Powered by Deep Web Technologies
Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Production of aluminum metal by electrolysis of aluminum sulfide  

DOE Patents (OSTI)

Production of metallic aluminum by the electrolysis of Al.sub.2 S.sub.3 at 700.degree.-800.degree. C. in a chloride melt composed of one or more alkali metal chlorides, and one or more alkaline earth metal chlorides and/or aluminum chloride to provide improved operating characteristics of the process.

Minh, Nguyen Q. (Woodridge, IL); Loutfy, Raouf O. (Tucson, AZ); Yao, Neng-Ping (Clarendon Hills, IL)

1984-01-01T23:59:59.000Z

2

SOLDERING OF ALUMINUM BASE METALS  

DOE Patents (OSTI)

This patent deals with the soldering of aluminum to metals of different types, such as copper, brass, and iron. This is accomplished by heating the aluminum metal to be soldered to slightly above 30 deg C, rubbing a small amount of metallic gallium into the part of the surface to be soldered, whereby an aluminum--gallium alloy forms on the surface, and then heating the aluminum piece to the melting point of lead--tin soft solder, applying lead--tin soft solder to this alloyed surface, and combining the aluminum with the other metal to which it is to be soldered.

Erickson, G.F.

1958-02-25T23:59:59.000Z

3

Formation of nanocrystalline h-AlN during mechanochemical decomposition of melamine in the presence of metallic aluminum  

Science Conference Proceedings (OSTI)

Decomposition of melamine was studied by solid state reaction of melamine and aluminum powders during high energy ball-milling. The milling procedure performed for both pure melamine and melamine/Al mixed powders as the starting materials for various times up to 48 h under ambient atmosphere. The products were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results revealed that Al causes melamine deammoniation at the first stages of milling and further milling process leads to the s-triazine ring degradation while nano-crystallite hexagonal aluminum nitride (h-AlN) was the main solid product. Comparison to milling process, the possibility of the reaction of melamine with Al was also investigated by thermal treatment method using differential scanning calorimeter (DSC) and thermo gravimetric analyzer (TGA). Melamine decomposition occurred by thermal treatment in the range of 270-370 Degree-Sign C, but no reaction between melamine and aluminum was observed. - Graphical Abstract: Mechanochemical reaction of melamine with Al resulted in the formation of nanocrystalline AlN after 7 h milling time Highlights: Black-Right-Pointing-Pointer High energy ball milling of melamine and aluminum results decomposition of melamine with elimination of ammonia. Black-Right-Pointing-Pointer Nano-crystalline AlN was synthesized by the mechanochemical route. Black-Right-Pointing-Pointer Milling process has no conspicuous effect on pure melamine degradation. Black-Right-Pointing-Pointer No reaction takes place by heating melamine and aluminum powder mixture in argon.

Rounaghi, S.A., E-mail: s.a.rounaghi@gmail.com [Department of Materials Engineering, Ferdowsi University of Mashhad, P.O. Box No. 91775-1111, Mashhad (Iran, Islamic Republic of); Kiani Rashid, A.R. [Department of Materials Engineering, Ferdowsi University of Mashhad, P.O. Box No. 91775-1111, Mashhad (Iran, Islamic Republic of); Eshghi, H., E-mail: heshghi@ferdowsi.um.ac.ir [Department of Chemistry, Ferdowsi University of Mashhad, P.O. Box No. 91775-1436, Mashhad (Iran, Islamic Republic of); Vahdati Khaki, J. [Department of Materials Engineering, Ferdowsi University of Mashhad, P.O. Box No. 91775-1111, Mashhad (Iran, Islamic Republic of)

2012-06-15T23:59:59.000Z

4

Method of winning aluminum metal from aluminous ore  

DOE Patents (OSTI)

Aluminous ore such as bauxite containing alumina is blended with coke or other suitable form of carbon and reacted with sulfur gas at an elevated temperature. For handling, the ore and coke can be extruded into conveniently sized pellets. The reaction with sulfur gas produces molten aluminum sulfide which is separated from residual solid reactants and impurities. The aluminum sulfide is further increased in temperature to cause its decomposition or sublimation, yielding aluminum subsulfide liquid (AlS) and sulfur gas that is recycled. The aluminum monosulfide is then cooled to below its disproportionation temperature to again form molten aluminum sulfide and aluminum metal. A liquid-liquid or liquid-solid separation, depending on the separation temperature, provides product aluminum and aluminum sulfide for recycle to the disproportionation step.

Loutfy, Raouf O. (Naperville, IL); Keller, Rudolf (Naperville, IL); Yao, Neng-Ping (Clarendon Hills, IL)

1981-01-01T23:59:59.000Z

5

Al-Zr (Aluminum - Zirconium)  

Science Conference Proceedings (OSTI)

Al-Zr crystallographic data...6 3 / mcm ZrAl 22.8 oC 8 Cmcm Zr 2 Al 3 31 oF 40 Fdd 2 ZrAl 2 37.2 hP 12 P 6 3 / mmc ZrAl 3 47 tI 16 I 4/ mmm (Al) 99.86 to 100 cF 4 Fm m...

6

Prediction of Bake Hardenability of Aluminum Alloys Al6110 and ...  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

7

Dissolution Studies of Si Metal in Liquid Al under Different Forced ...  

Science Conference Proceedings (OSTI)

Presentation Title, Dissolution Studies of Si Metal in Liquid Al under Different Forced ... studies of Silicon metal in liquid Aluminum will be reported under natural and ... conditions of two-phase flow, utilizing Nitrogen gas, in liquid Aluminum will ...

8

Quick Plastic Forming of Aluminum Sheet Metal  

NLE Websites -- All DOE Office Websites (Extended Search)

General Motors' President North America, Gary Cowger, General Motors' President North America, Gary Cowger, reviews the 2004 Chevy Malibu Maxx after introducing it to the media at the New York Auto Show. (photo courtesy of General Motors) Quick Plastic Forming of Aluminum Sheet Metal Background Aluminum automotive components made using a hot blow forming process are reducing vehicle weight and increasing the fuel efficiency of today's cars. However, before General Motors (GM) and the U.S. Department of Energy (DOE) sponsored research in this technol- ogy, blow forming of aluminum was not a viable process for automakers. The prior blow forming process,

9

Aluminum - Fly Ash Metal Matrix Composites as Advanced Automobile Material  

Science Conference Proceedings (OSTI)

Metal matrix composites such as silicon carbide-aluminum, alumina-aluminum, and graphite-aluminum represent a class of emerging materials with significant potential for commercial use in the auto and aerospace industries. In industrial foundry trials, a joint industry and Department of Energy project demonstrated a promising new process for producing a low cost aluminum metal matrix composite containing fly ash particles.

2001-08-16T23:59:59.000Z

10

Investigation on Aluminum-Based Amorphous Metallic Glass as New Anode Material in Lithium Ion Batteries  

E-Print Network (OSTI)

Aluminum based amorphous metallic glass powders were produced and tested as the anode materials for the lithium ion rechargeable batteries. Ground Al??Ni₁?La₁? was found to have a ...

Meng, Shirley Y.

11

Influence of Aluminum Content on Grain Refinement and Strength of AZ31 Magnesium GTA Weld Metal  

SciTech Connect

The goal is to characterize the effect of Al content on AZ31 weld metal, the grain size and strength, and examine role of Al on grain refinement. The approach is to systematically vary the aluminum content of AZ31 weld metal, Measure average grain size in weld metal, and Measure cross-weld tensile properties and hardness. Conclusions are that: (1) increased Al content in AZ31 weld metal results in grain refinement Reason: higher undercooling during solidification; (2) weld metal grain refinement resulted in increased strength & hardness Reason: grain boundary strengthening; and (3) weld metal strength can be raised to wrought base metal levels.

Babu, N. Kishore [Singapore Institute of Manufacturing Technology; Cross, Carl E. [Los Alamos National Laboratory

2012-06-28T23:59:59.000Z

12

Aluminum-Alkaline Metal-Metal Composite Conductor - Energy ...  

High-voltage electric power transmission cables based on pure aluminum strands with a stranded steel core (ACSR) or stranded aluminum ... Applications and Industries.

13

Light Metals: Aluminum, Magnesium, and Titanium  

Science Conference Proceedings (OSTI)

Cast Shop for Aluminum Production ... In this proposed, six-session symposium, papers addressing all aspects of cost reduction in titanium and its alloys will be ...

14

Aluminum low temperature smelting cell metal collection  

DOE Patents (OSTI)

A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte. The method comprises the steps of providing a molten salt electrolyte in an electrolytic cell having an anodic liner for containing the electrolyte, the liner having an anodic bottom and walls including at least one end wall extending upwardly from the anodic bottom, the anodic liner being substantially inert with respect to the molten electrolyte. A plurality of non-consumable anodes is provided and disposed vertically in the electrolyte. A plurality of cathodes is disposed vertically in the electrolyte in alternating relationship with the anodes. The anodes are electrically connected to the anodic liner. An electric current is passed through the anodic liner to the anodes, through the electrolyte to the cathodes, and aluminum is deposited on said cathodes. Oxygen bubbles are generated at the anodes and the anodic liner, the bubbles stirring the electrolyte. Molten aluminum is collected from the cathodes into a tubular member positioned underneath the cathodes. The tubular member is in liquid communication with each cathode to collect the molten aluminum therefrom while excluding electrolyte. Molten aluminum is delivered through the tubular member to a molten aluminum reservoir located substantially opposite the anodes and cathodes. The molten aluminum is collected from the cathodes and delivered to the reservoir while avoiding contact of the molten aluminum with the anodic bottom.

Beck, Theodore R. (Seattle, WA); Brown, Craig W. (Seattle, WA)

2002-07-16T23:59:59.000Z

15

Recovery of aluminum and other metal values from fly ash  

DOE Patents (OSTI)

The invention relates to a method for improving the acid leachability of aluminum and other metal values found in fly ash which comprises sintering the fly ash, prior to acid leaching, with a calcium sulfate-containing composition at a temperature at which the calcium sulfate is retained in said composition during sintering and for a time sufficient to quantitatively convert the aluminum in said fly ash into an acid-leachable form.

McDowell, W.J.; Seeley, F.G.

1979-11-01T23:59:59.000Z

16

Recovery of aluminum and other metal values from fly ash  

DOE Patents (OSTI)

The invention described herein relates to a method for improving the acid leachability of aluminum and other metal values found in fly ash which comprises sintering the fly ash, prior to acid leaching, with a calcium sulfate-containing composition at a temperature at which the calcium sulfate is retained in said composition during sintering and for a time sufficient to quantitatively convert the aluminum in said fly ash into an acid-leachable form.

McDowell, William J. (Oak Ridge, TN); Seeley, Forest G. (Oak Ridge, TN)

1981-01-01T23:59:59.000Z

17

Aluminum-Alkaline Metal-Metal Composite Conductor - Energy ...  

Wind Energy; Partners (27) Visual Patent Search; Success Stories; News; Events; Electricity Transmission Early Stage R&D Advanced Materials Aluminum ...

18

Mechanical Damping Properties of Al-Si Closed-Cell Aluminum Foam  

Science Conference Proceedings (OSTI)

The measured loss factor shows that Al-Si closed-cell aluminum foam have a damping capacity which is independent of frequency and increases with ...

19

Al-Cr -2007-1 February 1, 2007 Aluminum and Chromium Leaching ...  

Al-Cr -2007-1 February 1, 2007 Aluminum and Chromium Leaching Workshop Atlanta, GA January 23 – 24, 2007 Crowne Plaza – Airport Feedback Questionnaire

20

Inert anode containing base metal and noble metal useful for the electrolytic production of aluminum  

DOE Patents (OSTI)

An inert anode for production of metals such as aluminum is disclosed. The inert anode comprises a base metal selected from Cu and Ag, and at least one noble metal selected from Ag, Pd, Pt, Au, Rh, Ru, Ir and Os. The inert anode may optionally be formed of sintered particles having interior portions containing more base metal than noble metal and exterior portions containing more noble metal than base metal. In a preferred embodiment, the base metal comprises Cu, and the noble metal comprises Ag, Pd or a combination thereof.

Ray, Siba P. (Murrysville, PA); Liu, Xinghua (Monroeville, PA)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Spray-forming monolithic aluminum alloy and metal matrix composite strip  

SciTech Connect

Spray forming with de Laval nozzles is an advanced materials processing technology that converts a bulk liquid metal to a near-net-shape solid by depositing atomized droplets onto a suitably shaped substrate. Using this approach, aluminum alloys have been spray formed as strip, with technoeconomic advantages over conventional hot mill processing and continuous casting. The spray-formed strip had a flat profile, minimal porosity, high yield, and refined microstructure. In an adaptation to the technique, 6061 Al/SiC particulate-reinforced metal matrix composite strip was produced by codeposition of the phases.

McHugh, K.M.

1995-10-01T23:59:59.000Z

22

Aluminum  

Science Conference Proceedings (OSTI)

"Developing an Integrated Information System in a Modern Aluminum Smelter" ... "The Energy Crisis and the Aluminum Industry: Can We Learn from History? ... "

23

Low coverage spontaneous etching and hyperthermal desorption of aluminum chlorides from Cl2 Al,,111...  

E-Print Network (OSTI)

spectrometry has been used to monitor the desorption of aluminum chloride (AlxCly) etch products from the Al-probable velocity of 517 22 m/s at an Al 111 surface temperature of 100 K. This corresponds to 22 times the expected thermal desorption translational energy for AlCl3 . Cl2 sticking probability measurements and AlxCly etch

Kummel, Andrew C.

24

First principles predictions of intrinsic defects in aluminum arsenide, AlAs : numerical supplement.  

SciTech Connect

This Report presents numerical tables summarizing properties of intrinsic defects in aluminum arsenide, AlAs, as computed by density functional theory. This Report serves as a numerical supplement to the results published in: P.A. Schultz, 'First principles predictions of intrinsic defects in Aluminum Arsenide, AlAs', Materials Research Society Symposia Proceedings 1370 (2011; SAND2011-2436C), and intended for use as reference tables for a defect physics package in device models.

Schultz, Peter Andrew

2012-04-01T23:59:59.000Z

25

Light Metals 2007 Volume 2: Aluminum Reduction TABLE OF ...  

Science Conference Proceedings (OSTI)

451-456] Mark Cooksey and William Yang. Further Results on the Application of Aluminum-Copper Bimetal Sheets in Aluminum Reduction Cells [pp. 457-460

26

Novel Synthesis of Nanostructured Hairy Aluminum/AlOOH Core ...  

Science Conference Proceedings (OSTI)

Synthesis of Monolithic Iron Incorporated Silica Aerogels by Ambient Pressure Drying · The Characteristics of Metal Nanowire Catalyzing Methanol Anodization

27

Aluminum reference electrode  

DOE Patents (OSTI)

A stable reference electrode for use in monitoring and controlling the process of electrolytic reduction of a metal. In the case of Hall cell reduction of aluminum, the reference electrode comprises a pool of molten aluminum and a solution of molten cryolite, Na.sub.3 AlF.sub.6, wherein the electrical connection to the molten aluminum does not contact the highly corrosive molten salt solution. This is accomplished by altering the density of either the aluminum (decreasing the density) or the electrolyte (increasing the density) so that the aluminum floats on top of the molten salt solution.

Sadoway, Donald R. (Belmont, MA)

1988-01-01T23:59:59.000Z

28

Aluminum reference electrode  

DOE Patents (OSTI)

A stable reference electrode is described for use in monitoring and controlling the process of electrolytic reduction of a metal. In the case of Hall cell reduction of aluminum, the reference electrode comprises a pool of molten aluminum and a solution of molten cryolite, Na[sub 3]AlF[sub 6], wherein the electrical connection to the molten aluminum does not contact the highly corrosive molten salt solution. This is accomplished by altering the density of either the aluminum (decreasing the density) or the electrolyte (increasing the density) so that the aluminum floats on top of the molten salt solution. 1 fig.

Sadoway, D.R.

1988-08-16T23:59:59.000Z

29

Treatment and Minimization of Aluminum and Light Metals Industry ...  

Science Conference Proceedings (OSTI)

... reverberatory and rotary aluminum furnaces, reverberatory and rotary lead furnaces, as well as rotary brass furnaces. Representative examples are presented ...

30

Method of making AlInSb by metal-organic chemical vapor deposition  

DOE Patents (OSTI)

A method for producing aluminum-indium-antimony materials by metal-organic chemical vapor deposition (MOCVD). This invention provides a method of producing Al.sub.X In.sub.1-x Sb crystalline materials by MOCVD wherein an Al source material, an In source material and an Sb source material are supplied as a gas to a heated substrate in a chamber, said Al source material, In source material, and Sb source material decomposing at least partially below 525.degree. C. to produce Al.sub.x In.sub.1-x Sb crystalline materials wherein x is greater than 0.002 and less than one.

Biefeld, Robert M. (Albuquerque, NM); Allerman, Andrew A. (Albuquerque, NM); Baucom, Kevin C. (Albuquerque, NM)

2000-01-01T23:59:59.000Z

31

Treatment and Minimization of Aluminum and Light Metals Industry ...  

Science Conference Proceedings (OSTI)

3:15 pm. PRODUCTION OF VALUE-ADDED PRODUCTS THROUGH PHOSPHATE STABILIZATION OF ALUMINUM INDUSTRY WASTE: Arun S. Wagh, Energy ...

32

Al-Ca and Al-Fe metal-metal composite strength, conductivity, and microstructure relationships  

SciTech Connect

Deformation processed metal-metal composites (DMMC’s) are composites formed by mechanical working (i.e., rolling, swaging, or wire drawing) of two-phase, ductile metal mixtures. Since both the matrix and reinforcing phase are ductile metals, the composites can be heavily deformed to reduce the thickness and spacing of the two phases. Recent studies have shown that heavily drawn DMMCs can achieve anomalously high strength and outstanding combinations of strength and conductivity. In this study, Al-Fe wire composite with 0.07, 0.1, and 0.2 volume fractions of Fe filaments and Al-Ca wire composite with 0.03, 0.06, and 0.09 volume fractions of Ca filaments were produced in situ, and their mechanical properties were measured as a function of deformation true strain. The Al-Fe composites displayed limited deformation of the Fe phase even at high true strains, resulting in little strengthening effect in those composites. Al-9vol%Ca wire was deformed to a deformation true strain of 13.76. The resulting Ca second-phase filaments were deformed to thicknesses on the order of one micrometer. The ultimate tensile strength increased exponentially with increasing deformation true strain, reaching a value of 197 MPa at a true strain of 13.76. This value is 2.5 times higher than the value predicted by the rule of mixtures. A quantitative relationship between UTS and deformation true strain was determined. X-ray diffraction data on transformation of Al + Ca microstructures to Al + various Al-Ca intermetallic compounds were obtained at the Advanced Photon Source at Argonne National Laboratory. Electrical conductivity was measured over a range of true strains and post-deformation heat treatment schedules.

Kim, Hyong June

2011-12-01T23:59:59.000Z

33

Process for the fabrication of aluminum metallized pyrolytic graphite sputtering targets  

DOE Patents (OSTI)

An improved method for fabricating pyrolytic graphite sputtering targets with superior heat transfer ability, longer life, and maximum energy transmission. Anisotropic pyrolytic graphite is contoured and/or segmented to match the erosion profile of the sputter target and then oriented such that the graphite's high thermal conductivity planes are in maximum contact with a thermally conductive metal backing. The graphite contact surface is metallized, using high rate physical vapor deposition (HRPVD), with an aluminum coating and the thermally conductive metal backing is joined to the metallized graphite target by one of four low-temperature bonding methods; liquid-metal casting, powder metallurgy compaction, eutectic brazing, and laser welding.

Makowiecki, Daniel M. (Livermore, CA); Ramsey, Philip B. (Livermore, CA); Juntz, Robert S. (Hayward, CA)

1995-01-01T23:59:59.000Z

34

The Dynamic Constitutive Response of Four Light Metals: Al 7039 ...  

Science Conference Proceedings (OSTI)

Presentation Title, The Dynamic Constitutive Response of Four Light Metals: Al 7039, ... Atomistically-Informed Dislocation Dynamics Simulations of High Rate ...

35

Microstructure and Properties of Aluminum Metal Matrix Composite ...  

Science Conference Proceedings (OSTI)

Fabrication of Metal Matrix Composites via Spark Plasma Sintering for Nuclear Energy Application · Hollow Particle Filled Lightweight Composites: Weight ...

36

High-nitrogen-metal complexes as burning-rate modifiers for the aluminum-water propellant system  

DOE Green Energy (OSTI)

The reactions of electropositive metals, such as aluminum, with water have long been utilized in explosive and propellant formulations, but until recently this has mostly been limited to the water formed as a product gas from the decomposition of another energetic system . Recently, however, with the increased availability of nano-particulate materials, the direct reaction of nano-aluminum (nAl) with water as an oxidizer has been investigated as a propellant system due to high reaction temperatures and the production of hydrogen as the primary gaseous species. This system could be useful for intra-planetary travel where non-terrestrial water is harvested for the oxidizer. Here we present the study of nAl, mixed at a stoichiometric ratio with water ({Phi} = 1) with the highly water soluble metal complexes of bis(tetrazolato)amine (BTA) added at 5, 15,30 and 50 wt% in the case of FeBTA and 5 and 15 wt% in the case of NiBTA and CoBTA. The basic structure of the BTA complexes is shown below where M = Fe, Ni or Co, and x = 3 for Fe and Co and x = 2 for Ni. The particle size of nAl studied was primarily 38 nm with various studies with the particle size of 80 nm. The FeBT A at a loading of 15 wt% gave the highest burning rate enhancement (4.6x at {approx}6.8 MPa), while retaining a low pressure exponent (0.21 compared to 0.24 for nA/H{sub 2}O). At 15 wt% the Ni and Co increased the burning rate, but also increased the pressure exponents. The burning rate of the FeBTA modified material with 80 nm Al decreased as the weight percent of FeBTA was increased, which also tracked decrease in the calculated specific impulse of the mixtures.

Tappan, Bryce C [Los Alamos National Laboratory; Mason, Benjamin A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

37

D22: Microstructural Characterization of Aluminum Metal Matrix ...  

Science Conference Proceedings (OSTI)

A Sintering Ore Blending Optimization Model Based on 'Iron Increase and Silicon ... on the Al2O3 Extraction Rate during Acid Leaching Process of Coal Fly Ash.

38

First-principles investigations of Ni3Al(111) and NiAl(110) surfaces at metal dusting conditions  

SciTech Connect

We investigate the structure and surface composition of the {gamma}{prime}-Ni{sub 3}Al(111) and {beta}-NiAl(110) alloy surfaces at conditions relevant for metal dusting corrosion related to catalytic steam reforming of natural gas. In regular service as protective coatings, nickel-aluminum alloys are protected by an oxide scale, but in case of oxide scale spallation, the alloy surface may be directly exposed to the reactive gas environment and vulnerable to metal dusting. By means of density functional theory and thermochemical calculations for both the Ni{sub 3}Al and NiAl surfaces, the conditions under which CO and OH adsorption is to be expected and under which it is inhibited, are mapped out. Because CO and OH are regarded as precursors for nucleating graphite or oxide on the surfaces, phase diagrams for the surfaces provide a simple description of their stability. Specifically, this study shows how the CO and OH coverages depend on the steam to carbon ratio (S/C) in the gas and thereby provide a ranking of the carbon limits on the different surface phases.

Saadi, Souheil

2011-03-01T23:59:59.000Z

39

Boron-carbide-aluminum and boron-carbide-reactive metal cermets  

SciTech Connect

Hard, tough, lightweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidation step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modulus of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi.sqroot.in. These composites and methods can be used to form a variety of structural elements.

Halverson, Danny C. (Manteca, CA); Pyzik, Aleksander J. (Seattle, WA); Aksay, Ilhan A. (Seattle, WA)

1986-01-01T23:59:59.000Z

40

Comparative Study on the Metal Aluminum Produced from Alumina ...  

Science Conference Proceedings (OSTI)

Chemical Enrichment of Precious Metals in Iron Sulfides Using Microwave Energy · Chloridizing ... Co-Gasification Behavior of Metallurgical Coke with High and Low Reactivity .... Thermal Plasma Torches for Metallurgical Applications.

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

aluminum processing  

Science Conference Proceedings (OSTI)

Refining of Potroom Metal Using the Hydro Ram Crucible Fluxing Process [pp. .... Approachgeneration of Aluminum Wrought Alloy Scrap of Old Cars [pp.

42

Process for the fabrication of aluminum metallized pyrolytic graphite sputtering targets  

DOE Patents (OSTI)

An improved method is disclosed for fabricating pyrolytic graphite sputtering targets with superior heat transfer ability, longer life, and maximum energy transmission. Anisotropic pyrolytic graphite is contoured and/or segmented to match the erosion profile of the sputter target and then oriented such that the graphite`s high thermal conductivity planes are in maximum contact with a thermally conductive metal backing. The graphite contact surface is metallized, using high rate physical vapor deposition (HRPVD), with an aluminum coating and the thermally conductive metal backing is joined to the metallized graphite target by one of four low-temperature bonding methods; liquid-metal casting, powder metallurgy compaction, eutectic brazing, and laser welding. 11 figs.

Makowiecki, D.M.; Ramsey, P.B.; Juntz, R.S.

1995-07-04T23:59:59.000Z

43

Energy Conservation Design Features of the ARCO Metals Logan County Aluminum Process Complex  

E-Print Network (OSTI)

ARCO Metals Company (Formerly Anaconda Aluminum Company) is proceeding as scheduled with the construction of a $400 Million aluminum processing complex in Logan County, Kentucky. When the initial construction phase is completed in the Fall 1983, the complex will be capable of producing 400 million pounds per year of aluminum, sheet and foil using highly automated, computer controlled equipment that will maximize end product quality and minimize the consumption of energy. This paper will describe the basic processes used in the Logan complex and several design features that are being incorporated to reduce energy consumption. Large reverberatroy melting furnaces will remelt scrap aluminum and ingots will be cast on site to supplement those delivered to the site from ARCO Metal's reduction plants. The melting furnaces are expected to achieve a high efficiency which will be further enhanced by the utilization of exhaust gases to preheat the scrap as well as the combustion air. A coreless induction furnace will be used to reduce the melt loss normally associated with light gauge scrap. The ingots will be heated prior to rolling in the hot mill in direct fired preheating furnaces with variable speed fans that minimize cycle time. Flue gasses from these furnaces will be used to generate steam In a waste heat boiler. Motor loads in the hot mill and cold mills, along with other electrical loads, will be monitored by a computer system to minimize peak loading on the TVA power system. Annealing of aluminum coils will be accomplished in radiant tube furnaces with variable speed fan drives in an inert atmosphere produced by an electric powered air separation plant. These furnaces will use recuperative burners. The HVAC system incorporates a feature that will recover stratified hot air for use in other parts of the complex for ambient temperature control.

Speer, J. A.

1983-01-01T23:59:59.000Z

44

Influence of Alloy and Solidification Parameters on Grain Refinement in Aluminum Weld Metal due to Inoculation  

Science Conference Proceedings (OSTI)

The goals are: (1) Establish how much Ti/B grain refiner is need to completely refine aluminum weld metal for different alloys and different welding conditions; (2) Characterize how alloy composition and solidification parameters affect weld metal grain refinement; and (3) Apply relevant theory to understand observed behavior. Conclusions are: (1) additions of Ti/B grain refiner to weld metal in Alloys 1050, 5083, and 6082 resulted in significant grain refinement; (2) grain refinement was more effective in GTAW than LBW, resulting in finer grains at lower Ti content - reason is limited time available for equiaxed grain growth in LBW (inability to occlude columnar grain growth); (3) welding travel speed did not markedly affect grain size within GTAW and LBW clusters; and (4) application of Hunt CET analysis showed experimental G to be on the order of the critical G{sub CET}; G{sub CET} was consistently higher for GTAW than for LBW.

Schempp, Philipp [BAM, Germany; Tang, Z. [BIAS, Germany; Cross, Carl E. [Los Alamos National Laboratory; Seefeld, T. [BIAS, Germany; Pittner, A. [BAM, Germany; Rethmeier, M. [BAM, Germany

2012-06-28T23:59:59.000Z

45

Manual gas tungsten arc (dc) and semiautomatic gas metal arc welding of 6XXX aluminum. Welding procedure specification  

SciTech Connect

Procedure WPS-1009 is qualified under Section IX of the ASME Boiler and Pressure Vessel Code for manual gas tungsten arc (DC) and semiautomatic gas metal arc (DC) welding of aluminum alloys 6061 and 6063 (P-23), in thickness range 0.187 to 2 in.; filler metal is ER4043 (F-23); shielding gases are helium (GTAW) and argon (GMAW).

Wodtke, C.H.; Frizzell, D.R.; Plunkett, W.A.

1985-08-01T23:59:59.000Z

46

Metal and Polymer Matrix Composites  

Science Conference Proceedings (OSTI)

Aluminum-fly Ash Composites Produced by Powder Metallurgy Processing · Characterisation of Al-AC8H/Al2O3p Metal Matrix Composites Produced by Stir ...

47

Non-Contact Printed Aluminum Metallization of Si Photovoltaic Devices: Preprint  

DOE Green Energy (OSTI)

Alternative solution-based techniques such as aerosol jet printing offer the dual benefits of contactless pattern deposition and high material utilization. We have used aerosol jet printing to investigate non-contact printed Al metal ink as a replacement for screen printed Al back contacts on wafer Si solar cells. This particle-based ink can be prepared at high loadings of 60 weight % metal, which enables rapid deposition of 1 - 10 um thick lines. Al lines printed on Si wafers and heated between 550 and 800 degrees C form low resistance contacts suitable for current extraction. The effectiveness of these printed Al back contacts has further been demonstrated by incorporating them into a series of 21 cm2 crystalline Si solar cells that produced a champion power conversion efficiency of 13%.

Platt, H. A. S.; van Hest, M. F. A. M.; Li, Y.; Novak, J. P.

2012-06-01T23:59:59.000Z

48

High performance metal/air fuel cells. Part 1. General review. [Li, Al, Ca, Cd, Mg  

SciTech Connect

Metal/air fuel cells are reviewed in terms of their potential application in electric vehicles. Attention is focused on those metals (light alkali and alkaline earth metals, and aluminum) which, in combination with oxygen, have theoretical energy densities (2--13 kWh/kg-metal) exceeding that of gasoline (utilized in automobiles at 2--3 kWh/kg). Lithium and aluminum have yielded 8- and 4 kWh/kg, respectively, in laboratory experimental cells. The slurry Zn/air system achieves 0.85 kWh/kg-Zn in prototype vehicle cells and is reviewed for comparison. Calcium can probably yield 1.8 kWh/kg-Ca, but its potential as a fuel has not yet been fully explored. The remaining metals appear to be unsuitable for use in aqueous electrolyte fuel cells. The discharge characteristics of lithium, aluminum, and (possibly) calcium/air cells indicate the potential for electric vehicles of the highway performance and minimum range (300 miles) of subcompact automobiles, rapid refueling for unlimited range extension, and the storage in the fuel cell of sufficient metal for ranges in excess of 1000 miles. Barriers to the concept are the economic necessity of recycling cell reaction products (except in the case of calcium), the expansion or creation of vast metal production industries, and the change-over of existing service station infrastructures to allow electric vehicle servicing. The energy efficiency of a transportation system using aluminum was estimated using data on the current aluminum production industry. The total estimated cost of ownership and operation of an aluminum/air cell was 3.0--3.6 cents/km. The relative rarity of lithium would complicate its use. 6 tables.

Cooper, J. F.

1977-08-15T23:59:59.000Z

49

Plutonium Immobilization Task 5.6 Metal Conversion: Milestone Report - Perform Feasibility Demonstrations on Pu-Al Alloys  

Science Conference Proceedings (OSTI)

The Plutonium Conversion Task within the Plutonium Immobilization Program (PIP) transforms incoming plutonium (Pu) feed materials into an oxide acceptable for blending with ceramic precursors. One of the feed materials originally planned for PIP was unirradiated fuel, which consisted mainly of the Zero Power Plutonium Reactor (ZPPR) fuel. Approximately 3.5 metric tons of Pu is in ZPPR fuel. The ZPPR fuel is currently stored at the Argonne National Laboratory-West as stainless steel clad metal plates and oxide pellets, with the vast majority of the Pu in the metal plates. The metal plates consist of a Pu-U-Mo alloy (containing 90% of the ZPPR plutonium metal) and a Pu-Al alloy (containing 10% of the ZPPR plutonium metal). The Department of Energy (DOE) decided that ZPPR fuel is a national asset and, therefore, not subject to disposition. This report documents work done prior to that decision. The Hydnde-Oxidation (HYDOX) Process was selected as the method for Metal Conversion in PIP because it provides a universal means for preparing oxide from all feed materials. HYDOX incorporates both the hydride process, originally developed to separate Pu from other pit materials, as well as the oxide formation step. Plutonium hydride is very reactive and is readily converted to either the nitride or the oxide. A previous feasibility study demonstrated that the Pu-U-Mo alloy could be successfully converted to oxide via the HYDOX Process. Another Metal Conversion milestone was to demonstrate the feasibility of the HYDOX Process for converting plutonium-aluminum (Pu-Al) alloy in ZPPR fuel plates to an acceptable oxide. This report documents the results of the latter feasibility study which was performed before the DOE decision to retain ZPPR fuel rather than immobilize it.

Zundelevich, Y; Kerns, J; Bannochie, C

2001-04-12T23:59:59.000Z

50

SP-29: Oxidation Behavior of Zr56Al16Co28 Metallic Glasses  

Science Conference Proceedings (OSTI)

Abstract Scope, The oxidation behavior of Zr56A16Co28 bulk metallic glass was ... A high resistance against oxidation in Zr56Al16Co28 bulk metallic glasses ...

51

TMS Short Course: Industrial Aluminum Electrolysis  

Science Conference Proceedings (OSTI)

... lower energy consumption, improve metal quality and reduce environmental ... Formerly Kaiser Aluminum; Halvor Kvande, Hydro Aluminium Primary Metal, ...

52

Characterisation of Al-AC8H/Al2O3p Metal Matrix Composites ...  

Science Conference Proceedings (OSTI)

Symposium, Metal and Polymer Matrix Composites ... Fabrication of Metal Matrix Composites via Spark Plasma Sintering for Nuclear Energy Application.

53

Synthesis and structural characterization of a new aluminum oxycarbonitride, Al{sub 5}(O, C, N){sub 4}  

SciTech Connect

A new aluminum oxycarbonitride, Al{sub 5}(O{sub x}C{sub y}N{sub 4-x-y}) (x{approx}1.4 and y{approx}2.1), has been synthesized and characterized by X-ray powder diffraction, transmission electron microscopy and electron energy loss spectroscopy (EELS). The title compound was found to be hexagonal with space group P6{sub 3}/mmc, Z=2, and unit-cell dimensions a=0.328455(6) nm, c=2.15998(3) nm and V=0.201805(6) nm{sup 3}. The atom ratios O:C:N were determined by EELS. The final structural model, which is isomorphous with that of (Al{sub 4.4}Si{sub 0.6})(O{sub 1.0}C{sub 3.0}), showed the positional disordering of one of the three types of Al sites. The maximum-entropy method-based pattern fitting (MPF) method was used to confirm the validity of the split-atom model, in which conventional structure bias caused by assuming intensity partitioning was minimized. The reliability indices calculated from the MPF were R{sub wp}=6.94% (S=1.22), R{sub p}=5.34%, R{sub B}=1.35% and R{sub F}=0.76%. The crystal was an inversion twin. Each twin-related individual was isostructural with Al{sub 5}C{sub 3}N (space group P6{sub 3}mc, Z=2). - Graphical abstract: A new oxycarbonitride discovered in the Al-O-C-N system, Al{sub 5}(O{sub 1.4}C{sub 2.1}N{sub 0.5}). The crystal is an inversion twin, and hence the structure is represented by a split-atom model. The three-dimensional electron density distributions are determined by the maximum-entropy methods-based pattern fitting, being consistent with the disordered structural model. Display Omitted

Inuzuka, Haruya; Kaga, Motoaki; Urushihara, Daisuke [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan); Nakano, Hiromi [Cooperative Research Facility Center, Toyohashi University of Technology, Toyohashi 441-8580 (Japan); Asaka, Toru [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan); Fukuda, Koichiro, E-mail: fukuda.koichiro@nitech.ac.j [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)

2010-11-15T23:59:59.000Z

54

Lithium-aluminum-iron electrode composition  

DOE Patents (OSTI)

A negative electrode composition is presented for use in a secondary electrochemical cell. The cell also includes an electrolyte with lithium ions such as a molten salt of alkali metal halides or alkaline earth metal halides that can be used in high-temperature cells. The cell's positive electrode contains a a chalcogen or a metal chalcogenide as the active electrode material. The negative electrode composition includes up to 50 atom percent lithium as the active electrode constituent in an alloy of aluminum-iron. Various binary and ternary intermetallic phases of lithium, aluminum and iron are formed. The lithium within the intermetallic phase of Al.sub.5 Fe.sub.2 exhibits increased activity over that of lithium within a lithium-aluminum alloy to provide an increased cell potential of up to about 0.25 volt.

Kaun, Thomas D. (Mokena, IL)

1979-01-01T23:59:59.000Z

55

Aluminum ION Battery  

•Lower cost because of abundant aluminum resources ... Li-ion battery (LiC 6 - Mn 2 O 4) 106 4.0 424 Al-ion battery (Al - Mn 2 O 4) 400 2.65 1,060

56

Electrometallurgical treatment of aluminum-based fuels.  

SciTech Connect

We have successfully demonstrated aluminum electrorefining from a U-Al-Si alloy that simulates spent aluminum-based reactor fuel. The aluminum product contains less than 200 ppm uranium. All the results obtained have been in agreement with predictions based on equilibrium thermodynamics. We have also demonstrated the need for adequate stirring to achieve a low-uranium product. Most of the other process steps have been demonstrated in other programs. These include uranium electrorefining, transuranic fission product scrubbing, fission product oxidation, and product consolidation by melting. Future work will focus on the extraction of active metal and rare earth fission products by a molten flux salt and scale-up of the aluminum electrorefining.

Willit, J. L.

1998-07-29T23:59:59.000Z

57

Al-Based Metallic Glass Incorporated Novel Ag Electrode for Si ...  

Science Conference Proceedings (OSTI)

... and good corrosion/oxidation resistances in the supercooled liquid state. ... Al- Based Metallic Glass Incorporated Novel Ag Electrode for Si Solar Cell ... Interfacial Free Energy and Local Order of Metallic Liquids from Elements to Alloys ... Predicting the Production of Glass Former Alloys by Mathematical Simulation of ...

58

The China Factor: Aluminum Industry Impact  

Science Conference Proceedings (OSTI)

... International Aluminium Institute, Japan Aluminium Association, South Korea Nonferrous Metals Association, and, for the first time, The Aluminum Association.

59

Aluminum Alloys: Fabrication, Characterization and Applications  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

60

Fatigue Resistance of Carbon Nanotube Reinforced Aluminum ...  

Science Conference Proceedings (OSTI)

Presentation Title, Fatigue Resistance of Carbon Nanotube Reinforced Aluminum ... Fatigue crack propagation (FCP) and fracture mechanism of Al-CNT  ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Wetting of Al2O3 by molten aluminum: the influence of BaSO4 additions  

Science Conference Proceedings (OSTI)

The effects of BaSO4 additions on the wetting of alumina by molten aluminum were studied by the sessile drop technique. To study the effect of BaSO4 decomposition (1100-1150°C), the additions were treated at two temperatures ...

Joaquin Aguilar-Santillan

2008-01-01T23:59:59.000Z

62

HIGH ENERGY DENSITY ALUMINUM BATTERY - Energy Innovation Portal  

Compositions and methods of making are provided for a high energy density aluminum battery. The battery comprises an anode comprising aluminum metal. The battery ...

63

Melter Testing with High Aluminum HLW Streams  

Hanford Tank Waste is High in Aluminum • Estimated Al inventory is 8750 MT • Problem: • Large fraction of Al is in the HLW solids • Greatly increases the ...

64

Crystal structure, characterization and thermoelectric properties of the type-I clathrate Ba{sub 8-y}Sr{sub y}Al{sub 14}Si{sub 32} (0.6{<=}y{<=}1.3) prepared by aluminum flux  

SciTech Connect

The title compound was prepared as single crystals using an aluminum flux technique. Single crystal and powder X-ray diffraction indicate that this composition crystallizes in the clathrate type-I structure, space group Pm3-bar n. Electron microprobe characterization indicates the composition to be Ba{sub 8-y}Sr{sub y}Al{sub 14.2(2)}Si{sub 31.8(2)} (0.77Al content fixed at the microprobe value (12 K data: R{sub 1}=0.0233, wR{sub 2}=0.0441) on a crystal of compositions Ba. The Sr atom preferentially occupies the 2a position; mixed Al/Si occupancy was found on all framework sites. These refinements are consistent with a fully occupied framework and nearly fully occupied cation guest sites as found by microprobe analysis. Temperature dependent electrical resistivity and thermal conductivity have been measured from room temperature to 1200 K on a hot-pressed pellet. Electrical resistivity reveals metallic behavior. The negative Seebeck coefficient indicates transport processes dominated by electrons as carriers. Thermal conductivity is between 22 and 25 mW/cm K. The sample shows n-type conductivity with a maximum figure of merit, zT of 0.3 at 1200 K. A single parabolic band model predicts a five-fold increase in zT at 800 K if carrier concentration is lowered. -- Graphical abstract: The inorganic type-I clathrate phase with nominal composition Ba{sub 7}Sr{sub 1}Al{sub 14}Si{sub 32} has been prepared by Al flux. Single crystal diffraction at 90 and 12 K reveal that the framework is fully occupied with the cation sites nearly fully occupied. The lattice thermal conductivity is low thereby suggesting further optimization of the carrier concentration will lead to a high zT. Display Omitted Highlights: {yields} Ba{sub 7}Sr{sub 1}Al{sub 14}Si{sub 32} is a light element phase ideal for thermoelectric power generation. {yields} Ba{sub 7}Sr{sub 1}Al{sub 14}Si{sub 32} is a high melting point cubic structure ideal for efficient power generation. {yields} The framework is fully occupied with the cation sites nearly fully occupied. {yields} Further optimization of the carrier concentration is expected to lead to a high zT.

Roudebush, John H. [Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616 (United States); Toberer, Eric S. [Materials Science, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States); Hope, Hakon [Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616 (United States); Jeffrey Snyder, G. [Materials Science, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States); Kauzlarich, Susan M., E-mail: smkauzlarich@ucdavis.ed [Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616 (United States)

2011-05-15T23:59:59.000Z

65

Synthesis and characterization of metal hydride/carbon aerogel composites for hydrogen storage  

Science Conference Proceedings (OSTI)

Two materials currently of interest for onboard lightweight hydrogen storage applications are sodium aluminum hydride (NaAlH4), a complex metal hydride, and carbon aerogels (CAs), a light porous material connected by several spherical nanoparticles. ...

Kuen-Song Lin; Yao-Jen Mai; Su-Wei Chiu; Jing-How Yang; Sammy L. I. Chan

2012-01-01T23:59:59.000Z

66

Erosion of Ferrous Alloys by Liquid Aluminum  

Science Conference Proceedings (OSTI)

... the degradation of ferrous alloys under the demands of liquid metal transfer conditions ... (by exposure to flowing aluminum) and response to thermal cycling (by cyclic exposure to static aluminum) ... 2008 Global Anode Effect Survey Results.

67

Aluminum nitride transitional layer for reducing dislocation density and cracking of AlGaN epitaxial films  

DOE Patents (OSTI)

A denticulated Group III nitride structure that is useful for growing Al.sub.xGa.sub.1-xN to greater thicknesses without cracking and with a greatly reduced threading dislocation (TD) density.

Allerman, Andrew A.; Crawford, Mary H.; Lee, Stephen R.

2013-01-08T23:59:59.000Z

68

CORROSION PROTECTION OF ALUMINUM  

DOE Patents (OSTI)

Treatment of aluminum-base metal surfaces in an autoclave with an aqueous chromic acid solution of 0.5 to 3% by weight and of pH below 2 for 20 to 50 hrs at 160 to 180 deg C produces an extremely corrosion-resistant aluminum oxidechromium film on the surface. A chromic acid concentration of 1 to 2% and a pH of about 1 are preferred. (D.C.W.)

