Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Thermites"”.
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Ignition mechanism in nanocomposites thermites
Nanocomposite thermites (n-thermites) have been actively investigated for a wide range of potential applications including propellants, explosives, and pyrotechnics. There have been several recent efforts aimed at understanding ignition mechanisms of nanocomposite reactive materials. Although …
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Aerogels for energy storage applications: From shape memory materials to thermites and explosives
… exploded violently (500-900 ⁰C), or behaved as thermites ( ≥ 950 ⁰C)"--Abstract, page v
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Characterization framework to develop ball-milled thermites as additives to polymer-bound explosives
Increasing the energy density of plastic-bonded explosives (PBXs) by incorporating aluminum (Al) powders has long been of interest. However, Al combustion is kinetically slow, occurring on microsecond to millisecond timescales due to its dependence on external oxidizers. As a result, it contributes …
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Nanocomposite thermite powders with improved flowability prepared by mechanical milling
… approach for preparing various nanocomposite thermites with fully dense particles, which will retain their structures and mixedness between reactive components while being stored, handled, and processed. However, ARM products usually have broad particle size distributions, rock-like particle …
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An ultrafast thermal emission spectrometer for investigating temporal thermal emission of metal thin-films and their reactive derivatives
… for studying the reaction of nanolaminate thermites in both the temporal and spectral domains. 1mJ pulses from a Ti:Sapphire laser, stretched to 10ps, were focused onto sample films affixed to glass slides. The emission generated by the ablation of the films was collected and focused into a …
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Fully dense aluminum-rich aluminum copper oxide powders for energetic formulations
… reaction. For newly developed, nano-composed thermites, the interface area can be substantially increased resulting in a much higher reaction rate and a new range of possible applications. Nanocomposite Al-CuO materials are produced using a technique referred to as arrested reactive milling. …
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Nanotermites multicamadas de Al/NiO sintetizadas por Magnetron Sputtering
… of these compounds. In this work, nanostructured thermites, also called nanothermites, were synthesized and characterized in the form of multilayer thin films, synthesized by magnetron sputtering of Al / NiO with different stoichiometries. Some compositions have shown released amount of heat of …
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Reactive solids under shock compression
… dissertation chemically reactive solids, such as thermites and energy absorbing molecular materials, under shock compression are explored. To drive shock waves into target materials, an apparatus to launch and monitor laser-driven flyer-plates was developed. This was coupled to a home built …
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Ignition and combustion behaviors of nano-composite energetic materials
… the potential for enhanced energetic behavior of thermites. In this study, the ignition sensitivity of an aluminum molybdenum-trioxide (AI/M0O3) composite mixture was examined. Laser ignition experiments were performed to determine the ignition time and burn rates of newly developed nano-Al mixed …
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Modeling ignition and extinction in condensed phase combustion
The characteristics of ignition and extinction in thermites and intermetallics are a subject of interest in developing the latest generation of energetic materials. An experimental “striker confinement” shock compression experiment was developed in the Prof. Glumac’s research group at the …
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NOVEL SYNTHETIC METHODS AND APPLICATIONS OF POROUS MATERIALS: AEROGEL FOAMS, METALLIC AEROGELS, AMORPHOUS AND GRAPHITIC CARBON AEROGELS
… via carbothermal reduction, for application as thermites. III. Carbon aerogels were synthesized from compressed compacts of polyurea- and polyacrylonitrile-crosslinked silica xerogel powders. The process of making aerogels-via-xerogels allows to speed-up the solvent exchange process and bypasses …
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Diode laser gas sensing for high-speed temperature and speciation measurements inside explosive fireballs
… scales ranging from milligrams of spark ignited thermites in a 2-liter chamber, to 10s of grams of aluminized, plastic explosives in an 1800-liter chamber. All data validate the ability of the combined probe and data analytics to survive the implicitly destructive intensity of explosive …
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Multifunctional reactive nanocomposite materials
… the reaction mechanisms in nanocomposite thermites, two types of nanocomposite reactive materials with the same bulk compositions 8Al-MoO_3 were prepared by different methods. One of the materials was manufactured by ARM and the other, so called metastable interstitial composite (MIC), by …
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Reactions of aluminum with halogen containing oxides
… forming bacteria are currently being examined. Thermites may be an effective method to produce high temperature reactions, and some compositions such as aluminum (Al) and iodine pentoxide (I2O5) also have biocidal properties. This study examines the thermal degradation behavior of I2O5 mixed …
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Spectroscopic characterization of molecular and atomic iodine
This research looks to characterize molecular and atomic iodine to benefit to the ability of molecular iodine to act as a biocidal agent. There is much literature on the topic of iodine as a bacterial suppressant and the effectiveness of various mixtures. However, there is little research available …