Combustion of Nanoscale Al/MoO3 Thermite in Microchannels

Son, Steven F.; Asay, B. W.; Foley, Timothy J.; Yetter, Richard A.; Wu, Mei‐Feng; Risha, Grant A.

doi:10.2514/1.26090

Cited by 164 publications

(90 citation statements)

References 25 publications

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“…[ [4][5][6][7][8][9] These investigations established unambiguously that thermitenanocomposite ignition and combustion properties can be affected by varying the size of the constituents and their intimacy. [4,5,[7][8][9][10][11][12][13][14][15][16] For instance, decreasing the size of the nanoparticles enhances the combustion rate and lowers the ignition temperature.…”

Section: Introductionmentioning

confidence: 84%

High‐Energy Al/CuO Nanocomposites Obtained by DNA‐Directed Assembly

Séverac

Alphonse

Estève

et al. 2011

Adv Funct Materials

152

108

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Over the next few years, it is expected that new, energetic, multifunctional materials will be engineered. There is a need for new methods to assemble such materials from manufactured nanopowders. In this article, we demonstrate a DNA-directed assembly procedure to produce highly energetic nanocomposites by assembling Al and CuO nanoparticles into micrometersized particles of an Al/CuO nanocomposite, which has exquisite energetic performance in comparison with its physically mixed Al/CuO counterparts. Using 80 nm Al nanoparticles, the heat of reaction and the onset temperature are 1.8 kJ g −1 and 410 °C, respectively. This experimental achievement relies on the development of simple and reliable protocols to disperse and sort metallic and metal oxide nanopowders in aqueous solution and the establishment of specific DNA surface-modification processes for Al and CuO nanoparticles. Overall, our work, which shows that DNA can be used as a structural material to assemble Al/Al, CuO/CuO and Al/CuO composite materials, opens a route for molecular engineering of the material on the nanoscale.

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Section: Introductionmentioning

confidence: 84%

High‐Energy Al/CuO Nanocomposites Obtained by DNA‐Directed Assembly

Séverac

Alphonse

Estève

et al. 2011

Adv Funct Materials

152

108

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“…A large amount of heat (Q) is released in the classical reduction reaction [10] 0.65-1. 6 80 200 -30 nm [11] Al-WO 3 1-1.5 80 100 -20 nm [12] Al-Bi 2 O 3 1-1.5 80 25-2 μm (filaments) [13] 1 40, 100 40, 108, 321, 416 mn [12] Al-CuO 1-1.5 80 100-20 mn [12] Al-Fe 2 O 3 0.9-4 52 BET = 50-300 m 2 /g [14] A + y…”

Section: Powder Nanosystemsmentioning

confidence: 99%

“…For this reason, the use of the same initial nanopowders, which were stored and mixed under different conditions, usually yields different results in terms of ignition and combustion characteristics of such systems. The data on the chemical compositions and particle sizes of reagents of some superthermite systems studied in [5][6][7][8][9][10][11][12][13][14] are summarized in Table 1. The widest range of metal nanoparticles was provided in experiments with the Al-MoO 3 system.…”

Section: Powder Nanosystemsmentioning

confidence: 99%

Combustion of heterogeneous nanostructural systems (Review)

Рогачев

Mukasyan

2010

Combust Explos Shock Waves

139

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“…Additional information on the research conducted on nanothermites can be found in Refs. [186][187][188][189][190][191][192][193]. …”

Section: Figure 137mentioning

confidence: 99%

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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Combustion of Nanoscale Al/MoO3 Thermite in Microchannels

Cited by 164 publications

References 25 publications

High‐Energy Al/CuO Nanocomposites Obtained by DNA‐Directed Assembly

High‐Energy Al/CuO Nanocomposites Obtained by DNA‐Directed Assembly

Combustion of heterogeneous nanostructural systems (Review)

Nano Engineered Energetic Materials (NEEM)

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