Sample records for brown powder obtained

  1. alloy powders obtained: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  2. Role of cold isostatic pressing in the formation of the properties of ZrO{sub 2}-base ceramics obtained from ultradisperse powders

    SciTech Connect (OSTI)

    Akimov, G.Y.; Prokhorov, I.Y.; Gorelik, I.V. [Donetsk Physicotechnical Institute (Ukraine)] [and others

    1995-09-01T23:59:59.000Z

    The physicomechanical properties of ceramics obtained from plasmachemical and sol-gel powders of partially stabilized (3% Y{sub 2}O{sub 3}) zirconia (PSZ) and its compositions with 20% Al{sub 2}O{sub 3} by cold isostatic pressing (CIP) at a pressure of at most 2 GPa and sintering at 1300-1650{degrees}C are investigated. It is established that plasmachemical PSZ exhibits its best properties (K{sub 1c} = 7.8 MPa {center_dot} m{sup 1/2}, a strength of 650 MPa) only after complete disintegration at a CIP of 0.1 GPa and a sintering temperature of 1650{degrees}C, when the material is sintered to a density of 5.5 g/cm{sup 3}. After partial stabilization and CIP at 0.1 GPa the plasmachemical composition of PSZ + 20% Al{sub 2}O{sub 3} is sintered at 1650{degrees}C to a density of 4.7 g/cm{sup 3}, but has K{sub 1c} = 8.5 MPa {center_dot} m{sup 1/2} and a strength of 700 MPa. The deagglomerated sol-gel powder exhibits properties at a level of K{sub 1c} = 12.4 MPa {center_dot} m{sup 1/2} and a strength of 950 MPa at a density above 6.0 g/cm{sup 3} after CIP at 0.3 GPa and sintering at 1450{degrees}C. The latter obviously has the best mechanical properties of all the investigated materials.

  3. A Textile Information Resource for Extension Agents and 4-H Leaders Pamela J. Brown, Ph.D.

    E-Print Network [OSTI]

    FIBERS A Textile Information Resource for Extension Agents and 4-H Leaders 1999 Pamela J. Brown, Ph cotton tree -lightweight, soft fiber -with use, has a tendency to break down into a powder -used Abaca -obtained from a member of the banana tree family; sometimes referred to as Manila hemp -produced

  4. Process for the polymerization of vinyl chloride in aqueous suspension utilizing an oil-soluble initiator and subsequently a water-soluble initiator and use of the powders obtained thereby

    SciTech Connect (OSTI)

    Petit, A.

    1981-01-06T23:59:59.000Z

    Process for the polymerization of vinyl chloride in aqueous suspension in the presence of a dispersing system comprising a cellulosic derivative and an anionic emulsifying agent wherein the polymerizaton is initiated by an oil-soluble initiator and a water-soluble free radical polymerization initiator is added in the course of polymerization. The thus obtained polyvinyl chloride powders are particularly suitable for the production of battery separators.

  5. Silica powders for powder evacuated thermal insulating panel and method

    DOE Patents [OSTI]

    Harris, M.T.; Basaran, O.A.; Kollie, T.G.; Weaver, F.J.

    1996-01-02T23:59:59.000Z

    A powder evacuated thermal insulating panel using generally spherical and porous silica particles of a median size less than about 100 nanometers in diameter, a pour packing density of about 0.4 to 0.6 g/cm{sup 3} and an external surface area in the range of about 90 to 600 m{sup 2}/g is described. The silica powders are prepared by reacting a tetraalkyl silicate with ammonia and water in an alcohol solvent, distilling the solution after the reaction to remove the ammonia and recover the alcohol. The resulting aqueous slurry was dried, ball-milled, and dried again to provide the silica particles with defined internal and external porosity. The nanometer size and the large external surface area of the silica particles along with the internal and external porosity of the silica particles provide powder evacuated thermal insulating panels with significantly higher R-values than obtainable using previously known silica powders. 2 figs.

  6. Silica powders for powder evacuated thermal insulating panel and method

    DOE Patents [OSTI]

    Harris, Michael T. (Knoxville, TN); Basaran, Osman A. (Oak Ridge, TN); Kollie, Thomas G. (Oak Ridge, TN); Weaver, Fred J. (Knoxville, TN)

    1996-01-01T23:59:59.000Z

    A powder evacuated thermal insulating panel using generally spherical and porous silica particles of a median size less than about 100 nanometers in diameter, a pour packing density of about 0.4 to 0.6 g/cm.sup.3 and an external surface area in the range of about 90 to 600 m.sup.2/ g is described. The silica powders are prepared by reacting a tetraakyl silicate with ammonia and water in an alcohol solvent, distilling the solution after the reaction to remove the ammonia and recover the alcohol. The resulting aqueous slurry was dried, ball-milled, and dried again to provide the silica particles with defined internal and external porosity. The nanometer size and the large external surface area of the silica particles along with the internal and external porosity of the silica particles provide powder evacuated thermal insulating panels with significantly higher R-values than obtainable using previously known silica powders.

  7. Silica powders for powder evacuated thermal insulating panel and method

    DOE Patents [OSTI]

    Harris, Michael T. (Knoxville, TN); Basaran, Osman A. (Oak Ridge, TN); Kollie, Thomas G. (Oak Ridge, TN); Weaver, Fred J. (Knoxville, TN)

    1994-01-01T23:59:59.000Z

    A powder evacuated thermal insulating panel using generally spherical and porous silica particles of a median size less than about 100 nanometers in diameter, a pour packing density of about 0.4 to 0.6 g/cm.sup.3 and an external surface area in the range of about 90 to 600 m.sup.2 /g is described. The silica powders are prepared by reacting a tetraakyl silicate with ammonia and water in an alcohol solvent, distilling the solution after the reaction to remove the ammonia and recover the alcohol. The resulting aqueous slurry was dried, ball-milled, and dried again to provide the silica particles with defined internal and external porosity. The nanometer size and the large external surface area of the silica particles along with the internal and external porosity of the silica particles provide powder evacuated thermal insulating panels with significantly higher R-values than obtainable using previously known silica powders.

  8. Silica powders for powder evacuated thermal insulating panel and method

    DOE Patents [OSTI]

    Harris, Michael T. (Knoxville, TN); Basaran, Osman A. (Oak Ridge, TN); Kollie, Thomas G. (Oak Ridge, TN); Weaver, Fred J. (Knoxville, TN)

    1995-01-01T23:59:59.000Z

    A powder evacuated thermal insulating panel using generally spherical and porous silica particles of a median size less than about 100 nanometers in diameter, a pour packing density of about 0.4 to 0.6 g/cm.sup.3 and an external surface area in the range of about 90 to 600 m.sup.2/ g is described. The silica powders are prepared by reacting a tetraakyl silicate with ammonia and water in an alcohol solvent, distilling the solution after the reaction to remove the ammonia and recover the alcohol. The resulting aqueous slurry was dried, ball-milled, and dried again to provide the silica particles with defined internal and external porosity. The nanometer size and the large external surface area of the silica particles along with the internal and external porosity of the silica particles provide powder evacuated thermal insulating panels with significantly higher R-values than obtainable using previously known silica powders.

  9. Powder dispersion system

    DOE Patents [OSTI]

    Gorenz, Heather M. (Albuquerque, NM); Brockmann, John E. (Albuquerque, NM); Lucero, Daniel A. (Albuquerque, NM)

    2011-09-20T23:59:59.000Z

    A powder dispersion method and apparatus comprising an air eductor and a powder dispensing syringe inserted into a suction connection of the air eductor.

  10. Sterling A. Brown

    E-Print Network [OSTI]

    Tidwell, John E.

    1982-01-01T23:59:59.000Z

    13 STERLING A. BROWN We sincerely appreciate Charles Rowell's asking us to write this in- troductory note to Callaloo's special section on Sterling Brown. Several recent studies, symposia, and awards are testaments to a revi- val of critical... interest in Sterling Brown, poet, literary critic, teacher, anthologist, and raconteur. The Collected Poems of Sterling A. Brown (Harper & Row), for example, received the Lenore Marshall Poetry Prize for 1980 from Saturday Review. The Modern Language...

  11. Precision powder feeder

    DOE Patents [OSTI]

    Schlienger, M. Eric (Albuquerque, NM); Schmale, David T. (Albuquerque, NM); Oliver, Michael S. (Sandia Park, NM)

    2001-07-10T23:59:59.000Z

    A new class of precision powder feeders is disclosed. These feeders provide a precision flow of a wide range of powdered materials, while remaining robust against jamming or damage. These feeders can be precisely controlled by feedback mechanisms.

  12. Aluminum powder metallurgy processing

    SciTech Connect (OSTI)

    Flumerfelt, J.F.

    1999-02-12T23:59:59.000Z

    The objective of this dissertation is to explore the hypothesis that there is a strong linkage between gas atomization processing conditions, as-atomized aluminum powder characteristics, and the consolidation methodology required to make components from aluminum powder. The hypothesis was tested with pure aluminum powders produced by commercial air atomization, commercial inert gas atomization, and gas atomization reaction synthesis (GARS). A comparison of the GARS aluminum powders with the commercial aluminum powders showed the former to exhibit superior powder characteristics. The powders were compared in terms of size and shape, bulk chemistry, surface oxide chemistry and structure, and oxide film thickness. Minimum explosive concentration measurements assessed the dependence of explosibility hazard on surface area, oxide film thickness, and gas atomization processing conditions. The GARS aluminum powders were exposed to different relative humidity levels, demonstrating the effect of atmospheric conditions on post-atomization processing conditions. The GARS aluminum powders were exposed to different relative humidity levels, demonstrating the effect of atmospheric conditions on post-atomization oxidation of aluminum powder. An Al-Ti-Y GARS alloy exposed in ambient air at different temperatures revealed the effect of reactive alloy elements on post-atomization powder oxidation. The pure aluminum powders were consolidated by two different routes, a conventional consolidation process for fabricating aerospace components with aluminum powder and a proposed alternative. The consolidation procedures were compared by evaluating the consolidated microstructures and the corresponding mechanical properties. A low temperature solid state sintering experiment demonstrated that tap densified GARS aluminum powders can form sintering necks between contacting powder particles, unlike the total resistance to sintering of commercial air atomization aluminum powder.

  13. California’s 2012–2013 Budget: Brown’s Budget Gamble

    E-Print Network [OSTI]

    DiSarro, Brian; Hussey, Wesley

    2013-01-01T23:59:59.000Z

    Gov. Jerry Brown’s new budget plan targets schools. 24Gov. Jerry Brown’s new budget plan targets schools. 25Gov. Jerry Brown’s new budget plan targets schools. 26

  14. Multiple feed powder splitter

    DOE Patents [OSTI]

    Lewis, Gary K. (Los Alamos, NM); Less, Richard M. (Los Alamos, NM)

    2002-01-01T23:59:59.000Z

    A device for providing uniform powder flow to the nozzles when creating solid structures using a solid fabrication system such as the directed light fabrication (DLF) process. In the DLF process, gas entrained powders are passed through the focal point of a moving high-power laser light which fuses the particles in the powder to a surface being built up in layers. The invention is a device providing uniform flow of gas entrained powders to the nozzles of the DLF system. The device comprises a series of modular splitters which are slidably interconnected and contain an integral flow control mechanism. The device can take the gas entrained powder from between one to four hoppers and split the flow into eight tubular lines which feed the powder delivery nozzles of the DLF system.

  15. Multiple feed powder splitter

    DOE Patents [OSTI]

    Lewis, Gary K. (Los Alamos, NM); Less, Richard M. (Los Alamos, NM)

    2001-01-01T23:59:59.000Z

    A device for providing uniform powder flow to the nozzles when creating solid structures using a solid fabrication system such as the directed light fabrication (DLF) process. In the DLF process, gas entrained powders are passed through the focal point of a moving high-power laser light which fuses the particles in the powder to a surface being built up in layers. The invention is a device providing uniform flow of gas entrained powders to the nozzles of the DLF system. The device comprises a series of modular splitters which are slidably interconnected and contain an integral flow control mechanism. The device can take the gas entrained powder from between one to four hoppers and split the flow into eight tubular lines which feed the powder delivery nozzles of the DLF system.

  16. BROWN ALGAE Colpomenia sinuosa

    E-Print Network [OSTI]

    Sullivan, Matthew B.

    BROWN ALGAE Colpomenia sinuosa GREEN ALGAE Dictyosphaeria cavernosa Amphiroa fragilissima Gelidiopsis intricata Botryocladia pyriformis RED ALGAE CYANOBACTERIA Oscillitoria acuminata Schizothrix sp. "ALGAE"­ A DIVERSE ASSORTMENT OF LIFE FORMS Photosynthesis is performed by a taxonomically diverse

  17. Brandeis University Brown University

    E-Print Network [OSTI]

    Jiang, Huiqiang

    Institute of Technology McGill University Michigan State University New York University Northwestern University of Kansas University of Maryland, College Park University of Michigan University of MinnesotaBrandeis University Brown University California Institute of Technology Carnegie Mellon University

  18. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2003-08-05T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of ternary mixtures consisting of: Ni powder, Cu powder, and Al powder, Ni powder, Cr powder, and Al powder; Ni powder, W powder and Al powder; Ni powder, V powder, and Al powder; Ni powder, Mo powder, and Al powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  19. Steven Brown Oral History

    E-Print Network [OSTI]

    Brown, Steven; Albin, Tami

    2010-11-24T23:59:59.000Z

    Part 4 video platform video management video solutionsvideo player Part 5 video platform video management video solutionsvideo player Part 6 video platform video management video solutionsvideo player Part 7 video platform video... Under the Rainbow: Oral Histories of GLBTQ People in Kansas Steven Brown Oral History Part 2 video platform video management video solutionsvideo player Part 3 video platform video management video solutionsvideo player...

  20. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2003-08-19T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  1. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2005-05-10T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  2. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2003-08-26T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  3. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2003-07-29T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  4. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2004-09-28T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  5. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2005-01-25T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  6. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goval, Amit; Williams, Robert K.; Kroeger, Donald M.

    2005-06-07T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  7. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2004-09-14T23:59:59.000Z

    A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  8. Ultrafine hydrogen storage powders

    DOE Patents [OSTI]

    Anderson, Iver E. (Ames, IA); Ellis, Timothy W. (Doylestown, PA); Pecharsky, Vitalij K. (Ames, IA); Ting, Jason (Ames, IA); Terpstra, Robert (Ames, IA); Bowman, Robert C. (La Mesa, CA); Witham, Charles K. (Pasadena, CA); Fultz, Brent T. (Pasadena, CA); Bugga, Ratnakumar V. (Arcadia, CA)

    2000-06-13T23:59:59.000Z

    A method of making hydrogen storage powder resistant to fracture in service involves forming a melt having the appropriate composition for the hydrogen storage material, such, for example, LaNi.sub.5 and other AB.sub.5 type materials and AB.sub.5+x materials, where x is from about -2.5 to about +2.5, including x=0, and the melt is gas atomized under conditions of melt temperature and atomizing gas pressure to form generally spherical powder particles. The hydrogen storage powder exhibits improved chemcial homogeneity as a result of rapid solidfication from the melt and small particle size that is more resistant to microcracking during hydrogen absorption/desorption cycling. A hydrogen storage component, such as an electrode for a battery or electrochemical fuel cell, made from the gas atomized hydrogen storage material is resistant to hydrogen degradation upon hydrogen absorption/desorption that occurs for example, during charging/discharging of a battery. Such hydrogen storage components can be made by consolidating and optionally sintering the gas atomized hydrogen storage powder or alternately by shaping the gas atomized powder and a suitable binder to a desired configuration in a mold or die.

  9. Iowa Powder Atomization Technologies

    SciTech Connect (OSTI)

    None

    2012-01-01T23:59:59.000Z

    The same atomization effect seen in a fuel injector is being applied to titanium metal resulting in fine titanium powders that are less than half the width of a human hair. Titanium melts above 3,000°F and is highly corrosive therefore requiring specialized containers. The liquid titanium is poured through an Ames Laboratory - USDOE patented tube which is intended to increase the energy efficiency of the atomization process, which has the ability to dramatically decrease the cost of fine titanium powders. This novel process could open markets for green manufacturing of titanium components from jet engines to biomedical implants.

  10. Iowa Powder Atomization Technologies

    ScienceCinema (OSTI)

    None

    2013-03-01T23:59:59.000Z

    The same atomization effect seen in a fuel injector is being applied to titanium metal resulting in fine titanium powders that are less than half the width of a human hair. Titanium melts above 3,000°F and is highly corrosive therefore requiring specialized containers. The liquid titanium is poured through an Ames Laboratory - USDOE patented tube which is intended to increase the energy efficiency of the atomization process, which has the ability to dramatically decrease the cost of fine titanium powders. This novel process could open markets for green manufacturing of titanium components from jet engines to biomedical implants.

  11. affects browning susceptibility: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    17 ECOTOXICOLOGY Exposure of Brown Recluse and Brown Widow Spiders (Araneae Renewable Energy Websites Summary: ECOTOXICOLOGY Exposure of Brown Recluse and Brown Widow Spiders...

  12. acquired brown syndrome: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9 ECOTOXICOLOGY Exposure of Brown Recluse and Brown Widow Spiders (Araneae Renewable Energy Websites Summary: ECOTOXICOLOGY Exposure of Brown Recluse and Brown Widow Spiders...

  13. Alabama Nuclear Profile - Browns Ferry

    U.S. Energy Information Administration (EIA) Indexed Site

    Browns Ferry" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

  14. Idaho_Brown

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching. | EMSLtheIndustryMitch Arkoosh SiteMtn.Reta Brown

  15. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, Raghunath (Littleton, CO)

    1998-01-01T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic and/or reduced particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of all metals in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products.

  16. Silicon nitride/silicon carbide composite powders

    DOE Patents [OSTI]

    Dunmead, Stephen D. (Midland, MI); Weimer, Alan W. (Midland, MI); Carroll, Daniel F. (Midland, MI); Eisman, Glenn A. (Midland, MI); Cochran, Gene A. (Midland, MI); Susnitzky, David W. (Midland, MI); Beaman, Donald R. (Midland, MI); Nilsen, Kevin J. (Midland, MI)

    1996-06-11T23:59:59.000Z

    Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.

  17. Observations on the biology of the smoky brown cockroach

    E-Print Network [OSTI]

    Clark, Jerry Lee

    1970-01-01T23:59:59.000Z

    . Of these, fresh apple, brown sugar, wet dehydrated potato, and wet powdered milk were most preferred. Seven types of materials were tested for preference by the roach as resting surface sites. In descending order of preference, these were concrete... cockroach had not been reported before 1940 (Gould and Deay 1940a). This study was very scanty in that only a small number of roaches were used. Thus the need existed for an extensive investigation of the:life history of this species. A number of food...

  18. Radiological Powder XRD | EMSL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromising Science for1 20115,PerformanceUsingFIB/SEM (Quanta)Powder

  19. Powder XRD | EMSL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar Home Design PassivePostdoctoral Opportunities Are you Your CartPowder

  20. Brown, Lipton, and the Prospects of High-level IBE Brown's Project

    E-Print Network [OSTI]

    Fitelson, Branden

    Brown, Lipton, and the Prospects of High-level IBE Brown's Project With Brown's paper we turn question about the selection procedures which scientists use for identifying those theories which

  1. Synthesis of high purity sinterable silicon carbide powder

    SciTech Connect (OSTI)

    Boecker, W.D.; Mehosky, B.L.; Rogers, R.S.C.; Storm, R.S.; Venkateswaran, V. (Carborundum Co., Niagara Falls, NY (USA). Structural Ceramics Div.)

    1989-11-01T23:59:59.000Z

    High purity, submicron silicon carbide powders were produced via gas phase synthesis using a hydrogen/argon plasma. Two test facilities were constructed, a bench-scale unit and a larger pilot scale reactor. Three candidate silicon sources were evaluated:silicon tetrachloride (SiCl{sub 4}). dimethyldichlorosilane (CH{sub 3}){sub 2}(SiCl{sub 2}) and methyltrichlorosilane (CH{sub 3}SiCl{sub 3}). Product powders were evaluated on the basis of pressureless sinterability, surface area, agglomeration, particle size distribution, phase distribution and chemistry. Three commercial powders, Starck A10, Starck B10, and Carborundum submicron alpha silicon carbide, were also evaluated for comparison to the product powders. Powders were reproducibly synthesized at a rate of one pound per hour for standard run times of five hours. Product powders exhibited chemical and physical properties equal to or exceeding the commercial powders evaluated. In limited attempts to pressureless sinter the product powders, densities of 91% of theoretical were obtained with as-produced powder. Post-processing permitted densities in excess of 97% of theoretical. X-ray diffraction of the product indicates that the product powders are primarily beta poly-types, with traces of alpha present. Increased production rates to a target level of seven pounds per hour were not possible due to current transients produced by the pilot scale power supply. Extensive unsuccessful efforts to reduce or eliminate the transients are described. Low recovered product yields resulted from a failure of a product collection filter that was not discovered until the completion of the project.

  2. Morphology and composition of Ni-Co electrodeposited powders

    SciTech Connect (OSTI)

    Maksimovic, V.M., E-mail: vesnam@vinca.rs [Institute of Nuclear Sciences, 'Vinca', University of Belgrade, 11001 Belgrade, P. O. Box 522 (Serbia); Lacnjevac, U.C. [Institute for Multidisciplinary research, University of Belgrade, P.O. Box 33, 11030 Belgrade (Serbia); Stoiljkovic, M.M. [Institute of Nuclear Sciences, 'Vinca', University of Belgrade, 11001 Belgrade, P. O. Box 522 (Serbia); Pavlovic, M.G. [Institute of Electrochemistry, ICTM, University of Belgrade, 11000 Belgrade, Njegoseva 12 (Serbia); Jovic, V.D. [Institute for Multidisciplinary research, University of Belgrade, P.O. Box 33, 11030 Belgrade (Serbia)

    2011-12-15T23:59:59.000Z

    The morphology, phase and chemical composition of Ni-Co alloy powders electrodeposited from an ammonium sulfate-boric acid containing electrolyte with different ratio of Ni/Co ions were investigated. The ratios of Ni/Co ions were 1/1, 1/2 and 1/3. The morphology, chemical composition and phase composition of the electrodeposited alloy powders were investigated using AES, SEM, EDS and XRD analysis. Composition of the electrolyte, i.e. the ratio of Ni/Co concentrations was found to influence both, the alloy phase composition and the morphology of Ni-Co alloy powders. At the highest ratio of Ni/Co = 1/1 concentrations typical 2D fern-like dendritic particles were obtained. With a decrease of Ni/Co ions ratio among 2D fern-like dendrites, 3D dendrites and different agglomerates were obtained. X-ray diffraction studies showed that the alloy powders mainly consisted of the face-centered cubic {alpha}-nickel phase and hexagonal close-packed {epsilon}-cobalt phase and minor proportions of face-centered cubic {alpha}-cobalt phase. The occurrence of the latter phase was observed only in the alloy powder with the higher cobalt concentration in electrolyte. The electrodeposition of Ni-Co powders occurred in an anomalous manner. - Highlights: Black-Right-Pointing-Pointer Ni-Co alloys powders were successfully electrodeposited. Black-Right-Pointing-Pointer Composition of the electrolyte (Ni/Co ions ratio) was found to influence on morphology of powders. Black-Right-Pointing-Pointer The electrodeposition of Ni-Co powders occurred in an anomalous manner.

  3. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, R.

    1998-08-04T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic and/or reduced particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of all metals in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products. 7 figs.

  4. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, Raghunath (Littleton, CO); Blaugher, Richard D. (Evergreen, CO)

    1995-01-01T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals, such as nitrate salts of thallium, barium, calcium, and copper, which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of thallium in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products.

  5. Method for molding ceramic powders

    DOE Patents [OSTI]

    Janney, M.A.

    1990-01-16T23:59:59.000Z

    A method for molding ceramic powders comprises forming a slurry mixture including ceramic powder, a dispersant for the metal-containing powder, and a monomer solution. The monomer solution includes at least one multifunctional monomer, a free-radical initiator, and an organic solvent. The slurry mixture is transferred to a mold, and the mold containing the slurry mixture is heated to polymerize and crosslink the monomer and form a firm polymer-solvent gel matrix. The solid product may be removed from the mold and heated to first remove the solvent and subsequently remove the polymer, where after the product may be sintered.

  6. Method for molding ceramic powders

    DOE Patents [OSTI]

    Janney, Mark A. (Knoxville, TN)

    1990-01-01T23:59:59.000Z

    A method for molding ceramic powders comprises forming a slurry mixture including ceramic powder, a dispersant for the metal-containing powder, and a monomer solution. The monomer solution includes at least one multifunctional monomer, a free-radical initiator, and an organic solvent. The slurry mixture is transferred to a mold, and the mold containing the slurry mixture is heated to polymerize and crosslink the monomer and form a firm polymer-solvent gel matrix. The solid product may be removed from the mold and heated to first remove the solvent and subsequently remove the polymer, whereafter the product may be sintered.

  7. Relationally-Parametric Polymorphic Contracts Brown University

    E-Print Network [OSTI]

    Krishnamurthi, Shriram

    Relationally-Parametric Polymorphic Contracts Arjun Guha Brown University arjun@cs.brown.edu Jacob are not made or distributed for profit or commercial advantage and that copies bear this notice and the full

  8. Rotary powder feed through apparatus

    DOE Patents [OSTI]

    Lewis, Gary K. (Los Alamos, NM); Less, Richard M. (Los Alamos, NM)

    2001-01-01T23:59:59.000Z

    A device for increasing the uniformity of solids within a solids fabrication system, such as a direct light fabrication (DLF) system in which gas entrained powders are passed through the focal point of a moving high-power light which fuses the particles in the powder to a surface being built up in layers. The invention provides a feed through interface wherein gas entrained powders input from stationary input lines are coupled to a rotating head of the fabrication system. The invention eliminates the need to provide additional slack in the feed lines to accommodate head rotation, and therefore reduces feed line bending movements which induce non-uniform feeding of gas entrained powder to a rotating head.

  9. Neutron detectors comprising boron powder

    SciTech Connect (OSTI)

    Wang, Zhehui; Morris, Christopher; Bacon, Jeffrey Darnell; Makela, Mark F; Spaulding, Randy Jay

    2013-05-21T23:59:59.000Z

    High-efficiency neutron detector substrate assemblies comprising a first conductive substrate, wherein a first side of the substrate is in direct contact with a first layer of a powder material comprising .sup.10boron, .sup.10boron carbide or combinations thereof, and wherein a conductive material is in proximity to the first layer of powder material; and processes of making said neutron detector substrate assemblies.

  10. Two Lost Sonnets by Sterling A. Brown

    E-Print Network [OSTI]

    Tidwell, John E.

    1998-09-01T23:59:59.000Z

    TWO LOST SONNETS BY STERLING A. BROWN edited and introduced by John Edgar Tidwell and Ted Genoways The emergence of Sterling A. Brown into poetic maturity resulted from a well- known dialectical engagement with the aesthetics of African...-American folk tradition. As Brown recounted so often, these experiential and imaginative encounters derived from a benevolent conspiracy between his theologian father, the Rev. Sterling Nelson Brown, and the eminent historian Carter G. Woodson to send...

  11. Powder collection apparatus/method

    DOE Patents [OSTI]

    Anderson, I.E.; Terpstra, R.L.; Moore, J.A.

    1994-01-11T23:59:59.000Z

    Device for separating and collecting ultrafine atomized powder from the gas stream of a gas atomizing apparatus comprises a housing having an interior wall oriented at an angle relative to horizontal so as to form a downwardly converging, conical expansion chamber, an inlet conduit communicated to the expansion chamber proximate an upper region thereof for receiving the gas stream, and an outlet proximate a lower region of the expansion chamber. The inlet conduit is oriented at a compound inclined angle (with respect to horizontal) selected to promote separation and collection of powder from the gas stream in the expansion chamber. The compound angle comprises a first entrance angle that is greater than the angle of repose of the powder on the housing interior wall such that any powder accumulation in the inlet conduit tends to flow down the wall toward the outlet. The second angle is selected generally equal to the angle of the housing interior wall measured from the same horizontal plane so as to direct the gas stream into the expansion chamber generally tangent to the housing interior wall to establish a downward swirling gas stream flow in the expansion chamber. A powder collection container is communicated to the outlet of the expansion chamber to collect the powder for further processing. 4 figures.

  12. L. Frank Brown, Jr. Publications

    E-Print Network [OSTI]

    Yang, Zong-Liang

    , Seismic stratigraphic interpretation and petroleum potential: Tulsa, American Association of Petroleum. W., and McGowen, J. H., 1971, Resource capability units, their utility in land and water-use Association of Petroleum Geologists, AAPG Memoir 58, p. 43­69. Muntingh, A., and Brown, L. F., Jr., 1994

  13. Polymer quenched prealloyed metal powder

    DOE Patents [OSTI]

    Hajaligol, Mohammad R. (Midlothian, VA); Fleischhauer, Grier (Midlothian, VA); German, Randall M. (State College, PA)

    2001-01-01T23:59:59.000Z

    A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.0.05% Zr .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Ni, .ltoreq.0.75% C, .ltoreq.0.1% B, .ltoreq.1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, and/or .ltoreq.3 % Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 .mu.m. Final stress relief annealing can be carried out in the B2 phase temperature range.