Dalrymple, R.S.; Nelson, W.B.

1963-07-01T23:59:59.000Z

69

Mesoporous mixed metal oxides derived from P123-templated Mg-Al layered double hydroxides  

SciTech Connect

We report the preparation of mesoporous mixed metal oxides (MMOs) through a soft template method. Different amounts of P123 were used as structure directing agent to synthesize P123-templated Mg-Al layered double hydroxides (LDHs). After calcination of as-synthesized LDHs at 500 {sup o}C, the ordered mesopores were obtained by removal of P123. The mesoporous Mg-Al MMOs fabricated by using 2 wt% P123 exhibited a high specific surface area of 108.1 m{sup 2}/g, and wide distribution of pore size (2-18 nm). An investigation of the 'memory effect' of the mesoporous MMOs revealed that they were successfully reconstructed to ibuprofen intercalated LDHs having different gallery heights, which indicated different intercalation capacities. Due to their mesoporosity these unique MMOs have particular potential as drug or catalyst carriers. - Graphical abstract: Ordered mesoporous Mg-Al MMOs can be obtained through the calcination of P123-templated Mg-Al-CO{sub 3} LDHs. The pore diameter is 2.2 nm. At the presence of ibuprofen, the Mg-Al MMOs can recover to Mg-Al-IBU LDHs, based on its 'remember effect'. Display Omitted

Wang Jun, E-mail: zhqw1888@sohu.co [College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China); College of Chemical Engineering, Harbin Institute of Technology, Harbin 150001 (China); Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, 150001 (China); Zhou Jideng; Li Zhanshuang; He Yang; Lin Shuangshuang; Liu Qi [College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China); Zhang Milin [College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China); Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, 150001 (China); Jiang Zhaohua [College of Chemical Engineering, Harbin Institute of Technology, Harbin 150001 (China)

2010-11-15T23:59:59.000Z

70

Membrane Purification Cell for Aluminum Recycling  

Science Conference Proceedings (OSTI)

Recycling mixed aluminum scrap usually requires adding primary aluminum to the scrap stream as a diluent to reduce the concentration of non-aluminum constituents used in aluminum alloys. Since primary aluminum production requires approximately 10 times more energy than melting scrap, the bulk of the energy and carbon dioxide emissions for recycling are associated with using primary aluminum as a diluent. Eliminating the need for using primary aluminum as a diluent would dramatically reduce energy requirements, decrease carbon dioxide emissions, and increase scrap utilization in recycling. Electrorefining can be used to extract pure aluminum from mixed scrap. Some example applications include producing primary grade aluminum from specific scrap streams such as consumer packaging and mixed alloy saw chips, and recycling multi-alloy products such as brazing sheet. Electrorefining can also be used to extract valuable alloying elements such as Li from Al-Li mixed scrap. This project was aimed at developing an electrorefining process for purifying aluminum to reduce energy consumption and emissions by 75% compared to conventional technology. An electrolytic molten aluminum purification process, utilizing a horizontal membrane cell anode, was designed, constructed, operated and validated. The electrorefining technology could also be used to produce ultra-high purity aluminum for advanced materials applications. The technical objectives for this project were to: - Validate the membrane cell concept with a lab-scale electrorefining cell; - Determine if previously identified voltage increase issue for chloride electrolytes holds for a fluoride-based electrolyte system; - Assess the probability that voltage change issues can be solved; and - Conduct a market and economic analysis to assess commercial feasibility. The process was tested using three different binary alloy compositions (Al-2.0 wt.% Cu, Al-4.7 wt.% Si, Al-0.6 wt.% Fe) and a brazing sheet scrap composition (Al-2.8 wt.% Si-0.7 wt.% Fe-0.8 wt.% Mn),. Purification factors (defined as the initial impurity concentration divided by the final impurity concentration) of greater than 20 were achieved for silicon, iron, copper, and manganese. Cell performance was measured using its current and voltage characteristics and composition analysis of the anode, cathode, and electrolytes. The various cells were autopsied as part of the study. Three electrolyte systems tested were: LiCl-10 wt. % AlCl3, LiCl-10 wt. % AlCl3-5 wt.% AlF3 and LiF-10 wt.% AlF3. An extended four-day run with the LiCl-10 wt.% AlCl3-5 wt.% AlF3 electrolyte system was stable for the entire duration of the experiment, running at energy requirements about one third of the Hoopes and the conventional Hall-Heroult process. Three different anode membranes were investigated with respect to their purification performance and survivability: a woven graphite cloth with 0.05 cm nominal thickness & > 90 % porosity, a drilled rigid membrane with nominal porosity of 33%, and another drilled rigid graphite membrane with increased thickness. The latter rigid drilled graphite was selected as the most promising membrane design. The economic viability of the membrane cell to purify scrap is sensitive to primary & scrap aluminum prices, and the cost of electricity. In particular, it is sensitive to the differential between scrap and primary aluminum price which is highly variable and dependent on the scrap source. In order to be economically viable, any scrap post-processing technology in the U.S. market must have a total operating cost well below the scrap price differential of $0.20-$0.40 per lb to the London Metal Exchange (LME), a margin of 65%-85% of the LME price. The cost to operate the membrane cell is estimated to be aluminum. The energy cost is estimated to be $0.05/lb of purified aluminum with the remaining costs being repair and maintenance, electrolyte, labor, taxes and depreciation. The bench-scale work on membrane purification cell process has demonstrated technological advantages and subs

David DeYoung; James Wiswall; Cong Wang

2011-11-29T23:59:59.000Z

71

Membrane Purification Cell for Aluminum Recycling  

SciTech Connect

Recycling mixed aluminum scrap usually requires adding primary aluminum to the scrap stream as a diluent to reduce the concentration of non-aluminum constituents used in aluminum alloys. Since primary aluminum production requires approximately 10 times more energy than melting scrap, the bulk of the energy and carbon dioxide emissions for recycling are associated with using primary aluminum as a diluent. Eliminating the need for using primary aluminum as a diluent would dramatically reduce energy requirements, decrease carbon dioxide emissions, and increase scrap utilization in recycling. Electrorefining can be used to extract pure aluminum from mixed scrap. Some example applications include producing primary grade aluminum from specific scrap streams such as consumer packaging and mixed alloy saw chips, and recycling multi-alloy products such as brazing sheet. Electrorefining can also be used to extract valuable alloying elements such as Li from Al-Li mixed scrap. This project was aimed at developing an electrorefining process for purifying aluminum to reduce energy consumption and emissions by 75% compared to conventional technology. An electrolytic molten aluminum purification process, utilizing a horizontal membrane cell anode, was designed, constructed, operated and validated. The electrorefining technology could also be used to produce ultra-high purity aluminum for advanced materials applications. The technical objectives for this project were to: - Validate the membrane cell concept with a lab-scale electrorefining cell; - Determine if previously identified voltage increase issue for chloride electrolytes holds for a fluoride-based electrolyte system; - Assess the probability that voltage change issues can be solved; and - Conduct a market and economic analysis to assess commercial feasibility. The process was tested using three different binary alloy compositions (Al-2.0 wt.% Cu, Al-4.7 wt.% Si, Al-0.6 wt.% Fe) and a brazing sheet scrap composition (Al-2.8 wt.% Si-0.7 wt.% Fe-0.8 wt.% Mn),. Purification factors (defined as the initial impurity concentration divided by the final impurity concentration) of greater than 20 were achieved for silicon, iron, copper, and manganese. Cell performance was measured using its current and voltage characteristics and composition analysis of the anode, cathode, and electrolytes. The various cells were autopsied as part of the study. Three electrolyte systems tested were: LiCl-10 wt. % AlCl3, LiCl-10 wt. % AlCl3-5 wt.% AlF3 and LiF-10 wt.% AlF3. An extended four-day run with the LiCl-10 wt.% AlCl3-5 wt.% AlF3 electrolyte system was stable for the entire duration of the experiment, running at energy requirements about one third of the Hoopes and the conventional Hall-Heroult process. Three different anode membranes were investigated with respect to their purification performance and survivability: a woven graphite cloth with 0.05 cm nominal thickness & > 90 % porosity, a drilled rigid membrane with nominal porosity of 33%, and another drilled rigid graphite membrane with increased thickness. The latter rigid drilled graphite was selected as the most promising membrane design. The economic viability of the membrane cell to purify scrap is sensitive to primary & scrap aluminum prices, and the cost of electricity. In particular, it is sensitive to the differential between scrap and primary aluminum price which is highly variable and dependent on the scrap source. In order to be economically viable, any scrap post-processing technology in the U.S. market must have a total operating cost well below the scrap price differential of $0.20-$0.40 per lb to the London Metal Exchange (LME), a margin of 65%-85% of the LME price. The cost to operate the membrane cell is estimated to be < $0.24/lb of purified aluminum. The energy cost is estimated to be $0.05/lb of purified aluminum with the remaining costs being repair and maintenance, electrolyte, labor, taxes and depreciation. The bench-scale work on membrane purification cell process has demonstrated technological advantages and subs

David DeYoung; James Wiswall; Cong Wang

2011-11-29T23:59:59.000Z

72

PREPARATION OF ACTINIDE-ALUMINUM ALLOYS  

DOE Patents (OSTI)

BS>A process is given for preparing alloys of aluminum with plutonium, uranium, and/or thorium by chlorinating actinide oxide dissolved in molten alkali metal chloride with hydrochloric acid, chlorine, and/or phosgene, adding aluminum metal, and passing air and/or water vapor through the mass. Actinide metal is formed and alloyed with the aluminum. After cooling to solidification, the alloy is separated from the salt. (AEC)

Moore, R.H.

1962-09-01T23:59:59.000Z

73

Nondestructive detection of an undesirable metallic phase, T.sub.1, during processing of aluminum-lithium alloys  

DOE Patents (OSTI)

A method is disclosed for detecting the T.sub.1 phase in aluminum-lithium alloys through simultaneous measurement of conductivity and hardness. In employing eddy current to measure conductivity, when the eddy current decreases with aging of the alloy, while the hardness of the material continues to increase, the presence of the T.sub.1 phase may be detected.

Buck, Otto (Ames, IA); Bracci, David J. (Maryland Heights, MO); Jiles, David C. (Ames, IA); Brasche, Lisa J. H. (Nevada, IA); Shield, Jeffrey E. (Ames, IA); Chumbley, Leonard S. (Ames, IA)

1990-08-07T23:59:59.000Z

74

TMS Short Course: Industrial Aluminum Electrolysis  

Science Conference Proceedings (OSTI)

Since 1980 he has worked with Hydro Aluminum Metals Products in Ardal, ... energy balance, dynamic process simulation and experimental evaluation of cells.

75

Fatigue and Creep Properties of Al-Si Brazing Filler Metals  

Science Conference Proceedings (OSTI)

Jun 5, 2012 ... The manufacturing process for automotive heat exchangers involves brazing using an aluminum brazing sheet. To ensure structural strength ...

76

High resistivity aluminum antimonide radiation detector  

DOE Patents (OSTI)

Bulk Aluminum Antimonide (AlSb)-based single crystal materials have been prepared for use as ambient (room) temperature X-ray and Gamma-ray radiation detection.

Sherohman, John W. (Livermore, CA); Coombs, III, Arthur W. (Patterson, CA); Yee, Jick H. (Livermore, CA)

2007-12-18T23:59:59.000Z

77

Uniform Dispersion of Nanoparticles in Metal Matrix Nanocomposites  

Science Conference Proceedings (OSTI)

Conference Tools for 2012 TMS Annual Meeting & Exhibition ... Two examples are presented in this report: (1) uniform dispersion of Al2O3 nanoparticles in A206 ... Aluminum Metal Matrix Composite via Direct Metal Laser Deposition: Processing And Mechanical Characterization ... Contact programming@

78

RECOVERY OF ALUMINUM FROM FISSION PRODUCTS  

DOE Patents (OSTI)

A method is given for recovertng aluminum values from aqueous solutions containing said values together with fission products. A mixture of Fe/sub 2/O/ sub 3/ and MnO/sub 2/ is added to a solution containing aluminum and fission products. The resulting aluminum-containing supernatant is then separated from the fission product-bearing metal oxide precipitate and is contacted with a cation exchange resin. The aluminum sorbed on the resin is then eluted and recovered. (AEC)

Blanco, R.E.; Higgins, I.R.

1962-11-20T23:59:59.000Z

79

Aluminum I  

Science Conference Proceedings (OSTI)

Aug 6, 2013 ... Among them, automotive aluminum condensers are generally produced ... The brazing sheet used for the condenser is a three-layer composite ...

80

Extraction of trace metals from fly ash  

DOE Patents (OSTI)

A process for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous, the fly ash having a silicate base and containing surface deposits of the trace metals as oxides, chlorides or the like, with the process being carried out by contacting the fly ash with AlCl.sub.3 in an alkali halide melt to react the trace metals with the AlCl.sub.3 to form compositions soluble in the melt and a residue containing the silicate and aluminum oxide or other aluminum precipitate, and separating the desired trace metal or metals from the melt by electrolysis or other separation techniques.

Blander, Milton (Palos Park, IL); Wai, Chien M. (Moscow, ID); Nagy, Zoltan (Woodridge, IL)

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Extraction of trace metals from fly ash  

DOE Patents (OSTI)

A process is described for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous. The fly ash has a silicate base and contains surface deposits of the trace metals as oxides, chlorides or the like. The process is carried out by contacting the fly ash with AlCl/sub 3/ in an alkali halide melt to react the trace metals with the AlCl/sub 3/ to form compositions soluble in the melt and a residue containing the silicate and aluminum oxide or other aluminum precipitate, and separating the desired trace metal or metals from the melt by electrolysis or other separation techniques.

Blander, M.; Wai, C.M.; Nagy, Z.

1983-08-15T23:59:59.000Z

82

Regeneration of aluminum hydride  

DOE Patents (OSTI)

The present invention provides methods and materials for the formation of hydrogen storage alanes, AlH.sub.x, where x is greater than 0 and less than or equal to 6 at reduced H.sub.2 pressures and temperatures. The methods rely upon reduction of the change in free energy of the reaction between aluminum and molecular H.sub.2. The change in free energy is reduced by lowering the entropy change during the reaction by providing aluminum in a state of high entropy, and by increasing the magnitude of the change in enthalpy of the reaction or combinations thereof.

Graetz, Jason Allan; Reilly, James J; Wegrzyn, James E

2012-09-18T23:59:59.000Z

83

Regeneration of aluminum hydride  

DOE Green Energy (OSTI)

The present invention provides methods and materials for the formation of hydrogen storage alanes, AlH.sub.x, where x is greater than 0 and less than or equal to 6 at reduced H.sub.2 pressures and temperatures. The methods rely upon reduction of the change in free energy of the reaction between aluminum and molecular H.sub.2. The change in free energy is reduced by lowering the entropy change during the reaction by providing aluminum in a state of high entropy, by increasing the magnitude of the change in enthalpy of the reaction or combinations thereof.

Graetz, Jason Allan (Mastic, NY); Reilly, James J. (Bellport, NY)

2009-04-21T23:59:59.000Z

84

Effects of alkali-metal impurities on fracture toughness of 2090 Al-Li-Cu extrusions  

Science Conference Proceedings (OSTI)

The effects of alkali-metal impurity (AMI) content, temperature, and crack-mouth-opening displacement (CMOD) rate on the fracture toughness of 2090-T8 Al-Li-Cu alloy extrusions were studied, particularly for short-transverse (S-L) orientations. Decreasing AMI content resulted in increasing room-temperature fracture toughness, especially for underaged S-L and T-L specimens. Unlike most Al-Li based alloys, material with very low (AMIs produced by vacuum refining had a high S-L fracture toughness (up to 38 MPa{radical}m for proof strengths {approximately}440 MPa) as well as high toughness in other orientations. The increase in room-temperature fracture toughness with decreasing AMI content was associated with a decrease in the proportion o brittle intergranular and cleavage-like islands, and a corresponding increase in the proportion of high energy dimpled fracture modes, on fracture surfaces. Both the present and previous studies indicate that the brittle islands result from liquid-metal embrittlement due to the presence of discrete sodium-potassium rich liquid phases. For medium to high AMI contents (5 to 37 wt ppm), S-L fracture toughness increased with decreasing temperature due to solidification of these phases and a consequent decrease in the mobility of embrittling atoms. The ability of embrittling atoms to keep up with crack tips also depended on crack velocity so that CMOD rate influenced fracture toughness. The grain structure (degree of recrystallization) appeared to be another important parameter affecting fracture toughness.

Sweet, E.D.; Bennett, C.G.; Musulin, I. [Comalco Research Centre, Thomastown, Victoria (Australia); Lynch, S.P.; Nethercott, R.B. [Defence Science and Technology Organisation, Melbourne, Victoria (Australia)

1996-11-01T23:59:59.000Z

85

FILM GROWTH ON ALUMINUM IN HIGH-TEMPERATURE WATER  

DOE Green Energy (OSTI)

Film growths on aluminum and two aluminum-1 wt.% nickel alloys in water at 250 and 350 deg C were studied. It was found that oxide growth does not advance on a uniform front but, to the contrary, the advancing surface contains many outcrops in the form of thin platelets, chunky outcrops, and whiskers. With both the pure metal and the alloys considerable intergranular attack was observed. The general corrosion product was usually more uniform in crystal size when formed on the pure metal, but variations in crystal size were observed on both aluminum and alloys with varying features of the metal surface. The roughness of the general oxide surface (includlng outcrops) was found to increase rapidly to about 0.2 micron and then remain relatively constant with increasing film thickness. The composition of films formed under all investigated conditions, except one, was found to be boehmite ( alpha -Al/sub 2/O/sub 3/- H/sub 2/O). This exception was films carried by the alloy specimens after testing for 32 days at 350 deg C. In this case the main corrosion film was still boehmite, but in addition the outer surface supported long needles of diaspore ( beta -Al/sub 2/ O/sub 3/- H/sub 2/O). (auth)

Hart, R.K.; Ruther, W.E.

1961-04-01T23:59:59.000Z

86

Erroneous Wave Functions of Ciuchi et al for Collective Modes in Neutron Production on Metallic Hydride Cathodes  

E-Print Network (OSTI)

There is a recent comment (Ciuchi et al., 2012) concerning the theory of collective many body effects on the neutron production rates in a chemical battery cathode. Ciuchi et al employ an inverse beta decay expression that contains a two body amplitude. Only one electron and one proton may exist in the Ciuchi et al model initial state wave function. A flaw in their reasoning is that one cannot in reality describe collective many body correlations with only a two particle wave function. One needs very many particles to describe collective effects. In the model wave functions of Ciuchi et al there are no metallic hydrides, there are no cathodes and there are no chemical batteries. Employing a wave function with only one electron and one proton is inadequate for describing collective metallic hydride surface quantum plasma physics in cathodes accurately.

A. Widom; Y. N. Srivastava; L. Larsen

2012-10-17T23:59:59.000Z

87

Activated aluminum hydride hydrogen storage compositions and uses thereof  

DOE Patents (OSTI)

In one aspect, the invention relates to activated aluminum hydride hydrogen storage compositions containing aluminum hydride in the presence of, or absence of, hydrogen desorption stimulants. The invention particularly relates to such compositions having one or more hydrogen desorption stimulants selected from metal hydrides and metal aluminum hydrides. In another aspect, the invention relates to methods for generating hydrogen from such hydrogen storage compositions.

Sandrock, Gary (Ringwood, NJ); Reilly, James (Bellport, NY); Graetz, Jason (Mastic, NY); Wegrzyn, James E. (Brookhaven, NY)

2010-11-23T23:59:59.000Z

88

Light Metals 2010  

Science Conference Proceedings (OSTI)

Feb 1, 2010 ... Softcover book: Light Metals 2008 Volume 2: Aluminum Reduction. Hardcover book and CD-ROM: Light Metals 2009 ...

89

Recipients: The 1998 LMD Light Metals Subject Area PaperAward  

Science Conference Proceedings (OSTI)

Halvor Kvande, Hydro Aluminium Metals Technology Bjorn P. Moxness, Hydro Aluminum Jorn.Skaar, Norge Aluminum Per A. Solli,, Hydro Aluminum ...

90

Electrolyte treatment for aluminum reduction  

DOE Patents (OSTI)

A method of treating an electrolyte for use in the electrolytic reduction of alumina to aluminum employing an anode and a cathode, the alumina dissolved in the electrolyte, the treating improving wetting of the cathode with molten aluminum during electrolysis. The method comprises the steps of providing a molten electrolyte comprised of ALF.sub.3 and at least one salt selected from the group consisting of NaF, KF and LiF, and treating the electrolyte by providing therein 0.004 to 0.2 wt. % of a transition metal or transition metal compound for improved wettability of the cathode with molten aluminum during subsequent electrolysis to reduce alumina to aluminum.

Brown, Craig W. (Seattle, WA); Brooks, Richard J. (Seattle, WA); Frizzle, Patrick B. (Seattle, WA); Juric, Drago D. (Bulleen, AU)

2002-01-01T23:59:59.000Z

91

Mechanical Properties of Al-Ni-Zr Bulk Metallic Glasses Interpreted ...  

Science Conference Proceedings (OSTI)

Symposium, M. Bulk Metallic Glasses, Nanocrystalline Materials, and ... Application of Metallic Glass for High Performance Si Solar Cell: Oxidation Behavior of ...

92

Crack-resistance Curve of a Zr-Ti-Cu-Al Bulk Metallic Glass with ...  

Science Conference Proceedings (OSTI)

Symposium, M. Bulk Metallic Glasses, Nanocrystalline Materials, and ... Application of Metallic Glass for High Performance Si Solar Cell: Oxidation Behavior of ...

93

PRODUCTION OF PLUTONIUM METAL  

DOE Patents (OSTI)

A process is given for producing plutonium metal by the reduction of plutonium chloride, dissolved in alkali metal chloride plus or minus aluminum chloride, with magnesium or a magnesium-aluminum alloy at between 700 and 800 deg C and separating the plutonium or plutonium-aluminum alloy formed from the salt.

Lyon, W.L.; Moore, R.H.

1961-01-17T23:59:59.000Z

94

XRD and NMR investigation of Ti-compound formation in solution-doping of sodium aluminum hydrides: Solubility of Ti in NaAlH4 crystals grown in THF  

DOE Green Energy (OSTI)

Sodium aluminum hydrides have gained attention due to their high hydrogen weight percent (5.5% ideal) compared to interstitial hydrides, and as a model for hydrides with even higher hydrogen weight fraction. The purpose of this paper is to investigate the Ti-compounds that are formed under solution-doping techniques, such as wet doping in solvents such as tetrahydrofuran (THF). Compound formation in Ti-doped sodium aluminum hydrides is investigated using x-ray diffraction (XRD) and magic angle spinning (MAS) nuclear magnetic resonance (NMR). We present lattice parameter measurements of crushed single crystals, which were exposed to Ti during growth. Rietveld refinements indicate no lattice parameter change and thus no solubility for Ti in NaAlH{sub 4} by this method of exposure. In addition, x-ray diffraction data indicate that no Ti substitutes in NaH, the final decomposition product for the alanate. Reaction products of completely reacted (33.3 at. %-doped) samples that were solvent-mixed or mechanically milled are investigated. Formation of TiAl{sub 3} is observed in mechanically milled materials, but not solution mixed samples, where bonding to THF likely stabilizes Ti-based nano-clusters. The Ti in these clusters is activated by mechanical milling.

Majzoub, E H; Herberg, J L; Stumpf, R; Spangler, S; Maxwell, R S

2004-08-26T23:59:59.000Z

95

Amorphous Al-transition Metal Alloys as Anode Material for Lithium Ion Battery  

E-Print Network (OSTI)

Al based alloy powders (Al??Ni?Y?Co?Fe?) are produced by spray atomization method. High energy ball milling is done to modify the surface topology and particle size for better electrochemical performance. X ray diffraction ...

Wang, C.Y.

96

Method of forming aluminum oxynitride material and bodies formed by such methods  

DOE Patents (OSTI)

Methods of forming aluminum oxynitride (AlON) materials include sintering green bodies comprising aluminum orthophosphate or another sacrificial material therein. Such green bodies may comprise aluminum, oxygen, and nitrogen in addition to the aluminum orthophosphate. For example, the green bodies may include a mixture of aluminum oxide, aluminum nitride, and aluminum orthophosphate or another sacrificial material. Additional methods of forming aluminum oxynitride (AlON) materials include sintering a green body including a sacrificial material therein, using the sacrificial material to form pores in the green body during sintering, and infiltrating the pores formed in the green body with a liquid infiltrant during sintering. Bodies are formed using such methods.

Bakas, Michael P. (Ammon, ID); Lillo, Thomas M. (Idaho Falls, ID); Chu, Henry S. (Idaho Falls, ID)

2010-11-16T23:59:59.000Z

97

SOLID STATE BONDING OF THORIUM WITH ALUMINUM  

DOE Patents (OSTI)

A method is described for bonding thorium and aluminum by placing clean surfaces of thorium and aluminum in contact with each other and hot pressing the metals together in a protective atmosphere at a temperature of about 375 to 575 deg C and at a pressure of at least 10 tsi to effect a bond.

Storchhelm, S.

1959-12-01T23:59:59.000Z

98

Al K-edge near-edge X-ray absorption fine structure (NEXAFS) study on the coordination structure of aluminum in minerals and Y zeolites  

Science Conference Proceedings (OSTI)

Curved-wave-multiple-scattering cluster calculations with the FEFF6 code were used to interpret experimental AlK-edge near-edge X-ray absorption fine structure (NEXAFS) spectra of various minerals and Y zeolites for energies {approximately}15 eV above threshold. Octahedral, tetrahedral, and square planar geometries of Al can be easily distinguished from each other utilizing characteristic features in the NEXAFS data. NEXAFS line shapes are used for determining the geometrical conformations of Al atoms in Y zeolites with one or more conformational geometries. In the H-Y zeolite, separate contributions to the NEXAFS from tetrahedrally and octahedrally coordinated Al atoms are identified. The differences in the octahedrally coordinated Al spectra in the H-Y zeolite compared with spectra for standard octahedrally coordinated Al compounds can be attributed to the presence of very small nonregular clusters of octahedrally coordinated Al dispersed over the zeolite. However, the presence of some pentacoordinated Al cannot be excluded.

Bokhoven, J.A. van; Sambe, H.; Ramaker, D.E. [George Washington Univ., Washington, DC (United States). Chemistry Dept.; Koningsberger, D.C. [Utrecht Univ. (Netherlands)

1999-09-09T23:59:59.000Z

99

THE DIFFUSION OF LITHIUM IN ALUMINUM  

SciTech Connect

The diffusion of lithium in aluminum was measured at various temperatures with diffusion couples of aluminum-LiAl. The activation energy, E, is 33.3 kcal/mol, and the diffusion factor, Do, is 4.5 cm{sup2}/sec. (auth)

Costas, L. P.

1963-02-28T23:59:59.000Z

100

For cermet inert anode containing oxide and metal phases useful for the electrolytic production of metals  

DOE Patents (OSTI)

A cermet inert anode for the electrolytic production of metals such as aluminum is disclosed. The inert anode comprises a ceramic phase including an oxide of Ni, Fe and M, where M is at least one metal selected from Zn, Co, Al, Li, Cu, Ti, V, Cr, Zr, Nb, Ta, W, Mo, Hf and rare earths, preferably Zn and/or Co. Preferred ceramic compositions comprise Fe.sub.2 O.sub.3, NiO and ZnO or CoO. The cermet inert anode also comprises a metal phase such as Cu, Ag, Pd, Pt, Au, Rh, Ru, Ir and/or Os. A preferred metal phase comprises Cu and Ag. The cermet inert anodes may be used in electrolytic reduction cells for the production of commercial purity aluminum as well as other metals.

Ray, Siba P. (Murrysville, PA); Liu, Xinghua (Monroeville, PA); Weirauch, Douglas A. (Murrysville, PA)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

SPG-19: Fabrication and Characterization of Nanoporous Aluminum ...  

Science Conference Proceedings (OSTI)

1 wt% aqueous solution of nitric acid (HNO3) was used to selectively remove zinc ... Characterization of Nanoporous Aluminum via Selective Dissolution of Al-Zn ...

102

Fabrication of Nanostructural Aluminum Alloy Powder with Ball ...  

Science Conference Proceedings (OSTI)

The aim of this paper is to fabricate aluminum alloy powder with nanostructure using ball milling method. The commercial Al-Mg-Cu alloy powder was milled ...

103

Cast Shop for Aluminum Production - Programmaster.org  

Science Conference Proceedings (OSTI)

Jul 31, 2012 ... Advanced Compact Filter: ( ACF) An Efficient and Flexible Filtration Process · AlTi5B1 Grain Refiners on the Casting of DIN 226 Aluminum ...

104

Scaleable Clean Aluminum Melting Systems  

Science Conference Proceedings (OSTI)

The project entitled 'Scaleable Clean Aluminum Melting Systems' was a Cooperative Research and Development Agreements (CRADAs) between Oak Ridge National Laboratory (ORNL) and Secat Inc. The three-year project was initially funded for the first year and was then canceled due to funding cuts at the DOE headquarters. The limited funds allowed the research team to visit industrial sites and investigate the status of using immersion heaters for aluminum melting applications. Primary concepts were proposed on the design of furnaces using immersion heaters for melting. The proposed project can continue if the funding agency resumes the funds to this research. The objective of this project was to develop and demonstrate integrated, retrofitable technologies for clean melting systems for aluminum in both the Metal Casting and integrated aluminum processing industries. The scope focused on immersion heating coupled with metal circulation systems that provide significant opportunity for energy savings as well as reduction of melt loss in the form of dross. The project aimed at the development and integration of technologies that would enable significant reduction in the energy consumption and environmental impacts of melting aluminum through substitution of immersion heating for the conventional radiant burner methods used in reverberatory furnaces. Specifically, the program would couple heater improvements with furnace modeling that would enable cost-effective retrofits to a range of existing furnace sizes, reducing the economic barrier to application.

Han, Q.; Das, S.K. (Secat, Inc.)

2008-02-15T23:59:59.000Z

105

Corrosion and Cytotoxicity of a Ni-free Zr-Al-Fe-Cu Bulk Metallic Glass  

Science Conference Proceedings (OSTI)

Corrosion resistance was studied using polarization technique in phosphate buffered saline solution ... Cell viability, adhesion, morphology, and proliferation of osteoblasts, endothelial cells and .... Joining of Active Bulk Metallic Glasses in Air.

106

C-V characteristics of epitaxial germanium metal-oxide-semiconductor capacitor on GaAs substrate with ALD Al2O3 dielectric  

Science Conference Proceedings (OSTI)

Epitaxial germanium metal-oxide-semiconductor capacitors (MOSCAP) were fabricated on GaAs substrate using atomic layer deposited Al"2O"3 gate dielectric with surface treatments including pure HF and HF plus rapid thermal oxidation (RTO). The electrical ... Keywords: ALD Al2O3, CMOS integration, Ge MOSCAP, Ge epitaxial film, RTO

Shih Hsuan Tang; Chien I. Kuo; Hai Dang Trinh; Mantu Hudait; Edward Yi Chang; Ching Yi Hsu; Yung Hsuan Su; Guang-Li Luo; Hong Quan Nguyen

2012-09-01T23:59:59.000Z

107

Aluminum 2004  

Science Conference Proceedings (OSTI)

Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA. 01923 USA ... A Publication of TMS (The Minerals, Metals & Materials Society). 184 Thorn Hill Road.

108

Aluminum Coatings  

Science Conference Proceedings (OSTI)

...and furnaces Fire and garage doors Kitchen and laundry appliances Metal buildings Agricultural equipment Silo roofs Playground equipment Outdoor furniture Signs, masts, and lighting fixtures Containers and wrappers...

109

Atomic transport at liquid metal/Al{sub 2}O{sub 3} interfaces  

SciTech Connect

In this work, atomic force microscopy (AFM) has been used to identify the controlling transport mechanisms at metal/oxide interfaces and measure the corresponding diffusivities. Interfacial transport rates in our experiments are two to four orders of magnitude faster than any previously reported rates for the oxide surface. The interfacial diffusivities and the degree of interfacial anisotropy depend on the oxygen activity of the system. Atomic transport at metal/oxide interfaces plays a defining role in many technological processes, and these experiments provide fundamental data for the formulation of the atomic theory needed to explain many of the observed phenomena.

Saiz, Eduardo; Cannon, Rowland M.; Tomsia, Antoni P.

2000-10-12T23:59:59.000Z

110

Aluminum in Transportation  

Science Conference Proceedings (OSTI)

Presentation Title, Aluminum in Transportation: Case Study of the Development of a ... The unit was entirely redesigned using aluminum and based on the future

111

Recycling - Aluminum - TMS  

Science Conference Proceedings (OSTI)

Life Cycle Inventory Report for the North American Aluminum Industry Document providing the life cycle information for the North American aluminum industry.

112

Corrosion protective coating for metallic materials  

DOE Patents (OSTI)

Corrosion protective coatings for metallic materials, particularly aluminum and aluminum alloys, produced with simple, low-cost equipment and materials other than toxic metals or metal salts, or metal cyanides. The metallic material is cleaned, degreased, and deoxidized, the surface is converted to a substantially alkaline condition, and the surface is chemically sealed with inorganic metal compounds.

Buchheit, Rudolph G. (Albuquerque, NM); Martinez, Michael A. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

113

Accelerated lifetime estimation of thermosonic Cu ball bonds on Al metallization  

Science Conference Proceedings (OSTI)

In this study a fast mechanical shear fatigue test technique for the quality assessment of thermosonic ball bonded interconnects was developed to estimate their lifetime behavior. The micro-interconnects were subjected to cyclic shear stress using a ... Keywords: Cu/Al Ball bond, Fatigue, Fracture mechanics, Lifetime, Microelectronic interconnects

A. Lassnig, W. Trasischker, G. Khatibi, B. Weiss, M. Nelhiebel, R. Pelzer

2013-06-01T23:59:59.000Z

114

Recipients: The 1998 LMD Light Metals Award  

Science Conference Proceedings (OSTI)

Paper Title: "Coalescence Behaviour of Aluminum Droplets under Molten Salt Flux Cover," in Light Metals 1997, edited by Barry Welch.

115

Aluminum-fly ash metal matrix composites for automotive parts. [Reports for October 1 to December 31, 1999, and January 1 - to March 31, 2000  

Science Conference Proceedings (OSTI)

The highlights of this report are: (1) fly ash classified by less than 100 microns in size was mixed into a 300 lb melt of alloy 535 without the need of a magnesium additive; (2) a vibratory feeder fitted with a sieve was used as the means to minimize particle clustering while introducing fly ash into the aluminum alloy 535 melt; and (3) the industrial-size field test was successful in that sand mold castings and permanent mold castings of tensile bars, K mold bars, and ingots were made from aluminum alloy 535-fly ash mix. Use of aluminum alloy 535 containing 7% magnesium precluded the need to introduce additional magnesium into the melt. The third round of sand mold castings as well as permanent mold castings produced components and ingots of alloy 535 instead of alloy 356. The ingots will be remelted and cast into parts to assess the improvement of flyash distribution which occurs through reheating and the solidification wetting process. Microstructure analysis continues on sand and permanent mold castings to study particle distribution in the components. A prototype sand cast intake manifold casting was found to be pressure tight which is a major performance requirement for this part. Another heat of pressure die cast brackets of A380-classified fly ash will be made to examine their strength and fly ash distribution. Ingots of A356-fly ash have been made at Eck for remelting at Thompson Aluminum for squeeze casting into motor mounts.

Weiss, David; Purgert, Robert; Rhudy, Richard; Rohatgi, Pradeep

2000-04-21T23:59:59.000Z

116

Aluminum II  

Science Conference Proceedings (OSTI)

Aug 6, 2013 ... The thermodynamic modelling is carried out for forecasting of oxidation products in the interaction of Al-Nb alloys with CaO2, CaCO3, Na2SO4 ...

117

Dry lubricant films for aluminum forming.  

DOE Green Energy (OSTI)

During metal forming process, lubricants are crucial to prevent direct contact, adhesion, transfer and scuffing of workpiece materials and tools. Boric acid films can be firmly adhered to the clean aluminum surfaces by spraying their methanol solutions and provide extremely low friction coefficient (about 0.04). The cohesion strengths of the bonded films vary with the types of aluminum alloys (6061, 6111 and 5754). The sheet metal forming tests indicate that boric acid films and the combined films of boric acid and mineral oil can create larger strains than the commercial liquid and solid lubricants, showing that they possess excellent lubricities for aluminum forming. SEM analyses indicate that boric acid dry films separate the workpiece and die materials, and prevent their direct contact and preserve their surface qualities. Since boric acid is non-toxic and easily removed by water, it can be expected that boric acid films are environmentally friendly, cost effective and very efficient lubricants for sheet aluminum cold forming.

Wei, J.; Erdemir, A.; Fenske, G. R.

1999-03-30T23:59:59.000Z

118

Nanostructured lithium-aluminum alloy electrodes for lithium-ion batteries.  

DOE Green Energy (OSTI)

Electrodeposited aluminum films and template-synthesized aluminum nanorods are examined as negative electrodes for lithium-ion batteries. The lithium-aluminum alloying reaction is observed electrochemically with cyclic voltammetry and galvanostatic cycling in lithium half-cells. The electrodeposition reaction is shown to have high faradaic efficiency, and electrodeposited aluminum films reach theoretical capacity for the formation of LiAl (1 Ah/g). The performance of electrodeposited aluminum films is dependent on film thickness, with thicker films exhibiting better cycling behavior. The same trend is shown for electron-beam deposited aluminum films, suggesting that aluminum film thickness is the major determinant in electrochemical performance regardless of deposition technique. Synthesis of aluminum nanorod arrays on stainless steel substrates is demonstrated using electrodeposition into anodic aluminum oxide templates followed by template dissolution. Unlike nanostructures of other lithium-alloying materials, the electrochemical performance of these aluminum nanorod arrays is worse than that of bulk aluminum.

Hudak, Nicholas S.; Huber, Dale L.

2010-12-01T23:59:59.000Z

119

Synthesis and structural characterization of Al{sub 7}C{sub 3}N{sub 3}-homeotypic aluminum silicon oxycarbonitride, (Al{sub 7-x}Si{sub x})(O{sub y}C{sub z}N{sub 6-y-z}) (x{approx}1.2, y{approx}1.0 and z{approx}3.5)  

SciTech Connect

A new aluminum silicon oxycarbonitride, (Al{sub 5.8}Si{sub 1.2})(O{sub 1.0}C{sub 3.5}N{sub 1.5}), has been synthesized and characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and electron energy loss spectroscopy (EELS). The title compound is hexagonal with space group P6{sub 3}/mmc and unit-cell dimensions a=0.322508(4) nm, c=3.17193(4) nm and V=0.285717(6) nm{sup 3}. The atom ratios of Al:Si and those of O:C:N were, respectively, determined by EDX and EELS. The initial structural model was successfully derived from the XRPD data by the direct methods and further refined by the Rietveld method. The crystal is most probably composed of four types of domains with nearly the same fraction, each of which is isotypic to Al{sub 7}C{sub 3}N{sub 3} with space group P6{sub 3}mc. The existence of another new oxycarbonitride (Al{sub 6.6}Si{sub 1.4})(O{sub 0.7}C{sub 4.3}N{sub 2.0}), which must be homeotypic to Al{sub 8}C{sub 3}N{sub 4}, has been also demonstrated by XRPD and TEM. - Graphical abstract: A new oxycarbonitride discovered in the Al-Si-O-C-N system, (Al{sub 7-x}Si{sub x})(O{sub y}C{sub z}N{sub 6-y-z}) (x{approx}1.2, y{approx}1.0 and z{approx}3.5). The crystal is composed of four types of domains (I, II, III and IV), and hence the structure is represented by a split-atom model. Individual crystal structures can be regarded as layered structures, which consist of A-type [(Al, Si){sub 4}(O, C, N){sub 4}] unit layers and B-type [(Al, Si)(O, C, N){sub 2}] single layers. Highlights: > (Al{sub 5.8}Si{sub 1.2})(O{sub 1.0}C{sub 3.5}N{sub 1.5}) as a new aluminum silicon oxycarbonitride. > Crystal structure is determined and represented by a split-atom model. > Existence of another new oxycarbonitride (Al{sub 6.6}Si{sub 1.4})(O{sub 0.7}C{sub 4.3}N{sub 2.0}) is demonstrated. > Both new materials are formed by oxidation and nitridation of (Al, Si){sub 6}(O, C){sub 5}.

Urushihara, Daisuke; Kaga, Motoaki; Asaka, Toru [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan); Nakano, Hiromi [Cooperative Research Facility Center, Toyohashi University of Technology, Toyohashi 441-8580 (Japan); Fukuda, Koichiro, E-mail: fukuda.koichiro@nitech.ac.jp [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)

2011-08-15T23:59:59.000Z

120

Electrochemical study of Aluminum-Fly Ash composites obtained by powder metallurgy  

Science Conference Proceedings (OSTI)

In this paper, two different ASTM C 618 Class C fly ashes (FA) were used for the production of aluminum metal matrix composites (MMCs) using powder metallurgy (PM) technology. Calcareous FAs were sampled from the electrostatic precipitators of two different lignite-fired power stations: from Megalopolis, Southern Greece (MFA) and from Kardia, Northen Greece (KFA), under maximum electricity load. FAs were milled in order to reduce the mean particle diameter and Aluminum-FA composites containing 10% and 20% of FA were then prepared and compacted. The green products were sintered for 2 h at 600 Degree-Sign C. Sintered Al-FA MMCs showed increased hardness and wear resistance suggesting their possible use in industrial applications for example in covers, casings, brake rotors or engine blocks. As most possible industrial applications of MMCs not only require wear resistance, but also corrosion resistance in different mild aggressive medias, this paper aims to study the electrochemical behavior of FA MMCs in order to evaluate their corrosion resistance. The morphology and chemical composition of the phases in the Aluminum-FA composite samples were investigated using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDXS). Moreover, topographic and Volta potential maps were acquired by Scanning Kelvin Probe Force Microscopy (SKP-FM). Volta potential maps provide information about the electrochemical behavior of the different phases in absence of electrolyte. The electrochemical behavior was investigated by Open Circuit Potential measurements and potentiodynamic polarization, while the corrosion mechanisms were studied by SEM observations after different times of immersion in a mild corrosive medium. In all cases it could be stated that the addition of the FA particles into the Al matrix might cause an increase of the hardness and mechanical properties of the pure aluminum but deteriorates the corrosion resistance. The degradation phenomena occurring on the FA containing samples might be related to the following mechanisms: 1) Partial detachment or dissolution of the FA soluble phases, in particular based on Si, Fe and Ca; 2) dissolution of the Al matrix surrounding the FA particles due to crevice corrosion; 3) Al localized dissolution due to galvanic coupling between the Fe-rich intermetallics and the matrix. - Highlights: Black-Right-Pointing-Pointer Aluminum metal matrix composites containing two types of fly ashes have been characterized. Black-Right-Pointing-Pointer The microstructure and the electrochemical behavior have been studied using different techniques. Black-Right-Pointing-Pointer The addition of FA deteriorates the corrosion resistance of the aluminum. Black-Right-Pointing-Pointer Degradation mechanisms: galvanic coupling, crevice corrosion, detachment of FA particles.

