Micronsized Al particles have a higher ignition temperature (~ 2350 K) [120] and a tendency to agglomerate in solid rocket motor (SRM) environments [123]. In the recent past, nano-scale materials and composites, characterized by ultra fine grain sizes, have been recognized for their unusual energetic properties such as increased catalytic activity and higher reactivity [124].…”

Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

“…For micron-sized Al particles, a detached diffusion flame is observed and combustion is found to be similar to the hydrocarbon droplet combustion (d 2 -law) with a reduced exponent [130]. The ignition of micron-sized Al particles is observed to happen close to 2350 K and is reported to be caused by the melting of the impervious oxide shell [120]. The combustion of micron-sized Al particle is well explained by Dreizin et al's three-stage theory [131] and is described by unique features such as brightness oscillations, disruptive burning, droplet burning speed variations, oxygen build-up within the molten particle, micro-explosions, and asymmetric burning.…”

Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

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Nano Engineered Energetic Materials (NEEM)

Dlott¹,

Eden²,

Girolami³

et al. 2011

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. The ARO Nano Engineered Energetic Materials (NEEM) MURI program has been exploring new methodologies for developing energetic material formulations with control of all constituents over a wide range of length scales from 1 nm to 1 mm and larger and employing the latest techniques in molecular self-assembly and supramolecular chemistry for synthesizing and assembling NEEMs. The synthetic efforts have been guided by theoretical calculations and dynamic performance testing methodologies that also operate on all length scales. This final report ABSTRACTThe ARO Nano Engineered Energetic Materials (NEEM) MURI program has been exploring new methodologies for developing energetic material formulations with control of all constituents over a wide range of length scales from 1 nm to 1 mm and larger and employing the latest techniques in molecular self-assembly and supramolecular chemistry for synthesizing and assembling NEEMs. The synthetic efforts have been guided by theoretical calculations and dynamic performance testing methodologies that also operate on all length scales. This final report provides a summary of the accomplishments. In particular, new methods to generate metal nanoclusters were developed that are stabilized against environmental degradation while preserving their high energy content. Rapid expansion supercritical solution processes were developed and applied to synthesize nanosized particulate oxidizers and energetic oxidizer shell/fuel core composites. Surface science and experimental chemistry methods were applied to study the structures and energy releasing reaction pathways of NEEMs. Unique diagnostic capabilities were developed and applied to study the fundamental mechanisms that underlie NEEM dynamic performance. Combustion mechanisms of various NEEMs, including nanothermites and nanoparticulate fuel/liquid oxidizer systems, were experimentally analyzed. The reactive and thermal characteristics of NEEMs were studied using large (billion atoms) multiscale simulations that couple quantum-mechanical calculations to molecular dynamics calculations. In particular, the stability, structure and energetics of metallic nanoparticles with a special focus on the relationships between particle size, shape and excess surface free energy were studied. A unified theory of ignition and combustion of aluminum particles for a wide range of sizes, from nano to meso scales was established. . 12, 777-787 (2010 (b) Papers published in non-peer-reviewed journals or in conference proceedings (N/A for none)18.00 Number of Papers published in peer-reviewed journals:Number of Papers published in non peer-reviewed journals:1. USC group, "Multibillion-atom simulations of nano-mechano-chemistry on petaflops computers," First

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Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

Section: Ii27 Multi-scale Modeling Of Nano-aluminum Particle Ignitimentioning

confidence: 99%

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Nano Engineered Energetic Materials (NEEM)

Dlott¹,

Eden²,

Girolami³

et al. 2011

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“…Although there is a strong thermodynamic driving force for the reaction between aluminum and oxidizers, they can't contact directly because of the alumina oxide shell outside each particle [12]. Several literatures [13,14] show an idea that the ignition temperature of aluminum particles is in the vicinity of Al 2 O 3 melting point (2054℃), however, some others prove that the ignition temperature range of different micron-sized aluminum powders is from 650℃ to 2000℃ [13,[15][16][17][18]. Therefore, the oxidation mechanism of micron-sized aluminum particles in CO 2 is not that clear.…”

Section: Introductionmentioning

confidence: 99%

Oxidation mechanism of micron-sized aluminum particles in Al-CO₂ gradually heating system

Liu

Ren

Jiao

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Generally, employment of the quickly releasing chemical heat instead of external heating is a promising approach for modern technologies [1]. High temperature gradients observed during the synthesis in solid phase and high rate of the synthesis obstruct the natural experiment with thin physical effects.…”

Section: Introductionmentioning

confidence: 99%

The influence of the layer sizes on the conversion regimes realizing at layered composite synthesis

Aligozhina¹,

Knyazeva²

2014

AIP Conference Proceedings

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Abstract. The composite materials with different structure find a variety of applications. However, the peculiarities of the propagation of chemical reactions between structural elements during composite material synthesis are poorly studied. This paper suggests a model describing the conjugation of structure composite elements using a solid phase reaction at the ignition from a free surface. It was established that depending on the relation between layer sizes, various conversion regimes between inert materials are observed. The regimes differ in temperature values in the reaction zone, heterogeneities of temperature field and reaction zone thickness. Relation between thermophysical properties and thicknesses of layers can both promote reaction and retard it.

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Aluminium ignition

Cited by 85 publications

References 4 publications

Nano Engineered Energetic Materials (NEEM)

Nano Engineered Energetic Materials (NEEM)

Oxidation mechanism of micron-sized aluminum particles in Al-CO₂ gradually heating system

The influence of the layer sizes on the conversion regimes realizing at layered composite synthesis

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Aluminium ignition

Cited by 85 publications

References 4 publications

Nano Engineered Energetic Materials (NEEM)

Nano Engineered Energetic Materials (NEEM)

Oxidation mechanism of micron-sized aluminum particles in Al-CO2 gradually heating system

The influence of the layer sizes on the conversion regimes realizing at layered composite synthesis

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Product

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Oxidation mechanism of micron-sized aluminum particles in Al-CO₂ gradually heating system