  14. Intradermal needle-free powdered drug injection

    E-Print Network [OSTI]

    Liu, John (John Hsiao-Yung)

    2012-01-01T23:59:59.000Z

    This thesis presents a new method for needle-free powdered drug injection. The design, construction, and testing of a bench-top helium-powered device capable of delivering powder to controllable depths within the dermis ...

  15. Fermilab Today | Brown University Profile

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility ofSmall Works: 2008Submit a5,19,Brown University April

  16. High-performance Ni[sub 3]Al synthesized from composite powders

    SciTech Connect (OSTI)

    Chiou, W.C.; Hu, C.T. (National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Materials Science and Engineering)

    1994-05-01T23:59:59.000Z

    Specimens of Ni[sub 3]Al + B of high density (>99.3 pct RD) and relatively large dimension have been synthesized from composite powders through processes of replacing plating and electroless Ni-B plating on Al powder, sintering, and thermal-mechanical treatment. The uniformly coated Ni layer over fine Al or Ni core particles constituting these coating/core composite powders has advantages such as better resistance to oxidation relative to pure Al powder, a greater green density as a compacted powder than prealloyed powder, the possibility of atomically added B to the material by careful choice of a suitable plating solution, and avoidance of the expensive powder metallurgy (PM) equipment such as a hot isostatic press (HIP), hot press (HP), etc. The final Ni[sub 3]Al + B product is made from Ni-B-Al and Ni-B-Ni mixed composite powders by means of traditional PM processes such as compacting, sintering, rolling, and annealing, and therefore, the dimensions of the product are not constrained by the capacity of an HIP or HP. The properties of Ni[sub 3]Al composite powder metallurgy (CPM) specimens tested at room temperature have been obtained, and comparison with previous reports is conducted. A tensile elongation of about 16 pct at room temperature was attained.

  17. MESOSCALE SIMULATIONS OF POWDER COMPACTION

    SciTech Connect (OSTI)

    Lomov, Ilya; Fujino, Don; Antoun, Tarabay; Liu, Benjamin [Lawrence Livermore National Laboratory, P. O. Box 808, Livermore CA 94551 (United States)

    2009-12-28T23:59:59.000Z

    Mesoscale 3D simulations of shock compaction of metal and ceramic powders have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating a well-characterized shock compaction experiment of a porous ductile metal. Simulation results using the Steinberg material model and handbook values for solid 2024 aluminum showed good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not as well studied as metals, so a simple material model for solid ceramic (tungsten carbide) has been calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powders have been performed and showed good agreement with experimental data. The numerical shock wave profile has same character and thickness as that measured experimentally using VISAR. The numerical results show reshock states above the single-shock Hugoniot line as observed in experiments. We found that for good quantitative agreement with experiments 3D simulations are essential.

  18. Brown carbon formation from ketoaldehydes of biogenic monoterpenes...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Brown carbon formation from ketoaldehydes of biogenic monoterpenes. Brown carbon formation from ketoaldehydes of biogenic monoterpenes. Abstract: Sources and chemical composition...

  19. Process for the synthesis of iron powder

    DOE Patents [OSTI]

    Welbon, W.W.

    1983-11-08T23:59:59.000Z

    A process for preparing iron powder suitable for use in preparing the iron-potassium perchlorate heat-powder fuel mixture used in thermal batteries, comprises preparing a homogeneous, dense iron oxide hydroxide precipitate by homogeneous precipitation from an aqueous mixture of a ferric salt, formic or sulfuric acid, ammonium hydroxide and urea as precipitating agent; and then reducing the dense iron oxide hydroxide by treatment with hydrogen to prepare the iron powder. 2 figs.

  20. Process for the synthesis of iron powder

    DOE Patents [OSTI]

    Not Available

    1982-03-06T23:59:59.000Z

    A process for preparing iron powder suitable for use in preparing the iron-potassium perchlorate heat-powder fuel mixture used in thermal batteries, comprises preparing a homogeneous, dense iron oxide hydroxide precipitate by homogeneous precipitation from an aqueous mixture of a ferric salt, formic or sulfuric acid, ammonium hydroxide and urea as precipitating agent; and then reducing the dense iron oxide hydroxide by treatment with hydrogen to prepare the iron powder.

  1. Human Biology Program Brown Bag Series

    E-Print Network [OSTI]

    Indiana University

    Human Biology Program Brown Bag Series Fall 2012 12:001:00 pm Morrison Hall 103 SeptemberVisser Department of Biology & Human Biology Prog. "Good Behavior, Bad Behavior: Insights From the Microbial

  2. L. A. Brown, M. C. Higuera

    Office of Scientific and Technical Information (OSTI)

    Brown, M. C. Higuera Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and L b SANDlA REPORT SAND974017 0 UC-700 Unlimited Release Printed February i 998...

  3. The construction of the Browns Bay Vessel

    E-Print Network [OSTI]

    Amer, Christopher Francis

    2012-06-07T23:59:59.000Z

    INVESTIGATIVE TECHNIQUES. 10 19 The Site. National Historic Sites Service Excavation and Raising of the Vessel Vessel on Display. The Vessel in 1985. 19 20 27 28 Method of Recording III THE CONSTRUCTION OF THE VESSEL 31 36 The Keel 36 The Stem... A flat-bottomed boat being built. 17 9 Forelocked eye-bolts from the midship beam of the Browne Bay Vessel 21 10 Broad arrow stamped in an eye-bolt from the Browns Bay Vessel. . . . . . . . . . . . . . . . . . . . . . . . . . . 22 11 Pulley...

  4. Fractal Analysis of Flame-Synthesized Nanostructured Silica and Titania Powders Using Small-Angle X-ray

    E-Print Network [OSTI]

    Beaucage, Gregory

    Fractal Analysis of Flame-Synthesized Nanostructured Silica and Titania Powders Using Small-Angle X these powders display mass-fractal morphologies, which are composed of ramified aggregates of nanoscale primary particles. Primary particle size, aggregate size, fractal dimension, and specific surface area are obtained

  5. Recovery of yttrium from cathode ray tubes and lamps’ fluorescent powders: experimental results and economic simulation

    SciTech Connect (OSTI)

    Innocenzi, V., E-mail: valentina.innocenzi1@univaq.it; De Michelis, I.; Ferella, F.; Vegliò, F.

    2013-11-15T23:59:59.000Z

    Highlights: • Fluorescent powder of lamps. • Fluorescent powder of cathode ray rubes. • Recovery of yttrium from fluorescent powders. • Economic simulation for the processes to recover yttrium from WEEE. - Abstract: In this paper, yttrium recovery from fluorescent powder of lamps and cathode ray tubes (CRTs) is described. The process for treating these materials includes the following: (a) acid leaching, (b) purification of the leach liquors using sodium hydroxide and sodium sulfide, (c) precipitation of yttrium using oxalic acid, and (d) calcinations of oxalates for production of yttrium oxides. Experimental results have shown that process conditions necessary to purify the solutions and recover yttrium strongly depend on composition of the leach liquor, in other words, whether the powder comes from treatment of CRTs or lamp. In the optimal experimental conditions, the recoveries of yttrium oxide are about 95%, 55%, and 65% for CRT, lamps, and CRT/lamp mixture (called MIX) powders, respectively. The lower yields obtained during treatments of MIX and lamp powders are probably due to the co-precipitation of yttrium together with other metals contained in the lamps powder only. Yttrium loss can be reduced to minimum changing the experimental conditions with respect to the case of the CRT process. In any case, the purity of final products from CRT, lamps, and MIX is greater than 95%. Moreover, the possibility to treat simultaneously both CRT and lamp powders is very important and interesting from an industrial point of view since it could be possible to run a single plant treating fluorescent powder coming from two different electronic wastes.

  6. Continuous Process for Low-Cost, High-Quality YSZ Powder

    SciTech Connect (OSTI)

    Scott L. Swartz; Michael Beachy; Matthew M. Seabaugh

    2006-03-31T23:59:59.000Z

    This report describes results obtained by NexTech Materials, Ltd. in a project funded by DOE under the auspices of the Solid-State Energy Conversion Alliance (SECA). The project focused on development of YSZ electrolyte powder synthesis technology that could be ''tailored'' to the process-specific needs of different solid oxide fuel cell (SOFC) designs being developed by SECA's industry teams. The work in the project involved bench-scale processing work aimed at establishing a homogeneous precipitation process for producing YSZ electrolyte powder, scaleup of the process to 20-kilogram batch sizes, and evaluation of the YSZ powder products produced by the process. The developed process involved the steps of: (a) preparation of an aqueous hydrous oxide slurry via coprecipitation; (b) washing of residual salts from the precipitated hydroxide slurry followed by drying; (c) calcination of the dried powder to crystallize the YSZ powder and achieve desired surface area; and (d) milling of the calcined powder to targeted particle size. YSZ powders thus prepared were subjected to a comprehensive set of characterization and performance tests, including particle size distribution and surface area analyses, sintering performance studies, and ionic conductivity measurements. A number of different YSZ powder formulations were established, all of which had desirable performance attributes relative to commercially available YSZ powders. Powder characterization and performance metrics that were established at the onset of the project were met or exceeded. A manufacturing cost analysis was performed, and a manufactured cost of $27/kg was estimated based on this analysis. The analysis also allowed an identification of process refinements that would lead to even lower cost.

  7. Thermal plasma chemical synthesis of powders

    SciTech Connect (OSTI)

    Vogt, G.J.; Newkirk, L.R.

    1985-01-01T23:59:59.000Z

    Thermal plasma processing has been increasingly used to synthesize submicron powders of high-purity ceramics and metals. The high temperatures generated with the plasma provide a vapor phase reaction zone for elements with high boiling points and refractory materials. An overview is presented on the general plasma technology used in synthesis and on the properties of plasma powders.

  8. Wet powder seal for gas containment

    DOE Patents [OSTI]

    Stang, Louis G. (Sayville, NY)

    1982-01-01T23:59:59.000Z

    A gas seal is formed by a compact layer of an insoluble powder and liquid filling the fine interstices of that layer. The smaller the particle size of the selected powder, such as sand or talc, the finer will be the interstices or capillary spaces in the layer and the greater will be the resulting sealing capacity, i.e., the gas pressure differential which the wet powder layer can withstand. Such wet powder seal is useful in constructing underground gas reservoirs or storage cavities for nuclear wastes as well as stopping leaks in gas mains buried under ground or situated under water. The sealing capacity of the wet powder seal can be augmented by the hydrostatic head of a liquid body established over the seal.

  9. E-Print Network 3.0 - asian brown cloud Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    brown cloud Search Powered by Explorit Topic List Advanced Search Sample search results for: asian brown cloud Page: << < 1 2 3 4 5 > >> 1 ANNOUNCEMENT Project Atmospheric Brown...

  10. 17 Years of Lithium Brown Dwarfs 10/21/12Ringberg Brown Dwarfs 1

    E-Print Network [OSTI]

    Joergens, Viki

    , Graham, ApJ, 428, L57, June. 1994 #12;The First (correct and public) Brown Dwarf: PPl 15 10/21/12Ringberg Dwarf: PPl 15 10/21/12Ringberg Brown Dwarfs 4 We found that the only plausible way to reconcile "lithium dating". This adjustment in age meant that the inferred mass of PPl 15 rose to near the substellar

  11. Hydrodesulfurization and hydrodenitrogenation catalysts obtained from coal mineral matter

    DOE Patents [OSTI]

    Liu, Kindtoken H. D. (Newark, DE); Hamrin, Jr., Charles E. (Lexington, KY)

    1982-01-01T23:59:59.000Z

    A hydrotreating catalyst is prepared from coal mineral matter obtained by low temperature ashing coals of relatively low bassanite content by the steps of: (a) depositing on the low temperature ash 0.25-3 grams of an iron or nickel salt in water per gram of ash and drying a resulting slurry; (b) crushing and sizing a resulting solid; and (c) heating the thus-sized solid powder in hydrogen.

  12. THE NEAR-INFRARED SPECTRUM OF THE BROWN DWARF GLIESE 229B T. R. GEBALLE

    E-Print Network [OSTI]

    Sloan, Gregory C.

    THE NEAR-INFRARED SPECTRUM OF THE BROWN DWARF GLIESE 229B T. R. GEBALLE Joint Astronomy Centre, 660 vapor. Water and methane are both shown to be strong absorbers in the near-infrared spectrum. (1995) obtained a low-resolution ( / 2 150) near-infrared (1­2.5 m) spectrum of Gl 229B and found

  13. LIQUID PHASE SINTERING OF IRON WITH COPPER BASE ALLOY POWDERS

    E-Print Network [OSTI]

    Chen, M.-H.

    2010-01-01T23:59:59.000Z

    Symposium on Powder Metallurgy - The Iron and Steel Inst.a Liquid Phase", Powder Metallurgy, 17 (33), 227 (1974). H.Other made by powder metallurgy techniques. ses to produce

  14. Electrochemical Studies of Packed Iron Powder Electrodes: Effects...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Packed Iron Powder Electrodes: Effects of Common Constituents of Natural Waters on Corrosion Electrochemical Studies of Packed Iron Powder Electrodes: Effects of Common...

  15. acute brown adipose: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    into the brown "lithium dating". This adjustment in age meant that the inferred mass of PPl 15 rose to near the substellar Joergens, Viki 62 Orbital migration and the brown dwarf...

  16. author browne niall: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    into the brown "lithium dating". This adjustment in age meant that the inferred mass of PPl 15 rose to near the substellar Joergens, Viki 63 Orbital migration and the brown dwarf...

  17. FIA-12-0009- In the Matter of Cynthia Brown

    Broader source: Energy.gov [DOE]

    Cynthia Brown filed an Appeal regarding a request she filed under the Freedom of Information Act. In December 2011, Ms. Brown filed a request for records regarding her late mother.

  18. FIA-12-0044- In the Matter of Cynthia Brown

    Broader source: Energy.gov [DOE]

    Cynthia Brown filed an Appeal regarding a request filed under the Freedom of Information Act. In March 2012, Ms. Brown filed a request for records regarding her late mother.

  19. Continuous blending of dry pharmaceutical powders

    E-Print Network [OSTI]

    Pernenkil, Lakshman

    2008-01-01T23:59:59.000Z

    Conventional batch blending of pharmaceutical powders coupled with long quality analysis times increases the production cycle time leading to strained cash flows. Also, scale-up issues faced in process development causes ...

  20. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit (Knoxville, TN); Williams, Robert K. (Knoxville, TN)

    2001-01-01T23:59:59.000Z

    A biaxially textured alloy article comprises Ni powder and at least one powder selected from the group consisting of Cr, W, V, Mo, Cu, Al, Ce, YSZ, Y, Rare Earths, (RE), MgO, CeO.sub.2, and Y.sub.2 O.sub.3 ; compacted and heat treated, then rapidly recrystallized to produce a biaxial texture on the article. In some embodiments the alloy article further comprises electromagnetic or electro-optical devices and possesses superconducting properties.

  1. Synthesis and processing of monosized oxide powders

    DOE Patents [OSTI]

    Barringer, Eric A. (Waltham, MA); Fegley, Jr., M. Bruce (Waban, MA); Bowen, H. Kent (Belmont, MA)

    1985-01-01T23:59:59.000Z

    Uniform-size, high-purity, spherical oxide powders are formed by hydrolysis of alkoxide precursors in dilute alcoholic solutions. Under controlled conditions (concentrations of 0.03 to 0.2 M alkoxide and 0.2 to 1.5 M water, for example) oxide particles on the order of about 0.05 to 0.7 micron can be produced. Methods of doping such powders and forming sinterable compacts are also disclosed.

  2. Tantalum powder consolidation, modeling and properties

    SciTech Connect (OSTI)

    Bingert, S.R.; Vargas, V.D.; Sheinberg, H.C.

    1996-10-01T23:59:59.000Z

    A systematic approach was taken to investigate the consolidation of tantalum powders. The effects of sinter time, temperature and ramp rate; hot isostatic pressing (HIP) temperature and time; and powder oxygen content on consolidation density, kinetics, microstructure, crystallographic texture, and mechanical properties have been evaluated. In general, higher temperatures and longer hold times resulted in higher density compacts with larger grain sizes for both sintering and HIP`ing. HIP`ed compacts were consistently higher in density than sintered products. The higher oxygen content powders resulted in finer grained, higher density HIP`ed products than the low oxygen powders. Texture analysis showed that the isostatically processed powder products demonstrated a near random texture. This resulted in isotropic properties in the final product. Mechanical testing results showed that the HIP`ed powder products had consistently higher flow stresses than conventionally produced plates, and the sintered compacts were comparable to the plate material. A micromechanics model (Ashby HIP model) has been employed to predict the mechanisms active in the consolidation processes of cold isostatic pressing (CIP), HIP and sintering. This model also predicts the density of the end product and whether grain growth should be expected under the applied processing conditions.

  3. Publications of Richard E. Brown Refereed Journal Articles

    E-Print Network [OSTI]

    -2838. Brown, Richard E., and Jonathan G. Koomey. 2003. "Electricity Use in California: Past Trends and Present-Haggerty, H.Y. Iris Cheung, Jay Taneja, David Culler, and Richard Brown. 2013. "Methods for detailed energy E. Brown, and Brett C. Singer. 2013. "Evaluation of miscellaneous and electronic device energy use

  4. Title Position Holder Increased GPA Student Affairs Dr. Charles Brown

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Dr. Charles Brown Associate Vice President & Dean of Students Dr. Corey King 3 6 15 $4000-10,000 per Dr. Charles Brown Associate Vice President & Dean of Students Dr. Corey King Develop a program. Charles Brown Associate Vice President & Dean of Students Dr. Corey King identify student needs, location

  5. Caribbean House Patrick Brown, Faculty Director

    E-Print Network [OSTI]

    Hayden, Nancy J.

    1 Caribbean House Patrick Brown, Faculty Director Jerry Aviles, Student Director Sonia Nelson, Student Director OVERVIEW The Caribbean House will be a phenomenal experience for everyone, not just the Caribbean culture and demonstrate the beautiful lifestyle that we try to live everyday. There is already

  6. Molecular Selectivity of Brown Carbon Chromophores

    SciTech Connect (OSTI)

    Laskin, Julia; Laskin, Alexander; Nizkorodov, Sergey; Roach, Patrick J.; Eckert, Peter A.; Gilles, Mary K.; Wang, Bingbing; Lee, Hyun Ji; Hu, Qichi

    2014-09-18T23:59:59.000Z

    Complementary methods of high-resolution mass spectrometry and micro-spectroscopy were utilized for molecular analysis of secondary organic aerosol (SOA) generated from ozonolysis of two structural monoterpene isomers: D-limonene (LSOA) and a-pinene (PSOA). Laboratory simulated aging of LSOA and PSOA, through conversion of carbonyls into imines mediated by NH3 vapors in humid air, resulted in selective browning of the LSOA sample, while the PSOA sample remained white. Comparative analysis of the reaction products in the aged LSOA and PSOA samples provided insights into chemistry relevant to formation of brown carbon chromophores. A significant fraction of carbonyl-imine conversion products with identical molecular formulas were detected in both samples. This reflects the high level of similarity in the molecular composition of these two closely related SOA materials. Several highly conjugated products were detected exclusively in the brown LSOA sample and were identified as potential chromophores responsible for the observed color change. The majority of the unique products in the aged LSOA sample with the highest number of double bonds contain two nitrogen atoms. We conclude that chromophores characteristic of the carbonyl- imine chemistry in LSOA are highly conjugated oligomers of secondary imines (Schiff bases) present at relatively low concentrations. Formation of this type of conjugated compounds in PSOA is hindered by the structural rigidity of the a-pinene oxidation products. Our results suggest that the overall light-absorbing properties of SOA may be determined by trace amounts of strong brown carbon chromophores.

  7. February 1, 2006 Emmett Brown, Executive Director

    E-Print Network [OSTI]

    Arnold, Douglas N.

    February 1, 2006 Emmett Brown, Executive Director National Fresh Water Fishing Hall of Fame P deduce the length of the fish by assuming a height of the angler of 72" and using direct scaling. Even between the distance of the camera to the angler and to the fish. Discounting that distance leads

  8. David K Brown Geriatrics Scholar Program

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    David K Brown Geriatrics Scholar Program Sponsored By: This project is supported by a grant from the Health Resources and Services Administration (HRSA), under grant number UB4HP19050 West Virginia, DHHR, or U. S. government. #12;Background and Introduction The WVGEC is funded by the U. S. Department

  9. ROBERT BROWN DEPUTY MANAGER, OAK RIDGE OFFICE

    E-Print Network [OSTI]

    ROBERT BROWN DEPUTY MANAGER, OAK RIDGE OFFICE AUGUST 24, 2010 OVERVIEW OF THE UNITED STATES DEPARTMENT OF ENERGY OAK RIDGE OFFICE #12;( 2 ) KEY OAK RIDGE MISSIONS Oak Ridge Office · Science CONTRACTORS Oak Ridge National Laboratory Oak Ridge Institute for Science and Education Office of Scientific

  10. Near-infrared low-resolution spectroscopy of Pleiades L-type brown dwarfs

    E-Print Network [OSTI]

    Bihain, G; Osorio, M R Zapatero; Béjar, V J S; Caballero, J A

    2010-01-01T23:59:59.000Z

    The fundamental properties of brown dwarfs evolve with age. Models describing the evolution of luminosities and effective temperatures, among other physical parameters, can be empirically constrained using brown dwarfs of various masses in star clusters of well determined age and metallicity. We aim to carry out a spectroscopic and photometric characterization of low-mass brown dwarfs of the ~120 Myr old Pleiades open cluster. We obtained low-resolution near-infrared spectra of the J=17.4-18.8 mag candidate L-type brown dwarfs PLIZ 28 and 35, BRB 17, 21, 23, and 29, which are Pleiades members by photometry and proper motion. We also obtained spectra of the well-known J=15.4-16.1 mag late M-type cluster members PPl 1, Teide 1, and Calar 3. We find that the former six objects have early- to mid-L spectral types and confirm previously reported M-types for the other three objects. The spectra of the L0-type BRB 17 and PLIZ 28 present a triangular H-band continuum shape and remarkable VO absorption, indicating tha...

  11. The Decay of Accreting Triple Systems as Brown Dwarf Formation Scenario

    E-Print Network [OSTI]

    Stefan Umbreit; Andreas Burkert; Thomas Henning; Seppo Mikkola; Rainer Spurzem

    2005-01-05T23:59:59.000Z

    We investigate the dynamical decay of non-hierarchical accreting triple systems and its implications on the ejection model as Brown Dwarf formation scenario. A modified chain-regularization scheme is used to integrate the equations of motion, that also allows for mass changes over time as well as for momentum transfer from the accreted gas mass onto the bodies. We integrate an ensemble of triple systems within a certain volume with different accretion rates, assuming several prescriptions of how momentum is transferred onto the bodies. We follow their evolution until the systems have decayed. We analyze the end states and decay times of these systems and determine the fraction of Brown Dwarfs formed, their escape speeds as well as the semi-major axis distribution of the formed Brown Dwarf binaries. We find that the formation probability of Brown Dwarfs depends strongly on the assumed momentum transfer which is related to the motion of the gas. Due to ongoing accretion and consequent shrinkage of the systems, the median escape velocity is increased by a factor of 2 and the binary separations are decreased by a factor of 5 compared with non-accreting systems. Furthermore, the obtained semi-major axis distribution drops off sharply to either side of the median, which is also supported by observations. We conclude that accretion and momentum transfer of accreted gas during the dynamical decay of triple systems is able to produce the observed distribution of close binary Brown Dwarfs, making the ejection model a viable option as Brown Dwarf formation scenario.

  12. Slip casting nano-particle powders for making transparent ceramics

    DOE Patents [OSTI]

    Kuntz, Joshua D. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Landingham, Richard Lee (Livermore, CA); Hollingsworth, Joel P. (Oakland, CA)

    2011-04-12T23:59:59.000Z

    A method of making a transparent ceramic including the steps of providing nano-ceramic powders in a processed or unprocessed form, mixing the powders with de-ionized water, the step of mixing the powders with de-ionized water producing a slurry, sonifing the slurry to completely wet the powder and suspend the powder in the de-ionized water, separating very fine particles from the slurry, molding the slurry, and curing the slurry to produce the transparent ceramic.

  13. Die-target for dynamic powder consolidation

    DOE Patents [OSTI]

    Flinn, J.E.; Korth, G.E.

    1985-06-27T23:59:59.000Z

    A die/target is disclosed for consolidation of a powder, especially an atomized rapidly solidified metal powder, to produce monoliths by the dynamic action of a shock wave, especially a shock wave produced by the detonation of an explosive charge. The die/target comprises a rectangular metal block having a square primary surface with four rectangular mold cavities formed therein to receive the powder. The cavities are located away from the geometrical center of the primary surface and are distributed around such center while also being located away from the geometrical diagonals of the primary surface to reduce the action of reflected waves so as to avoid tensile cracking of the monoliths. The primary surface is covered by a powder retention plate which is engaged by a flyer plate to transmit the shock wave to the primary surface and the powder. Spawl plates are adhesively mounted on other surfaces of the block to act as momentum traps so as to reduce reflected waves in the block. 4 figs.

  14. In vitro kinetics of hepatic glutathione s-transferase conjugation in largemouth bass and brown bullheads

    SciTech Connect (OSTI)

    Gallagher, E.P.; Sheehy, K.M.; Lame, M.W.; Segall, H.J.

    2000-02-01T23:59:59.000Z

    The kinetics of glutathione 5-transferase (GST) catalysis were investigated in largemouth bass (Micropterus salmoides) and brown bullheads (Amerius nebulosus), two freshwater fish species found in a variety of polluted waterways in the eastern US. The initial rates of hepatic GST activity toward four GST substrates, including 1-chloro-2,4-dinitrobenzene, ethacrynic acid, {Delta}5-androstene-17-dione, and nitrobutyl chloride, were significantly higher in brown bullheads than in largemouth bass. Hepatic GST activity toward 1,2-dichloro-4-nitrobenzene, a {mu}-class GST substrate in rodents, was not detectable in either species. Liver cytosolic GSTs were more efficient in bullheads than in bass at catalyzing 1-chloro-2,4-dinitrobenzene-reduced glutathione (CDNB-GSH) conjugation over a broad range of electrophile (CDNB) concentrations, including those representative of environmental exposure. In contrast, largemouth bass maintained higher ambient concentrations of GSH, the nucleophilic cofactor for GST-mediated conjugation, than brown bullheads. Biphasic kinetics for GST-CDNB conjugation under conditions of variable GSH concentration were apparent in Eadie-Hofstee plots of the kinetic data, suggesting the presence of at least two hepatic GST isozymes with markedly different K{sub m} values for GSH in both species. The GST-CDNB reaction rate data obtained under conditions of variable GSH were well fitted (R{sup 2} = 0.999) by the two-enzyme Michaelis-Menten equation. In addition, Western blotting experiments confirmed the presence of two different hepatic GST-like proteins in both largemouth bass and brown bullhead liver. Collectively, these findings indicate that largemouth bass and brown bullhead GSTs catalyze the conjugation of structurally diverse, class-specific GST substrates, and that brown bullheads exhibit higher initial rates of GST activity than largemouth bass. The relatively higher rates of in vitro liver GST activity at the low substrate concentrations relevant to environmental exposure is expected to protect brown bullheads from the toxic effects of sediment-associated electrophilic chemicals. The somewhat lower rates of GST activity in largemouth bass liver compared with brown bullhead liver, however, may be offset by maintenance of higher ambient hepatic GSH concentrations in largemouth bass.

  15. Biaxially textured articles formed by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit; Williams, Robert K.; Kroeger, Donald M.

    2003-10-21T23:59:59.000Z

    A strengthened, biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed, compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: Ni, Ag, Ag--Cu, Ag--Pd, Ni--Cu, Ni--V, Ni--Mo, Ni--Al, Ni--Cr--Al, Ni--W--Al, Ni--V--Al, Ni--Mo--Al, Ni--Cu--Al; and at least one fine metal oxide powder; the article having a grain size which is fine and homogeneous; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

  16. Hanbury-Brown-Twiss analysis and dynamical correlations

    SciTech Connect (OSTI)

    Herrmann, M.; Bertsch, G.F.; Danielewicz, P.

    1993-10-01T23:59:59.000Z

    We test the applicability of the Hanbury-Brown-Twiss theory of bosonic enhancement for the analysis of heavy ion reactions. The correlation function is calculated in a solvable model. We find that the analysis in terms of the ratio of like-sign to unlike-sign pairs is more reliable and more stable than in terms of the ratio of pairs to single mesons. We also compare our exact results with the predictions obtained in a classical treatment of the source function, like the one that is used to extract correlation functions from cascade type simulations. In spite of agreement for extreme choices of the parameters of our model, the results of the approximation deviate strongly from the exact correlation function for Physical Noticed choices. We thus call into question the use of classical approximations for the analysis of reactions in which the final state is produced by a cascade of resonance decays.

  17. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, Ival O. (Dayton, OH)

    1995-01-01T23:59:59.000Z

    A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft.

  18. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, I.O.

    1995-12-26T23:59:59.000Z

    A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figs.

  19. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, I.O.

    1994-12-06T23:59:59.000Z

    A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figures.

  20. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, Ival O. (Dayton, OH)

    1994-01-01T23:59:59.000Z

    A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft.