Marin, E. [Department of Chemistry, Physics and Environment, University of Udine, Via Cotonificio 108, 33100, Udine (Italy); Lekka, M., E-mail: maria.lekka@uniud.it [Department of Chemistry, Physics and Environment, University of Udine, Via Cotonificio 108, 33100, Udine (Italy); Andreatta, F.; Fedrizzi, L. [Department of Chemistry, Physics and Environment, University of Udine, Via Cotonificio 108, 33100, Udine (Italy); Itskos, G. [School of Chemical Engineering, National Technical University of Athens, Iroon Polytechneiou 9, Zografou 15780, Athens (Greece); Centre for Research and Technology Hellas/Institute for Solid Fuels Technology and Applications, Mesogeion Avenue 357-359, Halandri 15231, Athens (Greece); Moutsatsou, A. [School of Chemical Engineering, National Technical University of Athens, Iroon Polytechneiou 9, Zografou 15780, Athens (Greece); Koukouzas, N. [Centre for Research and Technology Hellas/Institute for Solid Fuels Technology and Applications, Mesogeion Avenue 357-359, Halandri 15231, Athens (Greece); Kouloumbi, N. [School of Chemical Engineering, National Technical University of Athens, Iroon Polytechneiou 9, Zografou 15780, Athens (Greece)

2012-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Similarities and differences in the microstructure of attritor-milled Fe-Al-N compositions  

Science Conference Proceedings (OSTI)

Although numerous studies of high-energy, ball-milled metal powders have been conducted, to date few studies have characterized the mechanical processing of identical elemental compositions of prealloyed powders and of powder blends. This study reports on the mechanical processing (attritor ball milling) in argon and nitrogen gas environments of (a) iron powder and prealloyed iron–2 wt.% aluminum powder, and (b) iron-aluminum, iron-aluminum nitride, and iron-iron nitride powder blends. When nitrogen was milled into iron particles either from nitride powder or by gas infusion, the nitrogen dissolved interstitially in bcc-Fe (principally at the grain boundaries) or was present as bct-Fe nanoparticles at the bcc-Fe nanograin boundaries. The resulting nitrogen distribution was independent of how the nitrogen was added. Milled blends of iron and aluminum powder and prealloyed iron-aluminum powder resulted in similar microstructures: micrometer size particles with similar nanograin size. The aluminum in the blended powder mixture developed an ultrafine distribution on the grain boundaries, but it did not become uniformly distributed within the bcc-Fe grains. In contrast, the aluminum in prealloyed Fe–Al powder remained in solid solution during the mechanical milling.

Rawers, J.C.; Cook, D.C. (Old Dominion U., Norfolk, VA)

1997-04-01T23:59:59.000Z

122

Aluminum Fluoride – A Users Guide  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Aluminum Reduction Technology. Presentation Title, Aluminum Fluoride – A ...

123

Aluminum Reduction Technology  

Science Conference Proceedings (OSTI)

Increasing the Power Modulation Window of Aluminium Smelter Pots with Shell Heat Exchanger Technology · Initiatives To Reduction Of Aluminum Potline ...

124

Aluminum Reduction Technology  

Science Conference Proceedings (OSTI)

Jul 31, 2011 ... GHG Measurement and Inventory for Aluminum Production · HEX Retrofit Enables Smelter Capacity Expansion · HF Emission Reduction from ...

125

Electrolytic production of high purity aluminum using inert anodes  

DOE Patents (OSTI)

A method of producing commercial purity aluminum in an electrolytic reduction cell comprising inert anodes is disclosed. The method produces aluminum having acceptable levels of Fe, Cu and Ni impurities. The inert anodes used in the process preferably comprise a cermet material comprising ceramic oxide phase portions and metal phase portions.

Ray, Siba P. (Murrysville, PA); Liu, Xinghua (Monroeville, PA); Weirauch, Jr., Douglas A. (Murrysville, PA)

2001-01-01T23:59:59.000Z

126

Electrolytic production of high purity aluminum using ceramic inert anodes  

DOE Patents (OSTI)

A method of producing commercial purity aluminum in an electrolytic reduction cell comprising ceramic inert anodes is disclosed. The method produces aluminum having acceptable levels of Fe, Cu and Ni impurities. The ceramic inert anodes used in the process may comprise oxides containing Fe and Ni, as well as other oxides, metals and/or dopants.

Ray, Siba P. (Murrysville, PA); Liu, Xinghua (Monroeville, PA); Weirauch, Douglas A. (Murrysville, PA); DiMilia, Robert A. (Baton Rouge, LA); Dynys, Joseph M. (New Kensington, PA); Phelps, Frankie E. (Apollo, PA); LaCamera, Alfred F. (Trafford, PA)

2002-01-01T23:59:59.000Z

127

Synthesis and structural characterization of Al{sub 4}Si{sub 2}C{sub 5}-homeotypic aluminum silicon oxycarbide, (Al{sub 6-x}Si{sub x})(O{sub y}C{sub 5-y}) (x{approx}0.8 and y{approx}1.6)  

SciTech Connect

We have prepared a new layered oxycarbide, [Al{sub 5.25(5)}Si{sub 0.75(5)}][O{sub 1.60(7)}C{sub 3.40(7)}], by isothermal heating of (Al{sub 4.4}Si{sub 0.6})(O{sub 1.0}C{sub 3.0}) at 2273 K near the carbon-carbon monoxide buffer. The crystal structure was characterized using X-ray powder diffraction, transmission electron microscopy and energy dispersive X-ray spectroscopy (EDX). The title compound is trigonal with space group R3m (centrosymmetric), Z=3, and hexagonal cell dimensions a=0.32464(2) nm, c=4.00527(14) nm and V=0.36556(3) nm{sup 3}. The atom ratios Al:Si were determined by EDX, and the initial structural model was derived by the direct methods. The final structural model showed the positional disordering of one of the three types of Al/Si sites. The reliability indices were R{sub wp}=4.45% (S=1.30), R{sub p}=3.48%, R{sub B}=2.27% and R{sub F}=1.25%. The crystal is composed of three types of domains with nearly the same fraction, one of which has the crystal structure of space group R3-bar m. The crystal structure of the remaining two domains, which are related by pseudo-symmetry inversion, is noncentrosymmetric with space group R3m. - Graphical Abstract: A new aluminum silicon oxycarbide, (Al{sub 6-x}Si{sub x})(O{sub y}C{sub 5-y}) (x{approx}0.8 and y{approx}1.6). The crystal is composed of three types of domains (I, II and III), and hence the structure is represented by a split-atom model. Individual crystal structures can be regarded as layered structures, which consist of A-type [(Al,Si){sub 4}(O,C){sub 4}] unit layers and B-type [(Al,Si)(O,C){sub 2}] single layers.

Kaga, Motoaki; Urushihara, Daisuke; Iwata, Tomoyuki; Sugiura, Keita [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan); Nakano, Hiromi [Cooperative Research Facility Center, Toyohashi University of Technology, Toyohashi 441-8580 (Japan); Fukuda, Koichiro, E-mail: fukuda.koichiro@nitech.ac.j [Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)

2010-09-15T23:59:59.000Z

128

Education: Digital Resource Center - WEB: What is Metals Recycling?  

Science Conference Proceedings (OSTI)

Oct 22, 2007 ... This British Metals Recycling Association (BMRA) website provides details concerning steel, aluminum, and copper recycling including ...

129

Decontamination and reuse of ORGDP aluminum scrap  

Science Conference Proceedings (OSTI)

The Gaseous Diffusion Plants, or GDPs, have significant amounts of a number of metals, including nickel, aluminum, copper, and steel. Aluminum was used extensively throughout the GDPs because of its excellent strength to weight ratios and good resistance to corrosion by UF{sub 6}. This report is concerned with the recycle of aluminum stator and rotor blades from axial compressors. Most of the stator and rotor blades were made from 214-X aluminum casting alloy. Used compressor blades were contaminated with uranium both as a result of surface contamination and as an accumulation held in surface-connected voids inside of the blades. A variety of GDP studies were performed to evaluate the amounts of uranium retained in the blades; the volume, area, and location of voids in the blades; and connections between surface defects and voids. Based on experimental data on deposition, uranium content of the blades is 0.3%, or roughly 200 times the value expected from blade surface area. However, this value does correlate with estimated internal surface area and with lengthy deposition times. Based on a literature search, it appears that gaseous decontamination or melt refining using fluxes specific for uranium removal have the potential for removing internal contamination from aluminum blades. A melt refining process was used to recycle blades during the 1950s and 1960s. The process removed roughly one-third of the uranium from the blades. Blade cast from recycled aluminum appeared to perform as well as blades from virgin material. New melt refining and gaseous decontamination processes have been shown to provide substantially better decontamination of pure aluminum. If these techniques can be successfully adapted to treat aluminum 214-X alloy, internal and, possibly, external reuse of aluminum alloys may be possible.

Compere, A.L.; Griffith, W.L.; Hayden, H.W.; Wilson, D.F.

1996-12-01T23:59:59.000Z

130

Non-consumable anode and lining for aluminum electrolytic reduction cell  

DOE Patents (OSTI)

An oxidation resistant, non-consumable anode, for use in the electrolytic reduction of alumina to aluminum, has a composition comprising copper, nickel and iron. The anode is part of an electrolytic reduction cell comprising a vessel having an interior lined with metal which has the same composition as the anode. The electrolyte is preferably composed of a eutectic of AlF.sub.3 and either (a) NaF or (b) primarily NaF with some of the NaF replaced by an equivalent molar amount of KF or KF and LiF.

Beck, Theodore R. (Seattle, WA); Brooks, Richard J. (Seattle, WA)

1994-01-01T23:59:59.000Z

131

Climate VISION: Private Sector Initiatives: Aluminum: Resources...  

Office of Scientific and Technical Information (OSTI)

Industry Associations Aluminum Association The Aluminum Association, Inc. is the trade association for producers of primary aluminum, recyclers and semi-fabricated aluminum...

132

Five Ways Aluminum Foil Is Advancing Science | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Five Ways Aluminum Foil Is Advancing Science Five Ways Aluminum Foil Is Advancing Science Five Ways Aluminum Foil Is Advancing Science September 7, 2012 - 5:33pm Addthis SLAC National Accelerator Laboratory uses massive quantities of aluminum foil to perform "bake out" of their equipment. In a typical bake out, the equipment is blanketed in foil, wrapped with electrical heat tape, and then covered in foil again. Heat tape is used to heat the metal chamber just enough to loosen any residues that could cause trouble. The aluminum foil helps spread the heat evenly. | Photo of SLAC SLAC National Accelerator Laboratory uses massive quantities of aluminum foil to perform "bake out" of their equipment. In a typical bake out, the equipment is blanketed in foil, wrapped with electrical heat tape, and then

133

Five Ways Aluminum Foil Is Advancing Science | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Five Ways Aluminum Foil Is Advancing Science Five Ways Aluminum Foil Is Advancing Science Five Ways Aluminum Foil Is Advancing Science September 7, 2012 - 5:33pm Addthis SLAC National Accelerator Laboratory uses massive quantities of aluminum foil to perform "bake out" of their equipment. In a typical bake out, the equipment is blanketed in foil, wrapped with electrical heat tape, and then covered in foil again. Heat tape is used to heat the metal chamber just enough to loosen any residues that could cause trouble. The aluminum foil helps spread the heat evenly. | Photo of SLAC SLAC National Accelerator Laboratory uses massive quantities of aluminum foil to perform "bake out" of their equipment. In a typical bake out, the equipment is blanketed in foil, wrapped with electrical heat tape, and then

134

Development of Al-Si Alloy by Optimizing Modifiers and Grain Refiners  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

135

Accelerated Publication: Ge metal-oxide-semiconductor devices with Al2O3/Ga2O3(Gd2O3) as gate dielectric  

Science Conference Proceedings (OSTI)

Ga"2O"3(Gd"2O"3) [GGO] 3.5nm-thick, with an in situ Al"2O"3 cap 1.5nm thick, has been directly deposited on Ge substrate without employing interfacial passivation layers. The equivalent oxide thickness (EOT) of the gate stack is 1.38-nm. The metal-oxide-semiconductor ... Keywords: EOT, Germanium, High-? dielectric, MOS

L. K. Chu; T. H. Chiang; T. D. Lin; Y. J. Lee; R. L. Chu; J. Kwo; M. Hong

2012-03-01T23:59:59.000Z

136

Aluminum Plenary Session flier  

Science Conference Proceedings (OSTI)

The Strategic Impact of Changing Energy Markets on the Aluminum Industry ... For complete technical program information, and registration/housing details.

137

Aluminum Extrusion Alloys  

Science Conference Proceedings (OSTI)

Table 1   Aluminum extrusion alloys by series...6063 (1944), 6066, 6070, 6082 (1972), 6101 (1954), 6105 (1965),

138

INNOVATIONS IN ALUMINUM: II  

Science Conference Proceedings (OSTI)

Likewise, to produce aluminum sheet and some other products, dissolved sodium and calcium must be fluxed by reaction with chlorine. Today, the combined ...

139

Aluminum Association: Recycling  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... This webpage provides some historical information on aluminum recycling and describes the processes done by various recyclers: used ...

140

Aluminum Recycling, 2006  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... The book details the collecting, sorting, and separating of scrap aluminum as well as the processing and upgrading equipment used.

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Aluminum Reduction Technology  

Science Conference Proceedings (OSTI)

Increased Energy Efficiency and Reduced HF Emissions with New Heat Exchanger · Industrial Test of Low-voltage Energy-saving Aluminum Reduction ...

142

Improved Off-State Stress Critical Voltage on AlGaN/GaN High Electron Mobility Transistors Utilizing Pt/Ti/Au Based Gate Metallization  

Science Conference Proceedings (OSTI)

The critical voltage for degradation of AlGaN/GaN high electron mobility transistors (HEMTs) employed with the Pt/Ti/Au gate metallization instead of the commonly used Ni/Au was significantly increased during the off-state stress. The typical critical voltage for HEMTs with Ni/Au gate metallization was around -60V. By sharp contrast, no critical voltage was observed for the HEMTs with Pt/Ti/Au gate metallization, even up to -100V, which was the instrumental limitation in this experiment. Both Schottky forward and reverse gate characteristics of the Ni/Au degraded once the gate voltage passed the critical voltage of around -60V. There was no degradation exhibited for the HEMTs with Pt-gated HEMTs.

Lo, C. F. [University of Florida; Liu, L. [University of Florida, Gainesville; Kang, Tsung Sheng [University of Florida, Gainesville; Davies, Ryan [University of Florida; Gila, Brent P. [University of Florida, Gainesville; Pearton, S. J. [University of Florida; Kravchenko, Ivan I [ORNL; Laboutin, O. [Kopin Corporation, Taunton, MA; Cao, Yu [Kopin Corporation, Taunton, MA; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Ren, F. [University of Florida

2011-01-01T23:59:59.000Z

143

Versatile and Rapid Plasma Heating Device for Steel and Aluminum  

DOE Green Energy (OSTI)

The main objective of the research was to enhance steel and aluminum manufacturing with the development of a new plasma RPD device. During the project (1) plasma devices were manufactured (2) testing for the two metals were carried out and (3) market development strategies were explored. Bayzi Corporation has invented a Rapid Plasma Device (RPD) which produces plasma, comprising of a mixture of ionized gas and free electrons. The ions, when they hit a conducting surface, deposit heat in addition to the convective heat. Two generic models called the RPD-Al and RPD-S have been developed for the aluminum market and the steel market. Aluminum melting rates increased to as high as 12.7 g/s compared to 3 g/s of the current industrial practice. The RPD melting furnace operated at higher energy efficiency of 65% unlike most industrial processes operating in the range of 13 to 50%. The RPD aluminum melting furnace produced environment friendly cleaner melts with less than 1% dross. Dross is the residue in the furnace after the melt is poured out. Cast ingots were extremely clean and shining. Current practices produce dross in the range of 3 to 12%. The RPD furnace uses very low power ~0.2 kWh/Lb to melt aluminum. RPDs operate in one atmosphere using ambient air to produce plasma while the conventional systems use expensive gases like argon, or helium in air-tight chambers. RPDs are easy to operate and do not need intensive capital investment. Narrow beam, as well as wide area plasma have been developed for different applications. An RPD was developed for thermal treatments of steels. Two different applications have been pursued. Industrial air hardening steel knife edges were subjected to plasma beam hardening. Hardness, as measured, indicated uniform distribution without any distortion. The biggest advantage with this method is that the whole part need not be heated in a furnace which will lead to oxidation and distortion. No conventional process will offer localized hardening. The RPD has a great potential for heat treating surgical knives and tools. Unavailability of the full amount of the DOE award prevented further development of this exciting technology. Significant progress was made during the 5th quarter, specially the invention of the wider-area plasma and the resultant benefits in terms of rapid melting of aluminum and thermal treatments of larger size steel parts. Coating of nickel base superalloys was demonstrated (an additional task over that proposed). Directed low cost surface enhancement of steel and the directed clean low dross energy efficient melting of aluminum are industrial needs that require new technologies. These are large volume markets which can benefit from energy savings. Estimated energy savings are very large, in the order of 1015 J/year when the equipment is universally used. Compact and directed heating technology/product market in these two sectors could potentially reach over $1B in sales. The results of the research, presented at the DOE annual Review meeting on Aluminum held at the Oak Ridge National Laboratory during the 4-5 October 2005, were very well received by the delegates and panel reviewers. Insufficient DOE funds to fully fund the project at the end of the 5th quarter necessitated some key tasks being only partially completed.

Reddy, G.S.

2006-03-14T23:59:59.000Z

144

Technology Innovation in Aluminum Products  

Science Conference Proceedings (OSTI)

Today's U.S. aluminum production includes roughly 5.6 million tonnes of .... to help make the cost of aluminum competitive with steel.12 Aluminum pull tabs were ...

145

27Al and 1H Solid State NMR Studies Show Evidence of TiAl3 and TiH2 in Ti-doped NaAlH4  

DOE Green Energy (OSTI)

Previous X-ray Diffraction (XRD) and Nuclear Magnetic Resonance (NMR) studies on Ti-doped NaAlH{sub 4} revealed the reaction products of two heavily doped (33.3 at.%) samples that were solvent-mixed and mechanically-milled. This investigation revealed that nano-crystalline or amorphous Al{sub 2}O{sub 3} forms from the possible coordination of aluminum with oxygen atom of the furan ring system from added tetrahydrofuran (THF) in the solvent-mixed sample, and that TiAl{sub 3} forms in mechanically-milled samples. The present paper provides a more sophisticated NMR investigation of the these materials. On heavily doped (33.3 at.%) solvent-mixed samples, {sup 27}Al Magic Angle Spinning (MAS) NMR {sup 27}Al multiple quantum MAS (MQMAS) indicates the presence of an oxide layer of Al{sub 2}O{sub 3} on the surfaces of potentially bulk nanocrystalline Ti, nanocrystalline TiAl{sub 3}, and/or metallic aluminum. The {sup 1}H MAS NMR data also indicate the possible coordination of aluminum with the oxygen atom in the THF. On heavily doped samples that were mechanically milled, {sup 27}Al MAS NMR and static NMR confirms the presence of TiAl{sub 3}. In addition, the {sup 1}H MAS NMR and {sup 1}H spin-lattice relaxation (T{sub 1}) measurements are consistent with the presence of TiH{sub 2}. These results are in agreement with recent XAFS measurements indicating both Al and H within the first few coordination shells of Ti in the doped alanate.

Herberg, J; Maxwell, R; Majzoub, E

2005-05-26T23:59:59.000Z

146

Aluminum 2003 TABLE OF CONTENTS  

Science Conference Proceedings (OSTI)

DOE/OIT PHAST Program Application in the Aluminum Industry [pp. 239-242] F.L. Beichner. Retrofitting Regenerative Burners on Aluminum Melting Furnaces ...

147

Recyclability of Aluminum  

Science Conference Proceedings (OSTI)

...It is resistant to corrosion, and a low ratio of energy is required to remelt aluminum compared with that required for its primary production. Also, the alloy versatility of aluminum has resulted in a large number of commercial compositions, many of which were designed to accommodate impurity...

148

Relaxation and critical strain for maximum In incorporation in AlInGaN on GaN grown by metal organic vapour phase epitaxy  

Science Conference Proceedings (OSTI)

Quaternary AlInGaN layers were grown on conventional GaN buffer layers on sapphire by metal organic vapour phase epitaxy at different surface temperatures and different reactor pressures with constant precursor flow conditions. A wide range in compositions within 30-62% Al, 5-29% In, and 23-53% Ga was covered, which leads to different strain states from high tensile to high compressive. From high-resolution x-ray diffraction and Rutherford backscattering spectrometry, we determined the compositions, strain states, and crystal quality of the AlInGaN layers. Atomic force microscopy measurements were performed to characterize the surface morphology. A critical strain value for maximum In incorporation near the AlInGaN/GaN interface is presented. For compressively strained layers, In incorporation is limited at the interface as residual strain cannot exceed an empirical critical value of about 1.1%. Relaxation occurs at about 15 nm thickness accompanied by strong In pulling. Tensile strained layers can be grown pseudomorphically up to 70 nm at a strain state of 0.96%. A model for relaxation in compressively strained AlInGaN with virtual discrete sub-layers, which illustrates the gradually changing lattice constant during stress reduction is presented.

Reuters, Benjamin; Finken, M.; Wille, A.; Kalisch, H.; Vescan, A. [RWTH Aachen University, GaN Device Technology, Sommerfeldstrasse 24, 52074 Aachen (Germany); Juelich Aachen Research Alliance, JARA-FIT, Wilhelm-Johnen-Strasse, 52428 Juelich (Germany); Hollaender, B. [Juelich Aachen Research Alliance, JARA-FIT, Wilhelm-Johnen-Strasse, 52428 Juelich (Germany); Forschungszentrum Juelich GmbH, PGI9-IT, 52425 Juelich (Germany); Heuken, M. [RWTH Aachen University, GaN Device Technology, Sommerfeldstrasse 24, 52074 Aachen (Germany); AIXTRON SE, Kaiserstr. 98, 52134 Herzogenrath (Germany)

2012-11-01T23:59:59.000Z

149

Dissolving uranium oxide--aluminum fuel  

SciTech Connect

The dissolution of aluminum-clad uranium oxide-aluminum fuel was studied to provide basic data for dissolving this type of enriched uranium fuel at the Savannah River Plant. The studies also included the dissolution of a similar material prepared from scrap uranium oxides that were to be recycled through the solvent extraction process. The dissolving behavior of uranium oxide-aluminum core material is similar to that of U-Al alloy. Dissolving rates are rapid in HNO/sub 3/-Hg(NO/sub 3/)/sub 2/ solutions. Irradiation reduce s the dissolving rate and increases mechanical strength. A dissolution model for use in nuclear safety analyses is developed, . based on the observed dissolving characteristics. (auth)

Perkins, W.C.

1973-11-01T23:59:59.000Z

150

CHARACTERIZATION AND ALUMINUM DISSOLUTION DEMONSTRATION WITH A 3 LITER TANK 51H SAMPLE  

Science Conference Proceedings (OSTI)

A 3-liter sludge slurry sample was sent to SRNL for demonstration of a low temperature aluminum dissolution process. The sludge was characterized before and after the aluminum dissolution. Post aluminum dissolution sludge settling and the stability of the decanted supernate were also observed. The characterization of the as-received 3-liter sample of Tank 51H sludge slurry shows a typical high aluminum HM sludge. The XRD analysis of the dried solids indicates Boehmite is the predominant crystalline form of aluminum in the sludge solids. However, amorphous phases of aluminum present in the sludge would not be identified using this analytical technique. The low temperature (55 C) aluminum dissolution process was effective at dissolving aluminum from the sludge. Over the three week test, {approx}42% of the aluminum was dissolved out of the sludge solids. The process appears to be selective for aluminum with no other metals dissolving to any appreciable extent. At the termination of the three week test, the aluminum concentration in the supernate had not leveled off indicating more aluminum could be dissolved from the sludge with longer contact times or higher temperatures. The slow aluminum dissolution rate in the test may indicate the dissolution of the Boehmite form of aluminum however; insufficient kinetic data exists to confirm this hypothesis. The aluminum dissolution process appears to have minimal impact on the settling rate of the post aluminum dissolution sludge. However, limited settling data were generated during the test to quantify the effects. The sludge settling was complete after approximately twelve days. The supernate decanted from the settled sludge after aluminum dissolution appears stable and did not precipitate aluminum over the course of several months. A mixture of the decanted supernate with Tank 11 simulated supernate was also stable with respect to precipitation.

Hay, M; John Pareizs, J; Cj Bannochie, C; Michael Stone, M; Damon Click, D; Daniel McCabe, D

2008-02-29T23:59:59.000Z

151

Hutchison Effect Metal Samples: Description and Analysis  

Science Conference Proceedings (OSTI)

... and other equipment which caused severe plastic deformation, delamination, de-alloying and unusual magnetic properties in metal (aluminum, copper, brass,

152

Light Metals  

Science Conference Proceedings (OSTI)

... Aluminum Reduction Technology, and Electrode Technology for Aluminum ... Materials for Energy and Sustainability, Nanomaterials, Nuclear Materials ...

153

PROCESSING OF URANIUM-METAL-CONTAINING FUEL ELEMENTS  

DOE Patents (OSTI)

A process is given for recovering uranium from neutronbombarded uranium- aluminum alloys. The alloy is dissolved in an aluminum halide--alkali metal halide mixture in which the halide is a mixture of chloride and bromide, the aluminum halide is present in about stoichiometric quantity as to uranium and fission products and the alkali metal halide in a predominant quantity; the uranium- and electropositive fission-products-containing salt phase is separated from the electronegative-containing metal phase; more aluminum halide is added to the salt phase to obtain equimolarity as to the alkali metal halide; adding an excess of aluminum metal whereby uranium metal is formed and alloyed with the excess aluminum; and separating the uranium-aluminum alloy from the fission- productscontaining salt phase. (AEC)

Moore, R.H.

1962-10-01T23:59:59.000Z

154

ALUMINUM CLADDING DISSOLUTION  

DOE Patents (OSTI)

This patent shows a method of moderating the chemical reaction when aluminum is dissolved in 2 to 7 molar nitric acid with a mercury catalyst. Nickelous nitrate is added as a negative promoter. (AEC)

Schulz, W.W.

1964-01-28T23:59:59.000Z

155

ADVANCED CERAMIC COMPOSITES FOR MOLTEN ALUMINUM CONTACT APPLICATIONS  

Science Conference Proceedings (OSTI)

A new refractory material which was developed for use in molten aluminum contact applications was shown to exhibit improved corrosion and wear resistance leading to improved thermal management through reduced heat losses caused by refractory thinning and wastage. This material was developed based on an understanding of the corrosion and wear mechanisms associated with currently used aluminum contact refractories under a U.S. Department of Energy funded project to investigate multifunctional refractory materials for energy efficient handling of molten metals. This new material has been validated through an industrial trial at a commercial aluminum rod and cable mill. Material development and results of this industrial validation trial are discussed.

Hemrick, James Gordon [ORNL; Peters, Klaus-Markus [ORNL

2009-01-01T23:59:59.000Z

156

Alumina reduction by laser sustained plasma for aluminum-based renewable energy cycling  

Science Conference Proceedings (OSTI)

A novel alumina (Al 2O3) reduction technique for a renewable energy cycling system based on aluminum is proposed. Al 2O3 powder was fed into laser-sustained plasma and thermally dissociated. The produced Al was expanded to supersonic speeds through a nozzle. From the Al and argon line distributions in the flow direction

2013-01-01T23:59:59.000Z

157

DISPERSIONS OF URANIUM CARBIDES IN ALUMINUM PLATE-TYPE RESEARCH REACTOR FUEL ELEMENTS  

DOE Green Energy (OSTI)

The technical feasibility of employing uranium carbide aluminun dispersions in aluminum-base research reactor fuel elements was investigated This study was motivated by the need to obtain higher uranium loadings in these fuel elements. Although toe MTR-type unit, containing a 13 18 wt% U-Al alloy is a proven reactor component, fabrication problems of considerable magnitude arise when attempts are made to increase the uranium investment in the alloy to more than 25 wt.%. Au approach to these fabrication difficulties is to select a compound with significantly higher density tban UAl/sub 4/ or UAl/sub 3/ compounds of the alloy system which when dispersed in aluminum powder, will reduce the volume occupied by the brittle, fissile phase. The uranium carbides, with densities ranging from 11.68 to 13.63 g/cm/sup 3/), appear to be suited for this application and were selected for development as a fuel material for aluminum-base dispersions. Studies were conducted at 580 to 620 deg C to determine the chemical compatibility of carbides with aluminum in sub-size cold- pressed comparts as well as in full-size fabricated fuel plates. Procedures were also developed to prepare uranium carbides, homogernously disperse the compounds in aluminum, roll clad the dispersions to form composite plates, and braze the plates into fuel assemblies. Corrosion tests of the fuel material were conducted in 20 and 60 deg C water to determine the integrity of the fuel material in the event of sin inadventent cladding failure. In addition, specimens were prepared to evaluate penformance under extensive irradiation Prior to studying the uranium carbide-aluminum system, methods for preparing the carbides were investigated. Are melting uranium and carnon was satisfactory for obtaining small quantities of various carbides. Later, reaction of graphite with UO/sub 2/ was successfully employed in the preparation of large quantities of UC/sub 2/, Studies of the chemical compatibility of cold-pressed compacts containing 50 wt% uranium carbide dispersed in aluminum revealed a marked trend toward stebifity as the carbon content of the uranium carbide increased from 446 to 9.20% C. Severe volume increases occurred in monocarbide dispersions with attendant formation of large quantities of the uranium-allumnim inter-metallic compounds. Dicarbide dispersions, on the other band, exhibited negligible reaction with aluminum after extended periods at 580 and 620 deg C. However, it was demonstrated that hydrogen can promote a reaction in UC/sub 2/-Al compacts. The hydrogen appears to reduce the UC/sub 2/ to UC which can subsequently react with aluminum producing the previously noted deleterious effects. A growth study at 605 deg C of composite fuel plates containing 59 wt.% UC/sub 2/ revealed insignificant changes within processing periods envisioned for fuel element processing. However, plate elongations as high as 2.5% were observed after 100 hr at this temperature. Severe blistering which occurred on fuel plates fabricated in the initial stages of the investigation was attributed to gaseous hydrocarbons, and the condition was ellminated by vacuum degasification of cold-pressed compacts. With the exception of the degasification requirement, procedures for manufacturing UC- bearing fuel elements were identical to those specified for the Geneva Conference Reactor fuel elements. Dispersions of uranium dicarbide corroded catastrophically in 20 and 60 deg C water, thus limiting the application of this material However, spocimens were prepared and insented in the MTR to evaluate the irradiation behavior of this fuel because of its potential application in onganic- cooled reactors. (auth)

Thurber, W.C.; Beaver, R.J.

1959-11-19T23:59:59.000Z

158

Behavior of surface layers during the reciprocating wear of SiC-Al/Si metal matrix composites  

SciTech Connect

SiC particulate reinforced Al-Si matrix composite has been studied to determine the microscopic characteristics of surface layers including re-distribution of SiC particles during unlubricated reciprocal sliding wear at ambient temperature. Using a ball-on-block reciprocal test jig resulted in a surface mixed layer (SML) with fragmented SiC particles. The occurrence of the SML depends upon the number of sliding cycles and contact stress. The depth of the SML is also affected by the applied load and number of wear cycles.

Feng, Z.C.; Tandon, K.N. (Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Mechanical and Industrial Engineering)

1995-02-15T23:59:59.000Z

159

Welding of Al- and Mg-alloys  

Science Conference Proceedings (OSTI)

Oct 9, 2012 ... Joining of Advanced and Specialty Materials (JASM XIV): Welding of Al- and ... Do and Don't for Arc Welding of Aluminum: Israel Stol1; 1Alcoa

160

Bevill and the Aluminum Industry  

Science Conference Proceedings (OSTI)

... particularly the import, mining, refining and primary production of aluminum. ... Experience with Commissioning New Generation Gas Suspension Calciner.

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Recycling of Aluminum & Other Light Metals  

Science Conference Proceedings (OSTI)

TMS Logo. About the 1997 TMS Annual Meeting: Short Course Description. February 9-13 · 1997 TMS ANNUAL MEETING · Orlando, Florida. Orlando '97 ...

162

Advances in Metal Casting Technologies: Aluminum  

Science Conference Proceedings (OSTI)

... Deposition of Thin Films via Sputtering: Ulises Barajas1; Sugeily Flores- Bonano,1; Verónica Santiago-Torres1; O. Marcelo Suárez1; 1University of Puerto Rico

163

Aluminum stimulates uptake of non-transferrin bound iron and transferrin bound iron in human glial cells  

SciTech Connect

Aluminum and other trivalent metals were shown to stimulate uptake of transferrin bound iron and nontransferrin bound iron in erytholeukemia and hepatoma cells. Because of the association between aluminum and Alzheimer's Disease, and findings of higher levels of iron in Alzheimer's disease brains, the effects of aluminum on iron homeostasis were examined in a human glial cell line. Aluminum stimulated dose- and time-dependent uptake of nontransferrin bound iron and iron bound to transferrin. A transporter was likely involved in the uptake of nontransferrin iron because uptake reached saturation, was temperature-dependent, and attenuated by inhibitors of protein synthesis. Interestingly, the effects of aluminum were not blocked by inhibitors of RNA synthesis. Aluminum also decreased the amount of iron bound to ferritin though it did not affect levels of divalent metal transporter 1. These results suggest that aluminum disrupts iron homeostasis in Brain by several mechanisms including the transferrin receptor, a nontransferrin iron transporter, and ferritin.

Kim, Yongbae [Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University (United States); Department of Preventive Medicine, Soonchunhyan University, Chunan City (Korea, Republic of) ; Olivi, Luisa [School of Pharmacy, Sahmyook University, Seoul (Korea, Republic of) ; Cheong, Jae Hoon [School of Pharmacy, Sahmyook University, Seoul (Korea, Republic of) ; Maertens, Alex [Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University (United States); Bressler, Joseph P. [Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University (United States) and Kennedy-Krieger Institute, Baltimore, MD 21205 (United States)]. E-mail: Bressler@kennedykrieger.org

2007-05-01T23:59:59.000Z

164

Gas-tungsten arc welding of aluminum alloys  

SciTech Connect

A gas-tungsten arc welding method for joining together structures formed of aluminum alloy with these structures disposed contiguously to a heat-damagable substrate of a metal dissimilar to the aluminum alloy. The method of the present invention is practiced by diamond machining the fay surfaces of the aluminum alloy structures to provide a mirror finish thereon having a surface roughness in the order of about one microinch. The fay surfaces are aligned and heated sufficiently by the tungsten electrode to fuse the aluminum alloy contiguous to the fay surfaces to effect the weld joint. The heat input used to provide an oxide-free weld is significantly less than that required if the fay surfaces were prepared by using conventional chemical and mechanical practices.

Frye, Lowell D. (Kingston, TN)

1984-01-01T23:59:59.000Z

165

Gas-tungsten arc welding of aluminum alloys  

DOE Patents (OSTI)

The present invention is directed to a gas-tungsten arc welding method for joining together structures formed of aluminum alloy with these structures disposed contiguously to a heat-damagable substrate of a metal dissimilar to the aluminum alloy. The method of the present invention is practiced by diamond machining the fay surfaces of the aluminum alloy structures to profice a mirror finish thereon having a surface roughness in the order of about one microinch. The fay surface are aligned and heated sufficiently by the tungsten electrode to fuse the aluminum alloy continguous to the fay surfaces to effect the weld joint. The heat input used to provide an oxide-free weld is significantly less than that required if the fay surfaces were prepared by using conventional chemical and mechanical practices.

Frye, L.D.

1982-03-25T23:59:59.000Z

166

Lightweight Aluminum/Nano composites for Automotive Drive Train Applications  

SciTech Connect

During Phase I, we successfully processed air atomized aluminum powders via Dynamic Magnetic Compaction (DMC) pressing and subsequent sintering to produce parts with properties similar to wrought aluminum. We have also showed for the first time that aluminum powders can be processed without lubes via press and sintering to 100 % density. This will preclude a delube cycle in sintering and promote environmentally friendly P/M processing. Processing aluminum powders via press and sintering with minimum shrinkage will enable net shape fabrication. Aluminum powders processed via a conventional powder metallurgy process produce too large a shrinkage. Because of this, sinter parts have to be machined into specific net shape. This results in increased scrap and cost. Fully sintered aluminum alloy under this Phase I project has shown good particle-to-particle bonding and mechanical properties. We have also shown the feasibility of preparing nano composite powders and processing via pressing and sintering. This was accomplished by dispersing nano silicon carbide (SiC) powders into aluminum matrix comprising micron-sized powders (<100 microns) using a proprietary process. These composite powders of Al with nano SiC were processed using DMC press and sinter process to sinter density of 85-90%. The process optimization along with sintering needs to be carried out to produce full density composites.

Chelluri, Bhanumathi; Knoth, Edward A.; Schumaker, Edward J.

2012-12-14T23:59:59.000Z

167

Aluminum battery alloys  

DOE Patents (OSTI)

Aluminum alloys suitable for use as anode structures in electrochemical cells are disclosed. These alloys include iron levels higher than previously felt possible, due to the presence of controlled amounts of manganese, with possible additions of magnesium and controlled amounts of gallium.

Thompson, D.S.; Scott, D.H.

1984-09-28T23:59:59.000Z

168

Aluminum battery alloys  

SciTech Connect

Aluminum alloys suitable for use as anode structures in electrochemical cs are disclosed. These alloys include iron levels higher than previously felt possible, due to the presence of controlled amounts of manganese, with possible additions of magnesium and controlled amounts of gallium.

Thompson, David S. (Richmond, VA); Scott, Darwin H. (Mechanicsville, VA)

1985-01-01T23:59:59.000Z

169

Hydrogen storage in sodium aluminum hydride.  

DOE Green Energy (OSTI)

Sodium aluminum hydride, NaAlH{sub 4}, has been studied for use as a hydrogen storage material. The effect of Ti, as a few mol. % dopant in the system to increase kinetics of hydrogen sorption, is studied with respect to changes in lattice structure of the crystal. No Ti substitution is found in the crystal lattice. Electronic structure calculations indicate that the NaAlH{sub 4} and Na{sub 3}AlH{sub 6} structures are complex-ionic hydrides with Na{sup +} cations and AlH{sub 4}{sup -} and AlH{sub 6}{sup 3-} anions, respectively. Compound formation studies indicate the primary Ti-compound formed when doping the material at 33 at. % is TiAl{sub 3} , and likely Ti-Al compounds at lower doping rates. A general study of sorption kinetics of NaAlH{sub 4}, when doped with a variety of Ti-halide compounds, indicates a uniform response with the kinetics similar for all dopants. NMR multiple quantum studies of solution-doped samples indicate solvent interaction with the doped alanate. Raman spectroscopy was used to study the lattice dynamics of NaAlH{sub 4}, and illustrated the molecular ionic nature of the lattice as a separation of vibrational modes between the AlH{sub 4}{sup -} anion-modes and lattice-modes. In-situ Raman measurements indicate a stable AlH{sub 4}{sup -} anion that is stable at the melting temperature of NaAlH{sub 4}, indicating that Ti-dopants must affect the Al-H bond strength.

Ozolins, Vidvuds; Herberg, J.L. (Lawrence Livermore National Laboratories, Livermore, CA); McCarty, Kevin F.; Maxwell, Robert S. (Lawrence Livermore National Laboratories, Livermore, CA); Stumpf, Roland Rudolph; Majzoub, Eric H.

2005-11-01T23:59:59.000Z

170

Microstructure control of Al-Cu films for improved electromigration resistance  

DOE Patents (OSTI)

A process for the forming of Al-Cu conductive thin films with reduced electromigration failures is useful, for example, in the metallization of integrated circuits. An improved formation process includes the heat treatment or annealing of the thin film conductor at a temperature within the range of from 200 C to 300 C for a time period between 10 minutes and 24 hours under a reducing atmosphere such as 15% H[sub 2] in N[sub 2] by volume. Al-Cu thin films annealed in the single phase region of a phase diagram, to temperatures between 200 C and 300 C have [theta]-phase Al[sub 2] Cu precipitates at the grain boundaries continuously become enriched in copper, due, it is theorized, to the formation of a thin coating of [theta]-phase precipitate at the grain boundary. Electromigration behavior of the aluminum is, thus, improved because the [theta]-phase precipitates with copper hinder aluminum diffusion along the grain boundaries. Electromigration, then, occurs mainly within the aluminum grains, a much slower process. 5 figures.

Frear, D.R.; Michael, J.R.; Romig, A.D. Jr.

1994-04-05T23:59:59.000Z

171

Microstructure control of Al-Cu films for improved electromigration resistance  

DOE Patents (OSTI)

A process for the forming of Al-Cu conductive thin films with reduced electromigration failures is useful, for example, in the metallization of integrated circuits. An improved formation process includes the heat treatment or annealing of the thin film conductor at a temperature within the range of from 200.degree. C. to 300.degree. C. for a time period between 10 minutes and 24 hours under a reducing atmosphere such as 15% H.sub.2 in N.sub.2 by volume. Al-Cu thin films annealed in the single phase region of a phase diagram, to temperatures between 200.degree. C. and 300.degree. C. have .theta.-phase Al.sub.2 Cu precipitates at the grain boundaries continuously become enriched in copper, due, it is theorized, to the formation of a thin coating of .theta.-phase precipitate at the grain boundary. Electromigration behavior of the aluminum is, thus, improved because the .theta.-phase precipitates with copper hinder aluminum diffusion along the grain boundaries. Electromigration, then, occurs mainly within the aluminum grains, a much slower process.

Frear, Darrel R. (Albuquerque, NM); Michael, Joseph R. (Albuquerque, NM); Romig, Jr., Alton D. (Albuquerque, NM)

1994-01-01T23:59:59.000Z

172

DETERMINATION OF IN-VITRO LUNG SOLUBILITY AND INTAKE-TO-DOSE CONVERSION FACTOR FOR TRITIATED LANTHANUM NICKEL ALUMINUM ALLOY  

SciTech Connect

A sample of tritiated lanthanum nickel aluminum alloy (LaNi4.25Al0.75 or LANA.75) similar to that used at the Savannah River Site Tritium Facilities was analyzed to estimate the particle size distribution of this metal tritide powder and the rate, at which this material dissolves in the human respiratory tract after it is inhaled. This information is used to calculate the committed effective dose received by a worker after inhaling the material. These doses, which were calculated using the same methodology given in the DOE Tritium Handbook, are presented as inhalation intake-to-dose conversion factors (DCF). The DCF for this metal tritide is less than the DCF for tritiated water and radiation worker bioassay programs designed for tritiated water are adequate to monitor for intakes of this material.

Farfan, E.; Labone, T.; Staack, G.; Cheng, Y.; Zhou, Y.; Varallo, T.

2011-11-11T23:59:59.000Z

173

Template synthesis and surface modification of metal oxides.  

E-Print Network (OSTI)

??Porous metal oxide monoliths, specifically silica, titania, zirconia and mixed oxides containing aluminum and yttrium, were prepared in a one-pot synthesis. Macroporosity was induced using… (more)

Drisko, Glenna Lynn

2010-01-01T23:59:59.000Z

174

TMS Professional Honors and Awards: Light Metals Award  

Science Conference Proceedings (OSTI)

Light Metals Recycling Technology Award. Jyoti Mukhopadhyay, Jawajtnrlal Nehru Aluminum R&D Centre Y.V. Ramana, Hidalco Industries Ltd Upendra Singh ...

175

Identifying Economic and Scrap Reuse Benefits of Light Metals ...  

Science Conference Proceedings (OSTI)

Feb 1, 2005 ... TMS: The Minerals, Metals and Materials Society Home ... The constantly changing and evolving patterns of aluminum scrap usage have ...

176

Deformation, Damage, and Fracture of Light Metals and Alloys  

Science Conference Proceedings (OSTI)

The three most highly used light metals and alloys are magnesium, aluminum, and titanium alloys. These alloys are widely utilized to manufacture structural ...

177

LIFE CYCLE INVENTORY ANALYSIS IN THE PRODUCTION OF METALS USED IN PHOTOVOLTAICS.  

Science Conference Proceedings (OSTI)

Material flows and emissions in all the stages of production of zinc, copper, aluminum, cadmium, indium, germanium, gallium, selenium, tellurium, and molybdenum were investigated. These metals are used selectively in the manufacture of solar cells, and emission and energy factors in their production are used in the Life Cycle Analysis (LCA) of photovoltaics. Significant changes have occurred in the production and associated emissions for these metals over the last 10 years, which are not described in the LCA databases. Furthermore, emission and energy factors for several of the by-products of the base metal production were lacking. This report aims in updating the life-cycle inventories associated with the production of the base metals (Zn, Cu, Al, Mo) and in defining the emission and energy allocations for the minor metals (Cd, In, Ge, Se, Te and Ga) used in photovoltaics.

