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Showing 1 to 19 of 19 for “"Aluminum powder"”.
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Characterization of aluminum powder ignition
… size effect on ignition temperature of Al powder were studied to collect data for development of a possible Al powder ignition model. Aluminum ignition is associated with a highly accelerated burn rate and high combustion enthalpy. A new ignition model, which can adequately interpret these …
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Explosive property of aluminum powder liquid oxygen mixture
… optimum conditions for explosion of a mixture of aluminum powder and liquid oxygen when fired without the use of a fixed detonator.</p>
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Experimental Investigation of Gaseous Oxyacetylene Blast Enhancement by the Combustion of Suspended Multimodal Spherical Aluminum Powder
Multimodal micron-sized spherical aluminum powders were subjected to the detonation products of a gaseous oxyacetylene mixture. The objective was to analyze the blast enhancement from the combustion of non-uniform-sized aluminum particles. These multimodal aluminum powders consisted of a 50/50 …
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On the behavior of infiltrating aluminum into compacts comprised of silicon carbide and aluminum powder mixed with silicon carbide
Includes bibliographical references.
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Investigation of a hydrogen production process through aluminum and water chemical reaction
… up, which utilized the chemical reaction between aluminum and water to produce hydrogen. The constructed experimental setup had an aluminum powder spraying subsystem integrated within the overall setup. The effectiveness of this experimental set up was improved by using a fine size aluminum powder …
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The measured variation of the Debye-Waller factor of aluminum from 295K to 815K by using the energy dispersive x-ray diffraction technique
… the intensities of the diffraction lines of aluminum powder sample as a function of temperature. At first, intensity measurements at high temperature were not reproducible. After some modifications have been made, we were able to measure the intensities of the diffraction lines to 815K, with …
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Investigation of enhanced aluminum casings for underwater explosives and development of spectroscopic techniques for measuring temperature in environments relevant to underwater ordnance
Enhanced aluminum casings for high explosives were examined both experimentally and theoretically. The experimental analysis utilized aluminum cylinders with linear shaped charges embedded on the surface. The cavities produced jets which outperformed the regions on the cylinder without cavities in …
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Experiment and modeling : ignition of aluminum particles with a CO2 laser
Aluminum is a promising ingredient for high energy density compositions used in propulsion systems, explosives, and pyrotechnics. Aluminum powder fuel additives enable one to achieve higher combustion enthalpies and reaction temperatures. Therefore, to develop aluminum based novel and customized …
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Synthesis and characterization of atmospheric pressure chemically vapor deposited aluminum
… vapor deposition (APCVD) to produce high quality aluminum coatings for corrosion protection of steel. The coatings were produced through thermal decomposition of tri-isobutyl-aluminum (TIBAL) over the 275 to 300 C temperature range. Under optimal deposition conditions, growth rates as high as 1.2 …
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Laminar burning velocity measurements of stabilized aluminum dust flames
… in the present work. The dust used was aluminum powder with an average particle diameter of approximately 5 microns. Dust flames, in comparison to gas flames, are thicker and brighter, may be influenced by radiation heat transfer, respond differently to heat losses, and are influenced by …
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Fabrication, Characterization and Modeling of Functionally Graded Materials
… sedimentation method has been used to fabricate aluminum (Al) and high-density polyethylene (HDPE) FGMs. The size effect of aluminum powder on the material gradation along the depth direction is investigated. Aluminum powder or the mixture of Al and HDPE powder is thoroughly mixed and uniformly …
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Stress Intensity Factor Distributions in Bimaterial Systems - A Three Dimensional Photoelastic Investigation
… same material containing a moderate quantity of aluminum powder (for elastic stiffening purposes). Moderate yet similar increases in stress intensity factors are observed in bonded homogeneous and bonded bimaterial specimens, suggesting the presence of bondline residual stresses (rather than …
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Piezoresistivity Characterization of Polymer Bonded Energetic Nanocomposites under Cyclic Load Cases for Structural Health Monitoring Applications
… served as the inert energetic and atomized aluminum as the metallic fuel, both of which were combined to create a representative fuel-oxidizer filler often used for aerospace propulsive applications. MWCNTs were dispersed within an elastomer binder of polydimethylsiloxane (PDMS), and hybrid …
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A feasibility study of the use of microwaves to measure radical and differential burning rates in solid propellant rockets
… in oil, and the time. The addition of the aluminum powder to the oil simulating aluminized propellants did not prevent detection of the moving surface. The results indicated that the microwave technique can be applied to aluminized propellants.
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Design And Implementation Of An Emission Spectroscopy Diagnostic In A High-pressure Strand Burner For The Study Of Solid Propell
… One propellant formula contained a fine aluminum powder, acting as a fuel, mixed with ammonium perchlorate (AP), an oxidizer. The powders were held together with Hydroxyl-Terminated-Polybutadiene (HTPB), a hydrocarbon polymer that is solidified using a curative after all components are …
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Combustion dynamics of metal powders in mixed gas flows
… energetic formulations using micron-sized metal powders, such as aluminum and magnesium. Most current descriptions are based on laboratory experiments performed in stationary or laminar combustion configurations using pure metals burned in single oxidizers. However, practical configurations take …
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Enhancement of Pool Boiling Heat Transfer by Brazed Aluminum Microporous Coating in Saturated Water
… developed in this experimental work by adding an aluminum microporous coating onto an aluminum surface. Specifically, a high temperature thermally conductive microporous coating (HTCMC) is developed for an aluminum surface. The coating is manufactured by brazing an aluminum powder onto a plain …
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Explosive initiation of various forms of the Ti/2B energetic system
Metal additives, such as aluminum, are commonly added to explosives in order to generate higher energy release and overpressures. However, these types of additives are ineffective in enabling a satisfactory level of control over the weapon’s blast effects. Metal-based reactive materials (RM) are of …
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Using optical techniques to measure aluminum burning in post-detonation explosive fireballs
… propellants to increase the heat of explosion. Aluminum is commonly used because it has a high energy density, is relatively inexpensive, is easy to produce, and has a low toxicity. To optimize the performance and safety of aluminized explosives, it is necessary to understand where, when, and …