  1. 1 INTRODUCTION The plastic behavior of a certain powder or soil sam-

    E-Print Network [OSTI]

    Luding, Stefan

    1 INTRODUCTION The plastic behavior of a certain powder or soil sam- ple depends on the history in order to in- vestigate the elasto-plastic response of granular ma- terials. An alternative is obtained by the calculation of the interaction forces between parti- cles. This includes, e.g., plastic

  2. Incident spectrum determination for time-of-flight neutron powder diffraction data analysis.

    SciTech Connect (OSTI)

    Hodges, J. P.

    1998-08-27T23:59:59.000Z

    Accurate characterization of the incident neutron spectrum is an important requirement for precise Rietveld analysis of time-of-flight powder neutron diffraction data. Without an accurate incident spectrum the calculated model for the measured relative intensities of individual Bragg reflections will possess systematic errors. We describe a method for obtaining an accurate numerical incident spectrum using data from a transmitted beam monitor.

  3. AN INVESTIGATION OF A THERMOPLASTIC-POWDER METALLURGY PROCESS FOR THE FABRICATION OF POROUS NIOBIUM RODS

    E-Print Network [OSTI]

    Nordin, Dennis R.

    2011-01-01T23:59:59.000Z

    Compositions, Powder Metallurgy, Vol. 8, No. 16, 1965. W.THERMOPLASTIC- POWDER METALLURGY PROCESS FOR THE FABRICATIONTHERMOPLASTIC- POWDER METALLURGY PROCESS FOR THE FABRICATION

  4. Development and Testing of a BI-2212 Textured Powder Conductor

    E-Print Network [OSTI]

    Damborsky, Kyle

    2014-03-10T23:59:59.000Z

    for Praxair powder in a 500 cP epoxy. .................................................................................................................. 23 Fig. 8: Texture vs. time for various epoxy and powder combinations. All data from an 8.9 T applied...

  5. Probing Structural Dynamics with High Spatial and Temporal Resolution Research Team: Nigel Browning, James Evans, Patricia Abellan, Russell Tonkyn

    E-Print Network [OSTI]

    Probing Structural Dynamics with High Spatial and Temporal Resolution Research Team: Nigel Browning of the structural dynamics that occur on the µs-ns timescale We will make use of a unique aberration-corrected dynamic TEM (DTEM), where a photoemission source will enable these time-resolved images to be obtained at

  6. Organizational Chart Michelle H. Brown-Nevers, Ed.D.

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Organizational Chart Michelle H. Brown-Nevers, Ed.D. Associate Vice President Marlene Bruno Manager Assistant Director Mainframe Systems Kate Micklow Assistant Director Administrative Support Stuart Campbell

  7. The Formation of Brown Dwarfs as Ejected Stellar Embryos

    E-Print Network [OSTI]

    Bo Reipurth; Cathie Clarke

    2001-03-01T23:59:59.000Z

    We conjecture that brown dwarfs are substellar objects because they have been ejected from small newborn multiple systems which have decayed in dynamical interactions. In this view, brown dwarfs are stellar embryos for which the star formation process was aborted before the hydrostatic cores could build up enough mass to eventually start hydrogen burning. The disintegration of a small multiple system is a stochastic process, which can be described only in terms of the half-life of the decay. A stellar embryo competes with its siblings in order to accrete infalling matter, and the one that grows slowest is most likely to be ejected. With better luck, a brown dwarf would therefore have become a normal star. This interpretation of brown dwarfs readily explains the rarity of brown dwarfs as companions to normal stars (aka the ``brown dwarf desert''), the absence of wide brown dwarf binaries, and the flattening of the low mass end of the initial mass function. Possible observational tests of this scenario include statistics of brown dwarfs near Class 0 sources, and the kinematics of brown dwarfs in star forming regions while they still retain a kinematic signature of their expulsion. Because the ejection process limits the amount of gas brought along in a disk, it is predicted that substellar equivalents to the classical T Tauri stars should be very rare.

  8. SIS a new SFF method based on powder

    E-Print Network [OSTI]

    Asiabanpour, Bahram - Department of Engineering and Technology, Texas State University

    . This approach, used by SLS and 3D printing, is able to create thin and uniformly dense powder layers. Other

  9. Modelling the mechanical behaviour of pharmaceutical powders during compaction

    E-Print Network [OSTI]

    Elliott, James

    are made of dry powder through a powder compaction process. In the pharmaceutical industry, billionsModelling the mechanical behaviour of pharmaceutical powders during compaction C.-Y. Wua,T, O.M. Ruddyb , A.C. Benthamb , B.C. Hancockc , S.M. Besta , J.A. Elliotta a Pfizer Institute for Pharmaceutical

  10. Thermite powder ignition by localized microwaves Yehuda Meir, Eli Jerby

    E-Print Network [OSTI]

    Jerby, Eli

    - propagating high-temperature synthesis (SHS) for sintering of ceramic composites [14]. The magnetic (H, the microwave energy is supplied locally to the powder. It creates a confined hotspot, and initiates a self-propagating the powder prior to its ignition is simulated theoretically, taking into account the powder's temperature

  11. ORIGINAL RESEARCH Introgression of Brown Norway Chromosome 1 onto the Fawn

    E-Print Network [OSTI]

    Helmstetter, Fred J.

    ORIGINAL RESEARCH Introgression of Brown Norway Chromosome 1 onto the Fawn Hooded Hypertensive (FHH) and Brown Norway (BN) parent strains with a Brown Norway chromosome 1 substitution on the FHH

  12. Light brown apple moth’s arrival in California worries commodity groups

    E-Print Network [OSTI]

    Varela, Lucia G.; Johnson, Marshall W; Strand, Larry; Wilen, Cheryl A; Pickel, Carolyn

    2008-01-01T23:59:59.000Z

    control of light brown apple moth, Epi- phyas postvittana (2007a. Light brown apple moth host list. www.cdfa.ca.gov/p. CDFA. 2007b. Light brown apple moth project: Advisories.

  13. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, I.O.

    1994-02-01T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a PCM material. The silica-PCM mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 2 figures.

  14. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, I.O.

    1993-05-18T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7[times]10[sup [minus]3] to about 7[times]10[sup [minus]2] microns and the p.c.m. must be added to the silica in an amount of 80 wt. % or less p.c.m. per combined weight of silica and p.c.m. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a p.c.m. material. The silica-p.c.m. mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

  15. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, I.O.

    1992-04-21T23:59:59.000Z

    A free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7 [times] 10[sup [minus]3] to about 7 [times] 10[sup [minus]2] microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 9 figs.

  16. Fabricating solid carbon porous electrodes from powders

    DOE Patents [OSTI]

    Kaschmitter, James L. (Pleasanton, CA); Tran, Tri D. (Livermore, CA); Feikert, John H. (Livermore, CA); Mayer, Steven T. (San Leandro, CA)

    1997-01-01T23:59:59.000Z

    Fabrication of conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive dionization, and waste treatment. Electrodes fabricated from low surface area (<50 m.sup.2 /gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon compositives with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to be high surface area carbons, fuel cell electrodes can be produced.

  17. Fabricating solid carbon porous electrodes from powders

    DOE Patents [OSTI]

    Kaschmitter, J.L.; Tran, T.D.; Feikert, J.H.; Mayer, S.T.

    1997-06-10T23:59:59.000Z

    Fabrication is described for conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive deionization, and waste treatment. Electrodes fabricated from low surface area (<50 m{sup 2}/gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon composites with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to high surface area carbons, fuel cell electrodes can be produced. 1 fig.

  18. EPR Investigation of Irradiated Curry Powder

    SciTech Connect (OSTI)

    Duliu, O. G.; Ali, S. I. [University of Bucharest, Department of Atomic and Nuclear Physics, P.O. Box MG-11, 077125 Bucharest (Romania); Georgescu, R. [National Institute for Physics and Nuclear Engineering-Horia Hulubei, P.O. Box MG-6, 077125 Bucharest (Romania)

    2007-04-23T23:59:59.000Z

    Gamma-ray irradiated curry powder, a well priced oriental spice was investigated in order to establish the ability of EPR to detect the presence and time stability of free irradiation free-radicals. Accordingly, curry powder aliquots were irradiated with gradually increasing absorbed doses up to 11.3 kGy. The EPR spectra of all irradiated samples show the presence of al last two different species of free radicals, whose concentration increased monotonously with the absorbed doses. A 100 deg. C isothermal annealing of irradiated samples has shown a differential reduction of amplitude of various components of the initial spectra, but even after 3.6 h of thermal treatment, the remaining amplitude represents no less then 30% of the initial ones. The same peculiarities have been noticed after more than one year storage at room temperature, all of them being very useful in establishing the existence of any previous irradiation treatment.

  19. Dry powder mixes comprising phase change materials

    SciTech Connect (OSTI)

    Salyer, Ival O. (Dayton, OH)

    1992-01-01T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7.times.10.sup.-3 to about 7.times.10.sup.-2 microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

  20. Dry powder mixes comprising phase change materials

    SciTech Connect (OSTI)

    Salyer, Ival O. (Dayton, OH)

    1994-01-01T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a PCM material. The silica-PCM mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

  1. Dry powder mixes comprising phase change materials

    SciTech Connect (OSTI)

    Salyer, Ival O. (Dayton, OH)

    1993-01-01T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7.times.10.sup.-3 to about 7.times.10.sup.-2 microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garmets, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

  2. Dry powder mixes comprising phase change materials

    DOE Patents [OSTI]

    Salyer, Ival O. (Dayton, OH)

    1993-01-01T23:59:59.000Z

    Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7.times.10.sup.-3 to about 7.times.10.sup.-2 microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

  3. Powder River Energy Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine:Plug Power IncPowder River Energy Corporation Place: Sundance,

  4. The reflection of very cold neutrons from diamond powder nanoparticles

    E-Print Network [OSTI]

    V. V. Nesvizhevsky; E. V. Lychagin; A. Yu. Muzychka; A. V. Strelkov; G. Pignol; K. V. Protasov

    2008-05-17T23:59:59.000Z

    We study possibility of efficient reflection of very cold neutrons (VCN) from powders of nanoparticles. In particular, we measured the scattering of VCN at a powder of diamond nanoparticles as a function of powder sample thickness, neutron velocity and scattering angle. We observed extremely intense scattering of VCN even off thin powder samples. This agrees qualitatively with the model of independent nanoparticles at rest. We show that this intense scattering would allow us to use nanoparticle powders very efficiently as the very first reflectors for neutrons with energies within a complete VCN range up to $10^{-4}$ eV.

  5. Abiotic and biotic factors affecting light brown apple moth, Epiphyas postvittana, in California

    E-Print Network [OSTI]

    Buergi, Linda Patricia

    2012-01-01T23:59:59.000Z

    mortality of lightbrown apple moth. In: O’Callaghan, M. (tryoni and the light brown apple moth Epiphyas postvittanaof the light brown apple moth, Epiphyas postvittana (

  6. Biosorption of Trivalent Chromium on the Brown Seaweed Biomass

    E-Print Network [OSTI]

    Volesky, Bohumil

    Biosorption of Trivalent Chromium on the Brown Seaweed Biomass Y E O U N G - S A N G Y U N , D O N brown alga Ecklonia biomass as a model system. Titration of the biomass revealed that it contains that various biosorbents are able to effectively remove chromium (4-11). Some of the biomass types have

  7. Boiler Gold Rush Prof. Johnny Brown (MATH 700)

    E-Print Network [OSTI]

    Brown, Johnny E.

    Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;#12;#12;David McCullough, Jr help Always be prepared #12;Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;

  8. Project-Based Engineering Education at Brown University

    E-Print Network [OSTI]

    in calculation-based, creative design projects, start- ing in their first semester engineering courseProject-Based Engineering Education at Brown University The School of Engineering at Brown. At the same time, students develop strong theoretical foundations in different areas of engineering before

  9. BROWN Y FERNNDEZ, Heliconiini de Venezuela Los Heliconiini (Lepidoptera, Nymphalidae)

    E-Print Network [OSTI]

    Mallet, James

    BROWN Y FERNÁNDEZ, Heliconiini de Venezuela 29 Los Heliconiini (Lepidoptera, Nymphalidae) de Venezuela KEITH S. BROWN, JR.* Y F. FERNÁNDEZ Y�PEZ** RESUMEN Se ilustran y presentan datos sobre variación, distribución y biología de las 42 especies y 88 subespecies de Heliconiini conocidas de Venezuela, con

  10. December 2013 EA Report Brown Bagger 1 Train the Trainer,

    E-Print Network [OSTI]

    Kim, Duck O.

    December 2013 EA Report Brown Bagger 1 Brown Bagger Train the Trainer, before Training Others. In truth, the secret to successful training is to train the trainers FIRST...before they train others. There is an entire skill set that needs to belong to a person conducting a given training, which includes knowing

  11. Silicon nitride/silicon carbide composite densified materials prepared using composite powders

    DOE Patents [OSTI]

    Dunmead, S.D.; Weimer, A.W.; Carroll, D.F.; Eisman, G.A.; Cochran, G.A.; Susnitzky, D.W.; Beaman, D.R.; Nilsen, K.J.

    1997-07-01T23:59:59.000Z

    Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.

  12. Russell Brown: Department of Mathematics, University of Kentucky, Lexington, Kentucky 40506--0027, brown@ms.uky.edu

    E-Print Network [OSTI]

    Kentucky, University of

    Russell Brown: Department of Mathematics, University of Kentucky, Lexington, Kentucky 40506--0027, brown@ms.uky.edu Zhongwei Shen: Department of Mathematics, University of Kentucky, Lexington, Kentucky 40506--0027, shenz@ms.uky.edu Peter Perry: Department of Mathematics, University of Kentucky, Lexington

  13. Large Bore Powder Gun Qualification (U)

    SciTech Connect (OSTI)

    Rabern, Donald A. [Los Alamos National Laboratory; Valdiviez, Robert [Los Alamos National Laboratory

    2012-04-02T23:59:59.000Z

    A Large Bore Powder Gun (LBPG) is being designed to enable experimentalists to characterize material behavior outside the capabilities of the NNSS JASPER and LANL TA-55 PF-4 guns. The combination of these three guns will create a capability to conduct impact experiments over a wide range of pressures and shock profiles. The Large Bore Powder Gun will be fielded at the Nevada National Security Site (NNSS) U1a Complex. The Complex is nearly 1000 ft below ground with dedicated drifts for testing, instrumentation, and post-shot entombment. To ensure the reliability, safety, and performance of the LBPG, a qualification plan has been established and documented here. Requirements for the LBPG have been established and documented in WE-14-TR-0065 U A, Large Bore Powder Gun Customer Requirements. The document includes the requirements for the physics experiments, the gun and confinement systems, and operations at NNSS. A detailed description of the requirements is established in that document and is referred to and quoted throughout this document. Two Gun and Confinement Systems will be fielded. The Prototype Gun will be used primarily to characterize the gun and confinement performance and be the primary platform for qualification actions. This gun will also be used to investigate and qualify target and diagnostic modifications through the life of the program (U1a.104 Drift). An identical gun, the Physics Gun, will be fielded for confirmatory and Pu experiments (U1a.102D Drift). Both guns will be qualified for operation. The Gun and Confinement System design will be qualified through analysis, inspection, and testing using the Prototype Gun for the majority of process. The Physics Gun will be qualified through inspection and a limited number of qualification tests to ensure performance and behavior equivalent to the Prototype gun. Figure 1.1 shows the partial configuration of U1a and the locations of the Prototype and Physics Gun/Confinement Systems.

  14. Laser production of articles from powders

    DOE Patents [OSTI]

    Lewis, G.K.; Milewski, J.O.; Cremers, D.A.; Nemec, R.B.; Barbe, M.R.

    1998-11-17T23:59:59.000Z

    Method and apparatus for forming articles from materials in particulate form in which the materials are melted by a laser beam and deposited at points along a tool path to form an article of the desired shape and dimensions. Preferably the tool path and other parameters of the deposition process are established using computer-aided design and manufacturing techniques. A controller comprised of a digital computer directs movement of a deposition zone along the tool path and provides control signals to adjust apparatus functions, such as the speed at which a deposition head which delivers the laser beam and powder to the deposition zone moves along the tool path. 20 figs.

  15. Laser production of articles from powders

    DOE Patents [OSTI]

    Lewis, Gary K. (Los Alamos, NM); Milewski, John O. (Santa Fe, NM); Cremers, David A. (Los Alamos, NM); Nemec, Ronald B. (White Rock, NM); Barbe, Michael R. (White Rock, NM)

    1998-01-01T23:59:59.000Z

    Method and apparatus for forming articles from materials in particulate form in which the materials are melted by a laser beam and deposited at points along a tool path to form an article of the desired shape and dimensions. Preferably the tool path and other parameters of the deposition process are established using computer-aided design and manufacturing techniques. A controller comprised of a digital computer directs movement of a deposition zone along the tool path and provides control signals to adjust apparatus functions, such as the speed at which a deposition head which delivers the laser beam and powder to the deposition zone moves along the tool path.

  16. Powder Dropper | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006PhotovoltaicSeptember 22, 2014SocietyJ.Potential(GFA)Powder Dropper

  17. Correlated spectral variability in brown dwarfs

    E-Print Network [OSTI]

    Bailer-Jones, C A L

    2007-01-01T23:59:59.000Z

    Models of brown dwarf atmospheres suggest they exhibit complex physical behaviour. Observations have shown that they are indeed dynamic, displaying small photometric variations over timescales of hours. Here I report results of infrared (0.95-1.64 micron) spectrophotometric monitoring of four field L and T dwarfs spanning timescales of 0.1-5.5 hrs, the goal being to learn more about the physical nature of this variability. Spectra are analysed differentially with respect to a simultaneously observed reference source in order to remove Earth-atmospheric variations. The variability amplitude detected is typically 2-10%, depending on the source and wavelength. I analyse the data for correlated variations between spectral indices. This approach is more robust than single band or chisq analyses, because it does not assume an amplitude for the (often uncertain) noise level (although the significance test still assumes a shape for the noise power spectrum). Three of the four targets show significant evidence for cor...

  18. Toxins not neutralized by brown snake antivenom

    SciTech Connect (OSTI)

    Judge, Roopwant K. [Molecular Genetics and Evolution Group, Research School of Biological Sciences, Australian National University, Canberra 2601, ACT (Australia); Henry, Peter J. [School of Medicine and Pharmacology, University of Western Australia, Crawley 6009, Western Australia (Australia); Mirtschin, Peter [Venom Supplies, Tanunda 5352, South Australia (Australia); Jelinek, George [School of Primary, Aboriginal and Rural Health Care, QEII Medical Centre, Western Australia (Australia); Wilce, Jacqueline A. [Department of Biochemistry and Molecular Biology, Monash University, Clayton 3800, VIC Victoria (Australia)]. E-mail: Jackie.Wilce@med.monash.edu.au

    2006-06-01T23:59:59.000Z

    The Australian snakes of the genus Pseudonaja (dugite, gwardar and common brown) account for the majority of snake bite related deaths in Australia. Without antivenom treatment, the risk of mortality is significant. There is an accumulating body of evidence to suggest that the efficacy of the antivenom is limited. The current study investigates the protein constituents recognized by the antivenom using 2-DE, immuno-blot techniques and rat tracheal organ bath assays. The 2-DE profiles for all three snake venoms were similar, with major species visualized at 78-132 kDa, 32-45 kDa and 6-15 kDa. Proteins characterized by LC-MS/MS revealed a coagulant toxin ({approx}42 kDa) and coagulant peptide ({approx}6 kDa), as well as two PLA{sub 2} ({approx}14 kDa). Peptides isolated from {approx}78 kDa and 15-32 kDa protein components showed no similarity to known protein sequences. Protein recognition by the antivenom occurred predominantly for the higher molecular weight components with little recognition of 6-32 kDa MW species. The ability of antivenom to neutralize venom activity was also investigated using rat tracheal organ bath assays. The venoms of Pseudonaja affinis affinis and Pseudonaja nuchalis incited a sustained, significant contraction of the trachea. These contractions were attributed to PLA{sub 2} enzymatic activity as pre-treatment with the PLA{sub 2} inhibitor 4-BPB attenuated the venom-induced contractions. The venom of Pseudonaja textilis incited tracheal contractility through a non-PLA{sub 2} enzymatic activity. Neither activity was attenuated by the antivenom treatment. These results represent the first proteomic investigation of the venoms from the snakes of the genus Pseudonaja, revealing a possible limitation of the brown snake antivenom in binding to the low MW protein components.

  19. Kinematics of stars and brown dwarfs at birth

    E-Print Network [OSTI]

    E. Moraux C. Clarke

    2004-10-01T23:59:59.000Z

    We use numerical N-body simulations in order to test whether the kinematics of stars and brown dwarfs at birth depend on mass. In particular we examine how initial variations in velocity dispersion can affect the spatial distribution of stellar and substellar objects in clusters. We use 'toy' N-body models of a Pleiades-like cluster in which brown dwarfs have their own velocity dispersion sigma_(V_BD) which is k times larger than the stellar one. We find that in order to match the broad agreement between the brown dwarf fraction in the field and in the Pleiades, the velocity dispersion of brown dwarfs at birth has to be less than twice the stellar velocity dispersion, i.e. cannot exceed a few km/s in the Pleiades cluster. In order to discern more subtle differences between the kinematics of brown dwarfs and stars at birth, our simulations show that we need to look at clusters that are much less dynamically evolved than the Pleiades. One might especially seek evidence of high velocity brown dwarfs at birth by examining spatial distribution of stars and brown darfs in clusters that are about a crossing timescale old.

  20. Method for preparing metal powder, device for preparing metal powder, method for processing spent nuclear fuel

    DOE Patents [OSTI]

    Park, Jong-Hee (Clarendon Hills, IL)

    2011-11-29T23:59:59.000Z

    A method for producing metal powder is provided the comprising supplying a molten bath containing a reducing agent, contacting a metal oxide with the molten bath for a time and at a temperature sufficient to reduce the metal in the metal oxide to elemental metal and produce free oxygen; and isolating the elemental metal from the molten bath.

  1. Fabrication of ultrafine tungsten-based alloy powders by novel soda reduction process

    SciTech Connect (OSTI)

    Lee, Dong-Won [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of)] [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of); Turaev, Farkhod, E-mail: farkhod_2002@yahoo.com [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of)] [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of); Kim, Ju-Hyeong [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of)] [Powder Technology Research Group, Korea Institute of Materials Science (KIMS), Changwon, Kyungnam, 641-010 (Korea, Republic of); Yang, Mingchuan [W-base Heavy Alloy Research Group, Institute of Metal Research (IMR), 72 Wenhua-road, Shenyang, 110016 (China)] [W-base Heavy Alloy Research Group, Institute of Metal Research (IMR), 72 Wenhua-road, Shenyang, 110016 (China)

    2010-03-15T23:59:59.000Z

    A novel reduction method has been developed to fabricate ultrafine tungsten heavy alloy powders, with ammonium metatungstate (AMT), iron(II) chloride tetrahydrate (FeCl{sub 2}.4H{sub 2}O), nickel(II) chloride hexahydrate (NiCl{sub 2}.6H{sub 2}O) as source materials and sodium tungstate dihydrate (Na{sub 2}WO{sub 4}.2H{sub 2}O) as a reductant. In the preparation of mixtures the amounts of the source components were chosen so as to obtain alloy of 93W-5Ni-2Fe composition (wt.%). The obtained powders were characterized by X-ray diffraction, XPS, field-emission scanning microscope (FESEM), and chemical composition was analyzed by EDX.

  2. Amorphous powders of Al-Hf prepared by mechanical alloying

    SciTech Connect (OSTI)

    Schwarz, R.B.; Hannigan, J.W.; Sheinberg, H.; Tiainen, T.

    1988-01-01T23:59:59.000Z

    We synthesized amorphous Al/sub 50/Hf/sub 50/ alloy powder by mechanically alloying an equimolar mixture of crystalline powders of Al and Hf using hexane as a dispersant. We characterized the powder as a function of mechanical-alloying time by scanning electron microscopy, x-ray diffraction, and differential scanning calorimetry. Amorphous Al/sub 50/Hf/sub 50/ powder heated at 10 K s/sup /minus/1/ crystallizes polymorphously at 1003 K into orthorhombic AlHf (CrB-type structure). During mechanical alloying, some hexane decomposes and hydrogen and carbon are incorporated into the amorphous alloy powder. The hydrogen can be removed by annealing the powder by hot pressing at a temperature approximately 30 K below the crystallization temperature. The amorphous compacts have a diamond pyramidal hardness of 1025 DPH. 24 refs., 7 figs., 1 tab.

  3. The investigation of die-pressing and sintering behavior of ITP CP-Ti and Ti-6Al-4V powders

    SciTech Connect (OSTI)

    Chen, Wei [ORNL; Yamamoto, Yukinori [ORNL; Peter, William H [ORNL; Clark, Michael B [ORNL; Nunn, Stephen D [ORNL; Kiggans, Jim [ORNL; Muth, Thomas R [ORNL; Blue, Craig A [ORNL; Williams, James C [Ohio State University; Fuller, Brian [International Titanium Powder; Akhtar, Kamal [International Titanium Powder

    2012-01-01T23:59:59.000Z

    This paper investigated the die-pressing and sintering behavior of the low-cost CP-Ti and Ti-6Al- 4V powders made by the Armstrong Process . The Armstrong powders have an irregular coral like, dendritic morphology, with a dendrite size of approximately 2-5 m. As-received as well as milled powders were uniaxially pressed at designated pressures up to 690 MPa to form disk samples with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density pressure relationship, and powder compaction parameters were obtained. The Armstrong Ti-64 powder exhibited a significantly higher sinterability than the CP-Ti powder. This was explained to be due to the higher diffusivity of V at the sintering temperature. The Ti-64 samples with a green density of 71.0% increased to 99.6% after sintering at 1300oC for 1 hour. An ex-situ technique was used to track the powder morphology change before and after sintering.

  4. Numerical Results on Low Mass Star and Brown Dwarf Multiplicity

    E-Print Network [OSTI]

    Eduardo Delgado-Donate; Cathie Clarke

    2004-12-17T23:59:59.000Z

    We have undertaken a series of hydrodynamic + N-body simulations in order to explore the properties of young stars. Our results suggest that the IMF may be sensitive to environment in its substellar region, with more brown dwarfs being formed where clusters are denser or more compact. We find that multiple stars are a natural outcome of collapsing turbulent flows, with a high incidence of N > 2 multiples. We find a positive correlation of multiplicity with primary mass but a companion frequency that decreases with age. Binary brown dwarfs are rarely formed, in conflict with observations. Brown dwarfs as companions are predominantly found orbiting binaries or triples at large separations.

  5. NanoComposite Stainless Steel Powder Technologies

    SciTech Connect (OSTI)

    DeHoff, R.; Glasgow, C. (MesoCoat, Inc.)

    2012-07-25T23:59:59.000Z

    Oak Ridge National Laboratory has been investigating a new class of Fe-based amorphous material stemming from a DARPA, Defense Advanced Research Projects Agency initiative in structural amorphous metals. Further engineering of the original SAM materials such as chemistry modifications and manufacturing processes, has led to the development of a class of Fe based amorphous materials that upon processing, devitrify into a nearly homogeneous distribution of nano sized complex metal carbides and borides. The powder material is produced through the gas atomization process and subsequently utilized by several methods; laser fusing as a coating to existing components or bulk consolidated into new components through various powder metallurgy techniques (vacuum hot pressing, Dynaforge, and hot isostatic pressing). The unique fine scale distribution of microstructural features yields a material with high hardness and wear resistance compared to material produced through conventional processing techniques such as casting while maintaining adequate fracture toughness. Several compositions have been examined including those specifically designed for high hardness and wear resistance and a composition specifically tailored to devitrify into an austenitic matrix (similar to a stainless steel) which poses improved corrosion behavior.

  6. Energy Input, Carbon Intensity, and Cost for Ethanol Produced from Brown Seaweed

    E-Print Network [OSTI]

    Victoria, University of

    Energy Input, Carbon Intensity, and Cost for Ethanol Produced from Brown Seaweed by Aaron, Carbon Intensity, and Cost for Ethanol Produced from Brown Seaweed by Aaron Philippsen B.Eng, University of Mechanical Engineering) Co-Supervisor Brown macroalgae or brown seaweed is a promising source of ethanol

  7. Synthesis of nanophase W and WC powders from ammonium metatungstate

    SciTech Connect (OSTI)

    Gao, L.; Kear, B.H. [Rutgers, The State Univ. of New Jersey, Piscataway, NJ (United States). Dept. of Ceramic Engineering

    1996-06-01T23:59:59.000Z

    Nanophase {alpha}-W powder has been synthesized by reductive decomposition of ammonium metatungstate (AMT) at low temperatures (< 600 C). The formation of {beta}-W, which is the usual product of low temperature reduction of tungsten oxides, is avoided. Thus, it has been possible to lower the carburization temperature of W to WC to about 575 C. Nanophase WC powder (< 10 nm grain size) is produced by the low temperature carburization of nanophase {alpha}-W powder.