FTHENAKIS,V.M.; KIM, H.C.; WANG, W.

2007-03-30T23:59:59.000Z

178

Method of coating metal surfaces to form protective metal coating thereon  

DOE Patents (OSTI)

A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixtures thereof. The flux, in particulate form, is mixed with particles of a metal coating material which may comprise aluminum, chromium, mixtures thereof, and alloys containing at least 50 wt. % aluminum and the particulate mixture is applied to the metal surface in a single step, followed by heating the coated metal surface to a temperature sufficient to cause the metal coating material to react with the metal surface to form a protective reaction product in the form of a metal coating bonded to the metal surface. The metal surface which reacts with the metal coating material to form the protective coating may comprise Fe, Co, Ni, Ti, V, Cr, Mn, Zr, Nb, Mo, Tc, Hf, Ta, W, Re and alloys thereof.

Krikorian, Oscar H. (Danville, CA); Curtis, Paul G. (Tracy, CA)

1992-01-01T23:59:59.000Z

179

Method of coating metal surfaces to form protective metal coating thereon  

DOE Patents (OSTI)

A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixtures thereof. The flux, in particulate form, is mixed with particles of a metal coating material which may comprise aluminum, chromium, mixtures thereof, and alloys containing at least 50 wt. % aluminum and the particulate mixture is applied to the metal surface in a single step, followed by heating the coated metal surface to a temperature sufficient to cause the metal coating material to react with the metal surface to form a protective reaction product in the form of a metal coating bonded to the metal surface. The metal surface which reacts with the metal coating material to form the protective coating may comprise Fe, Co, Ni, Ti, V, Cr, Mn, Zr, Nb, Mo, Tc, Hf, Ta, W, Re and alloys thereof. 1 figure.

Krikorian, O.H.; Curtis, P.G.

1992-03-31T23:59:59.000Z

180

Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys  

DOE Patents (OSTI)

Disclosed is a method for the carbothermic reduction of aluminum oxide to form an aluminum alloy including producing silicon carbide by heating a first mix of carbon and silicon oxide in a combustion reactor to an elevated temperature sufficient to produce silicon carbide at an accelerated rate, the heating being provided by an in situ combustion with oxygen gas, and then admixing the silicon carbide with carbon and aluminum oxide to form a second mix and heating the second mix in a second reactor to an elevated metal-forming temperature sufficient to produce aluminum-silicon alloy. The prereduction step includes holding aluminum oxide substantially absent from the combustion reactor. The metal-forming step includes feeding silicon oxide in a preferred ratio with silicon carbide. 1 fig.

Stevenson, D.T.; Troup, R.L.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys  

DOE Patents (OSTI)

Disclosed is a method for the carbothermic reduction of aluminum oxide to form an aluminum alloy including producing silicon carbide by heating a first mix of carbon and silicon oxide in a combustion reactor to an elevated temperature sufficient to produce silicon carbide at an accelerated rate, the heating being provided by an in situ combustion with oxygen gas, and then admixing the silicon carbide with carbon and aluminum oxide to form a second mix and heating the second mix in a second reactor to an elevated metal-forming temperature sufficient to produce aluminum-silicon alloy. The prereduction step includes holding aluminum oxide substantially absent from the combustion reactor. The metal-forming step includes feeding silicon oxide in a preferred ratio with silicon carbide.

Stevenson, David T. (Washington Township, Armstrong County, PA); Troup, Robert L. (Murrysville, PA)

1985-01-01T23:59:59.000Z

182

DOE - Office of Legacy Management -- Hunter Douglas Aluminum Plant Div of  

Office of Legacy Management (LM)

Hunter Douglas Aluminum Plant Div Hunter Douglas Aluminum Plant Div of Bridgeport Brass Co - CA 11 FUSRAP Considered Sites Site: HUNTER DOUGLAS ALUMINUM PLANT, DIV. OF BRIDGEPORT BRASS CO. (CA.11 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Hunter Douglas Aluminum Corporation CA.11-1 Location: 3016 Kansas Avenue , Riverside , California CA.11-1 Evaluation Year: 1995 CA.11-2 Site Operations: Fabricated uranium metal tubing during the late 1950s. CA.11-1 Site Disposition: Eliminated - No Authority - NRC licensed CA.11-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium Metal CA.11-1 Radiological Survey(s): No Site Status: Eliminated from consideration under FUSRAP Also see Documents Related to HUNTER DOUGLAS ALUMINUM PLANT, DIV. OF BRIDGEPORT

183

Fabrication of Aluminum Alloy-Based Diamond Grinding Wheel by ...  

Science Conference Proceedings (OSTI)

Moreover, ability of CFRP drilling of the aluminum alloy-based diamond grinding wheel ... Accelerated Post-Weld Natural Ageing in Ultrasonic Welding Aluminium ..... Powder Metallurgy of High Strength Al84Gd6Ni7Co3 Gas-atomized Powder.

184

Spray-formed tooling and aluminum strip  

SciTech Connect

Spray forming is an advanced materials processing technology that converts a bulk liquid metal to a near-net-shape solid by depositing atomized droplets onto a suitably shaped substrate. By combining rapid solidification processing with product shape control, spray forming can reduce manufacturing costs while improving product quality. De Laval nozzles offer an alternative method to the more conventional spray nozzle designs. Two applications are described: high-volume production of aluminum alloy strip, and the production of specialized tooling, such as injection molds and dies, for rapid prototyping.

McHugh, K.M.

1995-11-01T23:59:59.000Z

185

Production of aluminum-26  

DOE Patents (OSTI)

This invention is a method of producing Al-26 from potassium chloride by exposing it to a proton beam in order to break potassium and chlorine atoms into smaller pieces, which include Al-26. The Al-26 is isolated from the potassium chloride and substances produced by the beam by means of extraction and ion exchange.

Steinkruger, F.J.; Phillips, D.R.

1990-12-31T23:59:59.000Z

186

Production of aluminum-26  

DOE Patents (OSTI)

A method of producing Al-26 from potassium chloride by exposing it to a proton beam in order to break potassium and chlorine atoms into smaller pieces, which include Al-26. The Al-26 is isolated from the potassium chloride and other substances produced by the beam by means of extraction and ion exchange.

Steinkruger, Fred J. (Los Alamos, NM); Phillips, Dennis R. (Los Alamos, NM)

1991-01-01T23:59:59.000Z

187

Cast Shop for Aluminum Production  

Science Conference Proceedings (OSTI)

Organizer(s), Trond Furu, Hydro ... Review at Several US Aluminum Die Cast Manufacturers Using Unique, Non-Wetting, Micro-Porous Refractory Products.

188

Electrode Technology for Aluminum Production  

Science Conference Proceedings (OSTI)

Loss in Cathode Life Resulting from the Shutdown and Restart of Potlines at Aluminum Smelters · Lower Aluminium Production Cost through Refractory Material ...

189

Laser welding of aluminum alloys  

DOE Green Energy (OSTI)

Recent interest in reducing the weight of automobiles to increase fuel mileage has focused attention on the use of aluminum and associated joining technologies. Laser beam welding is one of the more promising methods for high speed welding of aluminum. Consequently, substantial effort has been expended in attempting to develop a robust laser beam welding process. Early results have not been very consistent in the process requirements but more definitive data has been produced recently. This paper reviews the process parameters needed to obtain consistent laser welds on 5,000 series aluminum alloys and discusses the research necessary to make laser processing of aluminum a reality for automotive applications.

Leong, K.H.; Sabo, K.R.; Sanders, P.G. [Argonne National Lab., IL (United States). Technology Development Div.; Spawr, W.J.

1997-03-01T23:59:59.000Z

190

Aluminum Alloys for Packaging II  

Science Conference Proceedings (OSTI)

Feb 1, 1996 ... An update is provided of all aspects of can stock materials and the fundamentals of can making, including: the physical metallurgy of aluminum ...

191

Aluminum: Technology, Applications, and Environment  

Science Conference Proceedings (OSTI)

Apr 1, 1998 ... Print Book: Aluminium - Rolling (Process, Principle & Applications). Print Book: Hall-Héroult Centennial: First Century of Aluminum Process ...

192

Aluminum 2002 TABLE OF CONTENTS  

Science Conference Proceedings (OSTI)

Development of Strain Induced Surface Topography of 6XXX Series Aluminum Sheet Under Balanced Biaxial Tension [pp. 83-90] S.W. Banovic and T. Foecke.

193

Aluminum Alloys for Packaging III  

Science Conference Proceedings (OSTI)

Feb 1, 1998... of aluminum can stock, lid stock, and tab stock alloys; coatings; and their related applications to can, lid, and tab making could be presented.

194

Molten Salts, Magnesium and Aluminum  

Science Conference Proceedings (OSTI)

Mar 1, 2011 ... Chloride 2011: Practice and Theory of Chloride-Based Metallurgy: Molten Salts, Magnesium and Aluminum Sponsored by: The Minerals, ...

195

Method for improving the oxidation-resistance of metal substrates coated with thermal barrier coatings  

DOE Patents (OSTI)

A method for providing a protective coating on a metal-based substrate is disclosed. The method involves the application of an aluminum-rich mixture to the substrate to form a discontinuous layer of aluminum-rich particles, followed by the application of a second coating over the discontinuous layer of aluminum-rich particles. Aluminum diffuses from the aluminum-rich layer into the substrate, and into any bond coat layer which is subsequently applied. Related articles are also described.

Thompson, Anthony Mark (Niskayuna, NY); Gray, Dennis Michael (Delanson, NY); Jackson, Melvin Robert (Niskayuna, NY)

2002-01-01T23:59:59.000Z

196

Aluminum Smelter Cell Dynamics  

Science Conference Proceedings (OSTI)

He has become an acclaimed world leader in cell diagnostics and operations as well as being a regular contributor to TMS Light Metals. He teaches in the TMS ...

197

(HSBC) of Aluminum Alloy  

Science Conference Proceedings (OSTI)

Effect of Fe Doping on the Mechanical Properties of TiNi Alloys · Electromagnetic Stirring of Plutonium Metal Part I: Theoretical Calculations and System Design ...

198

Aluminum complexation by catechol as determined by ultraviolet spectrophotometry  

Science Conference Proceedings (OSTI)

Methods of ultraviolet (UV) spectrophotometry were used to determine the stoichiometry and association constant for the Al-catechol complex from pH 3.8 to 4.6. Job's method of continuous variation indicated the Al-catechol complex had a 1:1 stoichiometry in the pH range studied. Aluminum titrations of catechol and pH titrations of catechol plus Al resulted in a shift in the UV spectra due to the formation of an Al-catechol complex absorbing UV radiation uniquely different than that of free catechol. General equations were developed for the determination of association constants assuming an organic and Al-organic complex absorb UV radiation. Aluminum titrations with constant catechol concentration yielded a log k/sub 0.1//sup c/ of 16.22 for a 1:1 Al-catechol complex. Calculated absorbance as a function of pH agree dwell with experimental pH titrations of solutions containing catechol plus Al. The fact that Al can be complexed by catechol at low pH indicates the o-hydroxy group provides a potential source for Al complexation in soil and surface waters.

Sikora, F.J.; McBride, M.B.

1989-03-01T23:59:59.000Z

199

Selective Adsorption of Sodium Aluminum Fluoride Salts from Molten Aluminum  

SciTech Connect

Aluminum is produced in electrolytic reduction cells where alumina feedstock is dissolved in molten cryolite (sodium aluminum fluoride) along with aluminum and calcium fluorides. The dissolved alumina is then reduced by electrolysis and the molten aluminum separates to the bottom of the cell. The reduction cell is periodically tapped to remove the molten aluminum. During the tapping process, some of the molten electrolyte (commonly referred as “bath” in the aluminum industry) is carried over with the molten aluminum and into the transfer crucible. The carryover of molten bath into the holding furnace can create significant operational problems in aluminum cast houses. Bath carryover can result in several problems. The most troublesome problem is sodium and calcium pickup in magnesium-bearing alloys. Magnesium alloying additions can result in Mg-Na and Mg-Ca exchange reactions with the molten bath, which results in the undesirable pickup of elemental sodium and calcium. This final report presents the findings of a project to evaluate removal of molten bath using a new and novel micro-porous filter media. The theory of selective adsorption or removal is based on interfacial surface energy differences of molten aluminum and bath on the micro-porous filter structure. This report describes the theory of the selective adsorption-filtration process, the development of suitable micro-porous filter media, and the operational results obtained with a micro-porous bed filtration system. The micro-porous filter media was found to very effectively remove molten sodium aluminum fluoride bath by the selective adsorption-filtration mechanism.

Leonard S. Aubrey; Christine A. Boyle; Eddie M. Williams; David H. DeYoung; Dawid D. Smith; Feng Chi

2007-08-16T23:59:59.000Z

200

Spray Forming Aluminum - Final Report (Phase II)  

SciTech Connect

The U.S. Department of Energy - Office of Industrial Technology (DOE) has an objective to increase energy efficient and enhance competitiveness of American metals industries. To support this objective, ALCOA Inc. entered into a cooperative program to develop spray forming technology for aluminum. This Phase II of the DOE Spray Forming Program would translate bench scale spray forming technology into a cost effective world class process for commercialization. Developments under DOE Cooperative Agreement No. DE-FC07-94ID13238 occurred during two time periods due to budgetary constraints; April 1994 through September 1996 and October 1997 and December 1998. During these periods, ALCOA Inc developed a linear spray forming nozzle and specific support processes capable of scale-up for commercial production of aluminum sheet alloy products. Emphasis was given to alloys 3003 and 6111, both being commercially significant alloys used in the automotive industry. The report reviews research performed in the following areas: Nozzel Development, Fabrication, Deposition, Metal Characterization, Computer Simulation and Economics. With the formation of a Holding Company, all intellectual property developed in Phases I and II of the Project have been documented under separate cover for licensing to domestic producers.

D. D. Leon

1999-07-08T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Activated aluminum hydride hydrogen storage compositions and ...  

In one aspect, the invention relates to activated aluminum hydride hydrogen storage compositions containing aluminum hydride in the presence of, or absence of ...

202

Chemical Hydrogen Storage Using Polyhedral Borane Anions and Aluminum-Ammonia-Borane Complexes  

DOE Green Energy (OSTI)

Phase 1. Hydrolysis of borohydride compounds offer the potential for significant hydrogen storage capacity, but most work to date has focused on one particular anion, BH4-, which requires high pH for stability. Other borohydride compounds, in particular polyhedral borane anions offer comparable hydrogen storage capacity without requiring high pH media and their long term thermal and hydrolytic stability coupled with non-toxic nature make them a very attractive alternative to NaBH4. The University of Missouri project provided the overall program focal point for the investigation of catalytic hydrolysis of polyhedral borane anions for hydrogen release. Due to their inherent stability, a transition metal catalyst was necessary for the hydrolysis of polyhedral borane anions. Transition metal ions such as cobalt, nickel, palladium and rhodium were investigated for their catalytic activity in the hydrolysis of nido-KB11H14, closo-K2B10H10, and closo-K2B12H12. The rate of hydrolysis follows first-order kinetics with respect to the concentration of the polyhedral borane anion and surface area of the rhodium catalyst. The rate of hydrolysis depends upon a) choice of polyhedral borane anion, c) concentration of polyhedral borane anion, d) surface area of the rhodium catalyst and e) temperature of the reaction. In all cases the yield of hydrogen was 100% which corresponds to ~7 wt% of hydrogen (based on material wt%). Phase 2. The phase 2 of program at the University of Missouri was focused upon developing aluminum ammonia-boranes (Al-AB) as chemical hydrogen storage materials, specifically their synthesis and studies of their dehydrogenation. The ammonia borane molecule (AB) is a demonstrated source of chemically stored hydrogen (19.6 wt%) which meets DOE performance parameters except for its regeneration from spent AB and elemental hydrogen. The presence of an aluminum center bonded to multiple AB residues might combine the efficiency of AB dehydrogenation with an aluminum mediated hydrogenation process leading to reversibility. The Al-AB complexes have comparable hydrogen capacity with other M-AB and have potential to meet DOE’s 2010 and 2015 targets for system wt%.

Hawthorne, M. Frederick; Jalisatgi, Satish S.; Safronov, Alexander V.; Lee, Han Beak; Wu, Jianguo

2010-10-01T23:59:59.000Z

203

Alleviation of aluminum toxicity by phosphogypsum  

SciTech Connect

Effects of phosphogypsum (PG) on subsoil solution properties and aluminum (Al) speciation were evaluated in this study. A subsoil sample from the Appling series (Typic Hapludults) was treated with either increasing levels of PG (2, 5, and 10 Mg ha{sup {minus}1} PG), reagent-grade CaSo{sub 4}{center dot}2H{sub 2}O (2 Mg ha{sup {minus}1}), or CaCl{sub 2}{center dot}2H{sub 2}O (2 Mg ha{sup {minus}1}) and incubated (22 {plus minus} 2{degree}C) at {minus}0.01 MPa moisture potential. Soil solution pH was 5.67 in untreated soil, while increasing application of PG from 2 to 10 Mg ha{sup {minus}1} decreased the soil solution pH from 5.08 to 4.47. The soil solution pH was higher in soils treated with similar rates of PG or CaSO{sub 4} {center dot}2H{sub 2}O than CaCl{sub 2}{center dot}2H{sub 2}O. Increasing levels of PG increased the concentrations of Ca, Mg, K, P, Na, Si, Mn, F and SO{sub 4} in the soil solution. The concentration of total Al in soil solution was 0.02, 1.95 and 5,25 ppm in soils treated with 2, 5 and 10 Mg ha{sup {minus}1} PG, respectively. However, Al speciation predicted by the GEOCHEM computer program revealed that at the 5 Mg ha{sup {minus}1} PG treatment, 99% and 0.6% of total Al was complexed with F and SO{sub 4}, respectively, while only 0.3% was in Al{sup 3+} form. At the 10T ha{sup {minus}1} PG treatment, although 10% of total Al was in Al{sup 3+} form, the activity of Al{sup 3+} was only 0.11 ppm. Therefore, an increase in concentrations of F and SO{sub 4} in soil solution in PG treated soils may alleviate Al toxicity by formation of less phytotoxic Al-F and Al-SO{sub 4} complexes. The toxicity of Al may be further decreased by further by a reduction in activity of Al{sup 3+} due to an increase in soil solution ionic strength in PG treated soils.

Alva, A.K.; Sumner, M.E.; Noble, A.D. (Univ. of Georgia, Athens (USA))

1988-01-01T23:59:59.000Z

204

Aluminum reduction cell electrode  

DOE Patents (OSTI)

The invention is directed to cathode modules comprised of refractory hard metal materials, such as TiB[sub 2], for an electrolytic cell for the reduction of alumina wherein the modules may be installed and replaced during operation of the cell and wherein the structure of the cathode modules is such that the refractory hard metal materials are not subjected to externally applied forces or rigid constraints. 9 figs.

Goodnow, W.H.; Payne, J.R.

1982-09-14T23:59:59.000Z

205

Aluminum: Industry of the future  

SciTech Connect

For over a century, the US aluminum industry has led the global market with advances in technology, product development, and marketing. Industry leaders recognize both the opportunities and challenges they face as they head into the 21st century, and that cooperative R and D is key to their success. In a unique partnership, aluminum industry leaders have teamed with the US Department of Energy`s Office of Industrial Technologies (OIT) to focus on innovative technologies that will help to strengthen the competitive position of the US aluminum industry and, at the same time, further important national goals. This industry-led partnership, the Aluminum Industry of the Future, promotes technologies that optimize the use of energy and materials in operations and reduce wastes and energy-related emissions. Led by The Aluminum Association, industry leaders began by developing a unified vision of future market, business, energy, and environmental goals. Their vision document, Partnerships for the Future, articulates a compelling vision for the next 20 years: to maintain and grow the aluminum industry through the manufacture and sale of competitively priced, socially desirable, and ecologically sustainable products. Continued global leadership in materials markets will require the combined resources of industry, universities, and government laboratories. By developing a unified vision, the aluminum industry has provided a framework for the next step in the Industries of the Future process, the development of a technology roadmap designed to facilitate cooperative R and D.

1998-11-01T23:59:59.000Z

206

Spray Rolling Aluminum Strip  

SciTech Connect

Spray forming is a competitive low-cost alternative to ingot metallurgy for manufacturing ferrous and non-ferrous alloy shapes. It produces materials with a reduced number of processing steps, while maintaining materials properties, with the possibility of near-net-shape manufacturing. However, there are several hurdles to large-scale commercial adoption of spray forming: 1) ensuring strip is consistently flat, 2) eliminating porosity, particularly at the deposit/substrate interface, and 3) improving material yield. Through this program, a new strip/sheet casting process, termed spray rolling, has been developed, which is an innovative manufacturing technique to produce aluminum net-shape products. Spray rolling combines the benefits of twin-roll casting and conventional spray forming, showing a promising potential to overcome the above hurdles associated with spray forming. Spray rolling requires less energy and generates less scrap than conventional processes and, consequently, enables the development of materials with lower environmental impacts in both processing and final products. Spray Rolling was developed as a collaborative project between the University of California-Davis, the Colorado School of Mines, the Idaho National Engineering and Environmental Laboratory, and an industry team. The following objectives of this project were achieved: (1) Demonstration of the feasibility of the spray rolling process at the bench-scale level and evaluation of the materials properties of spray rolled aluminum strip alloys; and (2) Demonstration of 2X scalability of the process and documentation of technical hurdles to further scale up and initiate technology transfer to industry for eventual commercialization of the process.

Lavernia, E.J.; Delplanque, J-P; McHugh, K.M.

2006-05-10T23:59:59.000Z

207

Bulk Metallic Glasses VII  

Science Conference Proceedings (OSTI)

Sponsorship, The Minerals, Metals and Materials Society ... Air-Oxidation of a ( Zr55Cu30Al10Ni5)98Er2 Bulk Metallic Glass at 350-500oc · Anelastic ...

208

Quinary metallic glass alloys  

DOE Patents (OSTI)

At least quinary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10{sup 3}K/s. Such alloys comprise zirconium and/or hafnium in the range of 45 to 65 atomic percent, titanium and/or niobium in the range of 4 to 7.5 atomic percent, and aluminum and/or zinc in the range of 5 to 15 atomic percent. The balance of the alloy compositions comprise copper, iron, and cobalt and/or nickel. The composition is constrained such that the atomic percentage of iron is less than 10 percent. Further, the ratio of copper to nickel and/or cobalt is in the range of from 1:2 to 2:1. The alloy composition formula is: (Zr,Hf){sub a}(Al,Zn){sub b}(Ti,Nb){sub c}(Cu{sub x}Fe{sub y}(Ni,Co){sub z}){sub d} wherein the constraints upon the formula are: a ranges from 45 to 65 atomic percent, b ranges from 5 to 15 atomic percent, c ranges from 4 to 7.5 atomic percent, d comprises the balance, d{hor_ellipsis}y is less than 10 atomic percent, and x/z ranges from 0.5 to 2.

Lin, X.; Johnson, W.L.

1998-04-07T23:59:59.000Z

209

Quinary metallic glass alloys  

DOE Patents (OSTI)

At least quinary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise zirconium and/or hafnium in the range of 45 to 65 atomic percent, titanium and/or niobium in the range of 4 to 7.5 atomic percent, and aluminum and/or zinc in the range of 5 to 15 atomic percent. The balance of the alloy compositions comprise copper, iron, and cobalt and/or nickel. The composition is constrained such that the atomic percentage of iron is less than 10 percent. Further, the ratio of copper to nickel and/or cobalt is in the range of from 1:2 to 2:1. The alloy composition formula is: (Zr,Hf).sub.a (Al,Zn).sub.b (Ti,Nb).sub.c (Cu.sub.x Fe.sub.y (Ni,Co).sub.z).sub.d wherein the constraints upon the formula are: a ranges from 45 to 65 atomic percent, b ranges from 5 to 15 atomic percent, c ranges from 4 to 7.5 atomic percent, d comprises the balance, d.multidot.y is less than 10 atomic percent, and x/z ranges from 0.5 to 2.

Lin, Xianghong (Pasadena, CA); Johnson, William L. (Pasadena, CA)

1998-01-01T23:59:59.000Z

210

Electrodeposition of cobalt and cobalt-aluminum alloys from a room temperature chloroaluminate molten salt  

Science Conference Proceedings (OSTI)

The electrodeposition of magnetic cobalt-aluminum alloys was investigated in the Lewis acidic aluminum chloride-1-methyl-3-ethylimidazolium chloride [60.0--40.0 mole percent (m/o)] molten salt containing electrogenerated Co(II) at 25 C. rotating disk electrode voltammetry indicated that it is possible to produce alloy deposits containing up to 62 atomic (a/o) aluminum at potentials positive of that for the bulk deposition of aluminum. The onset of the underpotential-driven aluminum codeposition process occurred at around 0.40 V vs. the Al/Al(III) couple in a 5.00 mmol/liter Co(II) solution but decreased as the Co(II) concentration increased. The Co-Al alloy composition displayed an inverse dependence on the Co(II) concentration but tended to become independent of concentration as the potential was decreased to 0 V. A rotating ring-disk electrode voltammetry technique was developed to analyze the composition and structure of the Co-Al alloy deposits. This technique takes advantage of the fact that the mass-transport-limited reduction of cobalt(II) occurs at potentials considerably more positive than that at which aluminum codeposition occurs. Scanning electron microscopy and energy dispersive X-ray analysis of bulk electrodeposits revealed that deposit morphology depends strongly upon aluminum content/deposition potential; deposits produced at 0.40 V from 50.0 mmol/liter Co(II) solutions consisted of 10 to 20 {micro}m diam multifaceted nodules of pure hcp cobalt, whereas those obtained at 0.20 V were dense and fine grained, containing about 4 a/o Al. Deposits produced at 0 V had the visual appearance of a loosely adherent black powder. X-ray diffraction measurements revealed a lattice expansion and a decrease in grain size as the hcp cobalt was alloyed with increasing amounts of aluminum.

Mitchell, J.A.; Pitner, W.R.; Hussey, C.L. [Univ. of Mississippi, University, MS (United States). Dept. of Chemistry; Stafford, G.R. [National Inst. of Standards and Technology, Gaithersburg, MD (United States). Materials Science and Engineering Lab.

1996-11-01T23:59:59.000Z

211

Metal versus rare-gas ion irradiation during Ti{sub 1-x}Al{sub x}N film growth by hybrid high power pulsed magnetron/dc magnetron co-sputtering using synchronized pulsed substrate bias  

Science Conference Proceedings (OSTI)

Metastable NaCl-structure Ti{sub 1-x}Al{sub x}N is employed as a model system to probe the effects of metal versus rare-gas ion irradiation during film growth using reactive high-power pulsed magnetron sputtering (HIPIMS) of Al and dc magnetron sputtering of Ti. The alloy film composition is chosen to be x = 0.61, near the kinetic solubility limit at the growth temperature of 500 Degree-Sign C. Three sets of experiments are carried out: a -60 V substrate bias is applied either continuously, in synchronous with the full HIPIMS pulse, or in synchronous only with the metal-rich-plasma portion of the HIPIMS pulse. Alloy films grown under continuous dc bias exhibit a thickness-invariant small-grain, two-phase nanostructure (wurtzite AlN and cubic Ti{sub 1-x}Al{sub x}N) with random orientation, due primarily to intense Ar{sup +} irradiation leading to Ar incorporation (0.2 at. %), high compressive stress (-4.6 GPa), and material loss by resputtering. Synchronizing the bias with the full HIPIMS pulse results in films that exhibit much lower stress levels (-1.8 GPa) with no measureable Ar incorporation, larger grains elongated in the growth direction, a very small volume fraction of wurtzite AlN, and random orientation. By synchronizing the bias with the metal-plasma phase of the HIPIMS pulses, energetic Ar{sup +} ion bombardment is greatly reduced in favor of irradiation predominantly by Al{sup +} ions. The resulting films are single phase with a dense competitive columnar structure, strong 111 orientation, no measureable trapped Ar concentration, and even lower stress (-0.9 GPa). Thus, switching from Ar{sup +} to Al{sup +} bombardment, while maintaining the same integrated incident ion/metal ratio, eliminates phase separation, minimizes renucleation during growth, and reduces the high concentration of residual point defects, which give rise to compressive stress.

Greczynski, Grzegorz; Lu Jun; Jensen, Jens; Petrov, Ivan; Greene, Joseph E.; Bolz, Stephan; Koelker, Werner; Schiffers, Christoph; Lemmer, Oliver; Hultman, Lars [Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden) and Materials Science Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden); Materials Science Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States) and Department of Physics, University of Illinois, Urbana, Illinois 61801 (United States); CemeCon AG, Adenauerstr. 20 A4, D-52146 Wurselen (Germany); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden)

2012-11-15T23:59:59.000Z

212

Metal Matrix Composites II  

Science Conference Proceedings (OSTI)

Oct 29, 2013... of Al-AC8H/Al2O3p Metal Matrix Composites Produced by Stir Casting Route: Anne Zulfia1; Maman Ajiriyanto1; 1University of Indonesia

213

Characterizing Microalgae (Nannochloris oculata) Harvesting by Aluminum Flocculation  

E-Print Network (OSTI)

Recent progress in algae biotechnology indicates that microalgae have the potential of becoming a significant source for food, feed proteins, nutraceuticals, and lipids for biofuels. Typically low concentrations of microalgae cultures (less than 2 g/L) make harvesting of algae biomass one of the key economic bottlenecks for microalgae production of biofuels and bioproducts. Among the various biomass harvesting options currently under consideration, flocculation appears to be the least expensive and most flexible method for harvesting and initial concentration of dilute algal cultures. In addition to initial biomass concentration, processing factors that could also affect harvesting efficiency include culture pH, flocculant dosage, and media ionic strength (conductivity). This thesis reviews challenges of harvesting and concentration of green microalgae and examines the effect of pH, flocculant dosage, and culture conductivity on charge neutralization and flocculation of Nannochloris oculata by aluminum chloride. N. oculata flocculation was studied by manipulating the culture pH and ionic strength before the addition of aluminum chloride. The removal efficiency, concentration factor, settling rate, and zeta potential of the culture were measured to assess the effect of processing variables and understand mechanisms that govern N. oculata flocculation by aluminum chloride. Flocculation tests conducted with culture concentrations of 10^7 cells/ml revealed that AlCl3 concentration of 0.05 g/L and flocculation pH of 5.3 were optimal conditions for achieving 100% removal efficiency and a twentyfold algae concentration. At flocculant concentrations greater than 0.05 g/L, removal efficiencies were equally good but resulting concentration factors decreased with increasing AlCl3 dosage. Zeta potential measurements were correlated with flocculation dosage, initial cell concentration, medium pH, and aluminum solubility curves to conclude that densely charged multi-valent aluminum hydroxide species were responsible for the efficient flocculation at pH 5.3 with 0.05 g/L AlCl3.

Davis, Ryan T.

2011-12-01T23:59:59.000Z

214

Air-Oxidation of a (Zr55Cu30Al10Ni5)98Er2 Bulk Metallic Glass at ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Bulk Metallic Glasses VII. Presentation Title, Air-Oxidation of a ...

215

It's Elemental - The Element Aluminum  

NLE Websites -- All DOE Office Websites (Extended Search)

Company of America, or Alcoa. When it opened, his company could produce about 25 kilograms of aluminum a day. By 1909, his company was producing about 41,000 kilograms of...

216

Responses of soil microbial and nematode communities to aluminum toxicity in vegetated oil-shale-waste lands  

E-Print Network (OSTI)

Responses of soil microbial and nematode communities to aluminum toxicity in vegetated oil-shale and total Al concentrations showed a significant decrease after planting S. cumini plantation onto the shale

Neher, Deborah A.

217

Salt-soda sinter process for recovering aluminum from fly ash  

DOE Patents (OSTI)

A method for recovering aluminum values from fly ash comprises sintering the fly ash with a mixture of NaCl and Na.sub.2 CO.sub.3 to a temperature in the range 700.degree.-900.degree. C. for a period of time sufficient to convert greater than 90% of the aluminum content of the fly ash into an acid-soluble fraction and then contacting the thus-treated fraction with an aqueous solution of nitric or sulfuric acid to effect dissolution of aluminum and other metal values in said solution.

McDowell, William J. (Oak Ridge, TN); Seeley, Forest G. (Oak Ridge, TN)

1981-01-01T23:59:59.000Z

218

Coated Metal Articles and Method of Making  

DOE Patents (OSTI)

The method of protectively coating metallic uranium which comprises dipping the metallic uranium in a molten alloy comprising about 20-75% of copper and about 80-25% of tin, dipping the coated uranium promptly into molten tin, withdrawing it from the molten tin and removing excess molten metal, thereupon dipping it into a molten metal bath comprising aluminum until it is coated with this metal, then promptly withdrawing it from the bath.

Boller, Ernest R.; Eubank, Lowell D.

2004-07-06T23:59:59.000Z

219

Chemical vapor depositing of metal fluorides  

Science Conference Proceedings (OSTI)

High Purity BeF2 and BeF2–AlF3glasses have been deposited by the chemical vapor deposition technique using beryllium and aluminum 1

A. Sarhangi; J. M. Power

1992-01-01T23:59:59.000Z

220

Transition metal-free olefin polymerization catalyst  

DOE Patents (OSTI)

Ethylene and/or propylene are polymerized to form high molecular weight, linear polymers by contacting ethylene and/or propylene monomer, in the presence of an inert reaction medium, with a catalyst system which consists essentially of (1) an aluminum alkyl component, such as trimethylaluminum, triethylaluminum, triisobutylaluminum, tri-n-octylaluminum and diethylaluminum hydride and (2) a Lewis acid or Lewis acid derivative component, such as B (C.sub.6 F.sub.5).sub.3, [(CH.sub.3).sub.2 N (H) (C.sub.6 H.sub.5)].sup.+ [B (C.sub.6 F.sub.5)4].sup.-, [(C.sub.2 H.sub.5).sub.3 NH].sup.+ [B C.sub.6 F.sub.5).sub.4 ],.sup.-, [C(C.sub.6 F.sub.5).sub.3 ].sup.+ [B(C.sub.6 F.sub.5).sub.4 ].sup.-, (C.sub.2 H.sub.5).sub.2 Al(OCH.sub.3), (C.sub.2 H.sub.5).sub.2 Al(2,6-di-t-butyl-4-methylphenoxide), (C.sub.2 H.sub.5)Al(2,6 -di-t-butylphenoxide).sub.2, (C.sub.2 H.sub.5).sub.2 Al(2,6-di-t-butylphonoxide) , 2,6 -di-t-butylphenol.multidot.methylaluminoxane or an alkylaluminoxane, and which may be completely free any transition metal component(s).

Sen, Ayusman (State College, PA); Wojcinski, II, Louis M. (State College, PA); Liu, Shengsheng (State College, PA)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

A Chlorine–Free Technology for Metal Treatment - Programmaster.org  

Science Conference Proceedings (OSTI)

Presentation Title, In-Line Salt-ACDTM: A Chlorine–Free Technology for Metal ... in replacement of chlorine gas, was introduced to the aluminum industry [1].

222

Clean and cost-effective dry boundary lubricants for aluminum forming.  

DOE Green Energy (OSTI)

Preliminary research in our laboratory has demonstrated that boric acid is an effective lubricant with an unusual capacity to reduce sliding fiction (providing friction coefficients as low as 0.02) and wear of metallic and ceramic materials. More recent studies have revealed that water or methanol solutions of boric acid can be used to prepare strongly bonded layers of boric acid on aluminum surfaces. It appears that boric acid molecules have a strong tendency to bond chemically to the naturally oxidized surfaces of aluminum and its alloys and to make these surfaces very slippery. Recent metal formability tests indicated that the boric acid films formed on aluminum surfaces by spraying or dipping worked quite well; improving draw scale performance by 58 to 75%. These findings have increased the prospect that boric acid can be formulated and optimized as an effective boundary lubricant and used to solve the friction, galling, and severe wear problems currently encountered in cold-forming of aluminum products. Accordingly, the major goal of this paper is to demonstrate the usefulness and lubrication capacity of thin boric acid films formed on aluminum surfaces by simple dipping or spraying processes and to describe the lubrication mechanisms under typical metal forming conditions. We will also examine the nature of chemical bonding between boric acid and aluminum surfaces and develop new ways to optimize its performance as an effective boundary lubricant.

Erdemir, A.; Fenske, G. R.

1997-12-05T23:59:59.000Z

223

Evaluation of neutron absorbers for the melt-dilute treatment of aluminum-based spent fuel  

SciTech Connect

Aluminum-based spent nuclear fuel (Al-SNF) from foreign and domestic research reactors is being consolidated at the Savannah River Site (SRS) for ultimate disposal in the Mined Geologic Disposal System (MGDS). Most of the aluminum-based fuel material contains highly enriched uranium (HEU) (greater than 20 percent {sup 235}U), which poses a proliferation risk and challenges the preclusion of criticality events for disposal periods exceeding 10,000 years.

Vinson, D.W.

2000-03-31T23:59:59.000Z

224

Metal-ceramic joint assembly  

DOE Patents (OSTI)

A metal-ceramic joint assembly in which a brazing alloy is situated between metallic and ceramic members. The metallic member is either an aluminum-containing stainless steel, a high chromium-content ferritic stainless steel or an iron nickel alloy with a corrosion protection coating. The brazing alloy, in turn, is either an Au-based or Ni-based alloy with a brazing temperature in the range of 9500 to 1200.degree. C.

Li, Jian (New Milford, CT)

2002-01-01T23:59:59.000Z

225

Melt Conditioned Casting of Aluminum Alloys - Programmaster.org  

Science Conference Proceedings (OSTI)

Capillary Tube Fabrication of A3003 Alloy for Air Condition · Cathodic Dissolution of Pure Aluminum, Aluminum Alloy AA6061 and Aluminum Particle Based ...

226

Commonwealth Aluminum: Manufacturer Conducts Plant-Wide Energy Assessments at Two Aluminum Sheet Production Operations;  

SciTech Connect

DOE Industrial Technologies Program case study describes the savings possible if Commonwealth Aluminum (now Aleris Rolled Products) makes improvements noted in energy assessments at two aluminum mills.

Not Available

2006-04-01T23:59:59.000Z

227

Reduction of Oxidative Melt Loss of Aluminum and Its Alloys  

Science Conference Proceedings (OSTI)

This project led to an improved understanding of the mechanisms of dross formation. The microstructural evolution in industrial dross samples was determined. Results suggested that dross that forms in layers with structure and composition determined by the local magnesium concentration alone. This finding is supported by fundamental studies of molten metal surfaces. X-ray photoelectron spectroscopy data revealed that only magnesium segregates to the molten aluminum alloy surface and reacts to form a growing oxide layer. X-ray diffraction techniques that were using to investigate an oxidizing molten aluminum alloy surface confirmed for the first time that magnesium oxide is the initial crystalline phase that forms during metal oxidation. The analytical techniques developed in this project are now available to investigate other molten metal surfaces. Based on the improved understanding of dross initiation, formation and growth, technology was developed to minimize melt loss. The concept is based on covering the molten metal surface with a reusable physical barrier. Tests in a laboratory-scale reverberatory furnace confirmed the results of bench-scale tests. The main highlights of the work done include: A clear understanding of the kinetics of dross formation and the effect of different alloying elements on dross formation was obtained. It was determined that the dross evolves in similar ways regardless of the aluminum alloy being melted and the results showed that amorphous aluminum nitride forms first, followed by amorphous magnesium oxide and crystalline magnesium oxide in all alloys that contain magnesium. Evaluation of the molten aluminum alloy surface during melting and holding indicated that magnesium oxide is the first crystalline phase to form during oxidation of a clean aluminum alloy surface. Based on dross evaluation and melt tests it became clear that the major contributing factor to aluminum alloy dross was in the alloys with Mg content. Mg was identified as the primary factor that accelerates dross formation specifically in the transition from two phases to three phase growth. Limiting magnesium oxidation on the surface of molten aluminum therefore becomes the key to minimizing melt loss, and technology was developed to prevent magnesium oxidation on the aluminum surface. This resulted in a lot of the work being focused on the control of Mg oxidation. Two potential molten metal covering agents that could inhibit dross formation during melting and holding consisting of boric acid and boron nitride were identified. The latter was discounted by industry as it resulted in Boron pick up by the melt beyond that allowed by specifications during plant trials. The understanding of the kinetics of dross formation by the industry partners helped them understand how temperature, alloy chemistry and furnace atmosphere (burner controls--e.g. excess air) effected dross formation. This enables them to introduce in their plant process changes that reduced unnecessary holding at high temperatures, control burner configurations, reduce door openings to avoid ingress of air and optimize charge mixes to ensure rapid melting and avoid excess oxidation.

Dr. Subodh K. Das; Shridas Ningileri

2006-03-17T23:59:59.000Z

228

Al99,5  

Science Conference Proceedings (OSTI)

High Strength Aluminum Brazing Sheets for Condenser Fins of Automotive Heat ... for the Phase Formation in a Wide Range of Commercial Aluminum Alloys.

229

Aluminum reduction cell electrode  

DOE Patents (OSTI)

The invention is directed to an anode-cathode structure for an electrolytic cell for the reduction of alumina wherein the structure is comprised of a carbon anode assembly which straddles a wedge-shaped refractory hard metal cathode assembly having steeply sloped cathodic surfaces, each cathodic surface being paired in essentially parallel planar relationship with an anode surface. The anode-cathode structure not only takes into account the structural weakness of refractory hard metal materials but also permits the changing of the RHM assembly during operation of the cell. Further, the anode-cathode structure enhances the removal of anode gas from the interpolar gap between the anode and cathode surfaces. 10 figs.

Payne, J.R.

1983-09-20T23:59:59.000Z

230

Plasma-enhanced and thermal atomic layer deposition of Al{sub 2}O{sub 3} using dimethylaluminum isopropoxide, [Al(CH{sub 3}){sub 2}({mu}-O{sup i}Pr)]{sub 2}, as an alternative aluminum precursor  

Science Conference Proceedings (OSTI)

The authors have been investigating the use of [Al(CH{sub 3}){sub 2}({mu}-O{sup i}Pr)]{sub 2} (DMAI) as an alternative Al precursor to [Al(CH{sub 3}){sub 3}] (TMA) for remote plasma-enhanced and thermal ALD over wide temperature ranges of 25-400 and 100-400 deg. C, respectively. The growth per cycle (GPC) obtained using in situ spectroscopic ellipsometry for plasma-enhanced ALD was 0.7-0.9 A/cycle, generally lower than the >0.9 A/cycle afforded by TMA. In contrast, the thermal process gave a higher GPC than TMA above 250 deg. C, but below this temperature, the GPC decreased rapidly with decreasing temperature. Quadrupole mass spectrometry data confirmed that both CH{sub 4} and HO{sup i}Pr were formed during the DMAI dose for both the plasma-enhanced and thermal processes. CH{sub 4} and HO{sup i}Pr were also formed during the H{sub 2}O dose but combustion-like products (CO{sub 2} and H{sub 2}O) were observed during the O{sub 2} plasma dose. Rutherford backscattering spectrometry showed that, for temperatures >100 deg. C and >200 deg. C for plasma-enhanced and thermal ALD, respectively, films from DMAI had an O/Al ratio of 1.5-1.6, a H content of {approx}5 at. % and mass densities of 2.7-3.0 g cm{sup -3}. The film compositions afforded from DMAI were comparable to those from TMA at deposition temperatures {>=}150 deg. C At lower temperatures, there were differences in O, H, and C incorporation. 30 nm thick Al{sub 2}O{sub 3} films from the plasma-enhanced ALD of DMAI were found to passivate n- and p-type Si floatzone wafers ({approx}3.5 and {approx}2 {Omega} cm, respectively) with effective carrier lifetimes comparable to those obtained using TMA. Surface recombination velocities of < 3 and < 6 cm s{sup -1} were obtained for the n- and p-type Si, respectively. Using these results, the film properties obtained using DMAI and TMA are compared and the mechanisms for the plasma-enhanced and thermal ALD using DMAI are discussed.

