Fully Dense, Aluminum-Rich Al-CuO Nanocomposite Powders for Energetic Formulations

Stamatis, Demitrios; Jiang, Zhi; Hoffmann, Vern K.; Schoenitz, Mirko; Dreizin, Edward L.

doi:10.1080/00102200802363294

Cited by 85 publications

(34 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(See Fig. 1) This is consistent with ignition results reported in previous studies [7,[15][16][17]. These studies conclude that a large amount of gas product is generated at a fuel-rich condition, and propagation is effective because generated gas enhances heat transfer [15][16][17].…”

Section: Resultssupporting

confidence: 93%

“…The stoichiometric reaction of Al-CuO composites for ideal combustion is 2Al + 3CuO → Al 2 O 3 + 3Cu, hence the theoretical Al:CuO molar ratio for complete combustion is 2:3. However, previous studies have reported that the highest propagation speed and pressurization rate occurs in an Al-rich environment even when substantial amount of Al components remain unreacted after combustion [7][8][9]. Whereas previous studies have alluded to the need for excess Al for a complete combustion, consensus on the mechanism underlying the non-stoichiometric optimum has not yet been established.…”

Section: Introductionmentioning

confidence: 92%

See 1 more Smart Citation

Formation of Cu layer on Al nanoparticles during thermite reaction in Al/CuO nanoparticle composites: Investigation of off-stoichiometry ratio of Al and CuO nanoparticles for maximum pressure change

Lee

Kim

Shim

et al. 2015

Combustion and Flame

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 92%

Formation of Cu layer on Al nanoparticles during thermite reaction in Al/CuO nanoparticle composites: Investigation of off-stoichiometry ratio of Al and CuO nanoparticles for maximum pressure change

Lee

Kim

Shim

et al. 2015

Combustion and Flame

View full text Add to dashboard Cite

“…There is a general trend of the increase of ignition temperature with the increase of heating rate but the ignition temperature was consistently smaller for nAlCu. Regardless of the heating rate effect, the ignition temperature of nAlCu was 564.7±10.8 o C, which was similar to that observed by Stamatis et al in their study of ignition of Al-CuO nanocomposites [46]. The ignition temperature of nAl under similar experimental conditions was 595.5 ± 8.1 o C. This again suggests that nAlCu was more reactive than nAl.…”

Section: Reactivity Comparison With Nalsupporting

confidence: 75%

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

et al. 2015

View full text Add to dashboard Cite

This work investigated the oxidation, ignition and thermal reactivity of alloy nanoparticles of aluminum and copper (nAlCu) using simultaneous thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) method. The microstructure of the particles was characterized with scanning electron microscope (SEM) and transmission electron microscope (TEM), and the elemental composition of the particles before and after the oxidation was investigated with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).The particles were heated from room temperature to 1200 o C under different heating rates from 2 to 30 K/min in the presence of air. The complete oxidation process of the nAlCu was characterized by two exothermic and two endothermic reactions, and the reaction paths up to 1200 o C were proposed. An early ignition of nAlCu, in the temperature around 565 o C, was found at heating rates ≥ 8 K/min. The eutectic melting temperature of nAlCu was identified at ~ 546 o C, which played a critical role in the early ignition. The comparison of the reactivity with that of pure Al nanoparticles showed that the nAlCu was more reactive through alloying.

show abstract

“…Details of this experimental technique are available elsewhere (Ward et al, 2006;Stamatis et al, 2009). A 0.5 mm diameter 4.5 cm long Nickel-Chromium alloy wire was used as the electrically heated filament.…”

Section: Methodsmentioning

confidence: 99%

Inactivation of Aerosolized Biological Agents using Filled Nanocomposite Materials

Grinshpun¹,

Schoenitz²,

Dreizin³

et al. 2013

View full text Add to dashboard Cite

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 this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE 3. DATES COVERED (From -To) Approved for public release; distribution is unlimited.In this multi-institutional grant, a new method for inactivating aerosolized biological agents was developed utilizing a new class of energetic materials: filled nanocomposite materials. The implemented approach enabled a controllable release of iodine-based oxidizing species in the combustion environment to inactivate viable airborne bio-agents, such as stress-resistant bacterial spores and viruses. Composites with adjustable Al/I2 ratios were produced. A state-of-the-art experimental facility was developed for studying how novel energetic formulations and their combustion products affect the viability of aerosolized spores and viruses during a short (< 1 s) exposure times. Controlled bioaerosol dispersal and sample collection protocols were developed and optimized. The dry-heat inactivation of aerosolized spores was quantified separately from chemical effects and linked to DNA repair mechanisms. It was concluded that the iodine-containing powder provided significantly more effective inactivation of airborne spores than non-iodinated powders. The results of this research help to better understand physical, physicochemical, and biological properties associated with inactivation of aerosolized bio-agents in combustion environments.Bioaerosol inactivation, spore, virus, bio-agent defeat, energetic material, iodine 1.000 000 x E -10 1.013 25 x E +2 1.000 000 x E +2 1.000 000 x E -28 1.054 350 x E +3 4.184 000 4.184 000 x E -2 3.700 000 x E +1 1.745 329 x E -2 t k = (t o f + 459.67)/1.8 1.602 19 x E -19 1.000 000 x E -7 1.000 000 x E -7 3.048 000 x E -1 1.355 818 3.785 412 x E -3 2.540 000 x E -2 1.000 000 x E +9 1.000 000 4.183 4.448 222 x E +3 6.894 757 x E +3 1.000 000 x E +2 1.000 000 x E -6 2.540 000 x E -5 1.609 344 x E +3 2.834 952 x E -2 4.448 222 1.129 848 x E -1 1.751 268 x E +2 4.788 026 x E -2 6.894 757 4.535 924 x E -1 4.214 011 x E -2 1.601 846 x E +1 1.000 000 x E -2 2.579 760 x E -4 1.000 000 x E -8 1.459 390 x E +1 1. ABSTRACTIn this multi-institutional grant, a new method for ...

show abstract

Fully Dense, Aluminum-Rich Al-CuO Nanocomposite Powders for Energetic Formulations

Cited by 85 publications

References 21 publications

Formation of Cu layer on Al nanoparticles during thermite reaction in Al/CuO nanoparticle composites: Investigation of off-stoichiometry ratio of Al and CuO nanoparticles for maximum pressure change

Formation of Cu layer on Al nanoparticles during thermite reaction in Al/CuO nanoparticle composites: Investigation of off-stoichiometry ratio of Al and CuO nanoparticles for maximum pressure change

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

Inactivation of Aerosolized Biological Agents using Filled Nanocomposite Materials

Contact Info

Product

Resources

About