  8. Characterizations of WC-10Co nanocomposite powders and subsequently sinterhip sintered cemented carbide

    SciTech Connect (OSTI)

    Shi, X.L. [State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122Luoshi Road, Wuhan 430070 (China)]. E-mail: sxl071932@126.com; Shao, G.Q. [State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122Luoshi Road, Wuhan 430070 (China); Duan, X.L. [State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122Luoshi Road, Wuhan 430070 (China); Xiong, Z. [State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122Luoshi Road, Wuhan 430070 (China); Yang, H. [State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122Luoshi Road, Wuhan 430070 (China)

    2006-12-15T23:59:59.000Z

    Ultrafine WC-Co cemented carbides, combining high hardness and high toughness, are expected to find broad applications. In this study, WC-10Co-0.4VC-0.4Cr{sub 3}C{sub 2} (wt.%) nanocomposite powders, whose average grain size was about 30 nm, were fabricated by spray pyrolysis-continuous reduction and carbonization technology. The as-prepared nanocomposite powders were characterized and analyzed by chemical methods, scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET analysis and atomic force microscopy (AFM). Furthermore, 'sinterhip' was used in the sintering process, by which ultrafine WC-10Co cemented carbides with an average grain size of 240 nm were prepared. The material exhibited high Rockwell A hardness of HRA 92.8, Vickers hardness HV{sub 1} 1918, and transverse rapture strength (TRS) of 3780 MPa. The homogeneously dispersed grain growth inhibitors such as VC, Cr{sub 3}C{sub 2} in nanocomposite powder and the special nonmetal-metal nanocomposite structure of WC-10Co nanocomposite powder played very important roles in obtaining ultrafine WC-10Co cemented carbide with the desired properties and microstructure. There was an abundance of triple junctions in the ultrafine WC-10Co cemented carbide; these triple junctions endowed the sintered specimen with high mechanical properties.

  9. Controlled powder morphology experiments in megabar 304 stainless steel compaction

    SciTech Connect (OSTI)

    Staudhammer, K.P.; Johnson, K.A.

    1985-01-01T23:59:59.000Z

    Experiments with controlled morphology including shape, size, and size distribution were made on 304L stainless steel powders. These experiments involved not only the powder variables but pressure variables of 0.08 to 1.0 Mbar. Also included are measured container strain on the material ranging from 1.5% to 26%. Using a new strain controllable design it was possible to seperate and control, independently, strain and pressure. Results indicate that powder morphology, size distribution, packing density are among the pertinent parameters in predicting compaction of these powders.

  10. Iowa Powder Atomization Technologies, Inc. | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    complex parts very efficiently. Metal powders are mixed with a low melting plastic and injected into reusable molds, the plastic is then removed and the remaining...

  11. Forming gas treatment of lithium ion battery anode graphite powders

    DOE Patents [OSTI]

    Contescu, Cristian Ion; Gallego, Nidia C; Howe, Jane Y; Meyer, III, Harry M; Payzant, Edward Andrew; Wood, III, David L; Yoon, Sang Young

    2014-09-16T23:59:59.000Z

    The invention provides a method of making a battery anode in which a quantity of graphite powder is provided. The temperature of the graphite powder is raised from a starting temperature to a first temperature between 1000 and 2000.degree. C. during a first heating period. The graphite powder is then cooled to a final temperature during a cool down period. The graphite powder is contacted with a forming gas during at least one of the first heating period and the cool down period. The forming gas includes H.sub.2 and an inert gas.

  12. Neutron Powder Diffraction and Molecular Simulation Study of...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Simulation Study of the Structural Evolution of Ammonia Borane from 15 to 340 K. Neutron Powder Diffraction and Molecular Simulation Study of the Structural Evolution of...

  13. Joining of parts via magnetic heating of metal aluminum powders

    DOE Patents [OSTI]

    Baker, Ian

    2013-05-21T23:59:59.000Z

    A method of joining at least two parts includes steps of dispersing a joining material comprising a multi-phase magnetic metal-aluminum powder at an interface between the at least two parts to be joined and applying an alternating magnetic field (AMF). The AMF has a magnetic field strength and frequency suitable for inducing magnetic hysteresis losses in the metal-aluminum powder and is applied for a period that raises temperature of the metal-aluminum powder to an exothermic transformation temperature. At the exothermic transformation temperature, the metal-aluminum powder melts and resolidifies as a metal aluminide solid having a non-magnetic configuration.

  14. Process for synthesizing compounds from elemental powders and product

    DOE Patents [OSTI]

    Rabin, Barry H. (Idaho Falls, ID); Wright, Richard N. (Idaho Falls, ID)

    1993-01-01T23:59:59.000Z

    A process for synthesizing intermetallic compounds from elemental powders. The elemental powders are initially combined in a ratio which approximates the stoichiometric composition of the intermetallic compound. The mixed powders are then formed into a compact which is heat treated at a controlled rate of heating such that an exothermic reaction between the elements is initiated. The heat treatment may be performed under controlled conditions ranging from a vacuum (pressureless sintering) to compression (hot pressing) to produce a desired densification of the intermetallic compound. In a preferred form of the invention, elemental powders of Fe and Al are combined to form aluminide compounds of Fe.sub.3 Al and FeAl.

  15. COAL QUALITY AND GEOCHEMISTRY, POWDER RIVER BASIN, WYOMING AND MONTANA

    E-Print Network [OSTI]

    in the Powder River Basin in Wyoming and Montana (fig. PQ-1) is considered to be "clean coal." For the location

  16. Edmund G. Brown Jr. LIFE HISTORY PARAMETERS OF

    E-Print Network [OSTI]

    History Parameters of Common Marine Fish Subject to Entrainment. California Energy Commission, PIER · Renewable Energy Technologies · Transportation Life History Parameters of Common Southern California MEdmund G. Brown Jr. Governor LIFE HISTORY PARAMETERS OF COMMON SOUTHERN CALIFORNIA MARINE FISHES

  17. Molecular insights into the niche of harmful brown tides

    E-Print Network [OSTI]

    Wurch, Louie L. (Louie Lorne)

    2011-01-01T23:59:59.000Z

    Recurrent brown tide blooms caused by the harmful alga Alureococcus anophagefferens have decimated coastal ecosystems and shellfisheries along the Eastern U.S and South Africa. The exact mechanisms controlling bloom ...

  18. Chemical Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    environments. Courses in mathematics, chemistry, physics, and computational engineering provide the background120 Chemical Engineering The George R. Brown School of Engineering Chair Kyriacos Zygourakis to create a focus area in one of the following four disciplines: bioengineering, environmental engineering

  19. Genome sequence of the Brown Norway rat yields insights into

    E-Print Network [OSTI]

    Pachter, Lior

    Genome sequence of the Brown Norway rat yields insights into mammalian evolution Rat Genome Norway (BN) rat strain. The sequence represents a high-quality `draft' covering over 90% of the genome

  20. Quiescent X-ray emission from an evolved brown dwarf ?

    E-Print Network [OSTI]

    B. Stelzer

    2004-09-27T23:59:59.000Z

    I report on the X-ray detection of Gl569Bab. During a 25ksec Chandra observation the binary brown dwarf is for the first time spatially separated in X-rays from the flare star primary Gl569A. Companionship to Gl569A constrains the age of the brown dwarf pair to ~300-800 Myr. The observation presented here is only the second X-ray detection of an evolved brown dwarf. About half of the observing time is dominated by a large flare on Gl569Bab, the remainder is characterized by weak and non-variable emission just above the detection limit. This emission -- if not related to the afterglow of the flare -- represents the first detection of a quiescent corona on a brown dwarf, representing an important piece in the puzzle of dynamos in the sub-stellar regime.

  1. Edmund G. Brown, Jr. PIER INDUSTRIAL, AGRICULTURAL, AND

    E-Print Network [OSTI]

    , petroleum refining, natural gas, beverage industry, water and wastewater, energy efficiency, industrial natural gas efficiency, electronics, Public Interest Energy R Edmund G. Brown, Jr. Governor PIER INDUSTRIAL, AGRICULTURAL, AND WATER ENERGY EFFICIENCY

  2. Intern experience at Brown & Root, Inc.: an internship report

    E-Print Network [OSTI]

    Kibbee, Stephen Edward, 1951-

    2013-03-13T23:59:59.000Z

    . The internship report outlines the process by which Brown & Root carries out the design and construction of offshore oil and gas production facilities ... A supplementary presentation of the author's previous experience at an oil company permits...

  3. atmospheric brown cloud: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    I.; Burrows, Adam 2003-01-01 3 II. Black Carbon, Atmospheric Brown Clouds and Greenhouse Effect: Background CiteSeer Summary: satellite. The optical depth is a good index for...

  4. atmospheric brown clouds: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    I.; Burrows, Adam 2003-01-01 3 II. Black Carbon, Atmospheric Brown Clouds and Greenhouse Effect: Background CiteSeer Summary: satellite. The optical depth is a good index for...

  5. Process for preparing titanium nitride powder

    DOE Patents [OSTI]

    Bamberger, C.E.

    1988-06-17T23:59:59.000Z

    A process for making titanium nitride powder by reaction of titanium phosphates with sodium cyanide. The process of this invention may comprise mixing one or more phosphates of Ti with a cyanide salt in the absence of oxygen and heating to a temperature sufficient to cause reaction to occur. In the preferred embodiment the ratio of cyanide salt to Ti should be at least 2 which results in the major Ti-containing product being TiN rather than sodium titanium phosphate byproducts. The process is an improvement over prior processes since the byproducts are water soluble salts of sodium which can easily be removed from the preferred TiN product by washing. 2 tabs.

  6. Gaseous Decomposition Products of Safety Powders

    E-Print Network [OSTI]

    Cubbison, C.E.

    1912-01-01T23:59:59.000Z

    19.6 Volume o f a i r added 70.8 T o t a l vo lume 90 .4 Volume a f t e r e x p l o s i o n — 74.4 C o n t r a c t i o n 16.0 R e s i d u e a f t e r a b s o r p t i o n o f c a r b o n d i o x i d e 68.8 74.4 6 8 . 8 = 5 .6 . Oxygen p r e s e... DECOMPOSITION PRODUCTS OF SAFETY POWDERS. THESIS SUBMITTED FOR THE DEGREE OF BACHELOR OF SCIENCE I I THE DEPARTMENT OF CHEMICAL BHGUEBRING AT THE UNIVERSITY OF KANSAS. BY C.E.CUBBISOH 1912. RD01D7 MaDSfl COHTEHTS. * * * * Pago * P r e f a c e 6...

  7. Sinterable powders from laser driven reactions : final report

    E-Print Network [OSTI]

    Haggerty, John Scarseth

    1981-01-01T23:59:59.000Z

    Extremely fine, uniform ceramic powders have been synthesized from Sil4 NH3 and C2H4 gas phase reactants that are heated by absorbing optical energy emitted from a C02 laser. Resulting Si, Si3N4 and SiC powders have been ...

  8. The Analysis of Interference Effects in the Sum Frequency Spectra of Water Interfaces Mac G. Brown, Elizabeth A. Raymond, Heather C. Allen, Lawrence F. Scatena, and

    E-Print Network [OSTI]

    Richmond, Geraldine L.

    The Analysis of Interference Effects in the Sum Frequency Spectra of Water Interfaces Mac G. Brown, Elizabeth A. Raymond, Heather C. Allen, Lawrence F. Scatena, and Geraldine L. Richmond* Department involve the surface of liquid water. Unfortunately, obtaining spectral fits to vibrational spectra

  9. Multi-scale current activated tip-based sintering of powder-based materials

    E-Print Network [OSTI]

    El Desouky, Ahmed Mohamed

    2012-01-01T23:59:59.000Z

    Japan Society for powder Metallurgy 9 B. Srinivasaro, K. Oh-PM sintering method. Powder Metallurgy 45(4):322-328 47 Z.A.Japan Society of Powder Metallurgy 57(10): 654-659 106 M.

  10. Homogeneous Precipitation of Nickel Hydroxide Powders

    SciTech Connect (OSTI)

    Bora Mavis

    2003-12-12T23:59:59.000Z

    Precipitation and characterization of nickel hydroxide powders were investigated. A comprehensive precipitation model incorporating the metal ion hydrolysis, complexation and precipitation reactions was developed for the production of the powders with urea precipitation method. Model predictions on Ni{sup 2+} precipitation rate were confirmed with precipitation experiments carried out at 90 C. Experimental data and model predictions were in remarkable agreement. Uncertainty in the solubility product data of nickel hydroxides was found to be the large contributor to the error. There were demonstrable compositional variations across the particle cross-sections and the growth mechanism was determined to be the aggregation of primary crystallites. This implied that there is a change in the intercalate chemistry of the primary crystallites with digestion time. Predicted changes in the concentrations of simple and complex ions in the solution support the proposed mechanism. The comprehensive set of hydrolysis reactions used in the model described above allows the investigation of other systems provided that accurate reaction constants are available. the fact that transition metal ions like Ni{sup 2+} form strong complexes with ammonia presents a challenge in the full recovery of the Ni{sup 2+}. On the other hand, presence of Al{sup 3+} facilitates the complete precipitation of Ni{sup 2+} in about 3 hours of digestion. A challenge in their predictive modeling studies had been the fact that simultaneous incorporation of more than one metal ion necessitates a different approach than just using the equilibrium constants of hydrolysis, complexation and precipitation reactions. Another limitation of using equilibrium constants is that the nucleation stage of digestion, which is controlled mainly by kinetics, is not fully justified. A new program released by IBM Almaden Research Center (Chemical Kinetics Simulator{trademark}, Version 1.01) lets the user change the order of kinetic components of a reaction which was set to stoichiometric constant with which the species appear in the reaction in KINSIM by default. For instance, in the case of LDH precipitation, the new program allows to change the order of species in the reactions associated with Al{sup 3+} and let the Ni{sup 2+} reactions take over. This could be carried on iteratively until a good fit between the experimental data and the predictions were observed. However for such studies availability of accurate equilibrium constants (especially for the solubility products for the solid phase) is a prerequisite.

  11. Correlated spectral variability in brown dwarfs

    E-Print Network [OSTI]

    C. A. L. Bailer-Jones

    2007-11-28T23:59:59.000Z

    Models of brown dwarf atmospheres suggest they exhibit complex physical behaviour. Observations have shown that they are indeed dynamic, displaying small photometric variations over timescales of hours. Here I report results of infrared (0.95-1.64 micron) spectrophotometric monitoring of four field L and T dwarfs spanning timescales of 0.1-5.5 hrs, the goal being to learn more about the physical nature of this variability. Spectra are analysed differentially with respect to a simultaneously observed reference source in order to remove Earth-atmospheric variations. The variability amplitude detected is typically 2-10%, depending on the source and wavelength. I analyse the data for correlated variations between spectral indices. This approach is more robust than single band or chisq analyses, because it does not assume an amplitude for the (often uncertain) noise level (although the significance test still assumes a shape for the noise power spectrum). Three of the four targets show significant evidence for correlated variability. Some of this can be associated with specific features including Fe, FeH, VO and KI, and there is good evidence for intrinsic variability in water and possibly also methan. Yet some of this variability covers a broader spectral range which would be consistent with dust opacity variations. The underlying common cause is plausibly localized temperature or composition fluctuations caused by convection. Looking at the high signal-to-noise ratio stacked spectra we see many previously identified spectral features of L and T dwarfs, such as KI, NaI, FeH, water and methane. In particular we may have detected methane absorption at 1.3-1.4 micron in the L5 dwarf SDSS 0539-0059.

  12. amorphous ball-milled powders: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    , and thermal properties of Nafion powders prepared by high-energy ball milling of pellets is given. Nafion powders prepared in this manner exhibit thermal behavior similar...

  13. E-Print Network 3.0 - aluminum powder mixtures Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    4210: Manufacturing Processes and Engineering Summary: .S. Colton GIT 2009 17 12;Compacting Pressures for Various Metal Powders P Metal Pressure (MPa) Aluminum... Metal Powder...

  14. Batch sorption of divalent metal ions onto brown coal

    SciTech Connect (OSTI)

    Pehlivan, E.; Gode, F. [University of Selcuk, Konya (Turkey). Faculty of Engineering & Architecture

    2006-12-15T23:59:59.000Z

    Brown coal, a relatively abundant and inexpensive material is currently being investigated as an adsorbent to remove some contaminants from aqueous solution. The adsorption of some heavy metals from aqueous solutions on the brown coals was studied as a function of pH, contact time, adsorbent dosage and concentration of metal solutions. A carboxyl, phenolic hydroxyl, and metoxyl functional group present on the coal surface was the adsorption site to remove metal ions from solution by means of ion exchange and hydrogen bonding. Effective removal of heavy metals was achieved at pH values of 4.0-5.0. The experimental data have been analyzed using the Langmuir isotherm models. Under optimized conditions, the percentage of metal removal by brown coal adsorption was over 80%.

  15. Characterization of Cu{sub 6}Sn{sub 5} intermetallic powders produced by water atomization and powder heat treatment

    SciTech Connect (OSTI)

    Tongsri, Ruangdaj, E-mail: ruangdt@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Yotkaew, Thanyaporn, E-mail: thanyy@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Krataitong, Rungtip, E-mail: rungtipk@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Wila, Pongsak, E-mail: pongsakw@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Sir-on, Autcharaporn, E-mail: autchars@mtec.or.th [Materials Characterization Research Unit (MCRU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Muthitamongkol, Pennapa, E-mail: pennapm@mtec.or.th [Materials Characterization Research Unit (MCRU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Tosangthum, Nattaya, E-mail: nattayt@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand)

    2013-12-15T23:59:59.000Z

    Since the Cu{sub 6}Sn{sub 5} intermetallic shows its importance in industrial applications, the Cu{sub 6}Sn{sub 5} intermetallic-containing powders, produced by a powder processing route with a high production rate, were characterized. The route consisted of water atomization of an alloy melt (Cu–61 wt.% Sn) and subsequent heat treatment of the water-atomized powders. Characterization of the water-atomized powders and their heated forms was conducted by using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Fine water-atomized powder microstructures consisted of primary hexagonal ?-Cu{sub 6.25}Sn{sub 5} dendrites coexisting with interdendritic ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic. Solidification of fine melt droplets was governed by surface nucleation and growth of the primary hexagonal ?-Cu{sub 6.25}Sn{sub 5} dendrites followed by ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic solidification of the remnant liquid. In coarse melt droplets, nucleation and growth of primary ?-Cu{sub 3}Sn dendrites were followed by peritectic reaction (?-Cu{sub 3}Sn + liquid ? ?-Cu{sub 6.25}Sn{sub 5}) or direct crystallization of ?-Cu{sub 6.25}Sn{sub 5} phase from the undercooled melt. Finally, the ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic solidification of the remnant liquid occurred. Heating of the water-atomized powders at different temperatures resulted in microstructural homogenization. The water-atomized powders with mixed phases were transformed to powders with single monoclinic ?-Cu{sub 6}Sn{sub 5} phase. - Highlights: • The Cu{sub 6}Sn{sub 5} intermetallic powder production route was proposed. • Single phase Cu{sub 6}Sn{sub 5} powders could be by water atomization and heating. • Water-atomized Cu–Sn powders contained mixed Cu–Sn phases. • Solidification and heat treatment of water-atomized Cu–Sn powders are explained.

  16. Stabilized Lithium Metal Powder, Enabling Material and Revolutionary...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    -- Washington D.C. es011yakovleva2010o.pdf More Documents & Publications Stabilized Lithium Metal Powder, Enabling Material and Revolutionary Technology for High Energy Li-ion...

  17. Apparatus for making environmentally stable reactive alloy powders

    DOE Patents [OSTI]

    Anderson, I.E.; Lograsso, B.K.; Terpstra, R.L.

    1996-12-31T23:59:59.000Z

    Apparatus and method are disclosed for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloyants needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment. 7 figs.

  18. aluminum powder part: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    nuclear applications. Two specific uses for which this powder is intended are Al2O3 pellets and Al2O 3 ? B4C composite pellets for use as thermal insulator or burnable neutron...

  19. aluminum germanium powders: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    nuclear applications. Two specific uses for which this powder is intended are Al2O3 pellets and Al2O 3 ? B4C composite pellets for use as thermal insulator or burnable neutron...

  20. Environmentally stable reactive alloy powders and method of making same

    DOE Patents [OSTI]

    Anderson, I.E.; Lograsso, B.K.; Terpstra, R.L.

    1998-09-22T23:59:59.000Z

    Apparatus and method are disclosed for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloys needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment. 7 figs.

  1. Process for synthesizing compounds from elemental powders and product

    DOE Patents [OSTI]

    Rabin, B.H.; Wright, R.N.

    1993-12-14T23:59:59.000Z

    A process for synthesizing intermetallic compounds from elemental powders is described. The elemental powders are initially combined in a ratio which approximates the stoichiometric composition of the intermetallic compound. The mixed powders are then formed into a compact which is heat treated at a controlled rate of heating such that an exothermic reaction between the elements is initiated. The heat treatment may be performed under controlled conditions ranging from a vacuum (pressureless sintering) to compression (hot pressing) to produce a desired densification of the intermetallic compound. In a preferred form of the invention, elemental powders of Fe and Al are combined to form aluminide compounds of Fe[sub 3] Al and FeAl. 25 figures.

  2. alloyed powders kermetnye: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  3. alloy powder fabricated: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  4. alloy powders produced: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  5. alloyed powders hyperfine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  6. alloy powder prepared: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  7. 2001 7: 1566-1577RNA J. T. Brown and A. W. Johnson

    E-Print Network [OSTI]

    Johnson, Arlen

    2001 7: 1566-1577RNA J. T. Brown and A. W. Johnson and phenocopies a ski mutant cellsenhances cells and phenocopies a ski mutant JUSTIN T. BROWN and ARLEN W. JOHNSON Department of Molecular Genetics

  8. Enhancement of green luminescence of ZnO powders by annealing with carbon black

    SciTech Connect (OSTI)

    Hu Yi [Department of Materials Engineering, Tatung University, Taipei, Taiwan (China)], E-mail: huyi@ttu.edu.tw; Chen, H.-J. [Department of Materials Engineering, Tatung University, Taipei, Taiwan (China)

    2008-08-04T23:59:59.000Z

    This paper reports the characterization of nanocrystalline ZnO powders synthesized by a precipitation method and annealed with carbon black. The X-ray diffraction (XRD) and Fourier Transformed Infrared (FT-IR) results revealed that the synthesized ZnO powder has the wurtzite structure with absorbed CO{sub 3}{sup -} species on the surface of the ZnO particles. Singly ionized oxygen vacancy (V{sub O}{sup +}) and CO{sub 3}{sup -} species were also perceived from electron paramagnetic resonance (EPR) analysis. The intensity of the EPR signals of CO{sub 3}{sup -} species increased as the amount of carbon increased whereas that of V{sub O}{sup +} did not vary significantly. A green emission at 528 nm for the powders annealed with carbon was observed and a good correlation between the intensity of green emission and the intensity of EPR signals of CO{sub 3}{sup -} was obtained Experimental results suggest that the formation of the free carriers has significant effect on the intensity of the green emission. The mechanism responsible for the green emission enhancement based on the relevance of the observations is discussed.

  9. Neutron detectors comprising ultra-thin layers of boron powder

    SciTech Connect (OSTI)

    Wang, Zhehul; Morris, Christopher

    2013-07-23T23:59:59.000Z

    High-efficiency neutron detector substrate assemblies comprising a first conductive substrate, wherein a first side of the substrate is in direct contact with a first layer of a powder material having a thickness of from about 50 nm to about 250 nm and comprising .sup.10boron, .sup.10boron carbide or combinations thereof, and wherein a conductive material is in proximity to the first layer of powder material; and processes of making said neutron detector substrate assemblies.

  10. Consolidation of aluminum 6061 powder by equal channel angular extrusion

    E-Print Network [OSTI]

    Pearson, John Montgomery

    1997-01-01T23:59:59.000Z

    , the powder is placed in a deformable mold ? often rubber, glass, or stainless steel. The container is evacuated and welded shut and then placed inside the HIP unit. A high- pressure gas or liquid surrounds the powder mold and applies pressure equally on all... oxide films and provide new surface area for welding. Next, the particles are resistance heated and pressure is applied for about 15 minutes. Applied temperatures are lower than HIP temperatures, and PAS uses much shorter consolidation times ? minutes...

  11. Quality experimental and calculated powder x-ray diffraction

    SciTech Connect (OSTI)

    Sullenger, D.B.; Cantrell, J.S.; Beiter, T.A.; Tomlin, D.W.

    1996-08-01T23:59:59.000Z

    For several years, we have submitted quality powder XRD patterns to the International Centre for Diffraction Data for inclusion as reference standards in their Powder Diffraction File. The procedure followed is described; examples used are {beta}-UH{sub 3}, {alpha}- BaT{sub 2}, alpha-lithium disilicate ({alpha}-Li{sub 2}Si{sub 2}O{sub 5}), and 2,2`,4,4`,6,6`hexanitroazobenzene-III (HNAB-III).

  12. Powder segregation during the filling of a simple die

    E-Print Network [OSTI]

    Lawrence, Larry Raymond

    1968-01-01T23:59:59.000Z

    . During vibratory die f il ling, f iltration of f ines through the moving powder mass is still a major cause of segregation. The vibration tends to flatten out the inner mound of fines, thereby decreasing radial segregation and increasing vertical... SEGREGATION DURING DIE FILLING 23 l. Introduction 23 2. Experimental 2. 1. Materials 2. 2. Equipment and Procedure 23 23 24 3. Results 4. Discussion 5. Conclusions 24 24 31 III. SOME EFFECTS OF VIBRATION UPON POWDER SEGREGATION DURING DIE...

  13. Titanium Metal Powder Production by the Plasma Quench Process

    SciTech Connect (OSTI)

    R. A. Cordes; A. Donaldson

    2000-09-01T23:59:59.000Z

    The goals of this project included the scale-up of the titanium hydride production process to a production rate of 50 kg/hr at a purity level of 99+%. This goal was to be achieved by incrementally increasing the production capability of a series of reactor systems. This methodic approach was designed to allow Idaho Titanium Technologies to systematically address the engineering issues associated with plasma system performance, and powder collection system design and performance. With quality powder available, actual fabrication with the titanium hydride was to be pursued. Finally, with a successful titanium production system in place, the production of titanium aluminide was to be pursued by the simultaneously injection of titanium and aluminum precursors into the reactor system. Some significant accomplishments of the project are: A unique and revolutionary torch/reactor capable of withstanding temperatures up to 5000 C with high thermal efficiency has been operated. The dissociation of titanium tetrachloride into titanium powder and HC1 has been demonstrated, and a one-megawatt reactor potentially capable of producing 100 pounds per hour has been built, but not yet operated at the powder level. The removal of residual subchlorides and adsorbed HC1 and the sintering of powder to form solid bodies have been demonstrated. The production system has been operated at production rates up to 40 pounds per hour. Subsequent to the end of the project, Idaho Titanium Technologies demonstrated that titanium hydride powder can indeed be sintered into solid titanium metal at 1500 C without sintering aids.

  14. The cation inversion and magnetization in nanopowder zinc ferrite obtained by soft mechanochemical processing

    SciTech Connect (OSTI)

    Milutinovi?, A. [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia); Lazarevi?, Z., E-mail: lzorica@yahoo.com [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia); Jovaleki?, ?. [Institute for Multidisciplinary Research, University of Belgrade, Belgrade (Serbia); Kuryliszyn-Kudelska, I. [Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw (Poland); Rom?evi?, M.; Kosti?, S.; Rom?evi?, N. [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia)

    2013-11-15T23:59:59.000Z

    Graphical abstract: - Highlights: • Nano powder of ZnFe{sub 2}O{sub 4} prepared by a soft mechanochemical route after 18 h milling. • Phase formation controlled by XRD, Raman spectroscopy and magnetic measurements. • Size, strain and cation inversion degree determined by Rietveld refinement. • We were able to estimate the degree of inversion at most 0.348 and 0.4. • Obtained extremely high values of saturation magnetizations at T = 4.5 K. - Abstract: Two zinc ferrite nanoparticle materials were prepared by the same method – soft mechanochemical synthesis, but starting from different powder mixtures: (1) Zn(OH){sub 2}/?-Fe{sub 2}O{sub 3} and (2) Zn(OH){sub 2}/Fe(OH){sub 3}. In both cases a single phase system was obtained after 18 h of milling. The progress of the synthesis was controlled by X-ray diffractometry (XRD), Raman spectroscopy, TEM and magnetic measurements. Analysis of the XRD patterns by Rietveld refinement allowed determination of the cation inversion degree for both obtained single phase ZnFe{sub 2}O{sub 4} samples. The sample obtained from mixture (1) has the cation inversion degree 0.3482 and the sample obtained from mixture (2) 0.400. Magnetization measurements were confirmed that the degrees of the inversion were well estimated. Comparison with published data shows that used method of synthesis gives nano powder samples with extremely high values of saturation magnetizations: sample (1) 78.3 emu g{sup ?1} and sample (2) 91.5 emu g{sup ?1} at T = 4.5 K.