Potts, Stephen E.; Dingemans, Gijs; Lachaud, Christophe; Kessels, W. M. M. [Department of Applied Physics, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven (Netherlands); Air Liquide Research and Development, 1 Chemin de la Porte des Loges, BP 126, 78345 Jouy-en-Josas (France); Department of Applied Physics, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven (Netherlands)

2012-03-15T23:59:59.000Z

231

ALS Spectrum  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Spectrum Print Begun in 2007, ALS Spectrum is a publication that encapsulates the same type of information contained in the ALS Activity Report but in a short, readable,...

232

Aluminum sulfate (alum; Al2 O) is used as a  

E-Print Network (OSTI)

(biofilters usually use a compost mixture, whereas biotrickling filters use an inert packing) and the presence overall system performance. Also, there are a few unpublished reports that compost biofilters generated waste and food waste compost. The active compost sample was suspended in distilled water, large

Sparks, Donald L.

233

Aluminum hydrolysis constants to 250[degrees]C from boehmite solubility measurements  

SciTech Connect

Boehmite solubilities were measured at 150, 200, and 250[degrees]C at pH values from 1 to 10 at 100 bars total pressure and used to determine the stability constants for the mononuclear aluminum hydroxide complexes Al(OH)[sup 2+], Al(OH)[sup +][sub 2], Al(OH)[sub 0][sub 3], AL(OH)[sup -][sub 4], and the solubility product of boehmite. Buffer solutions of HCl-KCl, acetic acid-sodium acetate, sodium bicarbonate-carbonic acid, and boric acid-potassium hydroxide were used to control pH. Our solubility data are in good agreement with boehmite solubility measurements in perchloric acid and sodium hydroxide solutions reported by KUYUNKO et al. (1983). The stability constants for the aluminum hydroxide species were determined from the solubility data using a Ridge regression technique. The results indicate that aluminum ion hydrolysis becomes stronger at higher temperatures, and the stability field of the neutral complex Al(OH)[sup 0][sub 3] becomes larger. The results are used to provide a set of equilibrium constants for aluminum hydroxide complex formation and boehmite hydrolysis from 0-300[degrees]C.

Bourcier, W.L.; Knauss, K.G.; Jackson, K.J. (Lawrence Livermore National Lab., CA (United States))

1993-02-01T23:59:59.000Z

234

Electrolytic Cell For Production Of Aluminum From Alumina  

SciTech Connect

An electrolytic cell for producing aluminum from alumina having a reservoir for collecting molten aluminum remote from the electrolysis.

Bradford, Donald R (Underwood, WA); Barnett, Robert J. (Goldendale, WA); Mezner, Michael B. (Sandy, OR)

2004-11-02T23:59:59.000Z

235

TMS 2012 Industrial Aluminum Electrolysis Course Schedule  

Science Conference Proceedings (OSTI)

Sep 9, 2012 ... Temperature and Aluminum Fluoride. Barry Welch. 11:00 - 12:00. 10: Aluminum Fluoride Variations and Control. Barry Welch. 12:00 - 13:00.

236

Current technologies and trends of aluminum design  

E-Print Network (OSTI)

A literature review of current aluminum technology in the building and construction industry was carried out. Aluminum is an ideal material for building in corrosive environments and for building structures where small ...

Chen, Michael, 1981-

2004-01-01T23:59:59.000Z

237

Aluminum-carbon composite electrode  

DOE Patents (OSTI)

A high performance double layer capacitor having an electric double layer formed in the interface between activated carbon and an electrolyte is disclosed. The high performance double layer capacitor includes a pair of aluminum impregnated carbon composite electrodes having an evenly distributed and continuous path of aluminum impregnated within an activated carbon fiber preform saturated with a high performance electrolytic solution. The high performance double layer capacitor is capable of delivering at least 5 Wh/kg of useful energy at power ratings of at least 600 W/kg.

Farahmandi, C. Joseph (Auburn, AL); Dispennette, John M. (Auburn, AL)

1998-07-07T23:59:59.000Z

238

ALS Spectrum  

NLE Websites -- All DOE Office Websites (Extended Search)

Spectrum Print Begun in 2007, ALS Spectrum is a publication that encapsulates the same type of information contained in the ALS Activity Report but in a short, readable,...

239

TMS Short Course: Industrial Aluminum Electrolysis 2010  

Science Conference Proceedings (OSTI)

... Electrolyte Compositions; Fluoride Emissions Control; Graphite Resistor and Gas ... the Variability and Control of Temperature and Aluminum Fluoride in Cells  ...

240

2013 TMS Industrial Aluminum Electrolysis Course  

Science Conference Proceedings (OSTI)

Aluminum Fluoride Variations and Control; Anode Cover; Anode Effect Mechanism and PFC Emission Rates; Anodes in Cells - Their Reactions and ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Expansion and Collapse of Liquid Aluminum Foams  

Science Conference Proceedings (OSTI)

ESP Dust Recovery Process Test Works, Plant Trial, Commissioning, Operations and Metallurgical Performance · Expansion and Collapse of Liquid Aluminum ...

242

Aluminum Production Paths in the New Millennium  

Science Conference Proceedings (OSTI)

Electrochemical technologies face the same problems and challenges as present ... The driving force for developing new processes for aluminum smelting ...

243

TMS 2010 Networking Events: Aluminum Plenary  

Science Conference Proceedings (OSTI)

TMS Home · Contact Us ... Technical Divisions Home .... Challenges and Opportunities Relative to Increased Usage of Aluminum within the Automotive Industry

244

Oxide Skin Strength Measurements on Molten Aluminum  

Science Conference Proceedings (OSTI)

Presentation Title, OXIDE SKIN STRENGTH MEASUREMENTS ON MOLTEN ALUMINUM – MANGANESE ALLOYS WITH AND WITHOUT SALT ON SURFACE

245

Aluminum Alloys: Fabrication, Characterization and Applications ...  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... Program Organizers: Zhengdong (Steven) Long, Kaiser Aluminum; Subodh Das, Phinix LLC; Tongguang Zhai, University of Kentucky; William ...

246

REQUEST BY ALUMINUM COMPANY OF AMERICA FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN RIGHTS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SS796C; DOE WAIVER DOCKET W(A)-96-022[ORO- SS796C; DOE WAIVER DOCKET W(A)-96-022[ORO- 637] Aluminum Company of America (Alcoa) has made a timely request for an advance waiver to worldwide rights in Subject Inventions made in the course of or under Department of Energy (DOE) Contract No. DE-AC05-840R21400; Subcontract No. 86X-SS796C. The scope of the work calls for the development of processes for forming aluminum auto parts to make the use of aluminum in the industry feasible and cost effective. Alcoa will be assisting the Department of Energy in developing advanced materials for the automobile industry, namely to develop Semi-Solid Metal (SSM) technology to produce new and existing light weight aluminum alloy castings having greater than fifteen percent ductility. The United States Automotive Materials Partnership (USAMP) will assist Alcoa on an

247

Commercial Aluminum-Lithium Alloys  

Science Conference Proceedings (OSTI)

Table 8   Typical physical properties of selected aluminum-lithium alloys...-742 Elastic modulus, GPa (10 6 psi) 76 (11.0) 75 (10.9) 77 (11.2) Poisson's ratio 0.34 � � (a) Measured per ASTM G 60

248

Formation of metal oxides by cathodic arc deposition  

DOE Green Energy (OSTI)

Metal oxide thin films are of interest for a number of applications. Cathodic arc deposition, an established, industrially applied technique for formation of nitrides (e.g. TiN), can also be used for metal oxide thin film formation. A cathodic arc plasma source with desired cathode material is operated in an oxygen atmosphere, and metal oxides of various stoichiometric composition can be formed on different substrates. We report here on a series of experiments on metal oxide formation by cathodic arc deposition for different applications. Black copper oxide has been deposited on ALS components to increase the radiative heat transfer between the parts. Various metal oxides such as tungsten oxide, niobium oxide, nickel oxide and vanadium oxide have been deposited on ITO glass to form electrochromic films for window applications. Tantalum oxide films are of interest for replacing polymer electrolytes. Optical waveguide structures can be formed by refractive index variation using oxide multilayers. We have synthesized multilayers of Al{sub 2}O{sub 3}/Y{sub 2}O{sub 3}/AI{sub 2}O{sub 3}/Si as possible basic structures for passive optoelectronic integrated circuits, and Al{sub 2-x}Er{sub x}O{sub 3} thin films with a variable Er concentration which is a potential component layer for the production of active optoelectronic integrated devices such as amplifiers or lasers at a wavelength of 1.53 {mu}m. Aluminum and chromium oxide films have been deposited on a number of substrates to impart improved corrosion resistance at high temperature. Titanium sub-oxides which are electrically conductive and corrosion resistant and stable in a number of aggressive environments have been deposited on various substrates. These sub-oxides are of great interest for use in electrochemical cells.

Anders, S.; Anders, A.; Rubin, M.; Wang, Z.; Raoux, S.; Kong, F.; Brown, I.G.

1995-03-01T23:59:59.000Z

249

Amorphous Metallic Glass as New High Power and Energy Density Anodes For Lithium Ion Rechargeable Batteries  

E-Print Network (OSTI)

We have investigated the use of aluminum based amorphous metallic glass as the anode in lithium ion rechargeable batteries. Amorphous metallic glasses have no long-range ordered microstructure; the atoms are less closely ...

Meng, Shirley Y.

250

HIGH ALUMINUM HLW GLASSES FOR HANFORDS WTP  

Science Conference Proceedings (OSTI)

The world's largest radioactive waste vitrification facility is now under construction at the United State Department of Energy's (DOE's) Hanford site. The Hanford Tank Waste Treatment and Immobilization Plant (WTP) is designed to treat nearly 53 million gallons of mixed hazardous and radioactive waste now residing in 177 underground storage tanks. This multi-decade processing campaign will be one of the most complex ever undertaken because of the wide chemical and physical variability of the waste compositions generated during the cold war era that are stored at Hanford. The DOE Office of River Protection (ORP) has initiated a program to improve the long-term operating efficiency of the WTP vitrification plants with the objective of reducing the overall cost of tank waste treatment and disposal and shortening the duration of plant operations. Due to the size, complexity and duration of the WTP mission, the lifecycle operating and waste disposal costs are substantial. As a result, gains in High Level Waste (HLW) and Low Activity Waste (LAW) waste loadings, as well as increases in glass production rate, which can reduce mission duration and glass volumes for disposal, can yield substantial overall cost savings. EnergySolutions and its long-term research partner, the Vitreous State Laboratory (VSL) of the Catholic University of America, have been involved in a multi-year ORP program directed at optimizing various aspects of the HLW and LAW vitrification flow sheets. A number of Hanford HLW streams contain high concentrations of aluminum, which is challenging with respect to both waste loading and processing rate. Therefore, a key focus area of the ORP vitrification process optimization program at EnergySolutions and VSL has been development of HLW glass compositions that can accommodate high Al{sub 2}O{sub 3} concentrations while maintaining high processing rates in the Joule Heated Ceramic Melters (JHCMs) used for waste vitrification at the WTP. This paper, reviews the achievements of this program with emphasis on the recent enhancements in Al{sub 2}O{sub 3} loadings in HLW glass and its processing characteristics. Glass formulation development included crucible-scale preparation and characterization of glass samples to assess compliance with all melt processing and product quality requirements, followed by small-scale screening tests to estimate processing rates. These results were used to down-select formulations for subsequent engineering-scale melter testing. Finally, further testing was performed on the DM1200 vitrification system installed at VSL, which is a one-third scale (1.20 m{sup 2}) pilot melter for the WTP HLW melters and which is fitted with a fully prototypical off-gas treatment system. These tests employed glass formulations with high waste loadings and Al{sub 2}O{sub 3} contents of {approx}25 wt%, which represents a near-doubling of the present WTP baseline maximum Al{sub 2}O{sub 3} loading. In addition, these formulations were processed successfully at glass production rates that exceeded the present requirements for WTP HLW vitrification by up to 88%. The higher aluminum loading in the HLW glass has an added benefit in that the aluminum leaching requirements in pretreatment are reduced, thus allowing less sodium addition in pretreatment, which in turn reduces the amount of LAW glass to be produced at the WTP. The impact of the results from this ORP program in reducing the overall cost and schedule for the Hanford waste treatment mission will be discussed.

KRUGER AA; JOSEPH I; BOWMAN BW; GAN H; KOT W; MATLACK KS; PEGG IL

2009-08-19T23:59:59.000Z

251

METAL COATING BATHS  

DOE Patents (OSTI)

A method is presented for restoring the effectiveness of bronze coating baths used for hot dip coating of uranium. Such baths, containing a high proportion of copper, lose their ability to wet uranium surfaces after a period of use. The ability of such a bath to wet uranium can be restored by adding a small amount of metallic aluminum to the bath, and skimming the resultant hard alloy from the surface.

Robinson, J.W.

1958-08-26T23:59:59.000Z

252

EVALUATION OF LOW TEMPERATURE ALUMINUM DISSOLUTION IN TANK 51  

Science Conference Proceedings (OSTI)

Liquid Waste Organization (LWO) identified aluminum dissolution as a method to mitigate the effect of having about 50% more solids in High Level Waste (HLW) sludge than previously planned. Previous aluminum dissolution performed in a HLW tank in 1982 was performed at approximately 85 C for 5 days, which became the baseline aluminum dissolution process. LWO initiated a project to modify a waste tank to meet these requirements. Subsequent to an alternative evaluation, LWO management identified an opportunity to perform aluminum dissolution on sludge destined for Sludge Batch 5, but within a limited window that would not allow time for any modifications for tank heating. A variation of the baseline process, dubbed Low Temperature Aluminum Dissolution (LTAD), was developed based on the constraint of available energy input in Tank 51 and the window of opportunity, but was not constrained to a minimum extent of dissolution, i.e. dissolve as much aluminum as possible within the time available. This process was intended to operate between 55 and 70 C, but for a significantly longer time than the baseline process. LTAD proceeded in parallel with the baseline project. The preliminary evaluation at the completion of LTAD focused on the material balance and extent of the aluminum dissolved. The range of values of extent of dissolution, 56% to 64%, resulted from the variation in liquid phase sample data available at the time. Additional solid phase data is available from a sample taken after LTAD to refine this range. This report provides additional detailed evaluation of the LTAD process based on analytical and field data and includes: a summary of the process chronology; a determination of an acceptable blending strategy for the aluminum-laden supernate stored in Tank 11; an update to the determination of aluminum dissolved using more complete sample results; a determination of the effect of LTAD on uranium, plutonium, and other metals; a determination of the rate of heat loss from a quiescent tank; and an evaluation of the aluminum dissolution rate model and actual dissolution rate. LTAD was successfully completed in Tank 51 with minimal waste tank changes. The following general conclusions may be drawn about the LTAD process: (1) Dissolution at about 60 C for 46 days dissolved 64% of the aluminum from the sludge slurry. (2) The aluminum-laden leach solution decanted to Tank 11 can be blended with a wide variety of supernates without risk of precipitating the dissolved aluminum based on thermodynamic chemical equilibrium models. (3) Uranium and plutonium leached into solution without corresponding leaching of iron or metal other than aluminum, but the total mass leached was a small fraction of the total uranium and plutonium in the sludge. (4) The concentration of uranium and plutonium in the leach solution was indistinguishable from other tank farm supernates, thus, the leach solutions can be managed relative to the risk of criticality like any other supernate. (5) A small amount of mercury leached into solution from the sludge causing the liquid phase concentration to increase 6 to 10 fold, which is consistent with the 4 to 14 fold increase observed during the 1982 aluminum dissolution demonstration. (6) Chromium did not dissolve during LTAD. (7) Chloride concentration increased in the liquid phase during LTAD due to chloride contamination in the 50% sodium hydroxide solution. (8) The rate of heat loss from Tank 51 at temperatures above 45 C appeared linear and predictable at 8E+7 cal/hr. (9) The rate of heat transfer from Tank 51 did not follow a simplified bulk heat transfer model. (10) Prediction of the aluminum dissolution rate was prone to error due to a lack of active specific surface area data of sludge particles. (11) The higher than expected dissolution rate during LTAD was likely due to smaller than expected particle sizes of most of the sludge particles. While evaluating the LTAD process, the dissolved salt solution from Tank 41 that was stored and sampled in Tank 49 was determined to be supersaturated relative to alu

Pike, J

2008-09-04T23:59:59.000Z

253

Infrared spectra of the photosorption products of hydrogen and carbon monoxide on Al/sub 2/O/sub 3/ and SiO/sub 2/ containing transition-metal ions  

Science Conference Proceedings (OSTI)

It has been demonstrated by IR spectroscopy that the irradiation of samples of V/sup 5 +//SiO/sub 2/, V/sup 5 +//Al/sub 2/O/sub 3/, and Ni/sup 2 +//Al/sub 2/O/sub 3/ in an atmosphere of D/sub 2/ causes the isotope replacement of hydrogen atoms of the hydroxyl groups on the surface of the support and results in the formation of OD groups on photoinduced V/sup 4 +/O/sup -/ sites. Molecules of CO are photosorbed both on reduced ions of transition metals in the form of M-CVertical BarO surface carbonyls and on O/sup -/ ions. In the latter case, CO/sub 2/, which is easily desorbed from V/sup 5 +//SiO/sub 2/, but is tightly bound to V/sup 5 +//Al/sub 2/O/sub 3/ owing to the chemisorption on the surface of the support, is formed on the samples containing vanadium.

Gerasimov, S.F.; Filimonov, V.N.

1981-10-01T23:59:59.000Z

254

Analysis of particle penetration into aluminum plate using underwater shock wave  

Science Conference Proceedings (OSTI)

Some techniques using underwater shock waves have been developed for several material processing applications: explosive welding, shock compaction, and shock synthesis. In this research, a new technique was developed for surface modification of an aluminum plate. Diamond particles were accelerated by an underwater shock wave and penetrated into an aluminum plate, creating a surface coating of diamond on the aluminum plate. In the observation of the cross-section of the recovered Al-diamond composite, a rich diamond layer was confirmed at about 200 {mu}m depth. XRD and wear measurements were conducted for the recovered Al-diamond composite. We also report on the optical observation of the underwater shock wave in this paper.

Tanaka, S. [Faculty of engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan); Hokamoto, K.; Itoh, S. [Shock Wave and Condensed Matter Research Center, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan)

2007-12-12T23:59:59.000Z

255

Determination of Stability Constants of Hydrogen and Aluminum Fluorides with a Fluoride-Selective Electrode  

DOE Green Energy (OSTI)

The ability to directly determine free fluoride ion concentration (or mean activity) simplifies gathering and interpretation of experimental data for studies of metal complexes. In this work, the new lanthanum fluoride electrode was used to measure free fluoride ion in an investigation of the hydrogen-fluoride and aluminum-fluoride systems in NH4NO3.

Baumann, E.W.

2003-01-06T23:59:59.000Z

256

Reduced temperature aluminum production in an electrolytic cell having an inert anode  

DOE Patents (OSTI)

Aluminum is produced by electrolytic reduction of alumina in a cell having a cathode, an inert anode and a molten salt bath containing metal fluorides and alumina. The inert anode preferably contains copper, silver and oxides of iron and nickel. Reducing the molten salt bath temperature to about 900-950.degree. C. lowers corrosion on the inert anode constituents.

Dawless, Robert K. (Monroeville, PA); Ray, Siba P. (Murrysville, PA); Hosler, Robert B. (Sarver, PA); Kozarek, Robert L. (Apollo, PA); LaCamera, Alfred F. (Trafford, PA)

2000-01-01T23:59:59.000Z

257

Electrochemical Investigation of Li–Al Anodes in Oligo(ethylene glycol) Dimethyl Ether/LiPF6  

DOE Green Energy (OSTI)

1 M LiPF{sub 6} dissolved in oligo(ethylene glycol) dimethyl ether with a molecular weight 500 g mol{sup -1} was investigated as a new electrolyte (OEGDME500, 1 M LiPF{sub 6}) for metal deposition and battery applications. At 25 C a conductivity of 0.48 x 10{sup -3} S cm{sup -1} was obtained and at 85 C, 3.78 x 10{sup -3} S cm{sup -1}. The apparent activation barrier for ionic transport was evaluated to be 30.7 kJ mol{sup -1}. OEGDME500, 1 M LiPF{sub 6} allows operating temperature above 100 C with very attractive conductivity. The electrolyte shows excellent performance at negative and positive potentials. With this investigation, we report experimental results obtained with aluminum electrodes using this electrolyte. At low current densities lithium ion reduction and re-oxidation can be achieved on aluminum electrodes at potentials about 280 mV more positive than on lithium electrodes. In situ X-ray diffraction measurements collected during electrochemical lithium deposition on aluminum electrodes show that the shift to positive potentials is due to the negative Gibbs free energy change of the Li-Al alloy formation reaction.

Zhou, Y.N.; Yang, X.; Wang, X.J.; Lee, H.S.; Nam, K.W.; Haas, O.

2010-11-01T23:59:59.000Z

258

Electrochemical Investigation of Li-Al Anodes in Oligo (ethylene glycol) Dimethyl ether/LiPF6  

DOE Green Energy (OSTI)

LiPF{sub 6} dissolved in oligo(ethylene glycol) dimethyl ether with a molecular weight 5 g mol{sup -1} was investigated as a new electrolyte (OEGDME5, 1 M LiPF{sub 6}) for metal deposition and battery applications. At 25 C a conductivity of .48 x 1{sup -3} S cm{sup -1} was obtained and at 85 C, 3.78 x 1{sup -3} S cm{sup -1}. The apparent activation barrier for ionic transport was evaluated to be 3.7 kJ mol{sup -1}. OEGDME5, 1 M LiPF{sub 6} allows operating temperature above 1 C with very attractive conductivity. The electrolyte shows excellent performance at negative and positive potentials. With this investigation, we report experimental results obtained with aluminum electrodes using this electrolyte. At low current densities lithium ion reduction and re-oxidation can be achieved on aluminum electrodes at potentials about 28 mV more positive than on lithium electrodes. In situ X-ray diffraction measurements collected during electrochemical lithium deposition on aluminum electrodes show that the shift to positive potentials is due to the negative Gibbs free energy change of the Li-Al alloy formation reaction.

Y Zhou; X Wang; H Lee; K Nam; X Yang; O Haas

2011-12-31T23:59:59.000Z

259

Microstructural characterization and mechanical property of active soldering anodized 6061 Al alloy using Sn-3.5Ag-xTi active solders  

SciTech Connect

Active solders Sn-3.5Ag-xTi varied from x = 0 to 6 wt.% Ti addition were prepared by vacuum arc re-melting and the resultant phase formation and variation of microstructure with titanium concentration were analyzed using X-ray diffraction, optical microscopy and scanning electron microscopy. The Sn-3.5Ag-xTi active solders are used as metallic filler to join with anodized 6061 Al alloy for potential applications of providing a higher heat conduction path. Their joints and mechanical properties were characterized and evaluated in terms of titanium content. The mechanical property of joints was measured by shear testing. The joint strength was very dependent on the titanium content. Solder with a 0.5 wt.% Ti addition can successfully wet and bond to the anodized aluminum oxide layers of Al alloy and posses a shear strength of 16.28 {+-} 0.64 MPa. The maximum bonding strength reached 22.24 {+-} 0.70 MPa at a 3 wt.% Ti addition. Interfacial reaction phase and chemical composition were identified by a transmission electron microscope with energy dispersive spectrometer. Results showed that the Ti element reacts with anodized aluminum oxide to form Al{sub 3}Ti-rich and Al{sub 3}Ti phases at the joint interfaces. - Highlights: Black-Right-Pointing-Pointer Active solder joining of anodized Al alloy needs 0.5 wt.% Ti addition for Sn-3.5Ag. Black-Right-Pointing-Pointer The maximum bonding strength occurs at 3 wt.% Ti addition. Black-Right-Pointing-Pointer The Ti reacts with anodized Al oxide to form Al{sub 3}Ti-rich and Al{sub 3}Ti at joint interface.

Wang, Wei-Lin, E-mail: wangwl77@gmail.com; Tsai, Yi-Chia, E-mail: tij@itri.org.tw

2012-06-15T23:59:59.000Z

260

Solid-State 17O NMR Study of Benzoic Acid Adsorption On Metal Oxide Surfaces  

Science Conference Proceedings (OSTI)

Solid-state 17O NMR spectra of 17O-labeled benzoic and anisic acids are reported and benzoic acid is used to probe the surface of metal oxides. Complexes formed when benzoic acid is dry-mixed with mesoporous silica, and nonporous titania and alumina are characterized. Chemical reactions with silica are not observed. The nature of benzoic acid on silica is a function of the water content of the oxide. The acid disperses in the pores of the silica if the silica is in equilibrium with ambient laboratory humidity. The acid displays high mobility as evidenced by a liquid-like, Lorentzian resonance. Excess benzoic acid remains as the crystalline hydrogen-bonded dimer. Benzoic acid reacts with titania and alumina surfaces in equilibrium with laboratory air to form the corresponding titanium and aluminum benzoates. In both materials the oxygen of the 17O-labeled acid is bound to the metal, showing the reaction proceeds by bond formation between oxygen deficient metal sites and the oxygen of the carboxylic acid. 27Al MAS NMR confirms this mechanism for the reaction on alumina. Dry mixing of benzoic acid with alumina rapidly quenches pentacoordinate aluminum sites, excellent evidence that these sites are confined to the surface of the alumina particles.

Hagaman, Edward {Ed} W [ORNL; Chen, Banghao [ORNL; Jiao, Jian [ORNL; Parsons, Williams [Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

The Effect of Impurities on the Processing of Aluminum Alloys  

Science Conference Proceedings (OSTI)

For this Aluminum Industry of the Future (IOF) project, the effect of impurities on the processing of aluminum alloys was systematically investigated. The work was carried out as a collaborative effort between the Pennsylvania State University and Oak Ridge National Laboratory. Industrial support was provided by ALCOA and ThermoCalc, Inc. The achievements described below were made. A method that combines first-principles calculation and calculation of phase diagrams (CALPHAD) was used to develop the multicomponent database Al-Ca-K-Li-Mg-Na. This method was extensively used in this project for the development of a thermodynamic database. The first-principles approach provided some thermodynamic property data that are not available in the open literature. These calculated results were used in the thermodynamic modeling as experimental data. Some of the thermodynamic property data are difficult, if not impossible, to measure. The method developed and used in this project allows the estimation of these data for thermodynamic database development. The multicomponent database Al-Ca-K-Li-Mg-Na was developed. Elements such as Ca, Li, Na, and K are impurities that strongly affect the formability and corrosion behavior of aluminum alloys. However, these impurity elements are not included in the commercial aluminum alloy database. The process of thermodynamic modeling began from Al-Na, Ca-Li, Li-Na, K-Na, and Li-K sub-binary systems. Then ternary and higher systems were extrapolated because of the lack of experimental information. Databases for five binary alloy systems and two ternary systems were developed. Along with other existing binary and ternary databases, the full database of the multicomponent Al-Ca-K-Li-Mg-Na system was completed in this project. The methodology in integrating with commercial or other aluminum alloy databases can be developed. The mechanism of sodium-induced high-temperature embrittlement (HTE) of Al-Mg is now understood. Using the thermodynamic database developed in this project, thermodynamic simulations were carried out to investigate the effect of sodium on the HTE of Al-Mg alloys. The simulation results indicated that the liquid miscibility gap resulting from the dissolved sodium in the molten material plays an important role in HTE. A liquid phase forms from the solid face-centered cubic (fcc) phase (most likely at grain boundaries) during cooling, resulting in the occurrence of HTE. Comparison of the thermodynamic simulation results with experimental measurements on the high-temperature ductility of an Al-5Mg-Na alloy shows that HTE occurs in the temperature range at which the liquid phase exists. Based on this fundamental understanding of the HTE mechanism during processing of aluminum alloy, an HTE sensitive zone and a hot-rolling safe zone of the Al-Mg-Na alloys are defined as functions of processing temperature and alloy composition. The tendency of HTE was evaluated based on thermodynamic simulations of the fraction of the intergranular sodium-rich liquid phase. Methods of avoiding HTE during rolling/extrusion of Al-Mg-based alloys were suggested. Energy and environmental benefits from the results of this project could occur through a number of avenues: (1) energy benefits accruing from reduced rejection rates of the aluminum sheet and bar, (2) reduced dross formation during the remelting of the aluminum rejects, and (3) reduced CO2 emission related to the energy savings. The sheet and extruded bar quantities produced in the United States during 2000 were 10,822 and 4,546 million pounds, respectively. It is assumed that 50% of the sheet and 10% of the bar will be affected by implementing the results of this project. With the current process, the rejection rate of sheet and bar is estimated at 5%. Assuming that at least half of the 5% rejection of sheet and bar will be eliminated by using the results of this project and that 4% of the aluminum will be lost through dross (Al2O3) during remelting of the rejects, the full-scale industrial implementation of the project results would lead to energy

Zi-Kui Liu; Shengjun Zhang; Qingyou Han; Vinod Sikka

2007-04-23T23:59:59.000Z

262

Silicon Solar Cells with Front Hetero-Contact and Aluminum Alloy Back Junction: Preprint  

DOE Green Energy (OSTI)

We prototype an alternative n-type monocrystalline silicon (c-Si) solar cell structure that utilizes an n/i-type hydrogenated amorphous silicon (a-Si:H) front hetero-contact and a back p-n junction formed by alloying aluminum (Al) with the n-type Si wafer.

Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

2008-05-01T23:59:59.000Z

263

Heat transfer at the mold-metal interface in permanent mold casting of aluminum alloys project. Annual project status report for the period October 1, 1997 to September 30, 1998  

Science Conference Proceedings (OSTI)

In the first year of this three-year project, substantial progress has been achieved. This project on heat transfer coefficients in metal permanent mold casting is being conducted in three areas. They are the theoretical study at the University of Michigan, the experimental investigations of squeeze casting and semi-solid casting at CMI-Tech Center, and the experimental investigation of low pressure permanent mold casting at Amcast Automotive. U-M did an initial geometry which was defined for ProCAST to solve, and then a geometry half the size was defined and solved using the same boundary conditions. A conceptual mold geometry was examined and is represented as an axisymmetric element.Furthermore, the influences of the localized heat transfer coefficients on the casting process were carefully studied. The HTC Evaluator has been proposed and initially developed by the U-M team. The Reference and the Database Modules of the HTC Evaluator have been developed, and extensively tested. A series of technical barriers have been cited and potential solutions have been surveyed. At the CMI-Tech Center, the Kistler direct cavity pressure measurement system has been purchased and tested. The calibrations has been evaluated. The probe is capable of sensing a light finger pressure. The experimental mold has been designed and modified. The experimental mold has been designed and modified. The first experiment is scheduled for October 14, 1998. The geometry of the experimental hockey-puck casting has been given to the U-M team for numerical analysis.

Pehlke, R.D.; Hao, S.W.

1998-09-30T23:59:59.000Z

264

Analysis of surface contaminants on beryllium and aluminum windows  

Science Conference Proceedings (OSTI)

An effort has been made to document the types of contamination which form on beryllium window surfaces due to interaction with a synchrotron radiation beam. Beryllium windows contaminated in a variety of ways (exposure to water and air) exhibited surface powders, gels, crystals and liquid droplets. These contaminants were analyzed by electron diffraction, electron energy loss spectroscopy, energy dispersive x-ray spectroscopy and wet chemical methods. Materials found on window surfaces include beryllium oxide, amorphous carbon, cuprous oxide, metallic copper and nitric acid. Aluminum window surface contaminants were also examined.

Gmur, N.F.

1987-06-01T23:59:59.000Z

265

Mercury-Free Dissolution of Aluminum-Based Nuclear Material: From Basic Science to the Plant  

Science Conference Proceedings (OSTI)

Conditions were optimized for the first plant-scale dissolution of an aluminum-containing nuclear material without using mercury as a catalyst. This nuclear material was a homogeneous mixture of plutonium oxide and aluminum metal that had been compounded for use as the core matrix in Mark 42 nuclear fuel. Because this material had later failed plutonium distribution specifications, it was rejected for use in the fabrication of Mark 42 fuel tubes, and was stored at the Savannah River Site (SRS) awaiting disposition. This powder-like material was composed of a mixture of approximately 80 percent aluminum and 11 percent plutonium. Historically, aluminum-clad spent nuclear fuels [13] have been dissolved using a mercuric nitrate catalyst in a nitric acid (HNO3) solution to facilitate the dissolution of the bulk aluminum cladding. Developmental work at SRS indicated that the plutonium oxide/aluminum compounded matrix could be dissolved without mercury. Various mercury-free conditions were studied to evaluate the rate of dissolution of the Mark 42 compact material and to assess the corrosion rate to the stainless steel dissolver. The elimination of mercury from the dissolution process fit with waste minimization and industrial hygiene goals to reduce the use of mercury in the United States. The mercury-free dissolution technology was optimized for Mark 42 compact material in laboratory-scale tests, and successfully implemented at the plant.

Crooks, W.J. III

2003-05-14T23:59:59.000Z

266

(Polyfluoroaryl) fluoroanions of aluminum, gallium, and indium of enhanced utility, uses thereof, and products based thereon  

DOE Patents (OSTI)

The (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are novel weakly coordinating anions which are highly fluorinated. (Polyfluoroaryl)fluoroanions of one such type contain at least one ring substituent other than fluorine. These (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium have greater solubility in organic solvents, or have a coordinative ability essentially equal to or less than that of the corresponding (polyfluoroaryl)fluoroanion of aluminum, gallium, or indium in which the substituent is replaced by fluorine. Another type of new (polyfluoroaryl)fluoroanion of aluminum, gallium, and indium have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups. When used as a cocatalyst in the formation of novel catalytic complexes with d- or f-block metal compounds having at least one leaving group such as a methyl group, these anions, because of their weak coordination to the metal center, do not interfere in the ethylene polymerization process, while affecting the propylene process favorably, if highly isotactic polypropylene is desired. Thus, the (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium of this invention are useful in various polymerization processes such as are described.

Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

2001-01-01T23:59:59.000Z

267

(Polyfluoroaryl) fluoroanions of aluminum, gallium, and indium of enhanced utility, uses thereof, and products based thereon  

DOE Patents (OSTI)

The (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are novel weakly coordinating anions which are highly fluorinated. (Polyfluoroaryl)fluoroanions of one such type contain at least one ring substituent other than fluorine. These (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium have greater solubility in organic solvents, or have a coordinative ability essentially equal to or less than that of the corresponding (polyfluoroaryl)fluoroanion of aluminum, gallium, or indium in which the substituent is replaced by fluorine. Another type of new (polyfluoroaryl)fluoroanion of aluminum, gallium, and indium have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups. When used as a cocatalyst in the formation of novel catalytic complexes with d- or f-block metal compounds having at least one leaving group such as a methyl group, these anions, because of their weak coordination to the metal center, do not interfere in the ethylene polymerization process, while affecting the propylene process favorably, if highly isotactic polypropylene is desired. Thus, the (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium of this invention are useful in various polymerization processes such as are described.

Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

2002-01-01T23:59:59.000Z

268

ALS@20  

NLE Websites -- All DOE Office Websites (Extended Search)

feed-image feed-image Digg: ALSBerkeleyLab Facebook Page: 208064938929 Flickr: advancedlightsource Twitter: ALSBerkeleyLab YouTube: AdvancedLightSource Home About the ALS ALS@20 ALS@20 ALS@20 Kick-Off Celebration Print On Friday, January 11, the Advanced Light Source celebrated the beginning of its 20th anniversary year with a brunch attended by more than 150 current and past staff members. After introductory remarks describing the trials and tribulations encountered during the construction of the ALS from former Director Jay Marx, current ALS Scientific Director Steve Kevan and Director Roger Falcone talked about the progress of the facility over the years. Attendees were then able to view more than 500 historical photos of the ALS and its staff displayed around the room.

269

Metallography of pitted aluminum-clad, depleted uranium fuel  

Science Conference Proceedings (OSTI)

The storage of aluminum-clad fuel and target materials in the L-Disassembly Basin at the Savannah River Site for more than 5 years has resulted in extensive pitting corrosion of these materials. In many cases the pitting corrosion of the aluminum clad has penetrated in the uranium metal core, resulting in the release of plutonium, uranium, cesium-137, and other fission product activity to the basin water. In an effort to characterize the extent of corrosion of the Mark 31A target slugs, two unirradiated slug assemblies were removed from basin storage and sent to the Savannah River Technology Center for evaluation. This paper presents the results of the metallography and photographic documentation of this evaluation. The metallography confirmed that pitting depths varied, with the deepest pit found to be about 0.12 inches (3.05 nun). Less than 2% of the aluminum cladding was found to be breached resulting in less than 5% of the uranium surface area being affected by corrosion. The overall integrity of the target slug remained intact.

Nelson, D.Z.; Howell, J.P.

1994-12-01T23:59:59.000Z

270

EFFECT OF CATIONS ON ALUMINUM SPECIATION UNDER ALKALINE CONDITIONS  

SciTech Connect

A series of experiments were performed to examine the effect of metal cations common to high level waste on the phase of aluminum formed. Experiments were performed at temperature of 150 C, 75 C, and room temperature, either without additional metal cation, or with 0.01-0.2 molar equivalents of either Ni{sup 2+}, Fe{sup 3+}, Mn{sup 2+}, or Cr{sup 3+}. Results showed that temperature has the greatest effect on the phase obtained. At 150 C, boehmite is the only phase obtained, independent of the presence of other metal cations, with only one exception where a small amount of gibbsite was also detected in the product when 0.2 equivalents of Ni{sup 2+} was present. At 75 C, a mixture of phases is obtained, most commonly including bayerite and gibbsite; however, boehmite is also formed under some conditions, including in the absence of additional metal ion. At room temperature, in the absence of additional metal ion, a mixture of bayerite and gibbsite is obtained. The addition of another metal cation suppresses the formation of gibbsite, with a couple of exceptions (0.2 equivalents of Ni{sup 2+} or 0.01 equivalents of Cr{sup 3+}) where both phases are still obtained.

Taylor-Pashow, K.; Hobbs, D.

2012-07-31T23:59:59.000Z

271

Aluminum nanocomposites having wear resistance better than stainless steel  

Science Conference Proceedings (OSTI)

Tribological behavior of alumina-particle-reinforced aluminum composites made by powder metallurgy process has been investigated. The nanocomposite containing 15 vol% of Al2O3 nanoparticles exhibits excellent wear resistance by showing significantly low wear rate and abrasive wear mode. The wear rate of the nanocomposite is even lower than stainless steel. We have also demonstrated that such excellent wear resistance only occurred in the composite reinforced with the high volume fraction of nanosized reinforcing particles. The results were discussed in terms of the microstructure of the nanocomposite.

An, Linan [University of Central Florida; Qu, Jun [ORNL; Luo, Jinsong [Chinese Academy of Sciences; Fan, Yi [Chinese Academy of Sciences; Zhang, Ligong [University of Central Florida; Liu, Jinling [University of Central Florida; Xu, Chengying [University of Central Florida; Blau, Peter Julian [ORNL

2011-01-01T23:59:59.000Z

272

Thermal Expansion of Aluminum and Some Aluminum Alloys  

Science Conference Proceedings (OSTI)

... Am. Inst. Mining Met. Engrs., Inst. Metals Diy. 104, 308 (1933). 13] P. Hidnert and W. Souder, Thermal expansion of solids, NBS Circular 486 (1950). ...

2006-03-29T23:59:59.000Z

273

Characterizing Hydrogen Storage Media: Understanding the Interior Pore Structure of a Cu3BTC2 Metal-Organic Framework Infiltrated with NaAlH4  

DOE Green Energy (OSTI)

Preliminary results support the nano-confinement of sodium alanate within the pores of a Cu{sub 3}BTC{sub 2} MOF substrate. Increased {sup 1}H and {sup 27}Al NMR T{sub 1} relaxation rates indicate a close proximity of infiltrated sodium alante to the paramagnetic Cu{sup 2+} ions on the BTC paddlewheel units. This is in support of the theory that an interaction due to the electronegative framework with the sodium alanate facilitates thermodynamically-favorable hydrogen adsorption and desorption. Further studies can elucidate the local electronic environment of the sodium ions, further supporting a charge-transfer mechanism as the driving force for thermodynamically-favorable hydrogen adsorption and desorption.

Kirmiz, A; Bhakta, R K; Allendorf, M D; Majzoub, E H; Behrens, R; Herberg, J

2010-04-15T23:59:59.000Z

274

Aluminum: Technology, Applications and Environment - TMS  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... This volume is the 6th edition of Dr. Dietrich Altenpohl's book, originally titled Aluminum From Within (and still carrying that subtitle.) It is the ...

275

Aluminum Scrap Supply and Environmental Impact Model  

Science Conference Proceedings (OSTI)

Aug 1, 2000 ... It has been applied to the USA to forecast sources of aluminum scrap ... good balance between supply and demand on average over the years.

276

Aluminum and Energy--an International Perspective  

Science Conference Proceedings (OSTI)

A review of the effects of regional energy and trade issues on the global aluminium industry and its ... “Energy Policy Position of the Aluminum Association

277

Materials Sustainability: Digital Resource Center - Aluminum: The ...  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... A complete review of today's successful automotive aluminum recycling infrastructure. Shows a car's journey through the entire recycling ...

278

Materials Sustainability: Digital Resource Center - Aluminum ...  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... This volume is the 6th edition of Dr. Dietrich Altenpohl's book, originally titled Aluminum From Within (and still carrying that subtitle.) It is the ...

279

Aluminum-stabilized NB3SN superconductor  

DOE Patents (OSTI)

An aluminum-stabilized Nb.sub.3 Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor is heated to convert it to the brittle Nb.sub.3 Sn superconductor phase, using a temperature high enough to perform the transformation but still below the melting point of the aluminum. This results in reaction of substantially all of the niobium, while providing stabilization and react-in-place features which are beneficial in the fabrication of magnets utilizing superconducting materials.

Scanlan, Ronald M. (Livermore, CA)

1988-01-01T23:59:59.000Z

280

Aluminum—Meeting the Challengesof Climate Change  

Science Conference Proceedings (OSTI)

However, the largest potential for emission reduction is through the use of aluminum products in energy-saving applications, such as lightweight vehicles, green ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Activated Aluminum Hydride Hydrogen Storage Compositions ...  

Aluminum hydride is the best known alane and has been known for over 60 years. It is potentially a very attractive medium for onboard automotive hydrogen storage ...

282

Primary Aluminum Processing in Quebec and Canada  

Science Conference Proceedings (OSTI)

3D Meso-scale Modelling of Aluminum-alloy Welding Processes for Prediction of ... Frequency Modulation Effect on the Solidification of Alloy 718 Fusion Zone.

283

Climate VISION: Private Sector Initiatives: Aluminum: Resources...  

Office of Scientific and Technical Information (OSTI)

Associations FederalState Programs Technical Information Plant Assessments Training Calendar Software Tools Energy Management Expertise Auto Aluminum Usage Benefits Environment...

284

Energy Opportunities in the Aluminum Processing Industry  

Science Conference Proceedings (OSTI)

As carbon management has grown in importance and project payback becomes ... overall energy within a plant and within the aluminum processing industry.

285

Distinguishing Dynamic Recrystallization (DRX) in Aluminum and ...  

Science Conference Proceedings (OSTI)

... Damage Tolerant Critical Aircraft Structures – an Aluminum Supplier Perspective .... P44 - X-ray Diffraction Study on Lattice Constant of Supersaturated Solid ...

286

Cast Aluminum Housings in Electrical Fires  

Science Conference Proceedings (OSTI)

Abstract Scope, Cast aluminum and its alloys are often used as enclosures for electrical appliances and similar devices. Electrical faults can often be analyzed ...

287

2013 TMS Industrial Aluminum Electrolysis Course - Tour  

Science Conference Proceedings (OSTI)

Qatalum is an equal joint venture between Qatar Petroleum and Hydro Aluminum of Norway and produces 585,000 tons of high-quality primary aluminium ...

288

Aluminum: Technology, Applications, and Environment (Sample ...  

Science Conference Proceedings (OSTI)

Because hydroelectric power is a relatively inexpensive and clean source of energy, aluminum smelters are mostly built in countries with readily avail-.

