Enhancing ignition and combustion of micron-sized aluminum by adding porous silicon

Parimi, Venkata Sharat; Huang, Sidi; Zheng, Xiaolin

doi:10.1016/j.proci.2016.06.185

Cited by 46 publications

(15 citation statements)

References 38 publications

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“…The samples were packed to have a similar porosity of ∼81–83%. The radiant energy received per unit area of Al/GO powders from the Xe flash tube, which is defined as the flash ignition energy (J/cm 2 ), was previously calibrated by measuring the temperature increase of a soot-covered silicon substrate exposed to the same power of flash. , Figure b shows the high-speed camera images of the neat GO powders, μ-Al particles, and μ-Al/GO (97/3 wt %) and μ-Al/GO (80/20 wt %) composites upon exposure to a full-power flash (2.1 J/cm 2 ). Under current experimental conditions, neat GO powders can react, but neat μ-Al particles cannot be ignited.…”

Section: Results and Discussionmentioning

confidence: 99%

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Jiang¹,

et al. 2018

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Optical ignition of solid energetic materials, which can rapidly release heat, gas, and thrust, is still challenging due to the limited light absorption and high ignition energy of typical energetic materials (e.g., aluminum, Al). Here, we demonstrated that the optical ignition and combustion properties of micron-sized Al particles were greatly enhanced by adding only 20 wt % of graphene oxide (GO). These enhancements are attributed to the optically activated disproportionation and oxidation reactions of GO, which release heat to initiate the oxidization of Al by air and generate gaseous products to reduce the agglomeration of the composites and promote the pressure rise during combustion. More importantly, compared to conventional additives such as metal oxides nanoparticles (e.g., WO 3 and Bi 2 O 3 ), GO has much lower density and therefore could improve energetic properties without sacrificing Al content. The results from Xe flash ignition and laser-based excitation experiments demonstrate that GO is an efficient additive to improve the energetic performance of micron-sized Al particles, enabling micron-sized Al to be ignited by optical activation and promoting the combustion of Al in air.

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Section: Results and Discussionmentioning

confidence: 99%

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Jiang¹,

et al. 2018

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“… 4–6 MICs are widely used in both civilian and military fields, such as propellants, pyrotechnics, aerospace devices, airbag ignition materials, pressure-mediated molecule delivery, and biomedicine-related applications. 7–9 Especially in the field of solid propellants, MICs have become a high-profile functional additive for solid propellants because of its own energy-containing and catalytic combustion function, and the alumina produced by thermite reaction has the effect of inhibiting unstable combustion.…”

Section: Introductionmentioning

confidence: 99%

Facile mass preparation and characterization of Al/copper ferrites metastable intermolecular energetic nanocomposites

Sang

Chen

et al. 2021

RSC Adv.

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“…The second-round heat flow traces were used to correct the baseline of the first-round heat flow traces following the method described previously. 25…”

Section: Methodsmentioning

confidence: 99%

Electroless Deposition and Ignition Properties of Si/Fe₂O₃ Core/Shell Nanothermites

et al. 2017

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Thermite, a composite of metal and metal oxide, finds wide applications in power and thermal generation systems that require high-energy density. Most of the researches on thermites have focused on using aluminum (Al) particles as the fuel. However, Al particles are sensitive to electrostatic discharge, friction, and mechanical impact, imposing a challenge for the safe handling and storage of Al-based thermites. Silicon (Si) is another attractive fuel for thermites because of its high-energy content, thin native oxide layer, and facile surface functionality. Several studies showed that the combustion properties of Si-based thermites are comparable to those of Al-based thermites. However, little is known about the ignition properties of Si-based thermites. In this work, we determined the reaction onset temperatures of mechanically mixed (MM) Si/Fe 2 O 3 nanothermites and Si/Fe 2 O 3 core/shell (CS) nanothermites using differential scanning calorimetry. The Si/Fe 2 O 3 CS nanothermites were prepared by an electroless deposition method. We found that the Si/Fe 2 O 3 CS nanoparticles (NPs) had a lower reaction onset temperature (∼550 °C) than the MM Si/Fe 2 O 3 nanothermites (>650 °C). The onset temperature of the Si/Fe 2 O 3 CS nanothermites is also insensitive to the size of the Si core NP. These results indicate that the interfacial contact quality between Si and Fe 2 O 3 is the dominant factor for determining the ignition properties of thermites. Finally, the reaction onset temperature of the Si/Fe 2 O 3 CS NPs is comparable to that of the commonly used Al-based nanothermites, suggesting that Si is an attractive fuel for thermites.

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Enhancing ignition and combustion of micron-sized aluminum by adding porous silicon

Cited by 46 publications

References 38 publications

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Facile mass preparation and characterization of Al/copper ferrites metastable intermolecular energetic nanocomposites

Electroless Deposition and Ignition Properties of Si/Fe₂O₃ Core/Shell Nanothermites

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Enhancing ignition and combustion of micron-sized aluminum by adding porous silicon

Cited by 46 publications

References 38 publications

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Energetic Performance of Optically Activated Aluminum/Graphene Oxide Composites

Facile mass preparation and characterization of Al/copper ferrites metastable intermolecular energetic nanocomposites

Electroless Deposition and Ignition Properties of Si/Fe2O3 Core/Shell Nanothermites

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Electroless Deposition and Ignition Properties of Si/Fe₂O₃ Core/Shell Nanothermites