  15. Recovery of yttrium from fluorescent powder of cathode ray tube, CRT: Zn removal by sulphide precipitation

    SciTech Connect (OSTI)

    Innocenzi, Valentina, E-mail: valentina.innocenzi1@univaq.it [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy); De Michelis, Ida; Ferella, Francesco [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy); Beolchini, Francesca [Department of Marine Sciences, Polytechnic Institute of Marche, Via Brecce Bianche, 60131 Ancona (Italy); Kopacek, Bernd [SAT, Austrian Society for Systems Engineering and Automation, Gurkasse 43/2, A-1140 Vienna (Austria); Vegliò, Francesco [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy)

    2013-11-15T23:59:59.000Z

    Highlights: • Treatment of fluorescent powder of CRT waste. • Factorial experimental designs to study acid leaching of fluorescent powder and the purification of leach liquors. • Recover of yttrium by precipitation using oxalic acid. • Suitable flowsheet to recover yttrium from fluorescent powder. - Abstract: This work is focused on the recovery of yttrium and zinc from fluorescent powder of cathode ray tube (CRT). Metals are extracted by sulphuric acid in the presence of hydrogen peroxide. Leaching tests are carried out according to a 2{sup 2} full factorial plan and the highest extraction yields for yttrium and zinc equal to 100% are observed under the following conditions: 3 M of sulphuric acid, 10% v/v of H{sub 2}O{sub 2} concentrated solution at 30% v/v, 10% w/w pulp density, 70 °C and 3 h of reaction. Two series of precipitation tests for zinc are carried out: a 2{sup 2} full factorial design and a completely randomized factorial design. In these series the factors investigated are pH of solution during the precipitation and the amount of sodium sulphide added to precipitate zinc sulphide. The data of these tests are used to describe two empirical mathematical models for zinc and yttrium precipitation yields by regression analysis. The highest precipitation yields for zinc are obtained under the following conditions: pH equal to 2–2.5% and 10–12% v/v of Na{sub 2}S concentrated solution at 10% w/v. In these conditions the coprecipitation of yttrium is of 15–20%. Finally further yttrium precipitation experiments by oxalic acid on the residual solutions, after removing of zinc, show that yttrium could be recovered and calcined to obtain the final product as yttrium oxide. The achieved results allow to propose a CRT recycling process based on leaching of fluorescent powder from cathode ray tube and recovery of yttrium oxide after removing of zinc by precipitation. The final recovery of yttrium is 75–80%.

  16. SOME EFFECTS OF DDT ON THE GUPPY AND THE BROWN TROUT

    E-Print Network [OSTI]

    399 SOME EFFECTS OF DDT ON THE GUPPY AND THE BROWN TROUT SPECIAL SCIENTIFIC REPORT-FISHERIES Na 399, Daniel H . Janzen, Director SOME EFFECTS OF DDT ON THE GUPPY AND THE BROWN TROUT By Susan Frances King following exposure to DDT .... 6 Results 6 Bioassays with the guppy 6 Bioassays with young brown trout 8 Hi

  17. Toward Systems Biology in Brown Algae to Explore Acclimation and Adaptation to the Shore Environment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Toward Systems Biology in Brown Algae to Explore Acclimation and Adaptation to the Shore,2 Catherine Boyen,1,2 and Anne Siegel4,5 Abstract Brown algae belong to a phylogenetic lineage distantly siliculosus as a model organism for brown algae has represented a framework in which several omics techniques

  18. In vitro degradation and cytotoxicity of Mg/Ca composites produced by powder metallurgy q

    E-Print Network [OSTI]

    Zheng, Yufeng

    In vitro degradation and cytotoxicity of Mg/Ca composites produced by powder metallurgy q Y Biodegradation Cytotoxicity Powder metallurgy a b s t r a c t Mg/Ca (1 wt.%, 5 wt.%, 10 wt.% Ca) composites were prepared from pure magnesium and calcium powders using the powder metallurgy method, aiming to enlarge

  19. Powder Diffraction with Proteins Jon Wright, Irene Margiolaki, Andy Fitch and Yves Watier

    E-Print Network [OSTI]

    Magee, Joseph W.

    Powder Diffraction with Proteins Jon Wright, Irene Margiolaki, Andy Fitch and Yves Watier #12 C 3Wright, Protein Powders #12;Wright, Protein Powders 4 Structure representations #12;Wright method to "solve" phase problem · What do we see in electron density maps? 6Wright, Protein Powders #12

  20. Edmund G. Brown, Jr. ENERGY-EFFICIENT COMMUNITY

    E-Print Network [OSTI]

    's provided structure-specific building plans. The alternative energy efficiency approaches are; "EE Package" design approach incorporating advanced energy efficiency measures including alternative grades of wall andEdmund G. Brown, Jr. Governor ENERGY-EFFICIENT COMMUNITY DEVELOPMENT IN CALIFORNIA: CHULA VISTA

  1. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    145 Computer Science The George R. Brown School of Engineering Chair Keith Cooper Professors Robert Tour researCh Professor Peter Druschel #12;146 Departments/ Computer Science Eight courses for a total Intermediate Programming COMP 280 Mathematics of Computer Science COMP 314 Applied Algorithms and Data

  2. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    139 Computer Science The George R. Brown School of Engineering Degrees Offered: BA, BSCS, MCS, MS, and PhD Computer science is concerned with the study of computers and computing, focusingonalgorithms to real-world computational problems. Computer science is the intellectual discipline underlying

  3. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    145 Computer Science The George R. Brown School of Engineering Chair Keith Cooper Professors Robert Chemistry) Professor James Tour #12;146 DEPARTMENTS / Computer Science Computer science is concerned to produce solutions to real-world computational problems. Computer science is the intellectual discipline

  4. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    141 Computer Science The George R. Brown School of Engineering Degrees Offered: BA, BSCS, MCS, MS, and PhD Computer science is concerned with the study of computers and computing, focusingonalgorithmsTour #12;142 DEPARTMENTS/ Computer Science body of knowledge can be used to produce solutions to real

  5. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    153 Computer Science The George R. Brown School of Engineering Chair Joe Warren Professors Robert S'Malley with Chemistry Professor James Tour researCh Professor Peter Druschel #12;154 Departments/ Computer Science Six Matrix Analysis Math and Science Courses Degrees Offered: BA, BSCS, MCS, MS, and PhD Computer science

  6. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    Computer Science The George R. Brown School of Engineering Chair Joe D. Warren Professors Robert S researCh Professor Peter Druschel #12;2 Departments/ Computer Science Six courses for a total of 18 hours Degrees Offered: BA, BSCS, MCS, MS, and PhD Computer science is concerned with the study of computers

  7. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    1 Computer Science The George R. Brown School of Engineering Chair Joe Warren Professors Robert S #12;2 Departments/ Computer Science Six courses for a total of 18 hours, required for all majors, MS, and PhD Computer science is concerned with the study of computers and computing

  8. Computer Science The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    135 Computer Science The George R. Brown School of Engineering Chair Moshe Y. Vardi Professors Science Computer science is concerned with the study of computers and computing, focusing on algorithms. Computer science is the intellectual discipline underlying information technology, which is widely accepted

  9. Air Traffic Control Using Virtual Stationary Automata Matthew D. Brown

    E-Print Network [OSTI]

    Lynch, Nancy

    Air Traffic Control Using Virtual Stationary Automata by Matthew D. Brown B.S., Massachusetts by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;Air Traffic Control Using Virtual of Engineering Abstract As air travel has become an essential part of modern life, the air traffic control system

  10. Novel Dipole Trapped Spheromak Configuration M. R. Brown,1,

    E-Print Network [OSTI]

    Brown, Michael R.

    Novel Dipole Trapped Spheromak Configuration M. R. Brown,1, * C. D. Cothran,1 J. Fung,1 M. J. Schaffer,2 and E. Belova3 We report the observation and characterization of a spheromak formed in the Swarthmore Spheromak Experiment (SSX) and trapped in a simple dipole magnetic field. The spheromak is studied

  11. SSX Spheromak Merging Experiment Michael Brown, Swarthmore, PI

    E-Print Network [OSTI]

    Brown, Michael R.

    SSX Spheromak Merging Experiment Michael Brown, Swarthmore, PI Scientific Goals: We have three main gun technique to form single spheromaks and merged pairs of spheromaks to study novel magnetic configurations. A single spheromak can be injected into a flux conserver and stabilized with a simple dipole

  12. Join us for this"bonus" brown bag seminar,

    E-Print Network [OSTI]

    Kammen, Daniel M.

    policy. He also is the founding director of the Renewable and Appropriate Energy Laboratory (RAELJoin us for this"bonus" brown bag seminar, sponsored by the National Renewable Energy Laboratory link to Golden,Colorado. Topics focus on new and innovative renewable energy and energy analysis

  13. Chemical Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    environments. Courses in mathematics, chemistry, physics, and computational engineering provide the background/312 Physical Chemistry Any 2 of CHEM 212, CHEM 311, or CHEM 312 Chemical Engineering CENG 301 Chemical110 Chemical Engineering The George R. Brown School of Engineering Chair Kyriacos Zygourakis

  14. Software Reuse in High Performance Computing Shirley Browne

    E-Print Network [OSTI]

    Hawick, Ken

    Software Reuse in High Performance Computing Shirley Browne University of Tennessee 107 Ayres Hall high performance computing architectures in the form of distributed memorymul- tiprocessors have become of programming applications to run on these machines. Economical use of high performance computing and subsequent

  15. Software Reuse in High Performance Computing Shirley Browne

    E-Print Network [OSTI]

    Dongarra, Jack

    Software Reuse in High Performance Computing Shirley Browne University of Tennessee 107 Ayres Hall high performance computing architectures in the form of distributed memory mul­ tiprocessors have and cost of programming applications to run on these machines. Economical use of high performance computing

  16. PLEASE JOIN US! NANOSCIENCE and TECHNOLOGY BROWN BAG

    E-Print Network [OSTI]

    PLEASE JOIN US! NANOSCIENCE and TECHNOLOGY BROWN BAG Friday, 7 November 2008 Noon - 1 pm Columbia Meyyappan Chief Scientist for Exploration Technology, NASA Ames Research Center & IEEE Electron Devices Society Distinguished Lecturer presenting Nanotechnology in Chemical and Bio Sensor Systems Abstract

  17. INDIUM--1997 37.1 By Robert D. Brown, Jr.

    E-Print Network [OSTI]

    INDIUM--1997 37.1 INDIUM By Robert D. Brown, Jr. There was no known production of indium at domestic mines, and none was recovered from ores in the United States in 1997. Domestic indium production and Rhode Island, were the major producers of indium metal and indium products in 1997. Several smaller

  18. Brown Dwarfs as Ejected Stellar Embryos: Observational Perspectives

    E-Print Network [OSTI]

    Bo Reipurth; Cathie Clarke

    2002-08-31T23:59:59.000Z

    We discuss a scenario in which brown dwarfs are formed like stars, except that their full collapse phases are interrupted through dynamical interactions in small multiple systems, leading to the ejection of the lightest member. This disintegration is a stochastic process, often resulting in the expulsion of newborn low mass stars, but when it occurs early enough the ejected stellar embryo will be a substellar object. This process may be so common at early ages that a large fraction of the ubiquitous brown dwarfs could have formed in this manner. Detailed gas dynamical simulations are required in order to better understand the details of the decay of small newborn multiple systems. We discuss the observational consequences of the ejection hypothesis, noting especially the importance of binaries with brown dwarf components as an observational test. Finally, we note that brown dwarfs that have recently been ejected may be so disturbed, by infall from the collapsing core and also by heavy accretion from perturbed circumstellar disks, that traditional spectral and luminosity criteria may fail to identify their substellar nature.

  19. Edmund G. Brown, Jr. ENERGY-EFFICIENT COMMUNITY

    E-Print Network [OSTI]

    Commission Elaine Hebert Project Manager Chris Scruton Program Area Lead Buildings Energy End-Use Efficiency Remp ­ City of Chula Vista, California · Larisa Dobriansky ­ National Energy Center for SustainableEdmund G. Brown, Jr. Governor ENERGY-EFFICIENT COMMUNITY DEVELOPMENT IN CALIFORNIA: CHULA VISTA

  20. Edmund G. Brown, Jr. FUEL CELL AND DISTRIBUTED

    E-Print Network [OSTI]

    Edmund G. Brown, Jr. Governor FUEL CELL AND DISTRIBUTED GENERATION RESEARCH, DEVELOPMENT Research Program Prepared By: National Fuel Cell Research Center August 2011 CEC-500-2011-042 #12; Prepared By: National Fuel Cell Research Center Project Manager: G. Scott Samuelsen, Ph.D. Authors: Josh

  1. Astronomy Advisory Panel Richard Bower, Michael Brown, Anthony

    E-Print Network [OSTI]

    Crowther, Paul

    Astronomy Advisory Panel Richard Bower, Michael Brown, Anthony Challinor, Chris Evans, Paul O to provide large contracts for UK industry. · High Performance Computing access ­ fund hardware upgrades via over 10 years Many UK science areas: dark energy/matter, galactic structure, transients, solar system

  2. SHORT COMMUNICATION Behaviour of brown bears killing wild ungulates

    E-Print Network [OSTI]

    Boyer, Edmond

    SHORT COMMUNICATION Behaviour of brown bears killing wild ungulates in the Cantabrian Mountains documentation regarding bear predation on wild ungulates in Southern Europe. We describe search, detection wild boar by a female bear with cubs surprised by a sudden encounter. They did not eat the boar after

  3. Molecular Selectivity of Brown Carbon Chromophores Julia Laskin,*,

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    , Irvine, California 92697, United States Chemical Sciences Division, Lawrence Berkeley National into imines mediated by NH3 vapors in humid air, resulted in selective browning of the LSOA sample, while the PSOA sample remained white. Comparative analysis of the reaction products in the aged LSOA and PSOA

  4. Hydroliquefaction of Big Brown lignite in supercritical fluids

    E-Print Network [OSTI]

    Chen, Hui

    1996-01-01T23:59:59.000Z

    Big Brown lignite was liquefied in a fixed bed tube reactor. Three solvents were used in the liquefaction studies, toluene, cyclohexane and methanol. Two co-solvents, tetralin and water were used with toluene. The effects of the solvents and co...

  5. Hubble Space Telescope Spectroscopy of Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer

    E-Print Network [OSTI]

    Schneider, Adam C; Kirkpatrick, J Davy; Gelino, Christopher R; Mace, Gregory N; Wright, Edward L; Eisenhardt, Peter R; Skrutskie, M F; Griffith, Roger L; Marsh, Kenneth A

    2015-01-01T23:59:59.000Z

    We present a sample of brown dwarfs identified with the {\\it Wide-field Infrared Survey Explorer} (WISE) for which we have obtained {\\it Hubble Space Telescope} ({\\it HST}) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy. The sample (twenty-two in total) was observed with the G141 grism covering 1.10$-$1.70 $\\mu$m, while fifteen were also observed with the G102 grism, which covers 0.90$-$1.10 $\\mu$m. The additional wavelength coverage provided by the G102 grism allows us to 1) search for spectroscopic features predicted to emerge at low effective temperatures (e.g.\\ ammonia bands) and 2) construct a smooth spectral sequence across the T/Y boundary. We find no evidence of absorption due to ammonia in the G102 spectra. Six of these brown dwarfs are new discoveries, three of which are found to have spectral types of T8 or T9. The remaining three, WISE J082507.35$+$280548.5 (Y0.5), WISE J120604.38$+$840110.6 (Y0), and WISE J235402.77$+$024015.0 (Y1) are the nineteenth, twentieth, and twenty-first spec...

  6. Microstructural Development in Al-Si Powder During Rapid Solidification

    SciTech Connect (OSTI)

    Amber Lynn Genau

    2004-12-19T23:59:59.000Z

    Powder metallurgy has become an increasingly important form of metal processing because of its ability to produce materials with superior mechanical properties. These properties are due in part to the unique and often desirable microstructures which arise as a result of the extreme levels of undercooling achieved, especially in the finest size powder, and the subsequent rapid solidification which occurs. A better understanding of the fundamental processes of nucleation and growth is required to further exploit the potential of rapid solidification processing. Aluminum-silicon, an alloy of significant industrial importance, was chosen as a model for simple eutectic systems displaying an unfaceted/faceted interface and skewed coupled eutectic growth zone, Al-Si powder produced by high pressure gas atomization was studied to determine the relationship between microstructure and alloy composition as a function of powder size and atomization gas. Critical experimental measurements of hypereutectic (Si-rich) compositions were used to determine undercooling and interface velocity, based on the theoretical models which are available. Solidification conditions were analyzed as a function of particle diameter and distance from nucleation site. A revised microstructural map is proposed which allows the prediction of particle morphology based on temperature and composition. It is hoped that this work, by providing enhanced understanding of the processes which govern the development of the solidification morphology of gas atomized powder, will eventually allow for better control of processing conditions so that particle microstructures can be optimized for specific applications.

  7. Method for producing microcomposite powders using a soap solution

    DOE Patents [OSTI]

    Maginnis, Michael A. (Coker, AL); Robinson, David A. (Mobile, AL)

    1996-01-01T23:59:59.000Z

    A method for producing microcomposite powders for use in superconducting and non-superconducting applications. A particular method to produce microcomposite powders for use in superconducting applications includes the steps of: (a) preparing a solution including ammonium soap; (b) dissolving a preselected amount of a soluble metallic such as silver nitrate in the solution including ammonium soap to form a first solution; (c) adding a primary phase material such as a single phase YBC superconducting material in particle form to the first solution; (d) preparing a second solution formed from a mixture of a weak acid and an alkyl-mono-ether; (e) adding the second solution to the first solution to form a resultant mixture; (f) allowing the resultant mixture to set until the resultant mixture begins to cloud and thicken into a gel precipitating around individual particles of the primary phase material; (g) thereafter drying the resultant mixture to form a YBC superconducting material/silver nitrate precursor powder; and (h) calcining the YBC superconducting material/silver nitrate precursor powder to convert the silver nitrate to silver and thereby form a YBC/silver microcomposite powder wherein the silver is substantially uniformly dispersed in the matrix of the YBC material.

  8. Mechanochemical synthesis of tungsten carbide nano particles by using WO{sub 3}/Zn/C powder mixture

    SciTech Connect (OSTI)

    Hoseinpur, Arman, E-mail: arman.hoseinpur@stu-mail.um.ac.ir [Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Islamic Republic of Iran (Iran, Islamic Republic of)] [Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Islamic Republic of Iran (Iran, Islamic Republic of); Vahdati Khaki, Jalil; Marashi, Maryam Sadat [Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Islamic Republic of Iran (Iran, Islamic Republic of)] [Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Islamic Republic of Iran (Iran, Islamic Republic of)

    2013-02-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? Nano particles of WC are synthesized by mechanochemical process. ? Zn was used to reduce WO{sub 3}. ? By removing ZnO from the milling products with an acid leaching, WC will be the final products. ? XRD results showed that the reduction reactions were completed after 36 h. ? TEM and SEM images showed that the morphology of produced powder is nearly spherical like. -- Abstract: In this research we introduce a new, facile, and economical system for fabrication of tungsten carbide (WC) nano particle powder. In this system WO{sub 3}, Zn, and C have been ball-milled for several hours, which led to the synthesis of tungsten carbide nano particles. The synthesized WC can successfully be separated from the ball-milled product by subjecting the product powder to diluted HCl for removing ZnO and obtaining WC. X-ray diffraction (XRD) analysis indicates that the reduction of WO{sub 3} will be completed gradually by increasing milling time up to 36 h. Scanning electron microscope (SEM), and transmission electron microscope (TEM) images show that after 36 h of milling the particle size of the fabricated powder is nano metric (about 20 nm). Results have shown that this system can surmount some main problems occurred in previous similar WC synthesizing systems. For example carbothermic reduction reactions, which lead to the synthesis of W{sub 2}C instead of WC, would not be activated because in this system reactions take place gradually.

  9. Tap Density Equations of Granular Powders Based on the Rate Process Theory and the Free Volume Concept

    E-Print Network [OSTI]

    Tian Hao

    2014-09-05T23:59:59.000Z

    Tap density of a granular powder is often linked to the flowability via Carr Index that measures how tight a powder can be packed, under an assumption that more easily packed powders usually flow poorly. Understanding how particles are packed is important for revealing why a powder flows better than others. There are two types of empirical equations that were proposed to fit the experimental data of packing fractions vs. numbers of taps in literature: The inverse logarithmic and the stretched exponential. Using the rate process theory and the free volume concept, we obtain the tap density equations and they can be reducible to the two empirical equations currently widely used in literature. Our equations could potentially fit experimental data better with an additional adjustable parameter. The tapping amplitude and frequency, the weight of the granular materials, and the environment temperature are grouped into one parameter that weighs the pace of packing process. The current results, in conjunction with our previous findings, may imply that both dry(granular)and wet(colloidal and polymeric) particle systems are governed by the same physical mechanisms in term of the role of the free volume and how particles behave (a rate controlled process).

  10. Method and apparatus for the production of metal oxide powder

    DOE Patents [OSTI]

    Harris, Michael T. (Knoxville, TN); Scott, Timothy C. (Knoxville, TN); Byers, Charles H. (Oak Ridge, TN)

    1993-01-01T23:59:59.000Z

    The present invention provides a method for preparing metal oxide powder. A first solution, which is substantially organic, is prepared. A second solution, which is an aqueous solution substantially immiscible in the first solution, is prepared and delivered as drops to the first solution. The drops of the second solution are atomized by a pulsed electric field forming micro-drops of the second solution. Reagents in the first solution diffuse into and react with reactants in the micro-drops of the second solution forming metal hydroxide or oxalate particles. The metal hydroxide or metal oxalate particles are then recovered and dried to produce the metal oxide powder. An apparatus for preparing a metal oxide powder is also disclosed.

  11. Method and apparatus for the production of metal oxide powder

    DOE Patents [OSTI]

    Harris, Michael T. (Knoxville, TN); Scott, Timothy C. (Knoxville, TN); Byers, Charles H. (Oak Ridge, TN)

    1992-01-01T23:59:59.000Z

    The present invention provides a method for preparing metal oxide powder. A first solution, which is substantially organic, is prepared. A second solution, which is an aqueous solution substantially immiscible in the first solution, is prepared and delivered as drops to the first solution. The drops of the second solution are atomized by a pulsed electric field forming micro-drops of the second solution. Reagents in the first solution diffuse into and react with reactants in the micro-drops of the second solution forming metal hydroxide or oxalate particles. The metal hydroxide or metal oxalate particles are then recovered and dried to produce the metal oxide powder. An apparatus for preparing a metal oxide powder is also disclosed.

  12. Method and apparatus for the production of metal oxide powder

    DOE Patents [OSTI]

    Harris, M.T.; Scott, T.C.; Byers, C.H.

    1992-06-16T23:59:59.000Z

    The present invention provides a method for preparing metal oxide powder. A first solution, which is substantially organic, is prepared. A second solution, which is an aqueous solution substantially immiscible in the first solution, is prepared and delivered as drops to the first solution. The drops of the second solution are atomized by a pulsed electric field forming micro-drops of the second solution. Reagents in the first solution diffuse into and react with reactants in the micro-drops of the second solution forming metal hydroxide or oxalate particles. The metal hydroxide or metal oxalate particles are then recovered and dried to produce the metal oxide powder. An apparatus for preparing a metal oxide powder is also disclosed. 2 figs.

  13. A simple procedure to prepare spherical {alpha}-alumina powders

    SciTech Connect (OSTI)

    Liu Hongyu [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China); Ning Guiling [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China)], E-mail: ninggl@dlut.edu.cn; Gan Zhihong; Lin Yuan [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China)

    2009-04-02T23:59:59.000Z

    Spherical {alpha}-alumina powders were prepared by the controlled hydrolysis of aluminum isopropoxide in a hydrolysis system consisting of octanol and acetonitrile. Diverse solvents to dissolve reactant formed diverse hydrolysis systems and affected particle shape of {alpha}-alumina powders. The precursors crystallized to {gamma}-alumina at 1000 deg. C and converted to {alpha}-alumina at 1150 deg. C without intermediate phases. The particle morphology of precursor was retained after it crystallized to {alpha}-alumina. The heating rate influenced the particle shape and the state of agglomeration during calcination process. The thermal properties of the precursors were characterized by thermal gravimetric and differential thermal analysis. X-ray diffraction technique was used to confirm the conversion of crystalline phase of alumina powders from amorphous to {alpha}-phase. Transmission electron microscopy was used to investigate the morphologies and size of the precursors and products.

  14. Aerosol flow reactor production of superconducting ceramic powder

    SciTech Connect (OSTI)

    Kodas, T. (New Mexico Univ., Albuquerque, NM (USA). Dept. of Nuclear Engineering); Engler, E.; Lee, V.; Parkin, L.S. (Research Div., Almaden Research Center, San Jose, CA (US))

    1988-01-01T23:59:59.000Z

    Potential applications and basic studies of superconducting ceramics require the reproducible production of chemically homogeneous, ultrapure powders with controlled particle size distributions. Previous work has mainly examined the use of liquid and solid phase methods for superconducting powder production. In this work, it is shown that carbon-free, submicron powders based on the Y-Ba-Cu-O, La-Sr-Cu-O, Bi-Ca-Sr-Cu-O and Tl-Ca-Ba-Cu-O systems can be produced in a gaseous flow system by reacting aerosol particles containing the nitrate salts of the appropriate metals in flowing oxygen at temperatures of 900 - 1100C. It is also demonstrated that composite Cu/YBa/sub 2/Cu/sub 3/O/sub 7/ wires can be fabricated by thermophoretic deposition of the particles onto the inner surface of a Cu tube hby sintering/annealing.

  15. Field Testing of Activated Carbon Injection Options for Mercury Control at TXU's Big Brown Station

    SciTech Connect (OSTI)

    John Pavlish; Jeffrey Thompson; Christopher Martin; Mark Musich; Lucinda Hamre

    2009-01-07T23:59:59.000Z

    The primary objective of the project was to evaluate the long-term feasibility of using activated carbon injection (ACI) options to effectively reduce mercury emissions from Texas electric generation plants in which a blend of lignite and subbituminous coal is fired. Field testing of ACI options was performed on one-quarter of Unit 2 at TXU's Big Brown Steam Electric Station. Unit 2 has a design output of 600 MW and burns a blend of 70% Texas Gulf Coast lignite and 30% subbituminous Powder River Basin coal. Big Brown employs a COHPAC configuration, i.e., high air-to-cloth baghouses following cold-side electrostatic precipitators (ESPs), for particulate control. When sorbent injection is added between the ESP and the baghouse, the combined technology is referred to as TOXECON{trademark} and is patented by the Electric Power Research Institute in the United States. Key benefits of the TOXECON configuration include better mass transfer characteristics of a fabric filter compared to an ESP for mercury capture and contamination of only a small percentage of the fly ash with AC. The field testing consisted of a baseline sampling period, a parametric screening of three sorbent injection options, and a month long test with a single mercury control technology. During the baseline sampling, native mercury removal was observed to be less than 10%. Parametric testing was conducted for three sorbent injection options: injection of standard AC alone; injection of an EERC sorbent enhancement additive, SEA4, with ACI; and injection of an EERC enhanced AC. Injection rates were determined for all of the options to achieve the minimum target of 55% mercury removal as well as for higher removals approaching 90%. Some of the higher injection rates were not sustainable because of increased differential pressure across the test baghouse module. After completion of the parametric testing, a month long test was conducted using the enhanced AC at a nominal rate of 1.5 lb/Macf. During the time that enhanced AC was injected, the average mercury removal for the month long test was approximately 74% across the test baghouse module. ACI was interrupted frequently during the month long test because the test baghouse module was bypassed frequently to relieve differential pressure. The high air-to-cloth ratio of operations at this unit results in significant differential pressure, and thus there was little operating margin before encountering differential pressure limits, especially at high loads. This limited the use of sorbent injection as the added material contributes to the overall differential pressure. This finding limits sustainable injection of AC without appropriate modifications to the plant or its operations. Handling and storage issues were observed for the TOXECON ash-AC mixture. Malfunctioning equipment led to baghouse dust hopper plugging, and storage of the stagnant material at flue gas temperatures resulted in self-heating and ignition of the AC in the ash. In the hoppers that worked properly, no such problems were reported. Economics of mercury control at Big Brown were estimated for as-tested scenarios and scenarios incorporating changes to allow sustainable operation. This project was funded under the U.S. Department of Energy National Energy Technology Laboratory project entitled 'Large-Scale Mercury Control Technology Field Testing Program--Phase II'.

  16. Method for forming biaxially textured articles by powder metallurgy

    DOE Patents [OSTI]

    Goyal, Amit (Knoxville, TN); Williams, Robert K. (Knoxville, TN); Kroeger, Donald M. (Knoxville, TN)

    2002-01-01T23:59:59.000Z

    A method of preparing a biaxially textured alloy article comprises the steps of preparing a mixture comprising Ni powder and at least one powder selected from the group consisting of Cr, W, V, Mo, Cu, Al, Ce, YSZ, Y, Rare Earths, (RE), MgO, CeO.sub.2, and Y.sub.2 O.sub.3 ; compacting the mixture, followed by heat treating and rapidly recrystallizing to produce a biaxial texture on the article. In some embodiments the alloy article further comprises electromagnetic or electro-optical devices and possesses superconducting properties.

  17. Process for preparing fine grain titanium carbide powder

    DOE Patents [OSTI]

    Janey, Mark A. (Concord, TN)

    1986-01-01T23:59:59.000Z

    A method for preparing finely divided titanium carbide powder in which an organotitanate is reacted with a carbon precursor polymer to provide an admixture of the titanium and the polymer at a molecular-level due to a crosslinking reaction between the organotitanate and the polymer. The resulting gel is dried, pyrolyzed to drive off volatile components and provide carbon. The resulting solids are then heated at an elevated temperature to convert the titanium and carbon to high-purity titanium carbide powder in a submicron size range.