289

HETEROGENEOUS DISTRIBUTION OF {sup 26}Al AT THE BIRTH OF THE SOLAR SYSTEM  

SciTech Connect

It is believed that {sup 26}Al, a short-lived (t{sub 1/2} = 0.73 Ma) and now extinct radionuclide, was uniformly distributed in the nascent solar system (SS) with the initial {sup 26}Al/{sup 27}Al ratio of {approx}5.2 x 10{sup -5}, suggesting an external, stellar origin rather than local, solar source. However, the stellar source of {sup 26}Al and the manner in which it was injected into the SS remain controversial: the {sup 26}Al could have been produced by an asymptotic giant branch star, a supernova, or a Wolf-Rayet star and injected either into the protosolar molecular cloud, protosolar cloud core, or protoplanetary disk. Corundum (Al{sub 2}O{sub 3}) is predicted to be the first condensate from a cooling gas of solar composition. Here we show that micron-sized corundum condensates from {sup 16}O-rich ({Delta}{sup 17}O {approx} -25 per mille ) gas of solar composition recorded heterogeneous distribution of {sup 26}Al at the birth of the SS: the inferred initial {sup 26}Al/{sup 27}Al ratio ranges from {approx}6.5x10{sup -5} to <2x10{sup -6}; 52% of corundum grains measured are {sup 26}Al-poor. Abundant {sup 26}Al-poor, {sup 16}O-rich refractory objects include grossite- and hibonite-rich calcium-aluminum-rich inclusions (CAIs) in CH (high metal abundance and high iron concentration) chondrites, platy hibonite crystals in CM (Mighei-like) chondrites, and CAIs with fractionation and unidentified nuclear effects CAIs chondrites. Considering the apparently early and short duration (<0.3 Ma) of condensation of refractory {sup 16}O-rich solids in the SS, we infer that {sup 26}Al was injected into the collapsing protosolar molecular cloud and later homogenized in the protoplanetary disk. The apparent lack of correlation between {sup 26}Al abundance and O-isotope composition of corundum grains constrains the stellar source of {sup 26}Al in the SS.

Makide, Kentaro; Nagashima, Kazuhide; Krot, Alexander N.; Huss, Gary R. [Hawai'i Institute of Geophysics and Planetology, School of Ocean, Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 96822 (United States); Ciesla, Fred J.; Yang, Le [Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637 (United States); Hellebrand, Eric; Gaidos, Eric, E-mail: sasha@higp.hawaii.edu [Department of Geology and Geophysics, University of Hawai'i at Manoa, Honolulu, HI 96822 (United States)

2011-06-01T23:59:59.000Z

290

Industry @ ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Industry @ ALS Industry @ ALS Industry @ ALS Concrete Industry Benefits from Ancient Romans and the ALS Print Thursday, 17 October 2013 14:24 New insights into the Romans' ingenious concrete harbor structures emerging from ALS beamline research could move the modern concrete industry toward its goal of a reduced carbon footprint. Summary Slide Read more... Moving Industry Forward: Finding the Environmental Opportunity in Biochar Print Thursday, 12 September 2013 08:41 Using ALS Beamlines 10.3.2 and 8.3.2, the Environmental Protection Agency (EPA) is currently investigating how biochar sorbs environmental toxins and which kinds of biochar are the most effective. The possibilities for widespread use have already launched entrepreneurial commercial ventures. Summary Slide

291

Atomistic modeling of ultra-thin surface oxide growth on a ternary alloy : oxidation of Al-Ni-Fe.  

Science Conference Proceedings (OSTI)

By employing variable-charge molecular dynamics, surface oxide film growth on aluminum-nickel-iron alloys has been studied at 300 and 600 K. The dynamics of oxidation and oxide growth is strongly dependent on the composition of the initial alloy and the ambient temperature. Higher content of Ni and Fe in Al alloys is found to reduce the oxide growth kinetics; 15% Ni + 15% Fe Al alloy yielded 30-40% less growth at 400 ps oxygen exposure compared to pure Al. We observe dopant segregation, which disrupts the interaction between O atoms and Al atoms in the alloy, leading to a nonlinear oxide growth profile in the case of ternary Al-Ni-Fe alloy. Compared to oxidation at 300 K, 30% more oxide layer was yielded at 600 K, due to the elevated temperature. The simulated oxide kinetics indicates that the growth rate of anion surpasses the cation rate with higher sensitivity to the stoichiometry of the base metal substrate. Charge state analysis provides insights into the evolution of cation and anion species as the oxide layer grows. In particular, due to higher correlation, Fe shows a high rate of oxidation when the content is high, whereas the rate of Ni oxidation is consistently low. Density profile analysis suggests the segregation of dopant atoms below the growing ultrathin oxide layer, showing the presence of a layer-by-layer mode of oxide layer even with disordered structure. Coordination number (Z, the number of oxygen atoms around an aluminum atom) of aluminum oxide has been used to identify how the initial oxidation transitions into equilibrated states. Z = 3 is dominant in the early stages of oxidation and at the interface between oxide and bulk substrate, but it transitions quickly to Z = 4 (45%) and 5 (35%) as the oxide equilibrates and approaches its self-limiting thickness. Even though growth kinetics is dependent on the base metal stoichiometry, the composition of the oxide microstructure is not significantly affected, primarily segregating dopant elements, i.e., Ni and Fe outside of the oxide layer.

Byoungseon, J.; Sankaranarayanan, S. K. R. S.; Ramanathan, S. (Center for Nanoscale Materials); (Harvard Univ.)

2011-04-14T23:59:59.000Z

292

Friction Stir Processing of Ti-6Al-4V for Grain Size Reduction in ...  

Science Conference Proceedings (OSTI)

In Ti alloys, such as Ti-6Al-4V, fusion welding results in coarse-grained microstructure ... Friction Stir Spot Welding of Magnesium to Aluminum Alloys with a Cold ...

293

ALS Visitors  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy. March 2010 ALS Project Manager Steve Rossi hosted a group of visitors from Kazakhstan on Friday, March 5. The visitors, including a representative from the Kazakhstan...

294

Aluminum Rolling - Programmaster.org  

Science Conference Proceedings (OSTI)

Organizer(s), Kai F. Karhausen, Hydro Aluminium Rolled Products GmbH. Scope, This symposium is part of the Light Metals Symposium and covers all ...

295

Advanced manufacturing by spray forming: Aluminum strip and microelectromechanical systems  

SciTech Connect

Spray forming is an advanced materials processing technology that converts a bulk liquid metal to a near-net-shape solid by depositing atomized droplets onto a suitably shaped substrate. By combining rapid solidification processing with product shape control, spray forming can reduce manufacturing costs while improving product quality. INEL is developing a unique spray-forming method based on de Laval (converging/diverging) nozzle designs to produce near-net-shape solids and coatings of metals, polymers, and composite materials. Properties of the spray-formed material are tailored by controlling the characteristics of the spray plume and substrate. Two examples are described: high-volume production of aluminum alloy strip, and the replication of micron-scale features in micropatterned polymers during the production of microelectromechanical systems.

McHugh, K.M.

1994-12-31T23:59:59.000Z

296

Reduction of Perchlorate and Nitrate by Aluminum Activated by pH Change and Electrochemically Induced Pitting Corrosion.  

E-Print Network (OSTI)

Highly oxidized species like perchlorate and nitrate that are released into the environment by anthropogenic activities are a source of concern as they have been known to contaminate groundwater. These species are extremely soluble in water and can migrate through aquifer systems, travelling substantial distances from the original site of contamination. Due to their high solubility, these oxy-anions cannot be treated using conventional treatment processes like filtration and sedimentation. Several treatment technologies are currently available to abate the human health risk due to exposure to perchlorate and nitrate. However, most of the existing treatment processes are expensive or have limitations, like generation of brines with high concentrations of perchlorate or nitrate. Aluminum can effectively reduce perchlorate and nitrate, if the protective oxide film that separates the thermodynamically reactive Al0 from most environments is removed. Aluminum was activated by pH change and electrochemically induced, pitting corrosion to remove the passivating oxide layer and expose the underlying, thermodynamically reactive, zero-valent aluminum. A partially oxidized species of aluminum, like monovalent aluminum, is believed to bring about the reduction of perchlorate and nitrate. This research studied the reduction of perchlorate and nitrate by aluminum that was activated by these two mechanisms. Results indicated that aluminum activated by pH change resulted in an instantaneous decrease in perchlorate concentration without any increase in chlorate or chloride concentrations, which suggests that the perchlorate might be adsorbed on the aluminum oxide surface. However, aluminum activated by electrochemically induced pitting corrosion can effectively reduce perchlorate to chlorate. Nitrate, on the other hand, was reduced completely to ammonia by both treatment mechanisms. The studies conducted in this dissertation suggest that aluminum can be effectively used as a reducing agent to develop a treatment process to reduce perchlorate and nitrate.

Raut Desai, Aditya B.

2010-05-01T23:59:59.000Z

297

Energy Policy Position of the Aluminum Association - TMS  

Science Conference Proceedings (OSTI)

Energy represents about one third of the total production cost of primary aluminum. Electricity is an essential ingredient in primary aluminum production.

298

Determination of Aluminum Rolling Oil and Machinery Oil Residues ...  

Science Conference Proceedings (OSTI)

Presentation Title, Determination of Aluminum Rolling Oil and Machinery Oil Residues on Aluminum Sheet and Foil by Using Elemental Analysis and Fourier  ...

299

High Temperature Creep Characterization of A380 Cast Aluminum ...  

Science Conference Proceedings (OSTI)

High Strength Aluminum Brazing Sheets for Condenser Fins of Automotive Heat ... for the Phase Formation in a Wide Range of Commercial Aluminum Alloys.

300

Nano Assisted Low Temperature Diffusion Brazing of Aluminum ...  

Science Conference Proceedings (OSTI)

Aluminum alloys are ideal for many heat exchanger applications. However, joining of aluminum alloys is challenging due to tenacious native oxides on the base ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

ALS Visitors  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Visitors ALS Visitors ALS Visitors Print Wednesday, 29 July 2009 00:00 ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

302

High pressure synthesis and crystal structure of a ternary superconductor Ca{sub 2}Al{sub 3}Si{sub 4} containing layer structured calcium sub-network isomorphous with black phosphorus  

SciTech Connect

The Zintl compound CaAl{sub 2}Si{sub 2} is peritectically decomposed to a mixture of Ca{sub 2}Al{sub 3}Si{sub 4} and aluminum metal at temperatures above 600 Degree-Sign C under a pressure of 5 GPa. The new ternary compound Ca{sub 2}Al{sub 3}Sl{sub 4} crystalizes with the space group Cmc2{sub 1} and the lattice parameters a=5.8846(8), b=14.973(1), and c=7.7966(5) A. The structure is composed of aluminum silicide framework [Al{sub 3}Si{sub 4}] and layer structured [Ca{sub 2}] network interpenetrating with each other. The electron probe microanalysis (EPMA) shows the formation of solid solutions Ca{sub 2}Al{sub 3-x}Si{sub 4+x} (x<0.6). The layer structured [Ca{sub 2}] sub-network is isomorphous with black phosphorus. The new ternary compound shows superconductivity with a transition temperature (T{sub c}) of 6.4 K. The band structure calculation suggests that the superconductivity should occur through the conduction bands mainly composed of 3p orbitals of the aluminum silicide framework. - Graphical abstract: A new ternary superconductor Ca{sub 2}Al{sub 3}Si{sub 4} has been prepared under high pressure and high temperature conditions, which includes layer structured calcium sub-network isomorphous with black phosphorus. Highlights: Black-Right-Pointing-Pointer A typical Zintl compound CaAl{sub 2}Si{sub 2} melts congruently at ambient pressure. Black-Right-Pointing-Pointer Under high pressure CaAl{sub 2}Si{sub 2} decomposes to Ca{sub 2}Al{sub 3}Si{sub 4} and Al at {approx}600 Degree-Sign C. Black-Right-Pointing-Pointer Ca{sub 2}Al{sub 3}Si{sub 4} contains Ca sub-network isomorphous with black phosphorus. Black-Right-Pointing-Pointer Ca{sub 2}Al{sub 3}Si{sub 4} shows superconductivity with a transition temperature of 6.4 K.

Tanaka, Masashi; Zhang, Shuai; Tanaka, Yuki; Inumaru, Kei [Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527 (Japan)] [Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527 (Japan); Yamanaka, Shoji, E-mail: syamana@hiroshima-u.ac.jp [Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527 (Japan)] [Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527 (Japan)

2013-02-15T23:59:59.000Z

303

Aluminum  

Science Conference Proceedings (OSTI)

Add to Cart, Image, Click on Title to view details, Member (Student) Price, Non- member Price. Available at wiley.com, Advanced Materials for Energy Conversion ...

304

Cost and energy consumption estimates for the aluminum-air battery anode fuel cycle  

DOE Green Energy (OSTI)

At the request of DOE's Office of Energy Storage and Distribution (OESD), Pacific Northwest Laboratory (PNL) conducted a study to generate estimates of the energy use and costs associated with the aluminum anode fuel cycle of the aluminum-air (Al-air) battery. The results of this analysis indicate that the cost and energy consumption characteristics of the mechanically rechargeable Al-air battery system are not as attractive as some other electrically rechargeable electric vehicle battery systems being developed by OESD. However, there are distinct advantages to mechanically rechargeable batteries, which may make the Al-air battery (or other mechanically rechargeable batteries) attractive for other uses, such as stand-alone applications. Fuel cells, such as the proton exchange membrane (PEM), and advanced secondary batteries may be better suited to electric vehicle applications. 26 refs., 3 figs., 25 tabs.

Humphreys, K.K.; Brown, D.R.

1990-01-01T23:59:59.000Z

305

Method of manufacturing a niobium-aluminum-germanium superconductive material  

DOE Patents (OSTI)

A method for manufacturing flexible Nb.sub.3 (Al,Ge) multifilamentary superconductive material in which a sintered porous niobium compact is infiltrated with an aluminum-germanium alloy and thereafter deformed and heat treated in a series of steps at different successively higher temperatures preferably below 1000.degree. C. to produce filaments composed of Nb.sub.3 (Al,G3) within the compact. By avoiding temperatures in excess of 1000.degree. C. during the heat treatment, cladding material such as copper can be applied to facilitate a deformation step preceding the heat treatment and can remain in place through the heat treatment to also serve as a temperature stabilizer for supeconductive material produced. Further, these lower heat treatment temperatures favor formation of filaments with reduced grain size and, hence with more grain boundaries which in turn increase the current-carrying capacity of the superconductive material.

Wang, John L. (San Francisco, CA); Pickus, Milton R. (Oakland, CA); Douglas, Kent E. (Redondo Beach, CA)

1980-01-01T23:59:59.000Z

306

Characterization of Non Ferrous Metals - Programmaster.org  

Science Conference Proceedings (OSTI)

... in the search for improved metallic alloys for various plasmonic applications. ... Al to monovalent noble metal Ag on the shifting of the interband transitions to ...

307

Climate VISION: Private Sector Initiatives: Aluminum  

Office of Scientific and Technical Information (OSTI)

Letters of Intent/Agreements Letters of Intent/Agreements Aluminum Association Logo The Aluminum Association and its members participating in the Voluntary Aluminum Industry Partnership (VAIP), representing 98% of primary aluminum production in the United States, have committed under the Climate VISION program to a direct carbon intensity reduction of emissions of perfluorocarbons (PFCs) and of emissions of CO2 from the consumption of the carbon anode from the primary aluminum reduction process. The Climate VISION target is a 53% total carbon equivalent reduction from these sources by 2010 from 1990 levels. The industry has been working to reduce greenhouse gas emissions for over a decade and this new commitment equates to an additional direct carbon-intensity reduction of 65% since 2000. As a

308

The effect of chromium on the weldability and microstructure of Fe-Cr-Al weld cladding  

Science Conference Proceedings (OSTI)

Iron-aluminum-based weld cladding is currently being considered as corrosion-resistant coatings for boiler tubes in coal-fired power plants. Although these alloys could potentially be good coating candidates due to their excellent high-temperature corrosion resistance, Fe-Al weld cladding is susceptible to cracking due to hydrogen embrittlement at elevated aluminum concentrations. Additions of chromium to these iron-aluminum alloys have been shown to improve the corrosion resistance of the alloys and could potentially increase the lifetimes of the coatings. The current study investigated the effect of chromium on the hydrogen cracking susceptibility of Fe-Al weld cladding.

Regina, J.R.; Dupont, J.N.; Marder, A.R. [ExxonMobil, Houston, TX (United States). Welding & Fabrication

2007-06-15T23:59:59.000Z

309

LEVELING METAL COATINGS  

DOE Patents (OSTI)

A method is described for applying metallic coatings to a cylinder of uranium. An aluminum-silicon coat is applied by a process consisting of first cleaning the article by immersion for 5 minutes in 50% nitric acid at 65 C. The article then is dipped through a flux, prepared by adding 10% sodium fluoride to 90% of a flux comprising 53% potassium chloride, 42% lithium chloride, and 5% sodium chloride at 560 for 2 minutes and then directly into a molten metal bath comprising 99% aluminun and 12% silicon at 620 C for 3 minutes. While the coating is yet molten the article is transferred to a pair of steel rollers and rolled until the coating solidifies. By varying the composition of the flux other metals such as zinc, lead or the like may be coated on uranium in a similar manner.

Gage, H.A.

1959-02-10T23:59:59.000Z

310

A novel aqueous dual-channel aluminum-hydrogen peroxide battery  

SciTech Connect

A dual-channel aluminum hydrogen peroxide battery is introduced with an open-circuit voltage of 1.9 volts, polarized losses of 0.9 mV cm[sup 2]/mA, and power densities of 1 W/cm[sup 2]. Catholyte and anolyte cell compartments are separated by an Ir/Pd modified porous nickel cathode. Separation of catholyte and anolyte chambers prevents hydrogen peroxide poisoning of the aluminum anode. The battery is expressed by aluminum oxidation and aqueous solution phase hydrogen peroxide reduction for an overall battery discharge consisting of 2Al + 3H[sub 2]O[sub 2] + 2 OH[sup [minus

Marsh, C. (Naval Undersea Warfare Center, Newport, RI (United States). Electric Propulsion); Licht, S. (Clark Univ., Worcester, MA (United States). Dept. of Chemistry)

1994-06-01T23:59:59.000Z

311

ALS Visitors  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Visitors Print ALS Visitors Print ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

312

Al Weinrub  

NLE Websites -- All DOE Office Websites (Extended Search)

Al Weinrub Al Weinrub Author, "COMMUNITY POWER: Decentralized Renewable Energy in California" Member, Sierra Club California Clean Energy-Climate CommitteeMember, Steering Committee, Bay Area Clean Energy Alliance al.weinrub@comcast.net This speaker was a visiting speaker who delivered a talk or talks on the date(s) shown at the links below. This speaker is not otherwise associated with Lawrence Berkeley National Laboratory, unless specifically identified as a Berkeley Lab staff member. Al Weinrub is a member of the Sierra Club California Energy-Climate Committee and serves on the Steering Committee of the Bay Area's Local Clean Energy Alliance. He is the author of COMMUNITY POWER: Decentralized Renewable Energy in California (http://www.localcleanenergy.org/Community-Power-Publication)

313

Al Gallo  

Energy.gov (U.S. Department of Energy (DOE))

As the Director for the Office of Technology Evaluation, Al Gallo works closely with the Chief Technology Officer as well as many Program Offices to advance the introduction and adoption of...

314

Reduction in interface state density of Al{sub 2}O{sub 3}/InGaAs metal-oxide-semiconductor interfaces by InGaAs surface nitridation  

Science Conference Proceedings (OSTI)

We report the decrease in interface trap density (D{sub it}) in Al{sub 2}O{sub 3}/InGaAs metal-oxide-semiconductor (MOS) capacitors by using electron cyclotron resonance plasma nitridation of the InGaAs surfaces. The impact of the nitridation process on the MOS interface properties is quantitatively examined. The plasma nitridation process is observed to form a nitrided layer at the InGaAs surface. The nitridation using microwave power (P{sub microwave}) of 250 W and nitridation time (t{sub nitridation}) of 420 s can form Al{sub 2}O{sub 3}/InGaAs MOS interfaces with a minimum D{sub it} value of 2.0 Multiplication-Sign 10{sup 11} cm{sup -2} eV{sup -1}. On the other hand, the nitridation process parameters such as P{sub microwave} and t{sub nitridation} are found to strongly alter D{sub it} (both decrease and increase are observed) and capacitance equivalent thickness (CET). It is found that the nitridation with higher P{sub microwave} and shorter t{sub nitridation} can reduce D{sub it} with less CET increase. Also, it is observed that as t{sub nitridation} increases, D{sub it} decreases first and increases later. It is revealed from XPS analyses that minimum D{sub it} can be determined by the balance between the saturation of nitridation and the progress of oxidation. As a result, it is found that the superior MOS interface formed by the nitridation is attributable to the existence of oxide-less InGaN/InGaAs interfaces.

Hoshii, Takuya; Lee, Sunghoon; Suzuki, Rena; Taoka, Noriyuki; Yokoyama, Masafumi; Takenaka, Mitsuru; Takagi, Shinichi [Department of Electrical Engineering and Information Systems, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Yamada, Hishashi; Hata, Masahiko [Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki 300-3294 (Japan); Yasuda, Tetsuji [National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)

2012-10-01T23:59:59.000Z

315

Aluminum/TPG Metal Matrix Composite with Improved Thermal ...  

Science Conference Proceedings (OSTI)

It was found that A356/TPG interface was optimal for the examined MMC's high thermal conductivity. Low cooling rates assisted in reducing thermal stresses at ...

316

Metal-Matrix Composites: Aluminum, Titanium, Processing ... - TMS  

Science Conference Proceedings (OSTI)

Mar 1, 2008 ... TMS Member price: 256.00. Non-member price: 336.00. TMS Student Member price: 256.00. Product In Stock. Description With the purpose of ...

317

Review on Recycling of Light Metals (Magnesium and Aluminum)  

Science Conference Proceedings (OSTI)

Selective Recovery of Gold from E-wastes by Using Cellulosic Wastes · Stabilization of Chromium-Based Slags with FeS2 and FeSO4 · Sulphide Precipitation ...

318

Thin-Film Solar Cell Fabricated on a Flexible Metallic Substrate  

SciTech Connect

A thin-film solar cell (10) is provided. The thin-film solar cell (10) comprises a flexible metallic substrate (12) having a first surface and a second surface. A back metal contact layer (16) is deposited on the first surface of the flexible metallic substrate (12). A semiconductor absorber layer (14) is deposited on the back metal contact. A photoactive film deposited on the semiconductor absorber layer (14) forms a heterojunction structure and a grid contact (24) deposited on the heterjunction structure. The flexible metal substrate (12) can be constructed of either aluminium or stainless steel. Furthermore, a method of constructing a solar cell is provided. The method comprises providing an aluminum substrate (12), depositing a semiconductor absorber layer (14) on the aluminum substrate (12), and insulating the aluminum substrate (12) from the semiconductor absorber layer (14) to inhibit reaction between the aluminum substrate (12) and the semiconductor absorber layer (14).

Tuttle, J. R.; Noufi, R.; Hasoon, F. S.

2006-05-30T23:59:59.000Z

319

Potential for Generation of Flammable Mixtures of Hydrogen from Aluminum-Grout Interaction in the K Basins During Basin Grouting  

DOE Green Energy (OSTI)

During the course of deactivation and decommissioning (D&D) of the K-Basins, the basins will be partially filled with grout so as to immobilize residual equipment and debris. Some of this residual debris, principally empty fuel canisters, identification tags, and long-handled tools, contain aluminum metal. The aluminum metal will corrode when contacted with the high pH grout, resulting in the generation of hydrogen. Pacific Northwest National Laboratory (PNNL) evaluated existing experimental and analytical studies of this issue to (1) determine whether sufficient hydrogen will be generated and collected during the K-Basins grouting activity to potentially create the conditions for hydrogen deflagration/explosion and (2) identify process constraints that will provide assurance that the conditions for hydrogen deflagration/explosion will not exist. Based on the review of available experimental and analytical studies, it was concluded that the likelihood of generating a flammable mixture of hydrogen from interaction of residual aluminum metal with grout is low but not zero. However, a flammable mixture of hydrogen will not be generated anywhere in the basin facility during grouting of the KE Basin as long as the following conditions are met: (1) The residual aluminum metal inventory in the basin, especially the fuel canisters, are not stacked on top of one another. This will prevent over-concentrating the aluminum metal inventory over a small surface area of the basin floor. (2) The temperature of the grout is maintained below 90 C (194 F) during pouring and at least three hours after the aluminum metal has been covered (lower grout temperatures result in lower hydrogen generation rates). After about three hours immersed in the grout, an oxide or corrosion layer has formed on the aluminum metal significantly reducing the corrosion/hydrogen generation rates assumed in this analysis. (3) The basin water temperature is maintained at less than 60 C (140 F) for at least three hours after interruption of the grout pour if the aluminum metal in the basin has not been completely covered (so as to minimize reaction of the uncovered aluminum metal with Ca(OH)2). This can effectively be done by ensuring that the basin water temperature is less than 70 F (21 C) prior to initiating grouting of the basin and ensuring that the basin water level is at least 10 feet above the surface of the grout. (4) The basin water is not removed at the same time as grout is being poured (to avoid removing the hydrogen to another potential collection point). This condition is not necessary if the water removal system is appropriately vented to prevent accumulation of hydrogen in the system or after the aluminum metal has been covered with grout for at least three hours. These conclusions are supported as long as the amount and physical configuration of the residual aluminum inventory in the KE Basin is consistent with the assumptions described in Appendix A.

Short, Steven M.; Parker, Brian M.

2005-04-29T23:59:59.000Z

320

Spray Rolling Aluminum Strip for Transportation Applications  

SciTech Connect

Spray rolling is a novel strip casting technology in which molten aluminum alloy is atomized and deposited into the roll gap of mill rolls to produce aluminum strip. A combined experimental/modeling approach has been followed in developing this technology with active participation from industry. The feasibility of this technology has been demonstrated at the laboratory scale and it is currently being scaled-up. This paper provides an overview of the process and compares the microstructure and properties of spray-rolled 2124 aluminum alloy with commercial ingot-processed material

Kevin M. McHugh; Y. Lin; Y. Zhou; E. J. Lavernia; J.-P. Delplanque; S. B. Johnson

2005-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

High Strength Aluminum Brazing Sheets for Condenser Fins of ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Aluminum Alloys: Development, Characterization and Applications.

322

Method For Improving The Oxidation Resistance Of Metal Substrates Coated With Thermal Barrier Coatings  

DOE Patents (OSTI)

A method for providing a protective coating on a metal-based substrate is disclosed. The method involves the application of an aluminum-rich mixture to the substrate to form a discontinuous layer of aluminum-rich particles, followed by the application of a second coating over the discontinuous layer of aluminum-rich particles. Aluminum diffuses from the aluminum-rich layer into the substrate, and into any bond coat layer which is subsequently applied. Related articles are also described. A method for providing a protective coating on a metal-based substrate is disclosed. The method involves the application of an aluminum-rich mixture to the substrate to form a discontinuous layer of aluminum-rich particles, followed by the application of a second coating over the discontinuous layer of aluminum-rich particles. Aluminum diffuses from the aluminum-rich layer into the substrate, and into any bond coat layer which is subsequently applied. Related articles are also described.

Thompson, Anthony Mark (Niskayuna, NY); Gray, Dennis Michael (Delanson, NY); Jackson, Melvin Robert (Niskayuna, NY)

2003-05-13T23:59:59.000Z

323

ALS Visitors  

NLE Websites -- All DOE Office Websites (Extended Search)

Quick Facts Quick Facts ALS Visitors Print ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

324

Metal-air battery assessment  

DOE Green Energy (OSTI)

The objective of this report is to evaluate the present technical status of the zinc-air, aluminum/air and iron/air batteries and assess their potential for use in an electric vehicle. In addition, this report will outline proposed research and development priorities for the successful development of metal-air batteries for electric vehicle application. 39 refs., 25 figs., 11 tabs.

Sen, R.K.; Van Voorhees, S.L.; Ferrel, T.

1988-05-01T23:59:59.000Z

325

Metal Aminoboranes  

Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. Metal aminoboranes are hydrogen storage materials. Metal aminoboranes are also precursors for synthesizing other metal aminoboranes. Metal aminoboranes can be ...

326

Surface chemical reaction of laser ablated aluminum sample for detonation initiation  

Science Conference Proceedings (OSTI)

We explore the evolution of metal plasma generated by high laser irradiances and its effect on the surrounding air by using shadowgraph images after laser pulse termination; hence the formation of laser supported detonation and combustion processes has been investigated. The essence of the paper is in observing initiation of chemical reaction between ablated aluminum plasma and oxygen from air by inducing high power laser pulse (>1000 mJ/pulse) and conduct a quantitative comparison of chemically reactive laser initiated waves with the classical detonation of exploding aluminum (dust) cloud in air. Findings in this work may lead to a new method of initiating detonation from metal sample in its bulk form without the need of mixing nano-particles with oxygen for initiation.

Kim, Chang-hwan; Yoh, Jack J. [School of Mechanical and Aerospace Engineering, Seoul National University, 599 Kwanakro, Kwanakgu, Seoul, Korea 151-742 (Korea, Republic of)

2011-05-01T23:59:59.000Z

327

Locational analysis for the aluminum industry  

SciTech Connect

A locational analysis for the aluminum industry suggests that its locational pattern is probably even more clear-cut than that of the steel industry. Because the smelting of alumina into aluminum requires a very large amount of electric power, aluminum has become an industry highly oriented to cheap-power locations. A quick analysis, taking into account present technological and economic conditions, reveals that the potential advantages of the minimum-transport-cost location for an aluminum plant are clearly outweighed by the large power cost savings accruing from locating the plant at a cheap-power location. This holds true even with a fairly small differential in power rates between the two locations.

Isard, W.; Parcels, L.

1977-12-01T23:59:59.000Z

328

Energy Efficient Heat Treatment for Linerless Hypereutectic Al-Si ...  

Science Conference Proceedings (OSTI)

Heat treatment standards developed by the aluminum industry over the last several decades are often not ... Vacuum HPDC of an actual hypereutectic Al-20 %Si motorcycle engine block con- ... formance and reducing oil consumption (Ref 1, 4, 6). The ... the specific cast component sections that are of research and.

329

Production of Gas-Solid Structures in Aluminum and Nickel Alloys by Gasar Processing  

DOE Green Energy (OSTI)

Experimental data on directional and bulk solidification of hydrogen-charged samples of aluminum alloy A356 and nickel alloy Inconel 718 are discussed. The solidification structure of the porous zone is shown to be dependent on many process variables. Of these variables, hydrogen content in the melt prior to solidification, and furnace atmospheric pressure during solidification play the decisive role. Also important are the furnace atmosphere composition, the solidification velocity, and the temperature distribution of the liquid metal inside the mold.

Apprill, J.M.; Baldwin, M.D.; Maguire, M.C.; Miszkiel, M.E.; Shapovalov, V.I.

1999-01-06T23:59:59.000Z

330

Development of Bulk Metallic Glasses with High Plasticity Using the ...  

Science Conference Proceedings (OSTI)

Air-Oxidation of a (Zr55Cu30Al10Ni5)98Er2 Bulk Metallic Glass at 350-500oc · Anelastic Deformation of a Metallic Glass · Anisotropy in Metallic Glasses.

331

(Polyfluoroaryl)fluoroanions of aluminum, gallium, and indium of enhanced utility, uses thereof, and products based thereon  

DOE Patents (OSTI)

The (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are novel weakly coordinating anions which are are highly fluorinated. (Polyfluoroaryl)fluoroanions of one such type contain at least one ring substituent other than fluorine. These (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium have greater solubility in organic solvents, or have a coordinative ability essentially equal to or less than that of the corresponding (polyfluoroaryl)fluoroanion of aluminum, gallium, or indium in which the substituent is replaced by fluorine. Another type of new (polyfluoroaryl)fluoroanion of aluminum, gallium, and indium have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups. When used as a cocatalyst in the formation of novel catalytic complexes with d- or f-block metal compounds having at least one leaving group such as a methyl group, these anions, because of their weak coordination to the metal center, do not interefere in the ethylene polymerization process, while affecting the the propylene process favorably, if highly isotactic polypropylene is desired. Thus, the (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium of this invention are useful in various polymerization processes such as are described.

Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

2001-01-01T23:59:59.000Z

332

Co-precipitation synthesis and sintering of yttrium aluminum garnet (YAG) powders: the eect of precipitant  

E-Print Network (OSTI)

Vacuum sintering was performed in a furnace heated by a tungsten-mesh heater (Model M60-3X8-WW-23, Nemus co-precipitated from a mixed solution of aluminum and yttrium nitrates using ammonia water of ammonia water produced a hydroxide pre- cursor with an approximate composition of Al(OH)3 .0.3[Y2(OH)5(NO3

Lee, Jong-Heun

333

Quench-age method for the fabrication of niobium-aluminum superconductors  

DOE Patents (OSTI)

A flexible Nb.sub.3 Al superconducting wire is fabricated from a niobium-aluminum composite wire by heating to form a solid solution which is retained at room temperature as a metastable solid solution by quenching. The metastable solid solution is then transformed to the stable superconducting A-15 phase by low temperature aging. The transformation induced by aging can be controlled to yield either a multifilamentary or a solid A-15 core surrounded by ductile niobium.

Pickus, Milton R. (Oakland, CA); Ciardella, Robert L. (Cardiff, CA)

1978-01-01T23:59:59.000Z

334

Climate VISION: Private Sector Initiatives: Aluminum: GHG Information -  

Office of Scientific and Technical Information (OSTI)

Industry Analysis Briefs Industry Analysis Briefs The Energy Information Agency (EIA) is currently updating industry analysis briefs for the most energy-intensive industries in the United States, including aluminum, chemicals, forest products (such as paper and wood products), glass, metal casting, petroleum and coal products, and steel. As soon as the current briefs are available, we will provide the link. Industry Analysis Briefs will have the following content: Economic Profile and Trends Value of Shipments Annual Production Labor Productivity Energy Use Energy Use by Fuel Fuel Consumption by End Use Energy Consumption by Sector Energy Expenditures Onsite Generation (if applicable) Energy Intensity State-Level Information Technologies and Equipment Cogeneration Technologies (if applicable)

335

TEST RESULTS FROM GAMMA IRRADIATION OF ALUMINUM OXYHYDROXIDES  

DOE Green Energy (OSTI)

Hydrated metal oxides or oxyhydroxides boehmite and gibbsite that can form on spent aluminum-clad nuclear fuel assemblies during in-core and post-discharge wet storage were exposed as granular powders to gamma irradiation in a {sup 60}Co irradiator in closed laboratory test vessels with air and with argon as separate cover gases. The results show that boehmite readily evolves hydrogen with exposure up to a dose of 1.8 x 10{sup 8} rad, the maximum tested, in both a full-dried and moist condition of the powder, whereas only a very small measurable quantity of hydrogen was generated from the granular powder of gibbsite. Specific information on the test setup, sample characteristics, sample preparation, irradiation, and gas analysis are described.

Fisher, D.; Westbrook, M.; Sindelar, R.

2012-02-01T23:59:59.000Z

336

VOLATILE CHLORIDE PROCESS FOR THE RECOVERY OF METAL VALUES  

DOE Patents (OSTI)

A process is presented for recovering uranium, iron, and aluminum from centain shale type ores which contain uranium in minute quantities. The ore is heated wiih a chlorinating agent. such as chlorine, to form a volatilized stream of metal chlorides. The chloride stream is then passed through granular alumina which preferentially absorbs the volatile uranium chloride and from which the uranium may later be recovered. The remaining volatilized chlorides, chiefly those of iron and aluminum, are further treated to recover chlorine gas for recycle, and to recover ferric oxide and aluminum oxide as valuable by-products.

Hanley, W.R.

1959-01-01T23:59:59.000Z

337

Effect of aluminum and silicon reactants and process parameters on glass-ceramic waste form characteristics for immobilization of high-level fluorinel-sodium calcined waste  

SciTech Connect

In this report, the effects of aluminum and silicon reactants, process soak time and the initial calcine particle size on glass-ceramic waste form characteristics for immobilization of the high-level fluorinel-sodium calcined waste stored at the Idaho Chemical Processing Plant (ICPP) are investigated. The waste form characteristics include density, total and normalized elemental leach rates, and microstructure. Glass-ceramic waste forms were prepared by hot isostatically pressing (HIPing) a pre-compacted mixture of pilot plant fluorinel-sodium calcine, Al, and Si metal powders at 1050{degrees}C, 20,000 psi for 4 hours. One of the formulations with 2 wt % Al was HIPed for 4, 8, 16 and 24 hours at the same temperature and pressure. The calcine particle size range include as calcined particle size smaller than 600 {mu}m (finer than {minus}30 mesh, or 215 {mu}m Mass Median Diameter, MMD) and 180 {mu}m (finer than 80 mesh, or 49 {mu}m MMD).

Vinjamuri, K.

1993-06-01T23:59:59.000Z

338

New Opportunities for Metals Extraction and Waste Treatment by Electrochemical Processing in Molten Salts  

E-Print Network (OSTI)

Molten salt electrolysis is a proven technology for the extraction of metals -- all the world's primary aluminum is produced in this manner. The unique properties of molten salts also make them

Sadoway, Donald R.

2001-01-01T23:59:59.000Z

339

AL. I  

Office of Legacy Management (LM)

AL. I AL. I Department of Energy Washington, DC 20545 OCT 13 Vii87 Mr. John T. Shields A214 National Fertilizer Development Center Tennessee Valley Authority Muscle Shoals, Alabama 35660 Dear Mr. Shields: As you may know, the Department of Energy (DOE) is evaluating the radiological condition of sites that were utilized under the Manhattan Engineer District and the Atomic Energy Commission (AEC) during the early years of nuclear development to determine whether they need remedial action and whether the Department has authority to perform such action. AEC work at the TVA during the period 1951 through 1955 involved the development of a process to recover uranium from the production of phosphate fertilizer. A laboratory and pilot plant were operated at the site, but very little

340

Thin films by metal-organic precursor plasma spray  

Science Conference Proceedings (OSTI)

While most plasma spray routes to coatings utilize solids as the precursor feedstock, metal-organic precursor plasma spray (MOPPS) is an area that the authors have investigated recently as a novel route to thin film materials. Very thin films are possible via MOPPS and the technology offers the possibility of forming graded structures by metering the liquid feed. The current work employs metal-organic compounds that are liquids at standard temperature-pressure conditions. In addition, these complexes contain chemical functionality that allows straightforward thermolytic transformation to targeted phases of interest. Toward that end, aluminum 3,5-heptanedionate (Al(hd){sub 3}), triethylsilane (HSi(C{sub 2}H{sub 5}){sub 3} or HSiEt{sub 3}), and titanium tetrakisdiethylamide (Ti(N(C{sub 2}H{sub 5}){sub 2}){sub 4} or Ti(NEt{sub 2}){sub 4}) were employed as precursors to aluminum oxide, silicon carbide, and titanium nitride, respectively. In all instances, the liquids contain metal-heteroatom bonds envisioned to provide atomic concentrations of the appropriate reagents at the film growth surface, thus promoting phase formation (e.g., Si-C bond in triethylsilane, Ti-N bond in titanium amide, etc.). Films were deposited using a Sulzer Metco TriplexPro-200 plasma spray system under various experimental conditions using design of experiment principles. Film compositions were analyzed by glazing incidence x-ray diffraction and elemental determination by x-ray spectroscopy. MOPPS films from HSiEt{sub 3} showed the formation of SiC phase but Al(hd){sub 3}-derived films were amorphous. The Ti(NEt{sub 2}){sub 4} precursor gave MOPPS films that appear to consist of nanosized splats of TiOCN with spheres of TiO{sub 2} anatase. While all films in this study suffered from poor adhesion, it is anticipated that the use of heated substrates will aid in the formation of dense, adherent films.

Schulz, Douglas L.; Sailer, Robert A.; Payne, Scott; Leach, James; Molz, Ronald J. [North Dakota State University, Fargo, North Dakota 58108-6050 (United States); Sulzer Metco (United States) Inc., Westbury, New York 11590-2724 (United States)

2009-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Dimensionally stable metallic hydride composition  

SciTech Connect

A stable, metallic hydride composition and a process for making such a composition. The composition comprises a uniformly blended mixture of a metal hydride, kieselguhr, and a ballast metal, all in the form of particles. The composition is made by subjecting a metal hydride to one or more hydrogen absorption/desorption cycles to disintegrate the hydride particles to less than approximately 100 microns in size. The particles are partly oxidized, then blended with the ballast metal and the kieselguhr to form a uniform mixture. The mixture is compressed into pellets and calcined. Preferably, the mixture includes approximately 10 vol. % or more kieselguhr and approximately 50 vol. % or more ballast. Metal hydrides that can be used in the composition include Zr, Ti, V, Nb, Pd, as well as binary, tertiary, and more complex alloys of La, Al, Cu, Ti, Co, Ni, Fe, Zr, Mg, Ca, Mn, and mixtures and other combinations thereof. Ballast metals include Al, Cu and Ni.

Heung, Leung K. (Aiken, SC)

1994-01-01T23:59:59.000Z

342

Dimensionally stable metallic hydride composition  

SciTech Connect

A stable, metallic hydride composition and a process for making such a composition are described. The composition comprises a uniformly blended mixture of a metal hydride, kieselguhr, and a ballast metal, all in the form of particles. The composition is made by subjecting a metal hydride to one or more hydrogen absorption/desorption cycles to disintegrate the hydride particles to less than approximately 100 microns in size. The particles are partly oxidized, then blended with the ballast metal and the kieselguhr to form a uniform mixture. The mixture is compressed into pellets and calcined. Preferably, the mixture includes approximately 10 vol. % or more kieselguhr and approximately 50 vol. % or more ballast. Metal hydrides that can be used in the composition include Zr, Ti, V, Nb, Pd, as well as binary, tertiary, and more complex alloys of La, Al, Cu, Ti, Co, Ni, Fe, Zr, Mg, Ca, Mn, and mixtures and other combinations thereof. Ballast metals include Al, Cu and Ni.

Heung, L.K.

1994-03-22T23:59:59.000Z

343

C:\Eco-SSLs\Contaminant Specific Documents\Aluminum\November 2003\Eco-SSL for Aluminum .wpd  

NLE Websites -- All DOE Office Websites (Extended Search)

Aluminum Aluminum Interim Final OSWER Directive 9285.7-60 U.S. Environmental Protection Agency Office of Solid Waste and Emergency Response 1200 Pennsylvania Avenue, N.W. Washington, DC 20460 November 2003 This page intentionally left blank TABLE OF CONTENTS SUMMARY ECO-SSLs FOR ALUMINUM 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2.0 ALUMINUM CHEMISTRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 3.0 EFFECTS OF ALUMINUM ON PLANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1 General Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Essentiality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3.3 Effect on Phosphorus and Calcium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3.4 Differential Tolerance of Plants to Aluminum Toxicity

344

WASHING AND DEMONSTRATION OF THE DWPF FLOWSHEET IN THE SRNL SHIELDED CELLS USING POST ALUMINUM DISSOLUTION TANK 51 SLUDGE SLURRY  

Science Conference Proceedings (OSTI)

The remaining contents of Tank 51 from Sludge Batch 4 will be blended with Purex sludge from Tank 7 to constitute Sludge Batch 5 (SB5). The Savannah River Site (SRS) Liquid Waste Organization (LWO) has completed caustic addition to Tank 51 to perform low temperature Al dissolution on the H-Modified (HM) sludge material to reduce the total mass of sludge solids and Al being fed to the Defense Waste Processing Facility (DWPF). The Savannah River National Lab (SRNL) has also completed aluminum dissolution tests using a 3-L sample of Tank 51 sludge slurry through funding by DOE EM-21. This report documents assessment of downstream impacts of the aluminum dissolved sludge, which were investigated so technical issues could be identified before the start of SB5 processing. This assessment included washing the aluminum dissolved sludge to a Tank Farm projected sodium concentration and weight percent insoluble solids content and DWPF Chemical Process Cell (CPC) processing using the washed sludge. Based on the limited testing, the impact of aluminum dissolution on sludge settling is not clear. Settling was not predictable for the 3-L sample. Compared to the post aluminum dissolution sample, settling after the first wash was slower, but settling after the second wash was faster. For example, post aluminum dissolution sludge took six days to settle to 60% of the original sludge slurry height, while Wash 1 took nearly eight days, and Wash 2 only took two days. Aluminum dissolution did impact sludge rheology. A comparison between the as-received, post aluminum dissolution and washed samples indicate that the downstream materials were more viscous and the concentration of insoluble solids less than that of the starting material. This increase in viscosity may impact Tank 51 transfers to Tank 40. The impact of aluminum dissolution on DWPF CPC processing cannot be determined because acid addition for the Sludge Receipt and Adjustment Tank (SRAT) cycle was under-calculated and thus under-added. Although the sludge was rheologically thick throughout the SRAT and Slurry Mix Evaporator (SME) cycles, this may have been due to the under addition of acid. Aluminum dissolution did, however, impact analyses of the SRAT receipt material. Two methods for determining total base yielded significantly different results. The high hydroxide content and the relatively high soluble aluminum content of the washed post aluminum dissolution sludge likely contributed to this difference and the ultimate under addition of acid. It should be noted that the simulant used to provide input for the SRAT cycle was an inadequate representation of the waste in terms of acid demand, likely due to the differences in the form of aluminum and hydroxide in the simulant and actual waste. Based on the results of this task, it is recommended that: (1) Sludge settling and rheology during washing of the forthcoming Sludge Batch 5 qualification sample be monitored closely and communicated to the Tank Farm. (2) SRNL receive a sample of Tank 51 after all chemical additions have been made and prior to the final Sludge Batch 5 decant for rheological assessment. Rheology versus wt% insoluble solids will be performed to determine the maximum amount of decant prior to the Tank 51 to Tank 40 transfer. (3) As a result of the problem with measuring total base and subsequently under-calculating acid for the DWPF CPC processing of the post aluminum dissolution sludge; (4) Studies to develop understanding of how the sludge titrates (i.e., why different titration methods yield different results) should be performed. (5) Simulants that better match the properties of post aluminum dissolution sludge should be developed. (6) Work on developing an acid calculation less dependant on the total base measurement should be continued.

Pareizs, J; Cj Bannochie, C; Damon Click, D; Erich Hansen, E; Dan Lambert, D; Michael Stone, M

2008-04-28T23:59:59.000Z

345

Reaction of Aluminum with Water to Produce Hydrogen - 2010 Update  

Fuel Cell Technologies Publication and Product Library (EERE)

A Study of Issues Related to the Use of Aluminum for On-Board Vehicular Hydrogen Storage The purpose of this White Paper is to describe and evaluate the potential of aluminum-water reactions for the

346

Strategies for aluminum recycling : insights from material system optimization  

E-Print Network (OSTI)

The dramatic increase in aluminum consumption over the past decades necessitates a societal effort to recycle and reuse these materials to promote true sustainability and energy savings in aluminum production. However, the ...

Li, Preston Pui-Chuen

2005-01-01T23:59:59.000Z

347

Reaction of Aluminum with Water to Produce Hydrogen: A Study...  

NLE Websites -- All DOE Office Websites (Extended Search)

Reaction of Aluminum with Water to Produce Hydrogen A Study of Issues Related to the Use of Aluminum for On-Board Vehicular Hydrogen Storage U.S. Department of Energy Version 2 -...

348

Microstructure and Mechanical Properties of 3003 Aluminum Alloy ...  

Science Conference Proceedings (OSTI)

... reason of property improvement, especially high temperature performance. ... High Strength Aluminum Brazing Sheets for Condenser Fins of Automotive ... predictions for the phase formation in a wide range of commercial aluminum alloys.

349

Surface alloying of silicon into aluminum substrate.  

SciTech Connect

Aluminum alloys that are easily castable tend to have lower silicon content and hence lower wear resistance. The use of laser surface alloying to improve the surface wear resistance of 319 and 320 aluminum alloys was examined. A silicon layer was painted onto the surface to be treated. A high power pulsed Nd:YAG laser with fiberoptic beam delivery was used to carry out the laser surface treatment to enhance the silicon content. Process parameters were varied to minimize the surface roughness from overlap of the laser beam treatment. The surface-alloyed layer was characterized and the silicon content was determined.

Xu, Z.

1998-10-28T23:59:59.000Z

350

A facile electron microscopy method for measuring precipitate volume fractions in AlCuMg alloys  

SciTech Connect

Precipitate volume fraction is an important parameter to estimate the strength of precipitation-hardened metals. In this study, a facile method was applied to measure the precipitate volume fractions in an age-hardened AlCuMg alloy. In this method, the precipitate volume fraction values can be obtained by multiplying the volume precipitate number densities with the averaged precipitate volumes, which can be easily measured in scanning electron microscopy and transmission electron microscopy, respectively. Compared with the conventional method, in which the specimen thickness has to be measured in transmission electron microscopy, the method proposed in this study is more facile to perform. - Highlights: Black-Right-Pointing-Pointer We have proposed a facile method to measure precipitate volume fractions for precipitation-hardened metals. Black-Right-Pointing-Pointer This technique works well for the square-shaped {theta} Prime -phase nano-precipitates in 2xxx aluminum alloys. Black-Right-Pointing-Pointer Interesting is that the proposed method is easy for materials scientists and engineers to perform.

Zhao, X.Q.; Shi, M.J.; Chen, J.H., E-mail: jhchen123@hnu.edu.cn; Wang, S.B.; Liu, C.H.; Wu, C.L.

2012-07-15T23:59:59.000Z

351

Safe and Efficient Traffic Flow for Aluminum Smelters  

Science Conference Proceedings (OSTI)

Abstract Scope, Aluminum smelter design, construction and operation requires: ... and traffic scheduling for vehicles and pedestrians throughout the Smelter.

352

Cathode Connector For Aluminum Low Temperature Smelting Cell  

DOE Patents (OSTI)

Cathode connector means for low temperature aluminum smelting cell for connecting titanium diboride cathode or the like to bus bars.

Brown, Craig W. (Seattle, WA); Beck, Theodore R. (Seattle, WA); Frizzle, Patrick B. (Seattle, WA)

2003-07-16T23:59:59.000Z

353

13th International Conference on Aluminum Alloys (ICAA13)  

Science Conference Proceedings (OSTI)

Nov 29, 2011... electrical power transmission, packaging, building and construction, .... Expanding the Availability of Lightweight Aluminum Alloy Armor Plate ...

354

Distribution of Calcium and Aluminum between Molten Silicon and ...  

Science Conference Proceedings (OSTI)

Presentation Title, Distribution of Calcium and Aluminum between Molten ... Electrochemical deposition of high purity silicon from molten fluoride electrolytes.

355

Nucleation Catalysis Potency of Ceramic Nanoparticles in Aluminum ...  

Science Conference Proceedings (OSTI)

Symposium, Frontiers in Solidification Science. Presentation Title, Nucleation Catalysis Potency of Ceramic Nanoparticles in Aluminum Matrix Nanocomposites .

356

Aluminum Tailor-welded Blanks for High Volume Automotive ...  

Science Conference Proceedings (OSTI)

High Strength Aluminum Brazing Sheets for Condenser Fins of Automotive Heat Exchangers · High Temperature Creep Characterization of A380 Cast ...

357

Lower Cost Lithium Ion Batteries From Aluminum Substituted ...  

Lower Cost Lithium Ion Batteries From Aluminum Substituted Cathode Materials Lawrence Berkeley National Laboratory. Contact LBL About This Technology

358

Cold Water Model Simulation of Aluminum Liquid Fluctuations ...  

Science Conference Proceedings (OSTI)

Symposium, Electrode Technology for Aluminium Production ... Cold Water Model Simulation of Aluminum Liquid Fluctuations Induced by Anodic Gas in New ...

359

NREL Scientists Reveal Origin of Diverse Melting Behaviors of Aluminum Nanoclusters (Fact Sheet)  

DOE Green Energy (OSTI)

Research reveals active role of cluster symmetries on the size-sensitive, diverse melting behaviors of metallic nanoclusters, providing insight to understanding phase changes of nanoparticles for thermal energy storage. Unlike macroscopic bulk materials, intermediate-sized nanoclusters with around 55 atoms inherently exhibit size-sensitive melting changes: adding just a single atom to a nanocluster can cause a dramatic change in melting behavior. Microscopic understanding of thermal behaviors of metal nanoclusters is important for nanoscale catalysis and thermal energy storage applications. However, it is a challenge to obtain a structural interpretation at the atomic level from measured thermodynamic quantities such as heat capacity. Using ab initio molecular dynamics simulations, scientists at the National Renewable Energy Laboratory (NREL) revealed a clear correlation between the diverse melting behaviors of aluminum nanoclusters and cluster core symmetries. These simulations reproduced, for the first time, the size-sensitive heat capacities of aluminum nanoclusters, which exhibit several distinctive shapes associated with the diverse melting behaviors of the clusters. The size-dependent, diverse melting behaviors of the aluminum clusters are attributed to the reduced symmetry (from Td {yields} D2d {yields} Cs) with increasing the cluster sizes and can be used to help design thermal storage materials.

Not Available

2011-10-01T23:59:59.000Z

360

Continuous Heating Dissolution Diagrams of Aluminum Alloys  

Science Conference Proceedings (OSTI)

The method developed by Milkereit et al. [Milkereit et al. 2009] for quenching experiments can be used, to establish continuous heating dissolution diagrams.

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

TABLE OF CONTENTS Aluminum Alloys: Fabrication  

Science Conference Proceedings (OSTI)

Preparation of Al-Li Alloys by Molten Salts Electrolysis ..................................91. Jidong Li, Mingjie Zhang, Tingan Zhang, and Dan Li. Preparation of Al-Sc Alloys by ...

362

Process for production of an aluminum hydride compound  

SciTech Connect

A compound of formula M(AlH.sub.3OR.sup.1).sub.y, wherein R.sup.1 is phenyl substituted by at least one of: (i) an alkoxy group having from one to six carbon atoms; and (ii) an alkyl group having from three to twelve carbon atoms; wherein M is an alkali metal, Be or Mg; and y is one or two.

Allen, Nathan Tait; Butterick, III, Robert; Chin, Arthur Achhing; Miller, Dean Michael; Molzahn, David Craig

2013-08-06T23:59:59.000Z

363

Nanostructures from hydrogen implantation of metals.  

DOE Green Energy (OSTI)

This study investigates a pathway to nanoporous structures created by hydrogen implantation in aluminum. Previous experiments for fusion applications have indicated that hydrogen and helium ion implantations are capable of producing bicontinuous nanoporous structures in a variety of metals. This study focuses specifically on hydrogen and helium implantations of aluminum, including complementary experimental results and computational modeling of this system. Experimental results show the evolution of the surface morphology as the hydrogen ion fluence increases from 10{sup 17} cm{sup -2} to 10{sup 18} cm{sup -2}. Implantations of helium at a fluence of 10{sup 18} cm{sup -2} produce porosity on the order of 10 nm. Computational modeling demonstrates the formation of alanes, their desorption, and the resulting etching of aluminum surfaces that likely drives the nanostructures that form in the presence of hydrogen.

McWatters, Bruce Ray (Sandia National Laboratories, Albuquerque, NM); Causey, Rion A.; DePuit, Ryan J.; Yang, Nancy Y. C.; Ong, Markus D.

2009-09-01T23:59:59.000Z

364

STRIPPING METAL COATINGS  

DOE Patents (OSTI)

A method is described for removing aluminumuranium-silicon alloy bonded to metallic U comprising subjecting the Al-U -Si alloy to treatment with hot concentrated HNO/sun 3/ to partially dissolve and embrittle the alloy and shot- blasting the embrittled alloy to loosen it from the U.

Siefen, H.T.; Campbell, J.M.

1959-02-01T23:59:59.000Z

365

Transmissive metallic contact for amorphous silicon solar cells  

DOE Patents (OSTI)

A transmissive metallic contact for amorphous silicon semiconductors includes a thin layer of metal, such as aluminum or other low work function metal, coated on the amorphous silicon with an antireflective layer coated on the metal. A transparent substrate, such as glass, is positioned on the light reflective layer. The metallic layer is preferably thin enough to transmit at least 50% of light incident thereon, yet thick enough to conduct electricity. The antireflection layer is preferably a transparent material that has a refractive index in the range of 1.8 to 2.2 and is approximately 550A to 600A thick.

Madan, A.

1984-11-29T23:59:59.000Z

366

ALS Project Management Manual  

E-Print Network (OSTI)

management practices across all ALS projects. It describesthat the primary weakness in ALS project management effortsrich projects common at the ALS. It is sometimes difficult

Krupnick, Jim; Harkins, Joe

2000-01-01T23:59:59.000Z

367

Qualification of aluminum for OTEC heat exchangers  

DOE Green Energy (OSTI)

The basis for qualification of aluminum as a material for use as tubing in Ocean Thermal Energy Conversion heat exchangers is reviewed. Reference is made to compendia of data from tests of aluminum alloys in natural sea water and to applicable service records. Data from these sources were found to be inadequate to either qualify or disqualify aluminum. They serve only to identify the 5052 alloy and Alclad 3003 or 3004 as being worthy of additional testing under conditions more directly related to what will be encountered in OTEC heat exchangers. The principal deficiency of data from long-time tests in natural sea water is that in almost all of these tests the specimens were exposed under static conditions that caused the surfaces to be covered by marine fouling organisms that would not be present in heat exchanger tubes. The tests did not take into account possible effects of periodic mechanical or chemical treatments to remove fouling or chemical treatments (chlorination) to prevent fouling. A current testing program sponsored by the Department of Energy through Argonne National Laboratory is designed to provide the needed data. Limited tests in high velocity sea water have indicated that aluminum tubes would tolerate the velocities under 10 ft (3 m) per second likely to be used in OTEC heat exchangers.

LaQue, F.L.

1979-05-01T23:59:59.000Z

368

Method of preparing an electrode material of lithium-aluminum alloy  

DOE Patents (OSTI)

A solid compact having a uniform alloy composition of lithium and aluminum is prepared as a negative electrode for an electrochemical cell. Lithium losses during preparation are minimized by dissolving aluminum within a lithium-rich melt at temperatures near the liquidus temperatures. The desired alloy composition is then solidified and fragmented. The fragments are homogenized to a uniform composition by annealing at a temperature near the solidus temperature. After comminuting to fine particles, the alloy material can be blended with powdered electrolyte and pressed into a solid compact having the desired electrode shape. In the preparation of some electrodes, an electrically conductive metal mesh is embedded into the compact as a current collector.

Settle, Jack L. (Plainfield, IL); Myles, Kevin M. (Downers Grove, IL); Battles, James E. (Oak Forest, IL)

1976-01-01T23:59:59.000Z

369

Metal Aminoboranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Metal Aminoboranes Metal Aminoboranes Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. June 25, 2013 Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. Available for thumbnail of Feynman Center (505) 665-9090 Email Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. Metal aminoboranes are hydrogen storage materials. Metal aminoboranes are also precursors for synthesizing other metal aminoboranes. Metal aminoboranes can be dehydrogenated to form hydrogen and a reaction product. The reaction product can react with hydrogen to form a hydrogen storage material. Metal aminoboranes can be included in a kit. U.S. Patent No.: 7,713,506 (DOE S-112,798)

370

DOE - Office of Legacy Management -- Southern Research Institute - AL 03  

NLE Websites -- All DOE Office Websites (Extended Search)

Southern Research Institute - AL 03 Southern Research Institute - AL 03 FUSRAP Considered Sites Site: SOUTHERN RESEARCH INSTITUTE (AL.03) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: 917 South 20th Street , Birmingham , Alabama AL.03-1 AL.03-2 Evaluation Year: 1993 AL.03-3 Site Operations: Licensed for the period 11/10/55 - 6/1/58. Basic license and three amendments for possession and title to up to 140# of refined source material for research on properties of Uranium-liquid metal fuel elements; conducted research on Uranium in the early 1960's. AL.03-4 AL.03-1 AL.03-5 Site Disposition: Eliminated - No Authority - AEC license to handle nuclear materials AL.03-3 AL.03-6 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium AL.03-1

371

Improved property in organic light-emitting diode utilizing two Al/Alq3 layers  

Science Conference Proceedings (OSTI)

We reported on the fabrication of organic light-emitting devices (OLEDs) utilizing the two Al/Alq"3 layers and two electrodes. This novel green device with structure of Al(110nm)/tris(8-hydroxyquinoline) aluminum (Alq"3)(65nm)/Al(110nm)/Alq"3(50nm)/N,N'-dipheny1-N, ... Keywords: Emitting layer, OLEDS, Transporting layer

Chunlin Zhang; Su Liu; Fangcong Wang; Yong Zhang

2008-12-01T23:59:59.000Z

372

Climate VISION: Private Sector Initiatives: Aluminum: GHG Inventory  

Office of Scientific and Technical Information (OSTI)

GHG Inventory Protocols GHG Inventory Protocols EPA/IAI PFC Measurement Protocol (PDF 243 KB) Download Acrobat Reader EPA and the International Aluminium Institute have collaborated with the global primary aluminium industry to develop a standard facility-specific PFC emissions measurement protocol. Use of the protocol will help ensure the consistency and accuracy of measurements. International Aluminum Institute's Aluminum Sector Greenhouse Gas Protocol (PDF 161 KB) Download Acrobat Reader The International Aluminum Institute (IAI) Aluminum Sector Addendum to the WBCSD/WRI Greenhouse Gas Protocol enhances and expands for the aluminum sector the World Business Council for Sustainable Development/World Resources Institute greenhouse gas corporate accounting and reporting protocol.

373

Climate VISION: Private Sector Initiatives: Aluminum: Resources and Links -  

Office of Scientific and Technical Information (OSTI)

Federal/State Programs Federal/State Programs DOE Aluminum Industry of the Future Collaborative R&D partnerships between DOE Industrial Technologies Program and industry to maximize technology investments. EPA Voluntary Aluminum Industrial Partnership The Voluntary Aluminum Industrial Partnership (VAIP) is an innovative pollution prevention program developed jointly by the U.S. Environmental Protection Agency (EPA) and the primary aluminum industry. Participating companies (Partners) work with EPA to improve aluminum production efficiency while reducing perfluorocarbon (PFC) emissions, potent greenhouse gases that may remain in the atmosphere for thousands of years. See all Federal/State Programs DOE State Activities For information on activities, financial assistance, and solicitations

374

FLOWSHEET FOR ALUMINUM REMOVAL FROM SLUDGE BATCH 6  

Science Conference Proceedings (OSTI)

Samples of Tank 12 sludge slurry show a substantially larger fraction of aluminum than originally identified in sludge batch planning. The Liquid Waste Organization (LWO) plans to formulate Sludge Batch 6 (SB6) with about one half of the sludge slurry in Tank 12 and one half of the sludge slurry in Tank 4. LWO identified aluminum dissolution as a method to mitigate the effect of having about 50% more solids in High Level Waste (HLW) sludge than previously planned. Previous aluminum dissolution performed in a HLW tank in 1982 was performed at approximately 85 C for 5 days and dissolved nearly 80% of the aluminum in the sludge slurry. In 2008, LWO successfully dissolved 64% of the aluminum at approximately 60 C in 46 days with minimal tank modifications and using only slurry pumps as a heat source. This report establishes the technical basis and flowsheet for performing an aluminum removal process in Tank 51 for SB6 that incorporates the lessons learned from previous aluminum dissolution evolutions. For SB6, aluminum dissolution process temperature will be held at a minimum of 65 C for at least 24 days, but as long as practical or until as much as 80% of the aluminum is dissolved. As planned, an aluminum removal process can reduce the aluminum in SB6 from about 84,500 kg to as little as 17,900 kg with a corresponding reduction of total insoluble solids in the batch from 246,000 kg to 131,000 kg. The extent of the reduction may be limited by the time available to maintain Tank 51 at dissolution temperature. The range of dissolution in four weeks based on the known variability in dissolution kinetics can range from 44 to more than 80%. At 44% of the aluminum dissolved, the mass reduction is approximately 1/2 of the mass noted above, i.e., 33,300 kg of aluminum instead of 66,600 kg. Planning to reach 80% of the aluminum dissolved should allow a maximum of 81 days for dissolution and reduce the allowance if test data shows faster kinetics. 47,800 kg of the dissolved aluminum will be stored in Tank 8 and 21,000 kg will be stored in saltcake via evaporation. Up to 77% of the total aluminum planned for SB6 may be removed via aluminum dissolution. Storage of the aluminum-laden supernate in Tank 8 will require routine evaluation of the free hydroxide concentration in order to maintain aluminum in solution. Periodic evaluation will be established on concurrent frequency with corrosion program samples as previously established for aluminum-laden supernate from SB5 that is stored in Tank 11.

Pike, J; Jeffrey Gillam, J

2008-12-17T23:59:59.000Z

375

Impact-resistant boron/aluminum composites for large fan blades  

SciTech Connect

Blade-like specimens were subjected to static ballistic impact testing to determine their relative FOD impact resistance levels. It was determined that a plus or minus 15 deg layup exhibited good impact resistance. The design of a large solid boron/aluminum fan blade was conducted based on the FOD test results. The CF6 fan blade was used as a baseline for these design studies. The solid boron/aluminum fan blade design was used to fabricate two blades. This effort enabled the assessment of the scale up of existing blade manufacturing details for the fabrication of a large B/Al fan blade. Existing CF6 fan blade tooling was modified for use in fabricating these blades.

Oller, T.L.; Salemme, C.T.; Bowden, J.H.; Doble, G.S.; Melnyk, P.

1977-12-01T23:59:59.000Z

376

Reaction Diffusion in the Silver-Zinc and Silver-Aluminum Systems  

SciTech Connect

Multiphase diffusion was investigated in the silver-zinc and silver-aluminum binary systems using metallographic and electron microprobe techniques. Diffusion couples in the silver-zinc system were prepared by electroplating silver onto coupons of a AgZn alloy (62.2% Ag), and diffusion behavior was studied at 600 and 650 degrees C. Couples in the silver-aluminum system were prepared by electroplating silver onto coupons of a AgAl alloy (87.7% Ag) and diffusion measurements were made between 400-600 degrees C. Significant deviations from equilibrium compositions were observed at the moving interphase boundary in each couple. The nucleation of a non-equilibrium silver-rich phase was observed at the location of the initial interface in many of the couples.

Braun, Japnell D.; Powell, Gordon W.

1971-10-01T23:59:59.000Z

377

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Access to the ALS Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to...

378

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register with the ALS...

379

Strong et al ALS FTD consensus criteria  

E-Print Network (OSTI)

Strong et al ALS FTD consensus criteria 1 Version: 20070606 Frontotemporal syndromes in amyotrophic, UCSF, San Francisco, California, USA (5) Forbes Norris MDA/ALS Research Center, San Francisco Kingdom (8) Science Director & Vice President, The ALS Association, Palm Harbor, Florida, U.S.A. (9

Dickerson, Brad

380

THE APPARENT SOLUBILITY OF ALUMINUM(III) IN HANFORD HIGH-LEVEL WASTE TANKS  

SciTech Connect

The solubility of aluminum in Hanford nuclear waste impacts on the process ability of the waste by a number of proposed treatment options. For many years, Hanford staff has anecdotally noted that aluminum appears to be considerably more soluble in Hanford waste than the simpler electrolyte solutions used as analogues. There has been minimal scientific study to confirm these anecdotal observations, however. The present study determines the apparent solubility product for gibbsite in 50 tank samples. The ratio of hydroxide to aluminum in the liquid phase for the samples is calculated and plotted as a function of total sodium molarity. Total sodium molarity is used as a surrogate for ionic strength, because the relative ratios of mono, di and trivalent anions are not available for all of the samples. These results were compared to the simple NaOH-NaAl(OH{sub 4})H{sub 2}O system, and the NaOH-NaAl(OH{sub 4})NaCl-H{sub 2}O system data retrieved from the literature. The results show that gibbsite is apparently more soluble in the samples than in the simple systems whenever the sodium molarity is greater than two. This apparent enhanced solubility cannot be explained solely by differences in ionic strength. The change in solubility with ionic strength in simple systems is small compared to the difference between aluminum solubility in Hanford waste and the simple systems. The reason for the apparent enhanced solubility is unknown, but could include. kinetic or thermodynamic factors that are not present in the simple electrolyte systems. Any kinetic explanation would have to explain why the samples are always supersaturated whenever the sodium molarity is above two. Real waste characterization data should not be used to validate thermodynamic solubility models until it can be confirmed that the apparent enhanced gibbsite solubility is a thermodynamic effect and not a kinetic effect.

REYNOLDS JG

2012-06-20T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Welding of cast A359/SiC/10p metal matrix composites  

E-Print Network (OSTI)

Welding of metal matrix composites (MMCs) is an alternative to their mechanical joining, since they are difficult to machine. Published literature in fusion welding of similar composites shows metallurgical problems. This study investigates the weldability of A359/SiC/10p aluminum SiC MMC. Statistical experiments were performed to identify the significant variables and their effects on the hardness, tensile and bending strengths, ductility, and microstructure of the weld. Finite Element Analysis (FEA) was used to predict the preheat temperature field across the weld and the weld pool temperature. Welding current, welding speed, and the preheat temperature (300-350??C) affected the weld quality significantly. It was seen that the fracture of the welded specimens was either in the base MMC or in the weld indicating a stronger interface between the weld and the base MMC. Oxides formation was controlled along the weld joint. Low heat inputs provided higher weld strengths and better weld integrity. It was found that the weld strengths were approximately 85% of the parent material strength. The weld region had higher extent of uniform mixing of base and filler metal when welded at low currents and high welding speeds. These adequate thermal conditions helped the SiC particles to stay in the central weld region. The interface reaction between the matrix and SiC particles was hindered due to controlled heat inputs and formation of harmful Al4C3 flakes was suppressed. The hardness values were found to be slightly higher in the base metal rich region. There was no significant loss in the hardness of the heat affected zone. The ductility of the weld was considerably increased to 6.0-7.0% due to the addition of Al-Si filler metal.

Kothari, Mitul Arvind

2005-08-01T23:59:59.000Z

382

Investigations on the sediment chronology and trace metal accumulation in Sabine-Neches estuary, Beaumont, Texas  

E-Print Network (OSTI)

The accumulation rates of sediments and trace metals (Co, Cr, Cu, Ni, Pb, Zn) were measured along with the concentrations of Al, Fe, Mn and organic carbon in four sediment cores from Sabine-Neches estuary, near Beaumont, Texas. A reliable geochronology of sediments and reconstruction of the history of trace metal inputs into this shallow estuarine environment was possible because the 239,240pu profiles closely tracked the bomb fallout history into the environment. The sedimentation rate was estimated to be about 4-5 mm/yr. Due to the very low and variable activities of excess 21OPb in the sediments, the 21OPb dating method did not prove to be very useful in the study area. One difficulty had to do with the large variability of grain size parameters in the sediments. The amount of fines varied from 90% within a single core. The activities of excess 21OPb and the concentrations of Al, Fe, organic carbon, and trace metals varied as a function of the amount of fine particles. 21OPb at the bottom of the sediment cores was in secular equilibrium with 226Ra, 23OTh, and 234U in some cores, while in others, this was not the case. The reasons for disagreement between 21OPb and 226Ra concentrations at depth were investigated. The mixing rates of surface sediments were low and was about 0.16-0.40 cm2yr-1. Down core variations of aluminum normalized enrichment factors for trace metals demonstrated that, since 1860, the sediments of this estuary have remained relatively "pristine" with respect to trace metal concentrations. While the concentrations of Pb and Zn in some sections of the sediment column were slightly enriched, Co, Cr, Cu, and Ni were depleted in all sediment cores analyzed. No significant enrichment of light rare earth elements was observed. Enrichment might have been expected from inputs of cracking catalysts used in refineries. Therefore REEs could not be used as non-steady tracers. The lack of strong enrichment of trace metals, light rare earth elements, and low inventories of radioisotopes could be a result of the short residence time of the estuarine water, long removal residence times of trace metals and radioactive elements in the water column, low salinity conditions, and possibly, complexation of these metals with dissolved organic matter.

Ravichandran, Mahalingam

1994-01-01T23:59:59.000Z

383

Shock response of 5083-0 aluminum  

Science Conference Proceedings (OSTI)

Aluminum alloy (5083-0) is used as lightweight armor in armored vehicles. Data on the shock response of this material is useful to simulate ballistic penetration of different nose-shaped penetrators. In this paper we present the dynamic response of 5083-0 aluminum to shock wave loading to 22 GPa. Manganin stress gauges were used to measure the stress wave profiles. Hugoniot elastic limit (HEL) and spall strength were 0.28 GPa and 1.6 GPa, respectively. Shock Hugoniot to stress levels of 10 GPa was determined by embedded in-material gauges and above 10 GPa by measuring shock velocities by embedding manganin gauges at the back surface of stepped targets.

Laber, M. W.; Brar, N. S.; Rosenberg, Z. [Impact Physics Laboratory, University of Dayton Research Institute, Dayton, Ohio 45469-0182 (United States); RAFAEL, P.O. Box 2250 (24), Haifa (Israel)

1998-07-10T23:59:59.000Z

384

Helium-filled aluminum flight tubes  

NLE Websites -- All DOE Office Websites (Extended Search)

Helium-filled aluminum flight tubes. Helium-filled aluminum flight tubes. Detector housing for the CCD camera lens, mirror, and scintillator. For more information, contact Instrument Scientist: Hassina Bilheux, bilheuxhn@ornl.gov, 865.384.9630 neutrons.ornl.gov/instruments/HFIR/factsheets/Instrument-cg1d.pdf The CG-1D beam is used for neutron imaging measurements using a white beam. Apertures (with different diameters D (pinhole geometry) are used at the entrance of the helium-filled flight path to allow L/D variation from 400 to 800. L is the distance between the aperture and the detector (where the image is produced). Samples sit on a translation/ rotation stage for alignment and tomography purposes. Detectors for CG-1D include

385

Climate VISION: Private Sector Initiatives: Aluminum: Results  

Office of Scientific and Technical Information (OSTI)

Results Results The Aluminum Association and the federal government have document progress in the Climate Vision program. The results are measured by metrics developed by the industry, in partnership with the government, and reported. Progress will also be tracked under the umbrella of the Voluntary Aluminum Industrial Partnership website. Please check back on this website and the Energy Information Agency website for updates. In 2005, the industry achieved the goal set for 2010. A 56 percent reduction in direct process emissions per ton of production, including combined reductions in PFC's and CO2, exceeds the 53 percent commitment for 2010. Further progress is expected in the industry, however complications from high power costs and potential curtailments make predictions for further reductions

386

Inert anodes and advanced smelting of aluminum  

SciTech Connect

This report provides a broad assessment of open literature and patents that exist in the area of inert anodes and their related cathode systems and cell designs, technologies that are relevant for the advanced smelting of aluminum. The report also discusses the opportunities, barriers, and issued associated with these technologies from a technical, environmental, and economic viewpoint. It discusses the outlook for the direct retrofit of advanced reduction technologies to existing aluminum smelters, and compares retrofits to ''brown field'' usage and ''green field'' adoption of the technologies. A number of observations and recommendations are offered for consideration concerning further research and development efforts that may be directed toward these advanced technologies. The opportunities are discussed in the context of incremental progress that is being made in conventional Hall-Heroult cell systems.

ASME Technical Working Group on Inert Anode Technologies

1999-07-01T23:59:59.000Z

387

SEPARATION OF METAL SALTS BY ADSORPTION  

DOE Patents (OSTI)

It has been found that certain metal salts, particularly the halides of iron, cobalt, nickel, and the actinide metals, arc readily absorbed on aluminum oxide, while certain other salts, particularly rare earth metal halides, are not so absorbed. Use is made of this discovery to separate uranium from the rare earths. The metal salts are first dissolved in a molten mixture of alkali metal nitrates, e.g., the eutectic mixture of lithium nitrate and potassium nitrate, and then the molten salt solution is contacted with alumina, either by slurrying or by passing the salt solution through an absorption tower. The process is particularly valuable for the separation of actinides from lanthanum-group rare earths.

Gruen, D.M.

1959-01-20T23:59:59.000Z

388

Al-Cu-Li-Mg-Zn  

Science Conference Proceedings (OSTI)

High Strength Aluminum Brazing Sheets for Condenser Fins of Automotive Heat ... for the Phase Formation in a Wide Range of Commercial Aluminum Alloys.

389

Aluminum doped zinc oxide for organic photovoltaics  

Science Conference Proceedings (OSTI)

Aluminum doped zinc oxide (AZO) was grown via magnetron sputtering as a low-cost alternative to indium tin oxide (ITO) for organic photovoltaics (OPVs). Postdeposition ozone treatment resulted in devices with lower series resistance, increased open-circuit voltage, and power conversion efficiency double that of devices fabricated on untreated AZO. Furthermore, cells fabricated using ozone treated AZO and standard ITO displayed comparable performance.

Murdoch, G. B.; Hinds, S.; Sargent, E. H.; Tsang, S. W.; Mordoukhovski, L.; Lu, Z. H. [Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, Ontario M5S 3E4 (Canada)

2009-05-25T23:59:59.000Z

390

ALS Ceramics Materials Research Advances Engine Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Ceramics Materials Research ALS Ceramics Materials Research Advances Engine Performance ALS Ceramics Materials Research Advances Engine Performance Print Thursday, 27 September 2012 00:00 LBNL senior materials scientist and UC Berkeley professor Rob Ritchie has been researching the fracture behavior of a wide array of materials for the past 40 years, the last ten of them using the facilities at the ALS. From human bone to synthetic engineering materials such as shape-memory metals and composites, Ritchie has illuminated groundbreaking cracking patterns and the underlying mechanistic processes using the x-ray synchrotron micro-tomography at ALS Beamline 8.3.2. Summary Slide ritchie ceramics This 3D image of a ceramic composite specimen imaged under load at 1750C shows the detailed fracture patterns that researchers are able to view using ALS Beamline 8.3.2. The vertical white lines are the individual silicon carbide fibers in this sample about 500 microns in diameter.

391

X-ray absorption spectroscopy of aluminum z-pinch plasma with tungsten backlighter planar wire array source  

Science Conference Proceedings (OSTI)

Absorption features from K-shell aluminum z-pinch plasmas have recently been studied on Zebra, the 1.7 MA pulse power generator at the Nevada Terawatt Facility. In particular, tungsten plasma has been used as a semi-backlighter source in the generation of aluminum K-shell absorption spectra by placing a single Al wire at or near the end of a single planar W array. All spectroscopic experimental results were recorded using a time-integrated, spatially resolved convex potassium hydrogen phthalate (KAP) crystal spectrometer. Other diagnostics used to study these plasmas included x-ray detectors, optical imaging, laser shadowgraphy, and time-gated and time-integrated x-ray pinhole imagers. Through comparisons with previous publications, Al K-shell absorption lines are shown to be from much lower electron temperature ({approx}10-40 eV) plasmas than emission spectra ({approx}350-500 eV).

Osborne, G. C.; Kantsyrev, V. L.; Safronova, A. S.; Esaulov, A. A.; Weller, M. E.; Shrestha, I.; Shlyaptseva, V. V. [Physics Department, University of Nevada, Reno, Reno, Nevada 89557 (United States); Ouart, N. D. [Naval Research Laboratory, Washington, D.C. 20375 (United States)

2012-10-15T23:59:59.000Z

392

Rem&al Action Performed  

Office of Legacy Management (LM)

Rem&al Action Performed Rem&al Action Performed at the B&T Metals Site in * Columbus, Ohio Department of Energy Office of Assistant Manager for Environmenta/ Management Oak Ridge Operations June 2007 Printed on recycled/recyclable paper. 1.41 2503.2 CERTIFICATION DOCKET FOR THE REMEDIAL ACTION PER-FORMED AT THE B&T METALS SITE IN COLUMBUS, OHIO JUNE 200 1 Prepared for United States Department of Energy Under Contract No. DACW45-98-D-0028 BY Bechtel National, Inc. Oak Ridge, Tennessee Bechtel Job No. 14501 B&TFinal 6/2001 CONTENTS FIGURES ..................................................................................................................................................... iv ACRON-YhiS ...............................................................................................................................................

393

Measuring Sub-micron Size Fractionated Particulate Matter on Aluminum Impactor Disks  

SciTech Connect

Sub-micron sized airborne particulate matter is not collected well on regular quartz or glass fiber filter papers. We used a micro-orifice uniform deposit impactor (MOUDI) to size fractionate particulate matter (PM) into six size fractions and deposit it on specially designed high purity thin aluminum disks. The MOUDI separated PM into fractions 56-100 nm, 100-180 nm, 180-320 nm, 320-560 nm, 560-1000 nm, and 1000-1800 nm. Since MOUDI have low flow rates, it takes several days to collect sufficient carbon on 47 mm foil disks. The small carbon mass (20-200 microgram C) and large aluminum substrate ({approx}25 mg Al) presents several challenges to production of graphite targets for accelerator mass spectrometry (AMS) analysis. The Al foil consumes large amounts of oxygen as it is heated and tends to melt into quartz combustion tubes, causing gas leaks. We describe sample processing techniques to reliably produce graphitic targets for {sup 14}C-AMS analysis of PM deposited on Al impact foils.

Buchholz, B A; Zermeno, P; Hwang, H; Young, T M

2009-07-28T23:59:59.000Z

394

Structure of molten Al and eutectic Al-Si alloy studied by neutron diffraction  

Science Conference Proceedings (OSTI)

The structure of molten eutectic Al87.8Si12.2 alloy has been studied by neutron diffraction during a temperature cycle. For comparison measurements were performed on pure molten Al. The measurements show that the alloy after heating above the liquidus contains particles of two kinds, aluminum-rich and silicon-rich. The silicon-rich particles are partly dissolved after a further heating. Earlier published data obtained by the ?-ray absorption technique of the density of the molten eutectic Al–Si alloy had demonstrated the existence of two temperatures above the liquidus temperature: A dissolution temperature Td, at which the microstructure of the melt inherited from the ingot starts to dissolve and a branching temperature, Tb, at which the melt reaches a fully mixed state. The highest temperature that was possible to reach during the neutron experiments lies between Td and Tb. The obtained results support these conclusions that molten alloys after melting are inhomogeneous up to a temperature well above the liquidus. Moreover, the difference in shape between the static structure factors measured by neutron and X-ray diffraction on molten aluminum is observed and is found to be more accentuated and to extend to larger wavevectors than in earlier works.

Dahlborg, U. [University of Rouen; Kramer, Matthew J. [Ames Laboratory; Besser, M. [Ames Laboratory; Morris, J. R. [Oak Ridge National Laboratory; Calvo-Dahlborg, M. [University of Rouen

2012-11-24T23:59:59.000Z

395

In situ microscopy of rapidly heated nano-Al and nano-Al/WO{sub 3} thermites  

Science Conference Proceedings (OSTI)

The initiation and reaction mechanism of nano-Al and nano-Al thermites in rapid heating environments is investigated in this work. A semiconductor-based grid/stage was used, capable of in situ heating of a sample from room temperature to 1473 K, and at a rate of 10{sup 6} K/s, inside an electron microscope. Nano-Al was rapidly heated in a transmission electron microscope, and before and after images indicate that the aluminum migrates through the shell, consistent with a diffusion-based mechanism. A nano-Al/WO{sub 3} composite was then heated in a scanning electron microscope. The results indicate that a reactive sintering mechanism is occurring for the nano-Al/WO{sub 3} thermite, as the products are found to be in surface contact and significantly deformed after the heating pulse.

Sullivan, Kyle T.; Zachariah, Michael R. [University of Maryland, College Park, Maryland 20742 (United States); Chiou, Wen-An [NISP Laboratory, NanoCenter, University of Maryland, College Park, Maryland 20742 (United States); Fiore, Richard [Protochips Inc., 617 Hutton Street, Suite 111, Raleigh, North Carolina 27606 (United States)

2010-09-27T23:59:59.000Z

396

Joining Uranium to Aluminum using Electron Beam Welding and an Explosively Clad Niobium Interlayer  

SciTech Connect

A uranium alloy was joined to a high strength aluminum alloy using a commercially pure niobium interlayer. Joining of the Nb interlayer to the aluminum alloy was performed using an explosive welding process, while joining the Nb interlayer to the uranium alloy was performed using an electron beam welding process. Explosive welding was selected to bond the Nb to the aluminum alloy in order to minimize the formation of brittle intermetallic phases. Electron beam welding was selected to join the Nb to the uranium alloy in order to precisely control melting so as to minimize mixing of the two metals. A Modified Faraday Cup (MFC) technique using computer-assisted tomography was employed to determine the power distribution of the electron beam so that the welding parameters could be directly transferred to other welding machines. Optical microscopy, scanning electron microscopy, microhardness, and tensile testing of the welds were used to characterize the resulting joints. This paper presents the welding techniques and processing parameters that were developed to produce high integrity ductile joints between these materials.

Elmer, J W; Terrill, P; Brasher, D; Butler, D

2001-06-12T23:59:59.000Z

397

Detection of Subsurface Flaws in Metals with GMR Sensors  

Science Conference Proceedings (OSTI)

Cracks and flaws in multilayered nonferrous metal structure may be quantified by using Giant Magnetoresistive (GMR) sensor based eddy current technique. This noncontact method includes a lift-off distance as great as 3 mm. Aluminum and titanium alloy plates greater than 3 mm thick are successfully inspected. Hidden flaws in second plate down are clearly detected.

Na, J.K.; Franklin, M.A. [Advanced Nondestructive Inspection, General Dynamics, 2700 Indian Ripple Road, Dayton, Ohio 45440 (United States)

2005-04-09T23:59:59.000Z

398

Observation of isolated nanopores formed by patterned anodic oxidation of aluminum thin films  

SciTech Connect

We report the formation of confined nanometer-scale regions of porous anodic alumina from thin aluminum films. Confinement is achieved by masking a thin Al film with a sputtered SiO{sub 2} layer, patterned by nanoimprint lithography of a polystyrene transfer layer. Anodization in 0.3 molar oxalic acid creates vertically aligned pores that were imaged with a combination of focused ion beam milling and scanning electron microscopy. Triplets, pairs, and single pores were observed following the anodization of isolated mask features approximately 100 nm in diameter.

Huang Qiyu; Lye, W.-K.; Reed, Michael L. [School of Microelectronics, Shanghai Jiaotong University, 1954 Huashan Road, Shanghai 200030 (China); Department of Electrical and Computer Engineering University of Virginia, Charlottesville, Virginia 22904 (United States)

2006-06-05T23:59:59.000Z

399

The aqueous chemistry of aluminum: A new approach to high temperature solubility measurements  

DOE Green Energy (OSTI)

The solubility of boehmite, AlO(OH), has been measured as a function of pH (2-10, depending on ionic strength) temperature (100- 250{degrees}C) and ionic strength (0.03-1 molal, NaCl) in a hydrogen- electrode concentration cell, HECC, which provided in situ measurement of hydrogen ion molality. Samples of the solution were withdrawn after the pH reading stabilized for analysis of total aluminum content by ion chromatography. Acidic or basic titrant could then be metered into the cell to affect a change in the pH of the solution. The direction of approach to the equilibrium saturated state could be readily varied to ensure that the system was reversible thermodynamically. This represents our second application of direct pH measurement to high temperature solubility studies. The results as low ionic strength are compared with those from two recently-reported high-temperature studies of boehmite solubility, which relied on the conventional batch technique. Comparisons are also made with the low temperature (<90{degrees}C) hydrolysis constants for aluminum garnered from solubility measurements with gibbsite as the stable phase. Based on these preliminary results, it is possible to draw some general conclusions concerning the relative importance of the aluminum species in solution and to reduce significantly the number of experiments needed to define this complex system in a thermodynamic sense.

Palmer, D.A.; Wesolowski, D.J.; Benezeth, P.

1996-01-01T23:59:59.000Z

400

Cold Spray Processing of Bulk Nanostructured Aluminum Alloys  

Science Conference Proceedings (OSTI)

This research demonstrates the ability to fabricate billet size samples of a nanocrystalline aluminum alloy (AA5083) via CSP in a relatively quick, low cost, and ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Towards Industrial Aluminum Spent Pot Lining Treatment with ...  

Science Conference Proceedings (OSTI)

The development of a conversion process for the fluorinated end-product would allow its reuse as a substitute to fluorspar mineral for aluminum fluoride ...