  18. Nano powders, components and coatings by plasma technique

    DOE Patents [OSTI]

    McKechnie, Timothy N. (Brownsboro, AL); Antony, Leo V. M. (Huntsville, AL); O'Dell, Scott (Arab, AL); Power, Chris (Guntersville, AL); Tabor, Terry (Huntsville, AL)

    2009-11-10T23:59:59.000Z

    Ultra fine and nanometer powders and a method of producing same are provided, preferably refractory metal and ceramic nanopowders. When certain precursors are injected into the plasma flame in a reactor chamber, the materials are heated, melted and vaporized and the chemical reaction is induced in the vapor phase. The vapor phase is quenched rapidly to solid phase to yield the ultra pure, ultra fine and nano product. With this technique, powders have been made 20 nanometers in size in a system capable of a bulk production rate of more than 10 lbs/hr. The process is particularly applicable to tungsten, molybdenum, rhenium, tungsten carbide, molybdenum carbide and other related materials.

  19. Active reagents from brown coal and hydrolysis lignin and their interaction with calcium phosphates

    SciTech Connect (OSTI)

    Rubinchik, G.F.; Adylkhodzhaeva, T.A.; Tadzhiev, A.T.

    1985-09-01T23:59:59.000Z

    A method has been developed for producing active reagents from brown coal and hydrolysis lignin by their oxidation with dilute nitric acid. The products obtained contain up to 30 and 46% respectively of humic acids with active functional groups. Reactions of oxidized and ammoniated coal with mono,- di-, and tricalcium phosphate have also been studied. The variation of the composition and yield of the reaction products with the ratio of the substances taken have been investigated. It has been found that the addition of oxidized coal to mono-, di-, and tricalcium phosphate raised the quantity of the water-soluble P/sub 2/O/sub 5/ froms, i.e., this hinders phosphorous fixation in the soil.

  20. Treatment of biomass to obtain ethanol

    DOE Patents [OSTI]

    Dunson, Jr., James B. (Newark, DE); Elander, Richard T. (Evergreen, CO); Tucker, III, Melvin P. (Lakewood, CO); Hennessey, Susan Marie (Avondale, PA)

    2011-08-16T23:59:59.000Z

    Ethanol was produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  1. AA Dor - An Eclipsing sdOB - Brown Dwarf Binary

    E-Print Network [OSTI]

    Thomas Rauch

    2003-11-25T23:59:59.000Z

    AA Dor is an eclipsing, close, post common-envelope binary consisting of a sdOB primary star and an unseen secondary with an extraordinary small mass - formally a brown dwarf. The brown dwarf may have been a former planet which survived a common envelope phase and has even gained mass. A recent determination of the components' masses from results of NLTE spectral analysis and subsequent comparison to evolutionary tracks shows a discrepancy to masses derived from radial-velocity and the eclipse curves. Phase-resolved high-resolution and high-SN spectroscopy was carried out in order to investigate on this problem. We present results of a NLTE spectral analysis of the primary, an analysis of its orbital parameters, and discuss possible evolutionary scenarios.

  2. Intern experience at Teledyne Brown Engineering: an internship report

    E-Print Network [OSTI]

    Hammond, Walter Edward, 1947-

    2013-03-13T23:59:59.000Z

    -Value Attack and Defense Effectiveness Model MX Missile X NASA National Aeronautics and Space Agency OPUS Optimal Preferential Utilities and Strategies Program OR Operations Research O&S Operations and Support PBV Post Boost Vehicle P.E. Professional... under decentralized management and strong local autonomy. In addition to its main facilities in Huntsville's Cummings Research Park, Teledyne Brown Engineering has branch operations at the Huntsville-Madison County Airport and in California, Colorado...

  3. Engineering internship at Brown & Root, Incorporated: a report

    E-Print Network [OSTI]

    Gannaway, Randall Joe, 1952-

    2013-03-13T23:59:59.000Z

    A Report by RANDALL JOE GANNAWAY Submitted to the College of Engineering Texas A&M University in partial fulfillment of the requirement for the degree DOCTOR OF ENGINEERING December 1977 Major Subjects Industrial Engineering A Report... e of Engineering) W. Smith (Member) December 1977 A Report on an Engineering Internship at Brown & Root, Incorporated. (December 1977) Randall Joe Gannaway, B.S., Texas A&M University; M.E., Texas A&M University Co-Chairmen of Advisory...

  4. ATMOSPHERIC DYNAMICS OF BROWN DWARFS AND DIRECTLY IMAGED GIANT PLANETS

    SciTech Connect (OSTI)

    Showman, Adam P. [Department of Planetary Sciences and Lunar and Planetary Laboratory, The University of Arizona, 1629 University Boulevard, Tucson, AZ 85721 (United States); Kaspi, Yohai, E-mail: showman@lpl.arizona.edu [Center for Planetary Science, Weizmann Institute of Science, Rehovot (Israel)

    2013-10-20T23:59:59.000Z

    A variety of observations provide evidence for vigorous motion in the atmospheres of brown dwarfs and directly imaged giant planets. Motivated by these observations, we examine the dynamical regime of the circulation in the atmospheres and interiors of these objects. Brown dwarfs rotate rapidly, and for plausible wind speeds, the flow at large scales will be rotationally dominated. We present three-dimensional, global, numerical simulations of convection in the interior, which demonstrate that at large scales, the convection aligns in the direction parallel to the rotation axis. Convection occurs more efficiently at high latitudes than low latitudes, leading to systematic equator-to-pole temperature differences that may reach ?1 K near the top of the convection zone. The interaction of convection with the overlying, stably stratified atmosphere will generate a wealth of atmospheric waves, and we argue that, as in the stratospheres of planets in the solar system, the interaction of these waves with the mean flow will cause a significant atmospheric circulation at regional to global scales. At large scales, this should consist of stratified turbulence (possibly organizing into coherent structures such as vortices and jets) and an accompanying overturning circulation. We present an approximate analytic theory of this circulation, which predicts characteristic horizontal temperature variations of several to ?50 K, horizontal wind speeds of ?10-300 m s{sup –1}, and vertical velocities that advect air over a scale height in ?10{sup 5}-10{sup 6} s. This vertical mixing may help to explain the chemical disequilibrium observed on some brown dwarfs. Moreover, the implied large-scale organization of temperature perturbations and vertical velocities suggests that near the L/T transition, patchy clouds can form near the photosphere, helping to explain recent observations of brown-dwarf variability in the near-IR.

  5. A review of "Thomas Browne" edited by Kevin Killeen

    E-Print Network [OSTI]

    Black, Joseph L.

    2015-01-01T23:59:59.000Z

    marks an important contribution to the revival of interest in a writer whose work, while long admired, had been largely relegated by the academy to the category of literary curiosity (according to the editors of Sir Thomas Browne: The World Proposed... unto me at nights till she read them all out” (in Keynes (ed.), Miscellaneous Writings (1931), 295–96). Recent work on book and reading history has made such documents far more interesting than they were once considered, and this (rather dauntingly...

  6. Rapid formation of phase-clean 110 K (Bi-2223) powders derived via freeze-drying process

    SciTech Connect (OSTI)

    Balachandran, U.; Krishnaraj, P.; Eror, N.G.; Lelovic, M.

    1994-12-31T23:59:59.000Z

    This invention relates to an improved process of preparing Bi-Sr-Ca-Cu-O (BSCCO) powders, and more particularly, to a process for preparing BSCCO powders that utilize freeze-drying. The process generally includes splat freezing a nitrate solution of Bi, Pb, Sr, Ca, and Cu to form flakes of the solution; grinding the flakes to form a powder; freeze-drying the frozen powder; heating the powder to form dry green precursor powders; denitrating the powders; and heating the powders to form phase-clean Bi-2223 powders.

  7. On-site field tests for study of low-rank western coal fly ash. Technical summary report, field test No. 3. Big Brown Station electrostatic precipitator

    SciTech Connect (OSTI)

    Dahlin, R. S.; Bickelhaupt, R. E.; Marchant, Jr., G. H.; Gooch, J. P.

    1984-02-01T23:59:59.000Z

    This report describes the results of field and laboratory studies of combined NH/sub 3/ and SO/sub 3/ conditioning at the Big Brown Station of Texas Utilities Generating Company. This unusual combination of conditioning agents is used routinely at the Big Brown Station in order to improve the performance of the cold-side electrostatic precipitators. The primary objectives of this field study were to evaluate the performance of one of the Big Brown precipitators, and to obtain data on the concentration, composition, and size distribution of the fly ash, as well as the composition of the flue gas and the overall and fractional collection efficiencies of the precipitator. The laboratory studies of the Big Brown fly ash were intended to further characterize the ash both physically and chemically, and to study the attenuation of the electrical resistivity of the ash associated with the surface film produced by the dual conditioning process and by the use of SO/sub 3/ conditioning alone. 6 references, 22 figures, 9 tables.

  8. Oxide Dispersion Strengthened Iron Aluminide by CVD Coated Powders

    SciTech Connect (OSTI)

    Asit Biswas Andrew J. Sherman

    2006-09-25T23:59:59.000Z

    This I &I Category2 program developed chemical vapor deposition (CVD) of iron, aluminum and aluminum oxide coated iron powders and the availability of high temperature oxidation, corrosion and erosion resistant coating for future power generation equipment and can be used for retrofitting existing fossil-fired power plant equipment. This coating will provide enhanced life and performance of Coal-Fired Boilers components such as fire side corrosion on the outer diameter (OD) of the water wall and superheater tubing as well as on the inner diameter (ID) and OD of larger diameter headers. The program also developed a manufacturing route for readily available thermal spray powders for iron aluminide coating and fabrication of net shape component by powder metallurgy route using this CVD coated powders. This coating can also be applid on jet engine compressor blade and housing, industrial heat treating furnace fixtures, magnetic electronic parts, heating element, piping and tubing for fossil energy application and automotive application, chemical processing equipment , heat exchanger, and structural member of aircraft. The program also resulted in developing a new fabrication route of thermal spray coating and oxide dispersion strengthened (ODS) iron aluminide composites enabling more precise control over material microstructures.

  9. Explosively driven low-density foams and powders

    SciTech Connect (OSTI)

    Viecelli, James A. (Orinda, CA); Wood, Lowell L. (Simi Valley, CA); Ishikawa, Muriel Y. (Livermore, CA); Nuckolls, John H. (Danville, CA); Pagoria, Phillip F. (Livermore, CA)

    2010-05-04T23:59:59.000Z

    Hollow RX-08HD cylindrical charges were loaded with boron and PTFE, in the form of low-bulk density powders or powders dispersed in a rigid foam matrix. Each charge was initiated by a Comp B booster at one end, producing a detonation wave propagating down the length of the cylinder, crushing the foam or bulk powder and collapsing the void spaces. The PdV work done in crushing the material heated it to high temperatures, expelling it in a high velocity fluid jet. In the case of boron particles supported in foam, framing camera photos, temperature measurements, and aluminum witness plates suggest that the boron was completely vaporized by the crush wave and that the boron vapor turbulently mixed with and burned in the surrounding air. In the case of PTFE powder, X-ray photoelectron spectroscopy of residues recovered from fragments of a granite target slab suggest that heating was sufficient to dissociate the PTFE to carbon vapor and molecular fluorine which reacted with the quartz and aluminum silicates in the granite to form aluminum oxide and mineral fluoride compounds.

  10. Mechanical Properties of a Metal Powder-Loaded Polyurethane Foam

    SciTech Connect (OSTI)

    C. L. Neuschwanger; L. L. Whinnery; S. H. Goods

    1999-04-01T23:59:59.000Z

    Quasi-static compression tests have been performed on polyurethane foam specimens. The modulus of the foam exhibited a power-law dependence with respect to density of the form: E* {proportional_to} {rho}*{sup n}, where n = 1.7. The modulus data is well described by a simple geometric model (attributed to the work of Gibson and Ashby) for closed-cell foam in which the stiffness of the foam is governed by the flexure of the cell struts and cell walls. The compressive strength of the foam is also found to follow a power-law behavior with respect to foam density. In this instance, Euler buckling is used to rationalize the density dependence. The modulus of the polyurethane foam was modified by addition of a gas atomized, spherical aluminum powder. Additions of 30 and 50 weight percent of the powder significantly increased the foam modulus. However, there were only slight increases in modulus with 5 and 10 weight percent additions of the metal powder. Strength was also slightly increased at high loading fractions of powder. This increase in modulus and strength could be predicted by combining the above geometric model with a well-known model describing the effect on modulus of a rigid dispersoid in a compliant matrix.

  11. A facile method for nickel catalyst immobilization on ultra fine Al{sub 2}O{sub 3} powders

    SciTech Connect (OSTI)

    Zhang, T. [School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)] [School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China); Wen, G., E-mail: wgw@hitwh.edu.cn [School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China); Huang, X.X.; Zhong, B.; Zhang, X.D.; Bai, H.W.; Yu, H.M. [School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)] [School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)

    2010-07-15T23:59:59.000Z

    A pure nickel coating has been successfully plated on the surface of ultra fine Al{sub 2}O{sub 3} particles via a facile electroless plating method. Coating morphology and crystallite size can be tailored by pH values. Dense coating with the maximum crystallite size of 24 nm was obtained at pH 11.0 and porous coating with the minimum crystallite size of 15 nm was obtained at pH value 12.5. The plated powders have been demonstrated to be an effective catalyst for growing boron nitride nanotubes.

  12. A study on in situ growth of TaC whiskers in Al{sub 2}O{sub 3} matrix powder for ceramic cutting tools

    SciTech Connect (OSTI)

    Zhao, Guolong [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China) [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China); Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education (China); Huang, Chuanzhen, E-mail: chuanzhenh@sdu.edu.cn [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China) [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China); Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education (China); Liu, Hanlian; Xu, Liang; Chong, Xuewen; Zou, Bin; Zhu, Hongtao [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China) [Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 (China); Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education (China)

    2012-08-15T23:59:59.000Z

    Graphical abstract: In situ growth of TaC whiskers (TaC{sub w}) was synthesized in an ?-Al{sub 2}O{sub 3} matrix powder via a carbothermal reduction technique. The whiskers were 0.2–0.5 ?m in diameter and 5–15 ?m in length; they were straight and had smooth surfaces. Highlights: ? In situ growth of TaC whiskers was synthesized in an ?-Al{sub 2}O{sub 3} matrix powder. ? The wet mixing method and 1450 °C were suitable for whiskers growth. ? The growth of TaC whiskers is not influenced by the Al{sub 2}O{sub 3} powder. ? The major impurities were TaC particles, nickel and unreacted carbon. -- Abstract: In situ growth of tantalum carbide (TaC) whiskers was synthesized in an ?-Al{sub 2}O{sub 3} matrix powder via a carbothermal reduction technique within a temperature range of 1350–1500 °C in an argon atmosphere. The starting materials consisted of Ta{sub 2}O{sub 5}, C, Ni and NaCl powders. Different mixing methods and various reaction temperatures were employed. Most of the prepared whiskers were 0.2–0.5 ?m in diameter and 5–15 ?m in length. The reaction temperature of 1400–1450 °C was suitable for the growth of TaC whiskers and a wet mixing method was beneficial to increase the whisker yield. Some of the whiskers exhibited the needle shape while others exhibited the screw shape. The growth mechanism of the whiskers was a complex mechanism involving a helical screw dislocation mechanism and a vapor–liquid–solid process. No obvious influences of the Al{sub 2}O{sub 3} matrix powder on the growth of TaC whiskers were found and the major impurities in the obtained powder were TaC particles, nickel and unreacted carbon.

  13. AN INVESTIGATION OF HYDROSTATIC EXTRUSION AND OTHER DEFORMATION MODES FOR THE FABRICATION OF MULTI-FILAMENTARY NIOBIUM-TIN SUPERCONDUCTORS BY A POWDER METALLURGY APPROACH

    E-Print Network [OSTI]

    MacLeod, G.E.

    2010-01-01T23:59:59.000Z

    SUPERCONDUCTORS BY A POWDER METALLURGY ApPROACH By GLEN EARLTin Superconductors by a Powder Metallurgy Approach TABLE OFSUPERCONDUCTORS BY A POWDER METALLURGY APPROACH Glen Earl

  14. Fabrication of NiTi shape memory alloy from elemental powders by hot isostatic pressing

    E-Print Network [OSTI]

    McNeese, Matthew Doyle

    1997-01-01T23:59:59.000Z

    The research involved in this thesis was conducted to develop a procedure for producing cylindrical specimens of NiTi shape memory alloy for mechanical testing from elemental powders by hot isostatic pressing. Powders were mixed to ratios of 50...

  15. E-Print Network 3.0 - acid whey powder Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    r a c t This paper describes controlled synthesis of Fe3O4 powder via... carbothermal reduction method using pure Fe2O3 powder and glucose mixture as starting materials. Pure Fe3O4...

  16. STUDIES OF DESIGN PARAMETERS IN THE FABRICATION OF Nb-Al-Ge SUPERCONDUCTORS BY THE POWDER METALLURGY INFILTRATION METHOD

    E-Print Network [OSTI]

    Granda, J.J.

    2010-01-01T23:59:59.000Z

    TicltcJ by a Powder Metallurgy Approach, (D. Eng. Thesis)SUPERCONDUCTORS BY THE POWDER METALLURGY INFILTRATION METHODBY TrIE POWDER METALLURGY INFILTRATION METHOD Jose J. Granda

  17. E-Print Network 3.0 - accreting brown dwarfs Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    << < 1 2 3 4 5 > >> 1 The University of Western Ontario DEPARTMENT OF PHYSICS AND ASTRONOMY Summary: : Accretion and dusty disks" ABSTRACT Young brown dwarfs appear to share...

  18. E-Print Network 3.0 - arctic endemic brown Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    results for: arctic endemic brown Page: << < 1 2 3 4 5 > >> 1 Southeast Alaska Conservation Assessment -Chapter 6.7 Page 1 Endemic Mammals of the Alexander Archipelago...

  19. Nonaqueous solution synthesis process for preparing oxide powders of lead zirconate titanate and related materials

    DOE Patents [OSTI]

    Voigt, J.A.; Sipola, D.L.; Tuttle, B.A.; Anderson, M.T.

    1999-06-01T23:59:59.000Z

    A process is disclosed for producing powders of perovskite-type compounds which comprises mixing a metal alkoxide solution with a lead acetate solution to form a homogeneous, clear metal solution, adding an oxalic acid/n-propanol solution to this metal solution to form an easily filterable, free-flowing precursor powder and then calcining this powder. This process provides fine perovskite-phase powders with ferroelectric properties which are particularly useful in a variety of electronic applications. 4 figs.

  20. Multi-Seam Well Completion Technology: Implications for Powder River Basin Coalbed Methane Production

    SciTech Connect (OSTI)

    Office of Fossil Energy; National Energy Technology Laboratory

    2003-09-01T23:59:59.000Z

    The purpose of this study is to evaluate the potential benefits of applying multiseam [well] completion (MSC) technology to the massive stack of low-rank coals in the Powder River Basin. As part of this, the study objectives are: Estimate how much additional CBM resource would become accessible and technically recoverable--compared to the current practice of drilling one well to drain a single coal seam; Determine whether there are economic benefits associated with MSC technology utilization (assuming its widespread, successful application) and if so, quantify the gains; Briefly examine why past attempts by Powder River Basin CBM operators to use MSC technology have been relatively unsuccessful; Provide the underpinnings to a decision whether a MSC technology development and/or demonstration effort is warranted by DOE. To a great extent, this assessment builds on the previously published study (DOE, 2002), which contains many of the key references that underlie this analysis. It is available on the U.S. Department of Energy, National Energy technology Laboratory, Strategic Center for Natural Gas website (www.netl.doe.gov/scng). It is suggested that readers obtain a copy of the original study to complement the current report.

  1. "Ceramics and high-temperature composites, silicides" Oxidation of Stainless Steel Powder

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    : Powder, stainless steel, oxidation INTRODUCTION Ceramic matrix composites dispersed with metal particles"Ceramics and high-temperature composites, silicides" CHTC9 Oxidation of Stainless Steel Powder. To understand the corrosion behavior of a model 304L(p)-ZrO2(s) composite, a 304L stainless steel powder has

  2. Controlling Brown Stomach Worms in Cattle by Management

    E-Print Network [OSTI]

    Faries Jr., Floron C.

    2002-02-05T23:59:59.000Z

    environment in the stomach for worms. Overcrowding and overgrazing pasture lead to poor nutrition of cattle and to poor sanita- tion. Excess manure and worm larvae contami- nate the pasture. Rain is needed to wash the larvae from the manure onto pasture where.... eggs passed in their manure become a con- tinual source of pasture contamination during the spring if weekly rains occur to wash the larvae from manure. To ensure cattle maintain noneconomic, low levels of brown stomach worms, feed a protein supplement...

  3. Time resolved spectroscopy of the variable brown dwarf Kelu-1

    E-Print Network [OSTI]

    F. J. Clarke; C. G. Tinney; S. T. Hodgkin

    2003-01-09T23:59:59.000Z

    We report the results of observations designed to investigate the spectroscopic signatures of dust clouds on the L2 brown dwarf Kelu-1. Time resolved medium resolution spectra show no significant evidence of variability in the dust sensitive TiO, CrH and FeH bandheads on the timescale of 1--24 hours. We do however report periodic variability in the psuedo-equivelent width of H-alpha consistent with the 1.8 hour rotation period previously reported for this object Clarke, Tinney & Tolley (2002). Near-contemporaneous I-band photometry shows evidence for non-periodic variability at the level of 2%.

  4. Brown County, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Areais a village in CookEnergyBrookwood,Illinois.Brown County,

  5. Brown County, Wisconsin: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Areais a village in CookEnergyBrookwood,Illinois.Brown

  6. Report on Characterization and Processing of MDD Powder

    SciTech Connect (OSTI)

    Luther, Erik Paul [Los Alamos National Laboratory

    2012-08-21T23:59:59.000Z

    Uranium oxide powers most civilian nuclear reactors worldwide. A large infrastructure based on a well-established technology is in place to support this strategic component of the energy industry. Because uranium oxide fuels are used so ubiquitously, it is expected that ceramic fuel pellets will continue to be used. A better understanding of the properties of the starting materials, the processing methods used to fabricate fuel pellets and how the properties of pellets change in service, are important aspects being studied via experiments, models and simulations. A close integration of these approaches is essential if we are to find new ways to optimize both the fuel composition and structure for the purpose of improving performance, e.g., designed microstructures, reducing process losses, e.g. by net shape sintering, and enabling reprocessing of used fuel; e.g., incorporation of transuranics. Ceramic oxide fuel pellets are typically cold pressed and sintered from a powder feedstock. Consequently, a complete understanding of pellet fabrication requires a thorough knowledge of the process from powder synthesis through quality control and acceptance. In this study, uranium oxide powder synthesized by Modified Direct Denitration (MDD) is evaluated. Use of powders synthesized by novel, simplified approaches such as MDD are both a challenge and an opportunity. The MDD synthesis process offers an opportunity to simplify the fabrication process potentially reducing process losses. MDD also provides a simple path to incorporate transuranics from used fuel reprocessing with minimal handling. The challenge is to demonstrate and ultimately prove the reliability and reproducibility of simplified processing with the performance of fuel pellets experiencing in-pile service. This report summarizes a processing study of uranium oxide pellets made from MDD uranium oxide.

  7. Low temperature fabrication from nano-size ceramic powders

    SciTech Connect (OSTI)

    Gonzalez, E.J.; Piermarini, G.J.; Hockey, B. [and others

    1995-06-01T23:59:59.000Z

    The objective of the compaction process is to produce a dense green-state compact from a nanosize powder that subsequently can be sintered at high temperatures to form a dense ceramic piece. High density in the green-state after pressing is of primary importance for achieving high densities after sintering. Investigation of the compaction behavior of ceramic powders, therefore, is an important part of characterization of raw ceramic powders and evaluation of their compaction behavior, analysis of interaction between particles, and the study of microstructure of green body (unsintered) during pressure-forming processes. The compaction of nanosize ceramic particles into high density green bodies is very difficult. For the nanosize materials used in this study (amorphous Si{sub 3}N{sub 4} and {gamma} Al{sub 2}O{sub 3}), there is no evidence by TEM of partial sintering after synthesis. Nevertheless, strong aggregation forces, such as the van der Waals surface forces of attraction, exist and result in moderate precursor particle agglomeration. More importantly, these attractive surface forces, which increase in magnitude with decreasing particle size, inhibit interparticle sliding necessary for particle rearrangement to denser bodies during subsequent compaction. Attempts to produce high density green body compacts of nanosize particles, therefore, generally have been focused on overcoming these surface forces of attraction by using either dispersive fluids or high pressures with or without lubricating liquids. In the present work, the use of high pressure has been employed as a means of compacting nanosize powders to relatively high green densities.

  8. Powder River Energy Corporation Smart Grid Project | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocusOskiPhilips ColorLoading map...ClimatePowder River

  9. Powder River, Wyoming: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine:Plug Power IncPowder River Energy Corporation Place:

  10. Ferromagnetic Resonance of Micro- and Nano-sized Hexagonal Ferrite Powders at Millimeter Waves

    SciTech Connect (OSTI)

    Korolev, Konstantin A.; McCloy, John S.; Afsar, Mohammed N.

    2012-02-22T23:59:59.000Z

    Complex magnetic permeability and dielectric permittivity of micro- and nano-sized powdered barium (BaFe{sub 12}O{sub 19}) and strontium (SrFe{sub 12}O{sub 19}) hexaferrites have been studied in a broadband millimeter wave frequency range (30-120 GHz). Transmittance measurements have been performed using a free space quasi-optical millimeter wave spectrometer, equipped with a set of high power backward wave oscillators. Real and imaginary parts of dielectric permittivity for both types of micro- and nanoferrites have been calculated using analysis of recorded high precision transmittance spectra. Frequency dependences of the magnetic permeability have been obtained from Schloemann's equation for partially magnetized ferrites. These materials show promise as tunable millimeter wave absorber, based on their size-dependent absorption.

  11. An electrochemical cell for in operando studies of lithium/sodium batteries using a conventional x-ray powder diffractometer

    SciTech Connect (OSTI)

    Shen, Yanbin; Pedersen, Erik E.; Christensen, Mogens; Iversen, Bo B., E-mail: bo@chem.au.dk [Center for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Aarhus (Denmark)

    2014-10-15T23:59:59.000Z

    An electrochemical cell has been designed for powder X-ray diffraction studies of lithium ion batteries (LIB) and sodium ion batteries (SIB) in operando with high time resolution using a conventional powder X-ray diffractometer. The cell allows for studies of both anode and cathode electrode materials in reflection mode. The cell design closely mimics that of standard battery testing coin cells and allows obtaining powder X-ray diffraction patterns under representative electrochemical conditions. In addition, the cell uses graphite as the X-ray window instead of beryllium, and it is easy to operate and maintain. Test examples on lithium insertion/extraction in two spinel-type LIB electrode materials (Li{sub 4}Ti{sub 5}O{sub 12} anode and LiMn{sub 2}O{sub 4} cathode) are presented as well as first results on sodium extraction from a layered SIB cathode material (Na{sub 0.84}Fe{sub 0.56}Mn{sub 0.44}O{sub 2})

  12. The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator for Ag Contamination in Tropical Coastal Waters

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator determined in the brown alga Lobophora variegata, using radiotracer techniques. Results indicate that this widely distributed alga could be a useful bioindicator species for surveying silver contamination

  13. Optical Flow Estimation using Laplacian Mesh Energy Wenbin Li Darren Cosker Matthew Brown Rui Tang

    E-Print Network [OSTI]

    Martin, Ralph R.

    Optical Flow Estimation using Laplacian Mesh Energy Wenbin Li Darren Cosker Matthew Brown Rui Tang.p.cosker,m.brown,r.tang}@bath.ac.uk Abstract In this paper we present a novel non-rigid optical flow algorithm for dense image correspondence and non-rigid registration. The algorithm uses a unique Laplacian Mesh Energy term to encourage local

  14. Pollution-induced behavioural effects in the brown bullhead (Ameiurus nebulosus)

    E-Print Network [OSTI]

    Neff, Bryan D.

    Pollution-induced behavioural effects in the brown bullhead (Ameiurus nebulosus) Ross D. Breckels on biodiversity. Thus, it is important to understand the nature of pollution- induced change in aquatic ecosystems. We show that brown bullheads (Ameiurus nebulosus) may have evolved in response to chronic pollution

  15. Anaerobic Co-digestion of Brown Water and Food Waste for Energy Recovery

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    waste. Keywords Anaerobic digestion; food waste; brown water; biogas; co-digestion INTRODUCTION-cal/m3 , biogas has been widely used in heating digesters and gas engines (Wang et al., 2007LIM J.W. Anaerobic Co-digestion of Brown Water and Food Waste for Energy Recovery Jun Wei LIM

  16. Capping the Brown Energy Consumption of Internet Services at Low Cost

    E-Print Network [OSTI]

    Capping the Brown Energy Consumption of Internet Services at Low Cost Kien T. Le Ricardo Bianchini Consumption of Data Centers 0 20 40 60 80 100 120 140 2000 2006 2011 Electricity consumption of US DCs Billion Energy Consumption · Improving efficiency does not promote green energy or guarantee limits on brown

  17. Capping the Brown Energy Consumption of Internet Services at Low Cost

    E-Print Network [OSTI]

    energy" (produced via carbon-intensive means) relative to renewable or "green" energy. This paper their brown energy consumption and lever- age green energy, while respecting their SLAs and minimizing energy-intensive energy as "brown" energy, in contrast with "green" or renewable energy.) We argue that placing caps

  18. A review of "Sir Thomas Browne: A Life" by Reid Barbour

    E-Print Network [OSTI]

    Todd, Richard

    2014-01-01T23:59:59.000Z

    26) cites recent scholarship (1998-99) that refutes this early nineteenth-century orthodoxy. Right from the start Barbour enters Browne’s world of words in portraying that life as a “miracle,” a “fable” or “peece of Poetry.” From 1637, after...