402

Simulation of Aluminum Shape Casting Processing: From Alloy - TMS  

Science Conference Proceedings (OSTI)

Sep 24, 2007 ... "The objective of the TMS Symposium on the "Simulation of Aluminum Shape Casting Processing" From Alloy Design to Mechanical Properties" ...

403

Fracture of welded aluminum thin-walled structures  

E-Print Network (OSTI)

A comprehensive methodology was developed in the thesis for damage prediction of welded aluminum thin-walled structures, which includes material modeling, calibration, numerical simulation and experimental verification. ...

Zheng, Li, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

404

Cell Voltage Noise Reduction Based on Wavelet in Aluminum ...  

Science Conference Proceedings (OSTI)

Presentation Title, Cell Voltage Noise Reduction Based on Wavelet in Aluminum ... cell voltage signals collected in aluminium electrolysis process are with high ...

405

Dynamic Simulation of Cell Voltage Resonance Effect in Aluminum ...  

Science Conference Proceedings (OSTI)

Dubal Cell Voltage Drop Initiatives towards Low Energy High Amperage Cells · Dynamic Simulation of Cell Voltage Resonance Effect in Aluminum Electrolysis ...

406

Aluminum nitrate recrystallization and recovery from liquid extraction raffinates  

SciTech Connect

The solid sludges resulting form biodenitrification of discarded aluminum nitrate are the largest Y-12 Plant process solid waste. Aluminum nitrate feedstocks also represent a major plant materials cost. The chemical constraints on aluminum nitrate recycle were investigated to determine the feasibility of increasing recycle while maintaining acceptable aluminum nitrate purity. Reported phase behavior of analogous systems, together with bench research, indicated that it would be possible to raise the recycle rate from 35% to between 70 and 90% by successive concentration and recrystallization of the mother liquor. A full scale pilot test successfully confirmed the ability to obtain 70% recycle in existing process equipment.

Griffith, W.L.; Compere, A.L.; Googin, J.M.; Huxtable, W.P.

1991-09-01T23:59:59.000Z

407

Fabrication of Carbon Nano-Fiber / Aluminum Composites by Low ...  

Science Conference Proceedings (OSTI)

In this study, the fabrication of carbon containing aluminum composites was attempted by using low-pressure infiltration method. At first, porous perform ...

408

Low Cost Video Emissions Monitoring Technique for Aluminum ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Aluminum smelting plants emit gaseous and particulate fluoride, sulfur dioxide (SO2), carbon oxides (CO and CO2), perfluorocarbons CF4 and ...

409

Energy Efficient Operation of Secondary Aluminum Melting Furnaces  

Science Conference Proceedings (OSTI)

Jun 1, 2007 ... Energy Efficient Operation of Secondary Aluminum Melting Furnaces by P.E. King, J.J. Hatem, and B.M. Golchert ...

410

MATHEMATICAL MODELING OF THE LITHIUM-ALUMINUM, IRON SULFIDE BATTERY  

E-Print Network (OSTI)

and J. Newman, Proc. Syrup. Battery Design and Optimization,123, 1364 (1976). Symp, Battery Design and Optimization, S.~ALUMINUM, IRON SULFIDE BATTERY Contents ACKNOWLEDGEMENTS

Pollard, Richard

2012-01-01T23:59:59.000Z

411

Localized corrosion of aluminum alloys for OTEC heat exchangers  

DOE Green Energy (OSTI)

The effects of dissolved oxygen, pH and temperature on the rate of initiation and growth of pitting and crevice corrosion of aluminum alloy 5052 and pure aluminum have been determined. Variations in pH and temperature rather than dissolved oxygen are shown to account for increased corrosion rates of 5000 series aluminum alloys that have been reported for deep ocean exposures. The impact of these results on the use of aluminum for OTEC heat exchanger tubing and on possible approaches to corrosion control are discussed.

Dexter, S C

1979-01-01T23:59:59.000Z

412

Aluminum Recycling in a Carbon Constrained World: Observations ...  

Science Conference Proceedings (OSTI)

Feb 15, 2010 ... per kg of primary aluminum production ( 35 million tonnes ) ... Excessive Product Differentiation Leads to Waste /Cost /Higher. Carbon ...

413

Carbon Fiber with Ni-Coated Reinforced Aluminum Alloy Matrix ...  

Science Conference Proceedings (OSTI)

May 1, 2007 ... Carbon Fiber with Ni-Coated Reinforced Aluminum Alloy Matrix Composites by Bianhua Han, Tianjiao Luo, Chunlin Liang,Guangchun Yao, ...

414

Effect of Dopants on Interdiffusion of Aluminum and Oxygen through ...  

Science Conference Proceedings (OSTI)

In this study, the mutual GB transport of aluminum and oxygen in RE-doped polycrystalline ... Secondary Transport Phenomena in Ceramic Membranes under ...

415

Aluminum-doped Zinc Oxide Nanoink - Energy Innovation Portal  

Scientists at Berkeley Lab have developed a method for fabricating conductive aluminum-doped zinc oxide (AZO) nanocrystals that provide a lower cost, less toxic ...

416

TMS2013 Keynote Session Looks at Impurities in the Aluminum ...  

Science Conference Proceedings (OSTI)

"Impacts of Impurities Introduced into the Aluminum Reduction Cell"; "Changes in Global Oil Refining and Its Impact on Anode Quality Petroleum Coke"

417

A New Vacuum Degassing Process for Molten Aluminum  

Science Conference Proceedings (OSTI)

In order to maintain a low hydrogen content in molten aluminum, A porous refractory ... Metallurgical Performance of Salt and Chlorine Fluxing Technologies in ...

418

Study on Aluminum Foam with Fly Ash Increase Viscosity  

Science Conference Proceedings (OSTI)

May 1, 2007 ... Study on Aluminum Foam with Fly Ash Increase Viscosity by Yong Wang, Guang- chun Yao, and Bing Li. Publisher: TMS. Product Format: PDF.

419

Heat Recovery from the Exhaust Gas of Aluminum Reduction Cells  

Science Conference Proceedings (OSTI)

Increased Energy Efficiency and Reduced HF Emissions with New Heat Exchanger · Industrial Test of Low-voltage Energy-saving Aluminum Reduction ...

420

The ALCAN Compact Degasser: A through-Based Aluminum ...  

Science Conference Proceedings (OSTI)

Sep 1, 1996 ... The ALCAN Compact Degasser: A through-Based Aluminum Treatment Process. Part I: Metallurgical Principles and Performance by P. Waite ...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

TMS to Install Hydro Aluminum's Wolfgang Schneider as 2012 ...  

Science Conference Proceedings (OSTI)

Schneider is the head of the research and development center of Hydro Aluminum Rolled Products Business in Bonn, Germany and is also a professor of  ...

422

Aluminum across the Americas: Caribbean Mobilities and Transnational American Studies  

E-Print Network (OSTI)

zinc, bauxite, and the hydroelectric power needed to smeltto stop the building of a hydroelectric project by the majorbuild the Afobaka hydroelectric dam to power an aluminum

Sheller, Mimi

2013-01-01T23:59:59.000Z

423

Aluminum Oxynitride Dielectrics for High Energy Density Capacitor ...  

Science Conference Proceedings (OSTI)

Oct 15, 2006 ... Aluminum Oxynitride Dielectrics for High Energy Density Capacitor Applications by Kevin R. Bray, Richard L.C. Wu, Sandra Fries-Carr, and ...

424

Hybrid Aluminum-Lithium Ion Battery having Enhanced Power Density  

Hybrid Aluminum-Lithium Ion Battery having Enhanced Power Density Note: The technology described above is an early stage opportunity. Licensing rights to this ...

425

Life Cycle Inventory Report for the North American Aluminum ... - TMS  

Science Conference Proceedings (OSTI)

Jun 30, 2008 ... This document provides the most comprehensive life-cycle information for the North American aluminum industry. Carried out for the calendar ...

426

Aluminum-stabilized Nb/sub 3/Sn superconductor  

DOE Patents (OSTI)

This patent discloses an aluminum-stabilized Nb/sub 3/Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor is heated to convert it to the brittle Nb/sub 3/Sn superconductor phase, using a temperature high enough to perform the transformation but still below the melting point of the aluminum. This results in reaction of substantially all of the niobium, while providing stabilization and react-in-place features which are beneficial in the fabrication of magnets utilizing superconducting materials.

Scanlan, R.M.

1984-02-10T23:59:59.000Z

427

Anodization of Aluminum-Titanium Alloys for Solar Cell Applications  

Science Conference Proceedings (OSTI)

Presentation Title, Anodization of Aluminum-Titanium Alloys for Solar Cell ... Migration of Nanotechnology from Laboratory to Market Place: Arci Experience.

428

The GHG Emissions List Analysis of Aluminum Industry in China  

Science Conference Proceedings (OSTI)

Presentation Title, The GHG Emissions List Analysis of Aluminum Industry in China. Author(s), Yuanyuan Wang, Hao Bai, Guangwei Du, Yuhao Ding, Kang ...

429

Compression Behavior and Energy Absorption of Aluminum Alloys ...  

Science Conference Proceedings (OSTI)

Presentation Title, Compression Behavior and Energy Absorption of ... Abstract Scope, The usage of advanced high strength steels and Aluminum Alloys as ...

430

Study on Compressive Properties of Aluminum Foams Reinforced ...  

Science Conference Proceedings (OSTI)

On Closed-Cell Aluminum Foam Used as Train Floor and Side Plate ... Piezoelectric Smart Composites: Electromechanical Properties and Design Maps

431

Fabrication of Carbon Nano-Fiber (CNF) Reinforced Aluminum ...  

Science Conference Proceedings (OSTI)

On Closed-Cell Aluminum Foam Used as Train Floor and Side Plate ... Piezoelectric Smart Composites: Electromechanical Properties and Design Maps

432

Effect of Heat Treatment on the Compressive Property of Aluminum ...  

Science Conference Proceedings (OSTI)

On Closed-Cell Aluminum Foam Used as Train Floor and Side Plate ... Piezoelectric Smart Composites: Electromechanical Properties and Design Maps

433

Aluminum-stabilized Nb[sub 3]Sn superconductor  

DOE Patents (OSTI)

Disclosed are an aluminum-stabilized Nb[sub 3]Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor is heated to convert it to the brittle Nb[sub 3]Sn superconductor phase, using a temperature high enough to perform the transformation but still below the melting point of the aluminum. This results in reaction of substantially all of the niobium, while providing stabilization and react-in-place features which are beneficial in the fabrication of magnets utilizing superconducting materials. 4 figs.

Scanlan, R.M.

1988-05-10T23:59:59.000Z

434

Processing of Aluminum Wires and Its Effect on Their Electrical ...  

Science Conference Proceedings (OSTI)

The treated specimens were mechanically tested and their electrical resistivity was measured and compared with pure aluminum wires. The highest electrical ...

435

A-15: Combustion of Aluminum Powder Compacts due to Dynamic ...  

Science Conference Proceedings (OSTI)

The goal is to determine the meso-scale mechanisms of combustion of aluminum ... of High Nitrogen Duplex Stainless Steel by Multiscale in-situ Experiments.

436

Vacuum Distillation of Aluminum and Silicon via Carbothermal ...  

Science Conference Proceedings (OSTI)

Presentation Title, Vacuum Distillation of Aluminum and Silicon via Carbothermal Reduction of Their Oxides with Concentrated Solar Energy. Author(s), Peter G.

437

Method of bonding metals to ceramics and other materials  

DOE Patents (OSTI)

A composite and method of forming same wherein the composite has a non-metallic portion and an alloy portion wherein the alloy comprises an alkali metal and a metal which is an electrical conductor such as Cu, Ag, Al, Sn or Au and forms an alloy with the alkali metal. A cable of superconductors and composite is also disclosed.

Gruen, D.M.; Krauss, A.R.; DeWald, A.P.; Chienping Ju; Rigsbee, J.M.

1993-01-05T23:59:59.000Z

438

ALS Chemistry Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Chemistry Lab Print ALS Chemistry Labs The ALS Chemistry Labs are located in the User Support Building (15-130) and in Building 6 (6-2233)*. These spaces are dedicated for...

439

ALS superbend magnet system  

E-Print Network (OSTI)

ALS Superbend Magnet System J. Zbasnik † , S. T. Wang †† ,of a High-Field Magnet for the ALS,” Transactions AppliedRefrigeration options for the ALS Superbend dipole magnets”,

2000-01-01T23:59:59.000Z

440

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Gate Access Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register...

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

ALS Longitudinal Kicker  

E-Print Network (OSTI)

be published in the Proceedings ALS Longitudinal Kickers F.IJ3Ir-33088 lE93 005961 ALS Longitudinul Kickers* F. VoelkerContract No. DE-AC03-76SFOOO98. ALS LONGITUDINAL KICKERS F.

Voelkner, F.

2011-01-01T23:59:59.000Z

442

ALS superbend magnet performance  

E-Print Network (OSTI)

ALS Superbend Magnet Performance S. Marks, J. Zbasnik, W.the Advanced Light Source (ALS), with the fourth magnet as ahe Advanced Light Source (ALS) at the Lawrence Berkeley

2001-01-01T23:59:59.000Z

443

Load partitioning in honycomb-like silicon carbide aluminum alloy composites.  

DOE Green Energy (OSTI)

A 50/50 vol.% Al/SiC composite was made via melt infiltration of an aluminum alloy into a porous beech wood-derived SiC preform. The honeycomb-like composite microstructure consisted of an interconnected SiC phase surrounding discrete Al 'fibers' aligned in the growth direction of the beech wood. High energy synchrotron X-ray diffraction was used to measure the volume averaged lattice strains in both the SiC and Al phases during in situ compressive loading up to an applied stress of -530MPa. Load transfer from the Al to the SiC was observed, and the Al yielded at an applied stress of above -213MPa. The elastic behavior of the composite was modeled with both an isostrain rule of mixtures calculation and variational bounds for the effective elastic modulus. Furthermore, calculations of the von Mises effective stress of the SiC and Al phases showed that the wood-derived SiC was a more effective reinforcement than either SiC particle- or whisker-reinforced composites.

Wikes, T. E.; Harder, B. J.; Almer, J. D.; Faber, K. T.; Northwestern Univ.

2009-01-01T23:59:59.000Z

444

Fatigue-crack propagation in aluminum-lithium alloys processed by power and ingot metallurgy  

Science Conference Proceedings (OSTI)

Fatigue-crack propagation behavior in powder-metallurgy (P/M) aluminum-lithium alloys, namely, mechanically-alloyed (MA) Al-4.0Mg-1.5Li-1.1C-0.80{sub 2} (Inco 905-XL) and rapid-solidification-processed (RSP) Al-2.6Li-1.0Cu-0.5Mg-0.5Zr (Allied 644-B) extrusions, has been studied, and results compared with data on an equivalent ingot-metallurgy (I/M) Al-Li alloy, 2090-T81 plate. Fatigue-crack growth resistance of the RSP Al-Li alloy is found to be comparable to the I/M Al-Li alloy; in contrast, crack velocities in MA 905-XL extrusions are nearly three orders of magnitude faster. Growth-rate response in both P/M Al-Li alloys, however, is high anisotropic. Results are interpreted in terms of the microstructural influence of strengthening mechanism, slip mode, grain morphology and texture on the development of crack-tip shielding from crack-path deflection and crack closure. 14 refs., 7 figs., 2 tabs.

Venkateswara Rao, K.T.; Ritchie, R.O. (Lawrence Berkeley Lab., CA (United States)); Kim, N.J. (Pohang Inst. of Science and Technology (Korea, Republic of)); Pizzo, P.P. (San Jose State Univ., CA (United States))

1990-04-01T23:59:59.000Z

445

Transfer printing of patterned metal films using parylene C coated surfaces  

Science Conference Proceedings (OSTI)

Successful transfer printing of aluminum (Al), copper (Cu), silver (Ag), nickel (Ni) and gold (Au) films is demonstrated. Previously, Al, Cu, Ag, and Ni films have exhibited relatively strong adhesion to silicon (Si) substrates resulting in poor transfer ... Keywords: Flexible electronics, Surface treatments, Transfer printing

J. Bavier; J. Cumings; D. R. Hines

2013-04-01T23:59:59.000Z

446

2012 ALS User Meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

2012 ALS User Meeting 2012 ALS User Meeting Print Tuesday, 14 June 2011 12:37 user meeting web banner Home Agenda Awards Exhibitors Lodging Posters Registration Transportation...

447

Al,N  

Science Conference Proceedings (OSTI)

Presentation Title, Significantly Bandgap-reduced and Enhanced PEC Response of Al and N Co-doped ZnO:(Al,N) Films for Solar Driven Hydrogen Production.

448

ALS Users' Association Charter  

NLE Websites -- All DOE Office Websites (Extended Search)

organized framework for the interaction between those who use the Advanced Light Source (ALS) at the Lawrence Berkeley Laboratory (LBL) for their research and the ALS management,...

449

ALS Beamlines Directory  

NLE Websites -- All DOE Office Websites (Extended Search)

Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline...

450

ALUMINUM HYDRIDE: A REVERSIBLE MATERIAL FOR HYDROGEN STORAGE  

DOE Green Energy (OSTI)

Hydrogen storage is one of the challenges to be overcome for implementing the ever sought hydrogen economy. Here we report a novel cycle to reversibly form high density hydrogen storage materials such as aluminium hydride. Aluminium hydride (AlH{sub 3}, alane) has a hydrogen storage capacity of 10.1 wt% H{sub 2}, 149 kg H{sub 2}/m{sup 3} volumetric density and can be discharged at low temperatures (< 100 C). However, alane has been precluded from use in hydrogen storage systems because of the lack of practical regeneration methods. The direct hydrogenation of aluminium to form AlH{sub 3} requires over 10{sup 5} bars of hydrogen pressure at room temperature and there are no cost effective synthetic means. Here we show an unprecedented reversible cycle to form alane electrochemically, using alkali metal alanates (e.g. NaAlH{sub 4}, LiAlH{sub 4}) in aprotic solvents. To complete the cycle, the starting alanates can be regenerated by direct hydrogenation of the dehydrided alane and the alkali hydride being the other compound formed in the electrochemical cell. The process of forming NaAlH{sub 4} from NaH and Al is well established in both solid state and solution reactions. The use of adducting Lewis bases is an essential part of this cycle, in the isolation of alane from the mixtures of the electrochemical cell. Alane is isolated as the triethylamine (TEA) adduct and converted to pure, unsolvated alane by heating under vacuum.

Zidan, R; Christopher Fewox, C; Brenda Garcia-Diaz, B; Joshua Gray, J

2009-01-09T23:59:59.000Z

451

Disposal criticality analysis for aluminum-based DOE fuels  

SciTech Connect

This paper describes the disposal criticality analysis for canisters containing aluminum-based Department of Energy fuels from research reactors. Different canisters were designed for disposal of highly enriched uranium (HEU) and medium enriched uranium (MEU) fuel. In addition to the standard criticality concerns in storage and transportation, such as flooding, the disposal criticality analysis must consider the degradation of the fuel and components within the waste package. Massachusetts Institute of Technology (MIT) U-Al fuel with 93.5% enriched uranium and Oak Ridge Research Reactor (ORR) U-Si-Al fuel with 21% enriched uranium are representative of the HEU and MEU fuel inventories, respectively. Conceptual canister designs with 64 MIT assemblies (16/layer, 4 layers) or 40 ORR assemblies (10/layer, 4 layers) were developed for these fuel types. Borated stainless steel plates were incorporated into a stainless steel internal basket structure within a 439 mm OD, 15 mm thick XM-19 canister shell. The Codisposal waste package contains 5 HLW canisters (represented by 5 Defense Waste Processing Facility canisters from the Savannah River Site) with the fuel canister placed in the center. It is concluded that without the presence of a fairly insoluble neutron absorber, the long-term action of infiltrating water can lead to a small, but significant, probability of criticality for both the HEU and MEU fuels. The use of 1.5kg of Gd distributed throughout the MIT fuel and the use of carbon steels for the structural basket or 1.1 kg of Gd distributed in the ORR fuel will reduce the probability of criticality to virtually zero for both fuels.

Davis, J.W. [Framatome Cogema Fuels, Las Vegas, NV (United States); Gottlieb, P. [TRW Environmental Safety Systems, Inc., Las Vegas, NV (United States)

1997-11-01T23:59:59.000Z

452

Design of an Aluminum Proton Beam Window for the Spallation Neutron Source  

Science Conference Proceedings (OSTI)

An aluminum proton beam window design is being considered at the Spallation Neutron Source primarily to increase the lifetime of the window, with secondary advantages of higher beam transport efficiency and lower activation. The window separates the core vessel, the location of the mercury target, from the vacuum of the accelerator, while withstanding the pass through of a proton beam of up to 2 MW with 1.0 GeV proton energy. The current aluminum alloy being investigated for the window material is 6061-T651 due to its combination of high strength, high thermal conductivity, and good resistance to aqueous corrosion, as well as demonstrated dependability in previous high-radiation environments. The window design will feature a thin plate with closely spaced cross drilled cooling holes. An analytical approach was used to optimize the dimensions of the window before finite element analysis was used to simulate temperature profiles and stress fields resulting from thermal and static pressure loading. The resulting maximum temperature of 60 C and Von Mises stress of 71 MPa are very low compared to allowables for Al 6061-T651. A significant challenge in designing an aluminum proton beam window for SNS is integrating the window with the current 316L SS shield blocks. Explosion bonding was chosen as a joining technique because of the large bonding area required. A test program has commenced to prove explosion bonding can produce a robust vacuum joint. Pending successful explosion bond testing, the aluminum proton beam window design will be proven acceptable for service in the Spallation Neutron Source.

Janney, Jim G [ORNL; McClintock, David A [ORNL

2012-01-01T23:59:59.000Z

453

SEGREGATION IN URANIUM-ALUMINUM ALLOYS AND ITS EFFECT ON THE FUEL LOADING OF ALUMINUM-BASE FUEL ELEMENTS  

SciTech Connect

Techniques were devised for quantitatively determining the accuracy of potentiometric uranium analyses in uranium-aluminum alloys containing up to 55 wt. % U and for evaluatin; the segregation existing in uraniumaluminum alloys containing as low as 7 wt. % U and as high as 50 wt. % U. A theory for predicting the mode of uranium segrcgation in these alloys was postulated. On the basis of the observed uranium segregation, the uranium content of a hypothetical fuel element was predicted by means of several sampling schemes. Dip sampling of the melt was demonstrated to be satisfactory for alloys containing 7 to 19 wt. % U. However, this technique was not considered suitable for alloys containiog 40 to 50 wt. % U, because a significant number of samples is required from the casting or the wrought alloy to adequately represent the fuel content. (auth) An accurate and rapid method for the volumetric determination of uranium has been developed for the ranges 0.3% to 90% uranium. The existing mercury cathode deposition equipment has been modified for the rapid removal of metallic impurities and for the electrolytic reduction of the uranium. (auth)

Thurber, W.C.; Beaver, R.J.

1958-09-19T23:59:59.000Z

454

Procedures for the Examination of the Metals Used in Electrical Power Cables  

Science Conference Proceedings (OSTI)

This report provides detailed procedures for the examination of the metallic components in paper-insulated nonpressurized electrical power cables. The scope includes lead and lead alloy sheaths, splices and repair sleeves, plumbed wipes, and both copper and aluminum stranded and solid aluminum conductors. Examination of these components is usually required following equipment failure or breakdown due to faults developing from defective, incorrect, or adverse manufacturing, installation, or service condit...

2004-12-15T23:59:59.000Z

455

Development of Cost-Effective Low-Permeability Ceramic and Refractory Components for Aluminum Melting and Casting  

DOE Green Energy (OSTI)

A recent review by the U.S. Advanced Ceramics Association, the Aluminum Association, and the U.S. Department of Energy's Office of Industrial Technologies (DOE/OIT) described the status of advanced ceramics for aluminum processing, including monolithics, composites, and coatings. The report observed that monolithic ceramics (particularly oxides) have attractive properties such as resistance to heat, corrosion, thermal shock, abrasion, and erosion [1]. However, even after the developments of the past 25 years, there are two key barriers to commercialization: reliability and cost-effectiveness. Industry research is therefore focused on eliminating these barriers. Ceramic coatings have likewise undergone significant development and a variety of processes have been demonstrated for applying coatings to substrates. Some processes, such as thermal barrier coatings for gas turbine engines, exhibit sufficient reliability and service life for routine commercial use. Worldwide, aluminum melting and molten metal handling consumes about 506,000 tons of refractory materials annually. Refractory compositions for handling molten aluminum are generally based on dense fused cast silica or mullite. The microstructural texture is extremely important because an interlocking mass of coarser grains must be bonded together by smaller grains in order to achieve adequate strength. At the same time, well-distributed microscopic pores and cracks are needed to deflect cracks and prevent spalling and thermal shock damage [2]. The focus of this project was to develop and validate new classes of cost-effective, low-permeability ceramic and refractory components for handling molten aluminum in both smelting and casting environments. The primary goal was to develop improved coatings and functionally graded materials that will possess superior combinations of properties, including resistance to thermal shock, erosion, corrosion, and wetting. When these materials are successfully deployed in aluminum smelting and casting operations, their superior performance and durability will give end users marked improvements in uptime, defect reduction, scrap/rework costs, and overall energy savings resulting from higher productivity and yield. The implementation of results of this program will result in energy savings of 30 trillion Btu/year by 2020. For this Industrial Materials for the Future (IMF) project, riser tube used in the low-pressure die (LPD) casting of aluminum was selected as the refractory component for improvement. In this LPD process, a pressurized system is used to transport aluminum metal through refractory tubes (riser tubes) into wheel molds. It is important for the tubes to remain airtight because otherwise, the pressurized system will fail. Generally, defects such as porosity in the tube or cracks generated by reaction of the tube material with molten aluminum lead to tube failure, making the tube incapable of maintaining the pressure difference required for normal casting operation. Therefore, the primary objective of the project was to develop a riser tube that is not only resistant to thermal shock, erosion, corrosion, and wetting, but is also less permeable, so as to achieve longer service life. Currently, the dense-fused silica (DFS) riser tube supplied by Pyrotek lasts for only 7 days before undergoing failure. The following approach was employed to achieve the goal: (1) Develop materials and methods for sealing surface porosity in thermal-shock-resistant ceramic refractories; (2) Develop new ceramic coatings for extreme service in molten aluminum operations, with particular emphasis on coatings based on highly stable oxide phases; (3) Develop new monolithic refractories designed for lower-permeability applications using controlled porosity gradients and particle size distributions; (4) Optimize refractory formulations to minimize wetting by molten aluminum, and characterize erosion, corrosion, and spallation rates under realistic service conditions; and (5) Scale up the processing methods to full-sized components and perform field testi

Kadolkar, Puja [ORNL; Ott, Ronald D [ORNL

2006-02-01T23:59:59.000Z

456

Lithium aluminum/iron sulfide battery having lithium aluminum and silicon as negative electrode  

SciTech Connect

A method of making a negative electrode, the electrode made thereby and a secondary electrochemical cell using the electrode. Silicon powder is mixed with powdered electroactive material, such as the lithium-aluminum eutectic, to provide an improved electrode and cell.

Gilbert, Marian (Flossmoor, IL); Kaun, Thomas D. (New Lenox, IL)

1984-01-01T23:59:59.000Z

457

Economic and environmental evaluation of end-of-life aerospace aluminum options using optimization methods  

E-Print Network (OSTI)

The benefits of recycling have long been understood and the conspicuous energy savings of secondary aluminum production have caused aluminum recycling to increase. Obsolete aircraft are a valuable source of aluminum scrap ...

Chen, Emily, S.B. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

458

Fabrication and corrosion resistance of superhydrophobic hydroxide zinc carbonate film on aluminum substrates  

Science Conference Proceedings (OSTI)

Superhydrophobic hydroxide zinc carbonate (HZC) films were fabricated on aluminum substrate through a convenient in situ deposition process. Firstly, HZC films with different morphologies were deposited on aluminum substrates through immersing the aluminum ...

Jin Liang, Yunchu Hu, Yiqiang Wu, Hong Chen

2013-01-01T23:59:59.000Z

459

Amorphous Aluminum Alloys—Synthesis and Stability  

Science Conference Proceedings (OSTI)

Recent innovations in metallic glasses have led to new alloy classes that may be vitrified and a re-examination of the key alloying factors influencing glass ...

460

Recipients: 2006 TMS Aluminum Distinguished Service Award  

Science Conference Proceedings (OSTI)

STAFF DIRECTORY ... activities has clearly facilitated the Society's capability to serve its light metals-oriented members and their supporting organizations.

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Aluminum Exhibits Its Versatility in Art, Life  

Science Conference Proceedings (OSTI)

At $32,000, the set commands a respectable price for metal that probably was ... Bailey learned about wiring and electricity by dissecting those parts and now ...

462

Ignition Characteristics of Aluminum-Nickel Heterostructures ...  

Science Conference Proceedings (OSTI)

Novel Forming Techniques in Fabrication of Powder-based Metals via Current Activated Tip-Based Sintering (CATS) · Particle Size Distribution of Natural ...

463

Magnesium Removal from Secondary Aluminum Melts in ...  

Science Conference Proceedings (OSTI)

Recovery of Precious Metals from Chloride Media Using Microalgae Waste from Biofuel Extraction · Segregation Roasting of a Saprolitic Laterite Ore: An ...

464

NEW ALUMINUM OXIDE HUMIDITY ELEMENT. Second Report  

SciTech Connect

An aluminum oxide humidity sensing element is discussed. These elements, which were developed primarily for use in radiosonde weather measuring equipmeni, have a fast response over the entire humidity range and through a broad temperature range of -80 deg F to +l35 deg F. The elements are a marked improvement over previous humidity sensing devices, and their use in specially designed testers allows measurements to be made which were previously unobtainable. Among their other desirable features, these elements are small and lightweight, can be made inexpensively of readily available materials, and can be mass produced. (auth)

Stover, C.M.

1962-03-01T23:59:59.000Z

465

Gelcasting of aluminum titanate. Final report  

SciTech Connect

This Cooperative Research and Development Agreement (CRADA) was undertaken to assess the applicability of the gelcasting process for forming automotive exhaust port liner green bodies using Golden Technologies` proprietary aluminum titanate powder composition. A gelcasting process, specifically tailored to Golden Technologies` powder, was developed and used successfully to form green bodies for property evaluation. Using appropriate milling and firing conditions, it was found that the gelcast material had properties which compared favorably with Golden Technologies` baseline material. Tubular gelcast samples simulating exhaust port liners were prepared and shipped to Golden Technologies for final process evaluation.

Nunn, S.D.; Stephan, J.E.

1997-08-01T23:59:59.000Z

466

First-Principles Study of Point Defects in LaAlO?  

E-Print Network (OSTI)

In this study, the native point defects including oxygen vacancy and interstitial, metal (La, Al) vacancy and interstitial, and metal antisite in perovskite LAO are studied. Defect formation energies are studied as a ...

Zheng, J.X.

467

Wear debris characterization of Al-Si alloys sliding against steel under dry wear conditions  

SciTech Connect

The present work has characterized the debris generated during the dry sliding wear of Al-Si alloys sliding against M2 steel and has shown the formation of an intermetallic iron-aluminum compound in the wear debris of the Al-Si alloy using XRD analyses. It has also been shown that iron and/or more silicon dissolved into the {alpha}-Al as the lattice parameter of the {alpha}-Al decreased as the sliding load was increased. It is therefore suggested that the surface layer from which the debris was generated contained the intermetallic compound. The formation of the intermetallics has also been confirmed in the sliding wear of the high purity aluminum in an inert atmosphere.

Tandon, K.N.; Li, X.Y. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)

1997-12-18T23:59:59.000Z

468

Light Metals  

Science Conference Proceedings (OSTI)

Alternative processes; Anode design and operation; Cell fundamentals and ... Hot-rolling technologies; Deformation of materials; Primary metal production.

469

ALS Ceramics Materials Research Advances Engine Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Ceramics Materials Research ALS Ceramics Materials Research Advances Engine Performance ALS Ceramics Materials Research Advances Engine Performance Print Thursday, 27 September 2012 00:00 ritchie ceramics This 3D image of a ceramic composite specimen imaged under load at 1750C shows the detailed fracture patterns that researchers are able to view using ALS Beamline 8.3.2. The vertical white lines are the individual silicon carbide fibers in this sample about 500 microns in diameter. LBNL senior materials scientist and U.C. Berkeley professor Rob Ritchie has been researching the fracture behavior of a wide array of materials for the past 40 years, the last ten of them using the facilities at the ALS. From human bone to synthetic engineering materials such as shape-memory metals

470

ALS Ceramics Materials Research Advances Engine Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Ceramics Materials Research ALS Ceramics Materials Research Advances Engine Performance ALS Ceramics Materials Research Advances Engine Performance Print Thursday, 27 September 2012 00:00 ritchie ceramics This 3D image of a ceramic composite specimen imaged under load at 1750C shows the detailed fracture patterns that researchers are able to view using ALS Beamline 8.3.2. The vertical white lines are the individual silicon carbide fibers in this sample about 500 microns in diameter. LBNL senior materials scientist and U.C. Berkeley professor Rob Ritchie has been researching the fracture behavior of a wide array of materials for the past 40 years, the last ten of them using the facilities at the ALS. From human bone to synthetic engineering materials such as shape-memory metals

471

REPORT ON QUALITATIVE VALIDATION EXPERIMENTS USING LITHIUM-ALUMINUM LAYERED DOUBLE-HYDROXIDES FOR THE REDUCTION OF ALUMINUM FROM THE WASTE TREATMENT PLANT FEEDSTOCK  

SciTech Connect

A process for removing aluminum from tank waste simulants by adding lithium and precipitating Li-Al-dihydroxide (Lithiumhydrotalcite, [LiAl{sub 2}(OH){sub 6}]{sup +}X{sup -}) has been verified. The tests involved a double-shell tank (DST) simulant and a single-shell tank (SST) simulant. In the case of the DST simulant, the product was the anticipated Li-hydrotalcite. For the SST simulant, the product formed was primarily Li-phosphate. However, adding excess Li to the solution did result in the formation of traces of Li-hydrotalcite. The Li-hydrotalcite from the DST supernate was an easily filterable solid. After four water washes the filter cake was a fluffy white material made of < 100 {micro}m particles made of smaller spheres. These spheres are agglomerates of {approx} 5 {micro}m diameter platelets with < 1 {micro}m thickness. Chemical and mineralogical analyses of the filtrate, filter cake, and wash waters indicate a removal of 90+ wt% of the dissolved Al for the DST simulant. For the SST simulant, the main competing reaction to the formation of lithium hydrotalcite appears to be the formation of lithium phosphate. In case of the DST simulant, phosphorus co-precipitated with the hydrotalcite. This would imply the added benefit of the removal of phosphorus along with aluminum in the pre-treatment part of the waste treatment and immobilization plant (WTP). For this endeavor to be successful, a serious effort toward process parameter optimization is necessary. Among the major issues to be addressed are the dependency of the reaction yield on the solution chemistry, as well as residence times, temperatures, and an understanding of particle growth.

HUBER HJ; DUNCAN JB; COOKE GA

2010-05-11T23:59:59.000Z

472

ALUMINUM REMOVAL FROM HANFORD WASTE BY LITHIUM HYDROTALCITE PRECIPITATION - LABORATORY SCALE VALIDATION ON WASTE SIMULANTS TEST REPORT  

SciTech Connect

To reduce the additional sodium hydroxide and ease processing of aluminum bearing sludge, the lithium hydrotalcite (LiHT) process has been invented by AREV A and demonstrated on a laboratory scale to remove alumina and regenerate/recycle sodium hydroxide prior to processing in the WTP. The method uses lithium hydroxide (LiOH) to precipitate sodium aluminate (NaAI(OH){sub 4}) as lithium hydrotalcite (Li{sub 2}CO{sub 3}.4Al(OH){sub 3}.3H{sub 2}O) while generating sodium hydroxide (NaOH). In addition, phosphate substitutes in the reaction to a high degree, also as a filterable solid. The sodium hydroxide enriched leachate is depleted in aluminum and phosphate, and is recycled to double-shell tanks (DSTs) to leach aluminum bearing sludges. This method eliminates importing sodium hydroxide to leach alumina sludge and eliminates a large fraction of the total sludge mass to be treated by the WTP. Plugging of process equipment is reduced by removal of both aluminum and phosphate in the tank wastes. Laboratory tests were conducted to verify the efficacy of the process and confirm the results of previous tests. These tests used both single-shell tank (SST) and DST simulants.

SAMS T; HAGERTY K

2011-01-27T23:59:59.000Z

473

Processing and Brazing Behavior of Three Layer Al-Si/Al-Mn/Al-Si ...  

Science Conference Proceedings (OSTI)

Among them, automotive aluminum condensers are generally produced by ... The brazing sheet used for the condenser is a three-layer composite sheet and ...

474

TransForum v3n1 - Aluminum-Intensive Vehicles  

NLE Websites -- All DOE Office Websites (Extended Search)

ARGONNE PREDICTS BENEFITS OF ALUMINUM-INTENSIVE VEHICLES Aluminum Car Frame At the Paris Exposition of 1855, as part of the rich and varied displays of France's evolving...

475

Characteristics of Aluminum Biosorption by Sargassum fluitans Biomass  

E-Print Network (OSTI)

Characteristics of Aluminum Biosorption by Sargassum fluitans Biomass Hak Sung Lee1, * and Bohumil3A 2B2, Canada Abstract: Biomass of nonliving brown seaweed Sargassum fluitans pretreated.5. There are indications that the biomass hydroxyl groups were involved in sequestering the aluminum in the form

Volesky, Bohumil

476

POST-SHOCK TEMPERATURE MEASUREMENTS OF ALUMINUM A. Seifter1  

E-Print Network (OSTI)

POST-SHOCK TEMPERATURE MEASUREMENTS OF ALUMINUM A. Seifter1 , S. T. Stewart2 , M. R. Furlanetto1, Harvard University, 20 Oxford Street, Cambridge MA 02138 Abstract. Post-shock temperature is an important experiments. Keywords: Pyrometry, infrared optics, post-shock temperatures, aluminum, equations of state PACS

Stewart, Sarah T.

477

26Al in the Early Solar System: Not so Unusual After All  

E-Print Network (OSTI)

Recently acquired evidence shows that extrasolar asteroids exhibit over a factor of 100 variation in the iron to aluminum abundance ratio. This large range likely is a consequence of igneous differentiation that resulted from heating produced by radioactive decay of 26Al with an abundance comparable to that in the solar system's protoplanetary disk at birth. If so, the conventional view that our solar system began with an unusually high amount of 26Al should be discarded.

Jura, M; Young, E D

2013-01-01T23:59:59.000Z

478

High-performance batteries for stationary energy storage and electric-vehicle propulsion. Progress report, January--March 1977. [Li--Al/LiCl--KCl/FeS or FeS/sub 2/  

SciTech Connect

Research, development, and management activities of the program at Argonne National Laboratory (ANL) on lithium--aluminum/metal sulfide batteries during January to March 1977 are described. The present cells, which operate at 400 to 450/sup 0/C, are of a vertically oriented, prismatic design with a central positive electrode of FeS or FeS/sub 2/, two facing negative electrodes of lithium--aluminum alloy, and an electrolyte of molten LiCl--KCl. A major objective of this program is to transfer the technology to industry. Testing and evaluation of industrially fabricated cells is continuing. During this period, Li--Al/FeS and Li--Al/FeS/sub 2/ cells were tested. These tests provide information on the effects of design modification and alternative materials for cells. Improved electrode and cell designs are being developed and tested. The materials development efforts include the development of a new, lightweight electrical feedthrough; studies of various current-collector designs; investigation of Y/sub 2/O/sub 3/ powder as separator material; wettability tests of materials for cell components; and postoperative examinations of cells. The cell chemistry studies were concerned with discharge mechanisms of FeS electrodes, with the mechanism of loss of sulfur and iron from FeS/sub 2/ electrodes, and with other transition-metal sulfides as positive electrode materials. The advanced battery effort investigated the use of calcium alloys for the negative electrode and the use of an iron current collector in the positive electrode. 19 figures, 16 tables.

Nelson, P A; Yao, N P; Steunenberg, R K; Chilenskas, A A; Gay, E C; Battles, J E; Hornstra, F; Miller, W E; Roche, M F; Smimotake, H

1977-06-01T23:59:59.000Z

479

Superconducting structure with layers of niobium nitride and aluminum nitride  

DOE Patents (OSTI)

A superconducting structure is formed by depositing alternate layers of aluminum nitride and niobium nitride on a substrate. Deposition methods include dc magnetron reactive sputtering, rf magnetron reactive sputtering, thin-film diffusion, chemical vapor deposition, and ion-beam deposition. Structures have been built with layers of niobium nitride and aluminum nitride having thicknesses in a range of 20 to 350 Angstroms. Best results have been achieved with films of niobium nitride deposited to a thickness of approximately 70 Angstroms and aluminum nitride deposited to a thickness of approximately 20 Angstroms. Such films of niobium nitride separated by a single layer of aluminum nitride are useful in forming Josephson junctions. Structures of 30 or more alternating layers of niobium nitride and aluminum nitride are useful when deposited on fixed substrates or flexible strips to form bulk superconductors for carrying electric current. They are also adaptable as voltage-controlled microwave energy sources. 8 figs.

Murduck, J.M.; Lepetre, Y.J.; Schuller, I.K.; Ketterson, J.B.

1989-07-04T23:59:59.000Z

480

Benchmark calculations for the diluted highly enriched uranium (HEU) and aluminum experiment  

SciTech Connect

The HEU-Al experiment was performed using the Planet universal critical assembly at Los Alamos Critical Experiment Facility (LACEF) in Los Alamos National Laboratory. This experiment consisted of placing HEU foils interspersed with aluminum plates in a column stack. These uranium foils were moderated and reflected by polyethylene square plates. This experiment was performed to measure the prompt neutron decay constants in uranium systems diluted by matrix materials. This experimental set-up yielded a Al/235U ratio of 60:1.1 The experimental keff was 1.001 and the modeled MCNP keff was 1.0016{+-}0.0004. This report summarizes the benchmark calculations performed to validate the experiment. The experimental arrangement is depicted in Figure 1. As Figure 1 illustrates the stack is divided into two parts. The bottom half of the stack rest on an aluminum support plate which is 1 inch thick. The top half of the experiment rest on 0.75 inch thick polyethylene plate. Criticality is achieved by decreasing the gap between the top and bottom portions of the stack. To disassemble the configuration the bottom stack is dropped to its initial position. There are no other control or safety rods inside the assembly.

Loaiza, D. J. (David J.); Sanchez, R. G. (Rene G.)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metals aluminum al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

ALUMINUM HYDRIDE, A1H3, AS A HYDROGEN STORAGE COMPOUND.  

DOE Green Energy (OSTI)

Aluminum hydride is a covalent, binary hydride that has been known for more than 60 years and is an attractive medium for on-board automotive hydrogen storage, since it contains 10.1% by wt. hydrogen with a density of 1.48 g/ml. There are at least 7 non-solvated AlH{sub 3} phases, namely {alpha}, {alpha}{prime}, {beta}, {gamma}, {var_epsilon} and {zeta}. The properties of {alpha}-AlH{sub 3}, obtained from the Dow Chemical Co. in 1980, have been previously reported. Here we present a description of the thermodynamic and kinetic properties of freshly prepared {alpha}, {beta} and {gamma} phases of AlH{sub 3}. In all cases the decomposition kinetics are appreciable below 100 C and all will meet the DOE 2010 gravimetric and volumetric vehicular system targets (6 wt% H{sub 2} and 0.045 kg/L). However, further research will be required to develop an efficient and economical process to regenerate AlH{sub 3} from the spent Al powder.

GRAETZ, J.; REILLY, J.; SANDROCK, G.; JOHNSON, J.; ZHOU, W.M.; WEGRZYN, J.

2006-11-27T23:59:59.000Z

482

DISSOLUTION OF FISSILE MATERIALS CONTAINING TANTALUM METAL  

DOE Green Energy (OSTI)

The dissolution of composite materials containing plutonium (Pu) and tantalum (Ta) metals is currently performed in Phase I of the HB-Line facility. The conditions for the present flowsheet are the dissolution of 500 g of Pu metal in the 15 L dissolver using a 4 M nitric acid (HNO{sub 3}) solution c