  19. PPl 15: The First Brown Dwarf Spectroscopic Binary

    E-Print Network [OSTI]

    Gibor Basri; Eduardo Martin

    1999-08-02T23:59:59.000Z

    PPl 15 is the first object to have been confirmed as a brown dwarf by the lithium test (in 1995), though its inferred mass was very close to the substellar limit. It is a member of the Pleiades open cluster. Its position in a cluster color-magnitude diagram suggested that it might be binary, and preliminary indications that it is a double-lined spectroscopic binary were reported by us in 1997. Here we report on the results of a consecutive week of Keck HIRES observations of this system, which yield its orbit. It has a period of about 5.8 days, and an eccentricity of 0.4+/-0.05. The rotation of the stars is slow for this class of objects. Because the system luminosity is divided between 2 objects with a mass ratio of 0.85, this renders each of them an incontrovertible brown dwarf, with masses between 60-70 jupiters. We show that component B is a little redder than A by studying their wavelength-dependent line ratios, and that this variation is compatible with the mass ratio. We confirm that the system has lithium, but cannot support the original conclusion that it is depleted (which would be surprising, given the new masses). This is a system of very close objects which, if they had combined, would have produced a low mass star. We discuss the implications of this discovery for the theories of binary formation and formation of very low mass objects.

  20. PPl 15 The First Brown Dwarf Spectroscopic Binary

    E-Print Network [OSTI]

    Basri, G S; Basri, Gibor; Martin, Eduardo

    1999-01-01T23:59:59.000Z

    PPl 15 is the first object to have been confirmed as a brown dwarf by the lithium test (in 1995), though its inferred mass was very close to the substellar limit. It is a member of the Pleiades open cluster. Its position in a cluster color-magnitude diagram suggested that it might be binary, and preliminary indications that it is a double-lined spectroscopic binary were reported by us in 1997. Here we report on the results of a consecutive week of Keck HIRES observations of this system, which yield its orbit. It has a period of about 5.8 days, and an eccentricity of 0.4+/-0.05. The rotation of the stars is slow for this class of objects. Because the system luminosity is divided between 2 objects with a mass ratio of 0.85, this renders each of them an incontrovertible brown dwarf, with masses between 60-70 jupiters. We show that component B is a little redder than A by studying their wavelength-dependent line ratios, and that this variation is compatible with the mass ratio. We confirm that the system has lith...

  1. Brown oculocutaneous albinism is allelic to tyrosinase-positive oculocutaneous albinism in southern African Negroids

    SciTech Connect (OSTI)

    Manga, P.; Ramsay, M.; Kromberg, J.; Jenkins, T. [Univ. of the Witwatersrand, Johannesburg (South Africa)

    1994-09-01T23:59:59.000Z

    Brown oculocutaneous albinism (BOCA) is an autosomal recessive disorder involving a decrease in pigment of the skin, hair and eyes as well as decreased visual acuity. Evidence from two families who have co-existent BOCA and tyrosinase-positive oculocutaneous albinism (ty-pos OCA), suggests that the two conditions are allelic. Ty-pos OCA has been mapped to chromosome 15q11-q12 and the gene has been confirmed to be the human homologue (P) of the mouse pink-eyed dilute gene (p). Seven markers known to be linked to the P gene, D15S11, D15S10, MS14, GABA3, GABA5, IR10 and pCMW-1, were used to construct haplotypes in 5 families with BOCA. The haplotype data was subjected to linkage analysis and a maximum lod score of 2.85 ({theta} 0.0) was obtained. It has been reported previously that BOCA, in an Afro-American, was due to the lack of tyrosinase-protein 1 (Trp-1) in melanocytes. Trp-1 has been excluded as the disease-causing locus in the southern African families by linkage analysis with D9S43. A lod score of -2.02 was obtained at {theta} = 0.02.

  2. Rheological properties of water-coal slurries based on brown coal in the presence of sodium lignosulfonates and alkali

    SciTech Connect (OSTI)

    D.P. Savitskii; A.S. Makarov; V.A. Zavgorodnii [National Academy of Sciences of Ukraine, Kiev (Ukraine). Dumanskii Institute of Colloid and Water Chemistry

    2009-07-01T23:59:59.000Z

    The effect of the oxidized surface of brown coal on the structural and rheological properties of water-coal slurries was found. The kinetics of structure formation processes in water-coal slurries based on as-received and oxidized brown coal was studied. The effect of lignosulfonate and alkali additives on the samples of brown coal was considered.

  3. The Brown-dwarf Atmosphere Monitoring (BAM) Project II: Multi-epoch monitoring of extremely cool brown dwarfs

    E-Print Network [OSTI]

    Rajan, A; Wilson, P A; Bulger, J; De Rosa, R J; Ward-Duong, K; Morley, C; Pont, F; Windhorst, R

    2015-01-01T23:59:59.000Z

    With the discovery of Y dwarfs by the WISE mission, the population of field brown dwarfs now extends to objects with temperatures comparable to those of Solar System planets. To investigate the atmospheres of these newly identified brown dwarfs, we have conducted a pilot study monitoring an initial sample of three late T-dwarfs (T6.5, T8 and T8.5) and one Y-dwarf (Y0) for infrared photometric variability at multiple epochs. With J-band imaging, each target was observed for a period of 1.0h to 4.5h per epoch, which covers a significant fraction of the expected rotational period. These measurements represent the first photometric monitoring for these targets. For three of the four targets (2M1047, Ross 458C and WISE0458), multi-epoch monitoring was performed, with the time span between epochs ranging from a few hours to ~2 years. During the first epoch, the T8.5 target WISE0458 exhibited variations with a remarkable min-to-max amplitude of 13%, while the second epoch light curve taken ~2 years later did not not...

  4. Effect of coating time on corrosion behavior of electroless nickel-phosphorus coated powder metallurgy iron specimens

    SciTech Connect (OSTI)

    Singh, D.; Balasubramaniam, R.; Dube, R.K. [Indian Inst. of Tech., Kanpur (India). Dept. of Materials and Metallurgical Engineering

    1995-08-01T23:59:59.000Z

    Powder metallurgy iron specimens with porosities in the range 0% to 2% were electroless coated with nickel-phosphorus alloy from baths containing sodium hypophosphite (NaH{sub 2}PO{sub 2}{center_dot}H{sub 2}O). The effect of coating time on thickness and phosphorus content of the deposit was analyzed. The free corrosion potentials and corrosion rates of the coated specimens were obtained by the Tafel extrapolation method in 1.0 M hydrochloric acid (HCl) solution. Corrosion rates of the coated specimens after heat treatment also were studied. The observed corrosion characteristics were explained by the mixed-potential theory.

  5. Structural studies of magnesium nitride fluorides by powder neutron diffraction

    SciTech Connect (OSTI)

    Brogan, Michael A. [School of Chemistry, University of Nottingham, Nottingham NG7 2RD (United Kingdom); Hughes, Robert W. [WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Smith, Ronald I. [ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX (United Kingdom); Gregory, Duncan H., E-mail: Duncan.Gregory@glasgow.ac.uk [WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ (United Kingdom)

    2012-01-15T23:59:59.000Z

    Samples of ternary nitride fluorides, Mg{sub 3}NF{sub 3} and Mg{sub 2}NF have been prepared by solid state reaction of Mg{sub 3}N{sub 2} and MgF{sub 2} at 1323-1423 K and investigated by powder X-ray and powder neutron diffraction techniques. Mg{sub 3}NF{sub 3} is cubic (space group: Pm3m) and has a structure related to rock-salt MgO, but with one cation site vacant. Mg{sub 2}NF is tetragonal (space group: I4{sub 1}/amd) and has an anti-LiFeO{sub 2} related structure. Both compounds are essentially ionic and form structures in which nitride and fluoride anions are crystallographically ordered. The nitride fluorides show temperature independent paramagnetic behaviour between 5 and 300 K. - Graphical abstract: Definitive structures of the ternary magnesium nitride fluorides Mg{sub 3}NF{sub 3} and the lower temperature polymorph of Mg{sub 2}NF have been determined from powder neutron diffraction data. The nitride halides are essentially ionic and exhibit weak temperature independent paramagnetic behaviour. Highlights: Black-Right-Pointing-Pointer Definitive structures of Mg{sub 3}NF{sub 3} and Mg{sub 2}NF were determined by neutron diffraction. Black-Right-Pointing-Pointer Nitride and fluoride anions are crystallographically ordered in both structures. Black-Right-Pointing-Pointer Both compounds exhibit weak, temperature independent paramagnetic behaviour. Black-Right-Pointing-Pointer The compounds are essentially ionic with ionicity increasing with F{sup -} content.

  6. MARVELS-1b: A Short-Period, Brown Dwarf Desert Candidate from the SDSS-III MARVELS Planet Search

    E-Print Network [OSTI]

    Lee, Brian L; Fleming, Scott W; Stassun, Keivan G; Gaudi, B Scott; Barnes, Rory; Mahadevan, Suvrath; Eastman, Jason D; Wright, Jason; Siverd, Robert J; Gary, Bruce; Ghezzi, Luan; Laws, Chris; Wisniewski, John P; de Mello, G F Porto; Ogando, Ricardo L C; Maia, Marcio A G; da Costa, Luiz Nicolaci; Sivarani, Thirupathi; Pepper, Joshua; Nguyen, Duy Cuong; Hebb, Leslie; De Lee, Nathan; Wang, Ji; Wan, Xiaoke; Zhao, Bo; Chang, Liang; Groot, John; Varosi, Frank; Hearty, Fred; Hanna, Kevin; van Eyken, J C; Kane, Stephen R; Agol, Eric; Bizyaev, Dmitry; Bochanski, John J; Brewington, Howard; Chen, Zhiping; Costello, Erin; Dou, Liming; Eisenstein, Daniel J; Fletcher, Adam; Ford, Eric B; Guo, Pengcheng; Holtzman, Jon A; Jiang, Peng; Leger, R French; Liu, Jian; Long, Daniel C; Malanushenko, Elena; Malanushenko, Viktor; Malik, Mohit; Oravetz, Daniel; Pan, Kaike; Rohan, Pais; Schneider, Donald P; Shelden, Alaina; Snedden, Stephanie A; Simmons, Audrey; Weaver, B A; Weinberg, David H; Xie, Ji-Wei

    2010-01-01T23:59:59.000Z

    We present a new short-period brown dwarf candidate around the star TYC 1240-00945-1. This candidate was discovered in the first year of the Multi-object APO Radial Velocity Exoplanets Large-area Survey (MARVELS), which is part of the third phase of the Sloan Digital Sky Survey (SDSS-III), and we designate the brown dwarf as MARVELS-1b. MARVELS uses the technique of dispersed fixed-delay interferometery to simultaneously obtain radial velocity measurements for 60 objects per field using a single, custom-built instrument that is fiber fed from the SDSS 2.5-m telescope. From our 20 radial velocity measurements spread over a ~370 d time baseline, we derive a Keplerian orbital fit with semi-amplitude K=2.533+/-0.025 km/s, period P=5.8953+/-0.0004 d, and eccentricity consistent with circular. Independent follow-up radial velocity data confirm the orbit. Adopting a mass of 1.37+/-0.11 M_Sun for the slightly evolved F9 host star, we infer that the companion has a minimum mass of 28.0+/-1.5 M_Jup, a semimajor axis 0....

  7. Bulk synthesis of nanoporous palladium and platinum powders

    DOE Patents [OSTI]

    Robinson, David B; Fares, Stephen J; Tran, Kim L; Langham, Mary E

    2014-04-15T23:59:59.000Z

    Disclosed is a method for providing nanoporous palladium and platinum powders. These materials were synthesized on milligram to gram scales by chemical reduction of tetrahalo-complexes with ascorbate in a concentrated aqueous surfactant at temperatures between -20.degree. C. and 30.degree. C. The prepared particles have diameters of approximately 50 nm, wherein each particle is perforated by pores having diameters of approximately 3 nm, as determined by electron tomography. These materials are of potential value for hydrogen and electrical charge storage applications.

  8. Powder River Energy Corporation (Montana) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocusOskiPhilips ColorLoading map...ClimatePowder River Energy

  9. QER - Comment of Powder River Energy Corporation | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15,2015 | DepartmentLoans | Department of Energy20 1 196Powder

  10. Bulk synthesis of nanoporous palladium and platinum powders

    DOE Patents [OSTI]

    Robinson, David B. (Fremont, CA); Fares, Stephen J. (Pleasanton, CA); Tran, Kim L. (Livermore, CA); Langham, Mary E. (Pleasanton, CA)

    2012-04-17T23:59:59.000Z

    Disclosed is a method for providing nanoporous palladium and platinum powders. These materials were synthesized on milligram to gram scales by chemical reduction of tetrahalo-complexes with ascorbate in a concentrated aqueous surfactant at temperatures between -20.degree. C. and 30.degree. C. The prepared particles have diameters of approximately 50 nm, wherein each particle is perforated by pores having diameters of approximately 3 nm, as determined by electron tomography. These materials are of potential value for hydrogen and electrical charge storage applications.

  11. Periodic photometric variability of the brown dwarf Kelu-1

    E-Print Network [OSTI]

    F. J. Clarke; C. G. Tinney; K. R. Covey

    2002-01-10T23:59:59.000Z

    We have detected a strong periodicity of 1.80+/-0.05 hours in photometric observations of the brown dwarf Kelu-1. The peak-to-peak amplitude of the variation is ~1.1% (11.9+/-0.8 mmag) in a 41nm wide filter centred on 857nm and including the dust/temperature sensitive TiO & CrH bands. We have identified two plausible causes of variability: surface features rotating into- and out-of-view and so modulating the light curve at the rotation period; or, elliposidal variability caused by an orbiting companion. In the first scenario, we combine the observed vsin(i) of Kelu-1 and standard model radius to determine that the axis of rotation is inclined at 65+/-12 degrees to the line of sight.

  12. Hanbury-Brown--Twiss analysis in a solvable model

    SciTech Connect (OSTI)

    Bertsch, G.F.; Danielewicz, P.; Herrmann, M. (Institute for Nuclear Theory, HN-12, University of Washington, Seattle, Washington 98195 (United States) Physics Department, FM-15, University of Washington, Seattle, Washington 98195 (United States) Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States))

    1994-01-01T23:59:59.000Z

    The analysis of meson correlations by Hanbury-Brown--Twiss interferometry is tested with a simple model of meson production by resonance decay. We derive conditions which should be satisfied in order to relate the measured momentum correlation to the classical source size. The Bose correlation effects are apparent in both the ratio of meson pairs to singles and in the ratio of like to unlike pairs. With our parameter values, we find that the single particle distribution is too distorted by the correlation to allow a straightforward analysis using pair correlation normalized by the singles rates. An analysis comparing symmetrized to unsymmetrized pairs is more robust, but nonclassical off-shell effects are important at realistic temperatures.

  13. Carbon Dioxide Sorption Isotherms and Matrix Transport Rates for Non-Powdered Coal

    SciTech Connect (OSTI)

    Smith, D.H.; Jikich, S.; Seshadri, K.

    2007-05-01T23:59:59.000Z

    For enhanced coalbed methane/carbon dioxide sequestration field projects, carbon dioxide isotherms and the rate of diffusion of the carbon dioxide from the cleats into the matrix are important parameters for predicting how much carbon dioxide actually will be sequestered under various operating conditions. Manometric (or pressure swing) experiments on powdered coal provide a quick, simple, and relatively inexpensive method for measuring sorption isotherms. However, determination of the rate of transport from cleat into matrix from the rate of gas pressure drop is difficult, if not impossible. (The characteristic time constant for the transport depends on the cleat spacing as well as the rate of diffusion.) Manometric measurements often yield isotherms that are extremely problematic in the region of the carbon dioxide critical point; perhaps even worse, available data seem to indicate that the sorption isotherms measured for powders are much larger than the isotherms of coal cores. Measurements on centimeter-sized samples can take weeks or months to reach equilibrium; for such equilibration times gas leakage rates that would be of no significance in powdered-coal measurements can completely invalidate manometric measurements on coal cores. We have tested and used a simple, inexpensive method for measuring isotherms and carbon dioxide transport rates in coal cores. One or more cores are placed in a simple pressure vessel, and a constant pressure is maintained in the vessel by connecting it to a gas supply (which contains a very large amount of gas compared to amount that could leak over the course of the experiment). From time to time the gas supply is shut off, the sample is removed, and its weight is recorded at ambient pressure at frequent time intervals for a period of about one hour. The sample is then returned to the pressure vessel, the carbon dioxide pressure restored to its previous value, and the equilibration resumed until the next sample weighing. For a point on the isotherm, the process is repeated until the sample weight reaches a constant value (i.e., typically equilibration times of several weeks). The slope of a plot of sample weight vs. square root of elapsed desorption time gives a measurement for the rate of diffusion. In order to advance all three experimental methods, results from this “ambient-pressure gravimetry” method were compared with data obtained by conventional manometry and by computer tomography. The isotherm and “diffusion” rate measured for the core can be directly used in simulators for reservoir engineering studies of coalseam sequestration and enhanced coalbed methane production.

  14. Densification of nanosized alumina powders by hot isostatic pressing (HIP)

    SciTech Connect (OSTI)

    Weimar, P.; Knitter, R.; Szabo, D.V. [Forschungszentrum, Karlsruhe (Germany); Krauss, W.

    1996-12-31T23:59:59.000Z

    The densification of nanosized alumina powders to compacts of nearly theoretical density by Hot Isostatic Pressing was the aim of this work. Three types of powders produced by the so called exploding wire technique in the mesh size between 20 to 80 nm were used. Because of the big internal friction during dry pressing the densities achieved were only in the range of about 30% TD. Therefore it was necessary to use a second post densification step by cold isostatic pressing (CIP). With pressures as high as 750 MPa the authors received a density of 58% TD. The pellets were sealed in capsules of stainless steel which were densified at different temperatures between 900 C and 1,350 C with pressures between 120 and 300 MPa. The resulting compacts were examined by scanning electron microscopy. The resulting phases were determined by X-ray diffraction. Grain size measurement at the as fabricated compacts was a decisive criterion for the success of the experiments.

  15. Helium/solid powder O-ring leakage correlation experiments

    SciTech Connect (OSTI)

    Leisher, W.B.; Weissman, S.H.; Tallant, D.R.; Kubo, M.

    1983-01-01T23:59:59.000Z

    We have developed a method to test powder leakage that has passed O-ring seals. To validate this method we have spiked a test fixture with 98 ng of U and recovered 130 +- 25 ng of U. We did not detect U at a detection limit of 26 ng in a fixture which was treated as a blank. This method has been applied to the leakage of UO/sub 2/ powder passing the type of EPDM O-ring seals used in a SNM shipping cask belonging to PNC. Considering the three experimental tests in which no or very small quantities of U were detected as effective blank test, it appears that the level of external contamination is negligible. Therefore, we believe that the U quantities greater than 26 ng (6 tests) passed the primary O-ring seal. From this limited quantity of data, we observe no apparent correlation between the amount of U measured and either helium leak rate or equivalent tube diameter. The data for the 130/sup 0/C tests indicate the possibility of a U/time relationship; however, more data are needed for verification.

  16. Production and Characterization of Atomized U-Mo Powder by the Rotating Electrode Process

    SciTech Connect (OSTI)

    C.R. Clark; B.R. Muntifering; J.F. Jue

    2007-09-01T23:59:59.000Z

    In order to produce feedstock fuel powder for irradiation testing, the Idaho National Laboratory has produced a rotating electrode type atomizer to fabricate uranium-molybdenum alloy fuel. Operating with the appropriate parameters, this laboratory-scale atomizer produces fuel in the desired size range for the RERTR dispersion experiments. Analysis of the powder shows a homogenous, rapidly solidified microstructure with fine equiaxed grains. This powder has been used to produce irradiation experiments to further test adjusted matrix U-Mo dispersion fuel.

  17. Fabrication of Al{sub 2}O{sub 3}-20 vol.% Al nanocomposite powders using high energy milling and their sinterability

    SciTech Connect (OSTI)

    Zawrah, M.F., E-mail: mzawrah@hotmail.com [National Research Center, Ceramics Department (Egypt); Abdel-kader, H.; Elbaly, N.E. [Mechanical Engineering Department, Faculty of Engineering, Helwan University (Egypt)] [Mechanical Engineering Department, Faculty of Engineering, Helwan University (Egypt)

    2012-03-15T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer Al{sub 2}O{sub 3}/Al nanocomposite powders were prepared via high energy ball milling. After 20 h milling, the size of Al{sub 2}O{sub 3}-20 vol.% Al nanocomposite particles was in the range of 23-29 nm. A uniform distribution of nanosized Al reinforcement throughout the Al{sub 2}O{sub 3} matrix, coating the particles was successfully obtained. Black-Right-Pointing-Pointer There was no any sign of phase changes during the milling. A competition between the cold welding mechanism and the fracturing mechanism were found during milling and finally the above two mechanisms reached an equilibrium. Black-Right-Pointing-Pointer The highest value of relative density was obtained for the sintered bodies at 1500 Degree-Sign C. Black-Right-Pointing-Pointer The harness of the sintered composite was decreased while the fracture toughness was improved after addition Al into alumina. -- Abstract: In this study, alumina-based matrix nanocomposite powders reinforced with Al particles were fabricated and investigated. The sinterability of the prepared nanocomposite powder at different firing temperature was also conducted. Their mechanical properties in terms of hardness and toughness were tested. Alumina and aluminum powder mixtures were milled in a planetary ball mill for various times up to 30 h in order to produce Al{sub 2}O{sub 3}-20% Al nanocomposite. The phase composition, morphological and microstructural changes during mechanical milling of the nanocomposite particles were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) techniques, respectively. The crystallite size and internal strain were evaluated by XRD patterns using Scherrer methods. A uniform distribution of the Al reinforcement in the Al{sub 2}O{sub 3} matrix was successfully obtained after milling the powders. The results revealed that there was no any sign of phase changes during the milling. The crystal size decreased with the prolongation of milling times, while the internal strain increased. A simple model is presented to illustrate the mechanical alloying of a ductile-brittle component system. A competition between the cold welding mechanism and the fracturing mechanism were found during powder milling and finally the above two mechanisms reached an equilibrium. The maximum relative density was obtained at 1500 Degree-Sign C. The harness of the sintered composite was decreased while the fracture toughness was improved after addition Al into alumina.

  18. PARALLAXES AND PROPER MOTIONS OF ULTRACOOL BROWN DWARFS OF SPECTRAL TYPES Y AND LATE T

    SciTech Connect (OSTI)

    Marsh, Kenneth A.; Kirkpatrick, J. Davy; Gelino, Christopher R.; Griffith, Roger L. [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States)] [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Wright, Edward L. [Department of Physics and Astronomy, UCLA, P.O. Box 951547, Los Angeles, CA 90095 (United States)] [Department of Physics and Astronomy, UCLA, P.O. Box 951547, Los Angeles, CA 90095 (United States); Cushing, Michael C. [Department of Physics and Astronomy, The University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606 (United States)] [Department of Physics and Astronomy, The University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606 (United States); Skrutskie, Michael F. [Department of Astronomy, University of Virginia, Charlottesville, VA 22904 (United States)] [Department of Astronomy, University of Virginia, Charlottesville, VA 22904 (United States); Eisenhardt, Peter R., E-mail: ken.marsh@astro.cf.ac.uk [NASA Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)

    2013-01-10T23:59:59.000Z

    We present astrometric measurements of 11 nearby ultracool brown dwarfs of spectral types Y and late-T, based on imaging observations from a variety of space-based and ground-based telescopes. These measurements have been used to estimate relative parallaxes and proper motions via maximum likelihood fitting of geometric model curves. To compensate for the modest statistical significance ({approx}< 7) of our parallax measurements we have employed a novel Bayesian procedure for distance estimation which makes use of an a priori distribution of tangential velocities, V {sub tan}, assumed similar to that implied by previous observations of T dwarfs. Our estimated distances are therefore somewhat dependent on that assumption. Nevertheless, the results have yielded distances for five of our eight Y dwarfs and all three T dwarfs. Estimated distances in all cases are {approx}> 3 pc. In addition, we have obtained significant estimates of V {sub tan} for two of the Y dwarfs; both are <100 km s{sup -1}, consistent with membership in the thin disk population. Comparison of absolute magnitudes with model predictions as a function of color shows that the Y dwarfs are significantly redder in J - H than predicted by a cloud-free model.

  19. E-Print Network 3.0 - au powder surfaces Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mathematics 86 UNCORRECTEDPROOF MSA 21109 19 Summary: size distribution analyzer3 at Praxair 152 Surface Technologies Inc. Both of the powder types had... -xxx Effect of initial...

  20. Multi-scale analysis and simulation of powder blending in pharmaceutical manufacturing

    E-Print Network [OSTI]

    Ngai, Samuel S. H

    2005-01-01T23:59:59.000Z

    A Multi-Scale Analysis methodology was developed and carried out for gaining fundamental understanding of the pharmaceutical powder blending process. Through experiment, analysis and computer simulations, microscopic ...

  1. Investigation of a novel passivation technique for gas atomized magnesium powders.

    E-Print Network [OSTI]

    Steinmetz, Andrew Douglas

    2011-01-01T23:59:59.000Z

    ??Gas atomized magnesium powders are critical for the production of a wide variety of flares, tracer projectiles, and other munitions for the United States military,… (more)

  2. Energy efficiency opportunities within the powder coating industry - Energy audit and pinch analysis.

    E-Print Network [OSTI]

    Bergek, Charlotte

    2011-01-01T23:59:59.000Z

    ??The powder coating industries in Sweden use about 525 GWh of energy every year. The need to reduce the energy use is increasing due to… (more)

  3. E-Print Network 3.0 - amorphous aluminum powder Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    slag... by limestone powder and BFS can lower the cost and enhance the greenness of concrete, since the production Source: Li, Victor C. - Departments of Civil and Environmental...

  4. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    Recommendation 6 Redwood Coast Energy Authority Northwest California Alternative Fuels Readiness Project $300 Alternative Fuel Readiness Proposed Awards California Energy Commission Alternative and Renewable FuelSTATE OF CALIFORNIA ­ NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  5. E-Print Network 3.0 - anadromous brown trout Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search Sample search results for: anadromous brown trout Page: << < 1 2 3 4 5 > >> 1 J. Fish Biol. (1987)31, 143-146 Mating of anadromousAtlanticsalmon, Salmo salar L., with...

  6. Brown Bag Lunch Tuesday, October 23, 12:15-1:15

    E-Print Network [OSTI]

    Brown Bag Lunch Tuesday, October 23, 12:15-1:15 Open Access: How does it impact teaching Campbell, Kathleen MacKenzie, Glenna Quinn Open Access has been both hailed as the answer to unrestricted

  7. LETTER doi:10.1038/nature12771 Efficient ethanol production from brown macroalgae

    E-Print Network [OSTI]

    Cai, Long

    Asteromyces cruciatus4 . The genomic integration and overexpression of the gene encodingthis transporter not contain lignin, simple biorefinery processes such as milling, leaching and extraction can separate sustainable food production13 (see Supplementary Discussion for a brown macroalgae biorefinery description

  8. New Zealand lessons may aid efforts to control light brown apple moth in California

    E-Print Network [OSTI]

    Varela, Lucia G.; Walker, James T.S.; Lo, Peter L; Rogers, David J

    2010-01-01T23:59:59.000Z

    1975. Integrated control of apple pests in New Zealand. 1.of the light brown apple moth Epiphyas postvittana (Walker),685–92. Dumbleton L J. 1932. The apple leaf-roller (Tortrix

  9. The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    Introduction to Engineering Computation · STAT 310 Probability and Statistics · STAT 410 Introduction246 Statistics The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD Course engineering, computational and applied mathematics, managerial studies, mathematics, political science

  10. The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    Introduction to Engineering Computation · STAT 310 Probability and Statistics · STAT 410 Introduction253 Statistics The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD Course engineering, computational and applied mathematics, managerial studies, mathematics, political science

  11. Variability and change in the Canadian cryosphere C. Derksen & S. L. Smith & M. Sharp & L. Brown &

    E-Print Network [OSTI]

    Variability and change in the Canadian cryosphere C. Derksen & S. L. Smith & M. Sharp & L. Brown-mail: Chris.Derksen@ec.gc.ca S. L. Smith :J. Bourgeois Geological Survey of Canada, Natural Resources Canada

  12. Two Writers Sharing: Sterling A. Brown, Robert Frost, and In "Dives's Dive"

    E-Print Network [OSTI]

    Tidwell, John E.

    1997-09-01T23:59:59.000Z

    Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Two writers sharing: Sterling A. Brown, Robert Frost, and "in dives' dive Tidwell, John Edgar African American Review; Fall 1997; 31, 3; Pro...

  13. Civil and Environmental Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    ) environmental engineering (air and water quality, transport theory, modeling, and energy) (2) hydrology) urbaninfrastructureandmanagement(transportationsystems,complex urban systems, soil mechanics, engineering economics, management1 Civil and Environmental Engineering The George R. Brown School of Engineering Chair Pedro J. J

  14. Brown is the color of many things: a collection of short stories

    E-Print Network [OSTI]

    Gupta, Chandralekha

    2000-01-01T23:59:59.000Z

    BROWN IS THE COLOR OF MANY THINGS: A COLLECTION OF SHORT STORIES A Thesis by CHANDRALEKHA GUPTA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF ARTS... May 2000 Major Subject: English BROWN IS THE COLOR OF MANY THINGS: A COLLECTION OF SHORT STORIES A Thesis by CHANDRALEKHA GUPTA Submitted to Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF ARTS...

  15. High Pressure Neutron Powder Diffraction Study of Superhydrated Natrolite

    SciTech Connect (OSTI)

    Colligan,M.; Lee, Y.; Vogt, T.; Celestian, A.; Parise, J.; Marshall, W.; Hriljac, J.

    2005-01-01T23:59:59.000Z

    Neutron powder diffraction data were collected on a sample of natrolite and a 1:1 (v/v) mixture of perdeuterated methanol and water at a pressure of 1.87(11) GPa. The natrolite sample was superhydrated, with a water content double that observed at ambient pressure. All of the water deuterium atoms were located and the nature and extent of the hydrogen bonding elucidated for the first time. This has allowed the calculation of bond valence sums for the water oxygen atoms, and from this, it can be deduced that the key energetic factor leading to loss of the additional water molecule upon pressure release is the poor coordination to sodium cations within the pores.

  16. The iron powder test for naphthenic acid corrosion studies

    SciTech Connect (OSTI)

    Hau, J.L.; Yepez, O.; Specht, M.I.; Lorenzo, R. [PDVSA-Intevep, Caracas (Venezuela)

    1999-11-01T23:59:59.000Z

    In the course of an ongoing investigation into the phenomenon of naphthenic acid corrosion, a new test method has evolved and is currently being further developed to substitute the total acid number (TAN or neutralization number) as an indicator for naphthenic acid corrosion potential. It can also be used to complement conventional autoclave corrosion tests in high temperature environments, which are based on weight loss of steel coupons. In this new method an oil sample reacts with pure iron powder within an autoclave heated to the testing temperature. The result is based on the amount of dissolved iron found in the oil sample. The oil sample can dissolve an amount of iron for a given time at a given temperature, depending on the naphthenic acid corrosion, since these acids react with iron to produce oil soluble iron naphthenates. This paper describes the method, compares it with conventional crude corrosiveness testing, and proposes it as a new way of measuring naphthenic acid corrosion potential.

  17. Shutdown mechanisms for a hypothetical criticality accident involving HEU powder: Preliminary results

    SciTech Connect (OSTI)

    Bentley, C.; Basoglu, B.; Dunn, M.; Plaster, M.; Ruggles, A.; Wilkinson, A.; Yamamoto, T.; Dodds, H. [Univ. of Tennessee, Knoxville, TN (United States)

    1994-12-31T23:59:59.000Z

    This work examines the physical processes that would cause an accidental criticality involving higly enriched uranium(HEU) powder to shut down naturally. The study analyses an excursion resulting from the continous poring of slightly damp HEU powder (either UO{sub 3} or UF{sub 4} containing 1.5% water) onto a concrete floor.

  18. Characterization of prealloyed copper powders treated in high energy ball mill

    SciTech Connect (OSTI)

    Rajkovic, Viseslava [Institute of Nuclear Sciences 'Vinca', P.O. Box 522, 11001 Belgrade (Serbia and Montenegro)]. E-mail: visnja@vin.bg.ac.yu; Bozic, Dusan [Institute of Nuclear Sciences 'Vinca', P.O. Box 522, 11001 Belgrade (Serbia and Montenegro); Jovanovic, Milan T. [Institute of Nuclear Sciences 'Vinca', P.O. Box 522, 11001 Belgrade (Serbia and Montenegro)

    2006-08-15T23:59:59.000Z

    The inert gas atomised prealloyed copper powders containing 3.5 wt.% Al were milled up to 20 h in the planetary ball mill in order to oxidize aluminium in situ with oxygen from the air. In the next procedure compacts from milled powder were synthesized by hot-pressing in argon atmosphere. Compacts from as-received Cu-3.5 wt.% Al powder and electrolytic copper powder were also prepared under the same conditions. Microstructural and morphological changes of high energy milled powder as well as changes of thermal stability and electrical conductivity of compacts were studied as a function of milling time and high temperature exposure at 800 deg. C. Optical, scanning electron microscopy (SEM) and X-ray diffraction analysis were performed for microstructural characterization, whereas thermal stability and electrical conductivity were evaluated by microhardness measurements and conductometer Sigmatest, respectively. The prealloyed 5 h-milled and compacted powder showed a significant increase in microhardness reaching the value of 2600 MPa, about 4 times greater than that of compacts synthesized from as-received electrolytic copper powder (670 MPa). The electrical conductivity of compacts from 5 h-milled powder was 52% IACS. The results were discussed in terms of the effect of small grain size and finely distributed alumina dispersoids on hardening and thermal stability of compacts.

  19. Preparation of lead-zirconium-titanium film and powder by electrodeposition

    DOE Patents [OSTI]

    Bhattacharya, R.N.; Ginley, D.S.

    1995-10-31T23:59:59.000Z

    A process is disclosed for the preparation of lead-zirconium-titanium (PZT) film and powder compositions. The process comprises the steps of providing an electrodeposition bath, providing soluble salts of lead, zirconium and titanium metals to this bath, electrically energizing the bath to thereby direct ions of each respective metal to a substrate electrode and cause formation of metallic particles as a recoverable film of PZT powder on the electrode, and also recovering the resultant film as a powder. Recovery of the PZT powder can be accomplished by continually energizing the bath to thereby cause powder initially deposited on the substrate-electrode to drop therefrom into the bath from which it is subsequently removed. A second recovery alternative comprises energizing the bath for a period of time sufficient to cause PZT powder deposition on the substrate-electrode only, from which it is subsequently recovered. PZT film and powder so produced can be employed directly in electronic applications, or the film and powder can be subsequently oxidized as by an annealing process to thereby produce lead-zirconium-titanium oxide for use in electronic applications. 4 figs.

  20. Sinterable ceramic powders from laser heated gas phase reactions and rapidly solidified ceramic materials : annual report.

    E-Print Network [OSTI]

    Haggerty, John Scarseth

    1984-01-01T23:59:59.000Z

    CO[subscript 2] lasers have been employed to heat reactant gases to synthesize Si, Si[subscript 3] N[subscript 4] and SiC powders. The powders are small, uniform in size, nonagglomerated, highly pure and of controlled ...

  1. Cold compaction study of Armstrong Process Ti-6Al-4V powders

    SciTech Connect (OSTI)

    Chen, Wei [ORNL; Yamamoto, Yukinori [ORNL; Peter, William H [ORNL; Gorti, Sarma B [ORNL; Sabau, Adrian S [ORNL; Clark, Michael B [ORNL; Nunn, Stephen D [ORNL; Kiggans, Jim [ORNL; Blue, Craig A [ORNL; Fuller, Brian [International Titanium Powder; Akhtar, Kamal [International Titanium Powder

    2011-01-01T23:59:59.000Z

    This work investigates the cold compaction behavior of Ti-6Al-4V powders produced by Armstrong Process . As-received as well as milled powders were characterized and these powders were uniaxially die-pressed at designated pressures up to 690 MPa to form disk samples with different aspect ratios. Samples with high aspect ratio exhibited non-uniform density along the pressing axis and the density distribution is in consistent with the result predicted by finite element analysis. The linear regression analysis on the experimental density data can be used to predict density of compacts with different aspect ratios. In the studied pressure range, an empirical powder compaction equation represents the green density pressure relationship very well for both the as-received and 1-hr milled Armstrong Ti-6Al-4V powders.

  2. Causal Factors of Weld Porosity in Gas Tungsten Arc Welding of Powder Metallurgy Produced Titanium Alloys

    SciTech Connect (OSTI)

    Muth, Thomas R [ORNL; Yamamoto, Yukinori [ORNL; Frederick, David Alan [ORNL; Contescu, Cristian I [ORNL; Chen, Wei [ORNL; Lim, Yong Chae [ORNL; Peter, William H [ORNL; Feng, Zhili [ORNL

    2013-01-01T23:59:59.000Z

    ORNL undertook an investigation using gas tungsten arc (GTA) welding on consolidated powder metallurgy (PM) titanium (Ti) plate, to identify the causal factors behind observed porosity in fusion welding. Tramp element compounds of sodium and magnesium, residual from the metallothermic reduction of titanium chloride used to produce the titanium, were remnant in the starting powder and were identified as gas forming species. PM-titanium made from revert scrap where sodium and magnesium were absent, showed fusion weld porosity, although to a lesser degree. We show that porosity was attributable to hydrogen from adsorbed water on the surface of the powders prior to consolidation. The removal / minimization of both adsorbed water on the surface of titanium powder and the residues from the reduction process prior to consolidation of titanium powders, are critical to achieve equivalent fusion welding success similar to that seen in wrought titanium produced via the Kroll process.

  3. Arene Trifluoromethylation: An Effective Strategy to Obtain Air...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Effective Strategy to Obtain Air-Stable nType Organic Semiconductors with Tunable Optoelectronic Arene Trifluoromethylation: An Effective Strategy to Obtain Air-Stable nType...

  4. Policy Flash 2013-24 Fee Determinations: Requirement to Obtain...

    Office of Environmental Management (EM)

    Policy Flash 2013-24 Fee Determinations: Requirement to Obtain Acquisition Executive's Input Policy Flash 2013-24 Fee Determinations: Requirement to Obtain Acquisition Executive's...

  5. Rapid formation of phase-clean 110 K (Bi-2223) powders derived via freeze-drying process

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL)

    1996-01-01T23:59:59.000Z

    A process for the preparation of amorphous precursor powders for Pb-doped Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x (2223) includes a freeze-drying process incorporating a splat-freezing step. The process generally includes splat freezing a nitrate solution of Bi, Pb, Sr, Ca, and Cu to form flakes of the solution without any phase separation; grinding the frozen flakes to form a powder; freeze-drying the frozen powder; heating the dried powder to form a dry green precursor powders; denitrating the green-powders; heating the denitrated powders to form phase-clean Bi-2223 powders. The grain boundaries of the 2223 grains appear to be clean, leading to good intergrain contact between 2223 grains.

  6. Novel synthesis of high phase-purity Mg2SnO4 from metallic precursors via powder metallurgy route

    E-Print Network [OSTI]

    Azad, Abdul-Majeed

    Novel synthesis of high phase-purity Mg2SnO4 from metallic precursors via powder metallurgy route of composition Mg2Sn was prepared by the conventional powder metallurgy route. This up on heating in air under

  7. Rapid formation of phase-clean 110 K (Bi-2223) powders derived via freeze-drying process

    DOE Patents [OSTI]

    Balachandran, U.

    1996-06-04T23:59:59.000Z

    A process for the preparation of amorphous precursor powders for Pb-doped Bi{sub 2}Sr{sub 2} Ca{sub 2}Cu{sub 3}O{sub x} (2223) includes a freeze-drying process incorporating a splat-freezing step. The process generally includes splat freezing a nitrate solution of Bi, Pb, Sr, Ca, and Cu to form flakes of the solution without any phase separation; grinding the frozen flakes to form a powder; freeze-drying the frozen powder; heating the dried powder to form a dry green precursor powders; denitrating the green-powders; heating the denitrated powders to form phase-clean Bi-2223 powders. The grain boundaries of the 2223 grains appear to be clean, leading to good intergrain contact between 2223 grains. 11 figs.

  8. Application and modeling of near-infrared frequency domain photon migration for monitoring pharmaceutical powder blending operations

    E-Print Network [OSTI]

    Pan, Tianshu

    2006-10-30T23:59:59.000Z

    of blending. A simulation method was developed which consisted of (i) dynamic simulation for generating the powder structure; (ii) the completely-randommixture model for predicting the spatial distribution of API particles within the powder bed; and (iii...

  9. A comparison of groundwater recharge estimation methods in the Williston and Powder River structural basins in the Northern Great Plains

    E-Print Network [OSTI]

    Torgersen, Christian

    A comparison of groundwater recharge estimation methods in the Williston and Powder River-water-balance (SWB) model to estimate groundwater recharge in the Williston and Powder River structural basins

  10. Standard test method for carbon (total) in uranium oxide powders and pellets by direct combustion-infrared detection method

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2009-01-01T23:59:59.000Z

    Standard test method for carbon (total) in uranium oxide powders and pellets by direct combustion-infrared detection method

  11. Low-momentum interactions with Brown-Rho-Ericson scalings, and the density dependence of the nuclear symmetry energy

    SciTech Connect (OSTI)

    Dong Huan; Kuo, T. T. S.; Machleidt, R. [Department of Physics and Astronomy, Stony Brook University, New York 11794-3800 (United States); Department of Physics, University of Idaho, Moscow, Idaho 83844 (United States)

    2011-05-15T23:59:59.000Z

    We have calculated the nuclear symmetry energy E{sub sym}({rho}) up to densities of 4-5{rho}{sub 0} with the effects from the Brown-Rho (BR) and Ericson scalings with the in-medium mesons included. Using the V{sub lowk} low-momentum interaction with and without such scalings, the equations of state (EOSs) of symmetric and asymmetric nuclear matter have been calculated using a ring-diagram formalism where the particle-particle-hole-hole ring diagrams are included to all orders. The EOSs for symmetric nuclear matter and neutron matter obtained with linear BR scaling are both overly stiff compared with the empirical constraints of Danielewicz et al. [Science 298, 1592 (2002)]. In contrast, satisfactory results are obtained by either using the nonlinear Ericson scaling or by adding a Skyrme-type three-nucleon force (TNF) to the unscaled V{sub lowk} interaction. Our results for E{sub sym}({rho}) obtained with the nonlinear Ericson scaling are in good agreement with the empirical values of Tsang et al. [Phys. Rev. Lett. 102, 122701 (2009)] and Li et al. [Phys. Rev. C 72, 064611 (2005)], while those with the TNF are slightly below these values. For densities below the nuclear saturation density {rho}{sub 0}, the results of the above calculations are nearly equivalent to each other and all are in satisfactory agreement with the empirical values.

  12. Low-momentum interactions with Brown-Rho-Ericson scalings and the density dependence of the nuclear symmetry energy

    E-Print Network [OSTI]

    Dong, Huan; Machleidt, R

    2011-01-01T23:59:59.000Z

    We have calculated the nuclear symmetry energy $E_{sym}(\\rho)$ up to densities of $4 \\sim 5 \\rho_0$ with the effects from the Brown-Rho (BR) and Ericson scalings for the in-medium mesons included. Using the $V_{low-k}$ low-momentum interaction with and without such scalings, the equations of state (EOS) of symmetric and asymmetric nuclear matter have been calculated using a ring-diagarm formalism where the particle-particle-hole-hole ring diagrams are included to all orders. The EOS for symmetric nuclear matter and neutron matter obtained with linear BR scaling are both overly stiff compared with the empirical constraints of Danielewicz {\\it et al.} \\cite{daniel02}. In contrast, satisfactory results are obtained by either using the nonlinear Ericson scaling or by adding a Skyrme-type three-nucleon force (TNF) to the unscaled $V_{low-k}$ interaction. Our results for $E_{sym}(\\rho)$ obtained with the nonlinear Ericson scaling are in good agreement with the empirical values of Tsang {\\it et al.} \\cite{tsang09} a...

  13. Low-momentum interactions with Brown-Rho-Ericson scalings and the density dependence of the nuclear symmetry energy

    E-Print Network [OSTI]

    Huan Dong; T. T. S. Kuo; R. Machleidt

    2011-01-10T23:59:59.000Z

    We have calculated the nuclear symmetry energy $E_{sym}(\\rho)$ up to densities of $4 \\sim 5 \\rho_0$ with the effects from the Brown-Rho (BR) and Ericson scalings for the in-medium mesons included. Using the $V_{low-k}$ low-momentum interaction with and without such scalings, the equations of state (EOS) of symmetric and asymmetric nuclear matter have been calculated using a ring-diagarm formalism where the particle-particle-hole-hole ring diagrams are included to all orders. The EOS for symmetric nuclear matter and neutron matter obtained with linear BR scaling are both overly stiff compared with the empirical constraints of Danielewicz {\\it et al.} \\cite{daniel02}. In contrast, satisfactory results are obtained by either using the nonlinear Ericson scaling or by adding a Skyrme-type three-nucleon force (TNF) to the unscaled $V_{low-k}$ interaction. Our results for $E_{sym}(\\rho)$ obtained with the nonlinear Ericson scaling are in good agreement with the empirical values of Tsang {\\it et al.} \\cite{tsang09} and Li {\\it et al.} \\cite{li05}, while those with TNF are slightly below these values. For densities below the nuclear saturation density $\\rho_0$, the results of the above calculations are nearly equivalent to each other and all in satisfactory agreement with the empirical values.

  14. ancient iberian brown: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Websites Summary: Screen Esc Print Version Interactive Discussion EGU Abstract Wind speed data obtained from the National-March) wind in- dices for the western Iberian...

  15. Groundwater recharge estimates for the Powder River and Williston structural basins Katherine R. Aurand and Andrew J. Long

    E-Print Network [OSTI]

    Torgersen, Christian

    Groundwater recharge estimates for the Powder River and Williston structural basins Katherine R Cretaceous aquifer system in the Powder River and Williston structural basins. The study area covers about 75 production in the Powder River structural basin and oil production in the Williston structural basin

  16. Paleotopography and hydrocarbon accumulation: Williston, Powder River, and Denver basins

    SciTech Connect (OSTI)

    Thomas, G.E. (Thomas and Associates, Denver, CO (United States))

    1991-06-01T23:59:59.000Z

    Recent geomorphic analyses of 1:24,000 scale topographic maps in the three major basins of the northern Great Plains have disclosed a persistent system of basement paleotopographic features that trend north-northeast throughout the region. Superimposed across this system and subtly influenced by it, are the northwesterly trending Laramide structural features. Paleozoic depositional patterns have been strongly influenced by the paleoridge and trough system formed by the north-northeast features. Mesozoic deposition has also been affected by the ancient subsurface system but in a more subtle manner. Many of the Paleozoic and Mezoxoic hydrocarbon locations in the three basins appear to be the results of paleotopographic control on hydrocarbon accumulation sites. This affect ranges from Paleozoic reef sites in the Williston basin through paleotrough localization of Pennsylvanian Minnelusa production in the Powder River basin to fractured Cretaceous Niobrara production at the Silo field in the Denver basin. Basement paleotopography is the underlying factor in all deposition and subsequent hydrocarbon migration in any basin. As such, it should be considered a major factor in the exploration for oil and gas.

  17. EXPERIMENTS WITH POWDERED CMN THERMOMETERS BETWEEN 10 mK AND 4K, AND A COMPARISON WITH AN NBS SRM 768 FIXED POINT DEVICE

    E-Print Network [OSTI]

    Fogle, W.E.

    2010-01-01T23:59:59.000Z

    EXPERIMENTS WITH POWDERED CMN THERMOMETERS BETWEEN 10 mK ANDof a powdered CHN thermometer with an NBS fixed point devicesuperficially similar CMN thermometers is also presented. c

  18. HST SPECTRAL MAPPING OF L/T TRANSITION BROWN DWARFS REVEALS CLOUD THICKNESS VARIATIONS

    SciTech Connect (OSTI)

    Apai, Daniel [Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721 (United States); Radigan, Jacqueline; Jayawardhana, Ray [Department of Astronomy, University of Toronto, 50 St. George Street, Toronto M5S 3H4 (Canada); Buenzli, Esther [Department of Astronomy and Steward Observatory, 933 N. Cherry Avenue, University of Arizona, Tucson, AZ 85721 (United States); Burrows, Adam [Department of Astrophysical Sciences, 105 Peyton Hall, Princeton University, Princeton, NJ 08544 (United States); Reid, Iain Neill, E-mail: apai@as.arizona.edu [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21212 (United States)

    2013-05-10T23:59:59.000Z

    Most directly imaged giant exoplanets are fainter than brown dwarfs with similar spectra. To explain their relative underluminosity, unusually cloudy atmospheres have been proposed. However, with multiple parameters varying between any two objects, it remained difficult to observationally test this idea. We present a new method, sensitive time-resolved Hubble Space Telescope near-infrared spectroscopy, to study two rotating L/T transition brown dwarfs (2M2139 and SIMP0136). The observations provide spatially and spectrally resolved mapping of the cloud decks of the brown dwarfs. The data allow the study of cloud structure variations while other parameters are unchanged. We find that both brown dwarfs display variations of identical nature: J- and H-band brightness variations with minimal color and spectral changes. Our light curve models show that even the simplest surface brightness distributions require at least three elliptical spots. We show that for each source the spectral changes can be reproduced with a linear combination of only two different spectra, i.e., the entire surface is covered by two distinct types of regions. Modeling the color changes and spectral variations together reveal patchy cloud covers consisting of a spatially heterogeneous mix of low-brightness, low-temperature thick clouds and brighter, thin, and warm clouds. We show that the same thick cloud patches seen in our varying brown dwarf targets, if extended to the entire photosphere, predict near-infrared colors/magnitudes matching the range occupied by the directly imaged exoplanets that are cooler and less luminous than brown dwarfs with similar spectral types. This supports the models in which thick clouds are responsible for the near-infrared properties of these ''underluminous'' exoplanets.

  19. Effects of TiCl4 Purity on the Sinterability of Armstrong-Processed Ti Powder

    SciTech Connect (OSTI)

    Weil, K. Scott; Hovanski, Yuri; Lavender, Curt A.

    2009-04-03T23:59:59.000Z

    A series of high purity and low purity powders were synthesized from TiCl4 by the Armstrong process. While both powders displayed swelling when consolidated and sintered, the lower purity powder exhibited this phenomenon in significantly lower degree. The improvement is attributed to the increase in the onset of sintering temperature, which mitigates the entrapment of volatile impurities that would otherwise lead to pore formation and growth. The net effect is that the use of a lower purity TiCl4 may beneficial in two ways: (1) it is a potentially lower cost precursor to Ti powder production and (2) the trace impurities allow higher density components to be fabricated via a typical low-cost press and sinter approach.

  20. Hydrocarbon trapping mechanisms in the Miller Creek area of the Powder River Basin, Wyoming

    E-Print Network [OSTI]

    Armstrong, Jennifer Ann

    1975-01-01T23:59:59.000Z

    '' 1975 43'W'79 ABSTRACT Hydrocarbon Trapoing Mechanisms in the Miller Creek Area of the Powder River Basin, Wyoming. (May 1975) Jennifer Ann Armstrong, B. S. , University of Texas at Austin Chairman of Advisory Committee: 17r. Robert. R. Berg...

  1. Combustion of Bulk 84% Fe/16% KCIO{sub 4} heat powder

    SciTech Connect (OSTI)

    Nissen, M.; Guidotti, R.A.; Berry, B.

    1996-05-01T23:59:59.000Z

    Fe/KClO{sub 4} pyrotechnic mixtures are used in thermal batteries to provide the heat necessary to bring the battery stack to operating temperatures of 550 to 600 C. This heat source is normally used as discs pressed from bulk powder. To evaluate the consequences associated with unexpected ignition of large amounts of heat powder, combustion of 84% Fe/16% KClO{sub 4} heat powders was conducted for various scenarios under controlled conditions and the response documented. Increasing amounts of heat powder--up to 8 lbs--were ignited in both unconfined and confined (sealed) containers in a remote area. The containers were thermocoupled and the resulting burning filmed with a standard video camera, high-speed (1,000 frames/s) film and video cameras, and an infrared video camera. A 20- minute video of the burning under the various conditions is presented.

  2. Electricity from wood powder report on a TPV generator in progress

    SciTech Connect (OSTI)

    Broman, L.; Jarefors, K. [Solar Energy Research Center (SERC), University College of Falun Borlange (UCFB), Box 10044, S-781 10 Borlange (Sweden); Marks, J. [Department of Operational Efficiency, Swedish University of Agricultural Sciences (SLU), Herrgardsv 122, S-776 98 Garpenberg (Sweden); Wanlass, M. [National Renewable Energy Laboratory (NREL), 1617 Cole Blvd., Golden, Colorado 80401-3393, United States of America

    1996-02-01T23:59:59.000Z

    A joint project between NREL, SLU, and UCFB aims at building a wood powder fueled TPV generator. The progress of the project is presented. {copyright} {ital 1996 American Institute of Physics.}

  3. E-Print Network 3.0 - aluminum powder alloy Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search Powered by Explorit Topic List Advanced Search Sample search results for: aluminum powder alloy Page: << < 1 2 3 4 5 > >> 1 JOURNALDEPHYSIQUE1V ColloqueC7,supplement au...

  4. E-Print Network 3.0 - aluminum alloy powder Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search Powered by Explorit Topic List Advanced Search Sample search results for: aluminum alloy powder Page: << < 1 2 3 4 5 > >> 1 JOURNALDEPHYSIQUE1V ColloqueC7,supplement au...

  5. E-Print Network 3.0 - aluminum nitride powder Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the original powder. An FTIR study was done using the KBr technique and a high... , a reduction in the content of adsorbed water was observed, compared to the original ... Source:...

  6. E-Print Network 3.0 - al-mo powder processing Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the critical transition temperature and the critical current density of the processed powder by magnetic... h and Jc of the order of 106 A cm-2 at 4 K. The superconducting...

  7. Transient liquid-phase infiltration of a powder-metal skeleton

    E-Print Network [OSTI]

    Lorenz, Adam Michael, 1974-

    2002-01-01T23:59:59.000Z

    Transient Liquid-Phase Infiltration (TLI) is a new method for densifying a powder-metal skeleton that produces a final part of homogeneous composition without significant dimensional change, unlike traditional infiltration ...

  8. alloyed fe-mo powder: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  9. alloyed al-ti powders: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - TxSpace Summary: The research in this thesis covers the design and implementation of a depleted uranium (DU) powder production system and the initial results of a DU-Zr-Mg alloy...

  10. Limits to the potential distribution of light brown apple moth in Arizona–California based on climate suitability and host plant availability

    E-Print Network [OSTI]

    Gutierrez, Andrew Paul; Mills, Nicholas J.; Ponti, Luigi

    2010-01-01T23:59:59.000Z

    503–531 Dumbleton LJ (1932) The apple leaf roller (TortrixJW (1937) The light-brown apple moth (Tortrix post- vittana,distribution of light brown apple moth in Arizona–California

  11. Deterministic Time Classes Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown University. p.1

    E-Print Network [OSTI]

    Beimel, Amos

    Lecture 11 Deterministic Time Classes Slides modified by Benny Chor, based on original slides on Model Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown University. ­ p Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown University. ­ p.1 #12

  12. Reduction Involving Controlled Execution Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown University. p.1

    E-Print Network [OSTI]

    Beimel, Amos

    Lecture 10 Reduction Involving Controlled Execution Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown University. ­ p.1 #12;Lecture 10 Reduction Involving Controlled Execution Rice Theorem Slides modified by Benny Chor, based on original slides by Maurice Herlihy, Brown

  13. 2010 USDA Research Forum on Invasive Species GTR-NRS-P-75 87 ECONOMIC ANALYSIS OF LIGHT BROWN APPLE MOTH

    E-Print Network [OSTI]

    2010 USDA Research Forum on Invasive Species GTR-NRS-P-75 87 ECONOMIC ANALYSIS OF LIGHT BROWN APPLE. Our analyses indicated that LBAM could cause substantial economic losses to U.S. apple, grape, orange an economic analysis of the light brown apple moth (LBAM), (Epiphyas postvittana (Walker)), whose presence

  14. Ionization in atmospheres of Brown Dwarfs and extrasolar planets IV. The Effect of Cosmic Rays

    E-Print Network [OSTI]

    Rimmer, Paul

    2013-01-01T23:59:59.000Z

    Cosmic rays provide an important source for free electrons in the Earth's atmosphere and also in dense interstellar regions where they produce a prevailing background ionization. We utilize a Monte Carlo cosmic ray transport model for particle energies of 1 MeV model for particle energies of 1 GeV model atmospheres of an example brown dwarf with effective temperature Teff = 1500 K, and two example giant gas planets (Teff = 1000 K, 1500 K). For the model brown dwarf atmosphere, the electron fraction is enhanced significantly by cosmic rays when the pressure pgas model atmosphere of the examp...

  15. A model for the management of the Texas brown shrimp fishery

    E-Print Network [OSTI]

    Tydlacka, Glenn Charles

    1979-01-01T23:59:59.000Z

    1979 Major Subject: Agricultural Economics A MODEL FOR THE MANAGEMENT OF THE TEXAS BROWN SHRIMP FISHERY A Thesis by GLENN CHARLES TYDLACKA Approved as to style and content by: (Chairman oE Commi e) pg w~ (Member) (M j) Augvst 1979 ABSTRACT... A Model for the Management of the Texas Brown Shrimp Fishery. (August 1979) Glenn Charles Tydlacka, B. S. , Texas A&M University Chairman of Advi" ory Committee: Dr. Wade L. Griffin The management of the shrimp fi-hery in Texas is an important...

  16. Double Conscious Brother in the Veil Toward an Intellectual Biography of Sterling A. Brown

    E-Print Network [OSTI]

    Tidwell, John E.

    1998-09-01T23:59:59.000Z

    DOUBLE CONSCIOUS BROTHER IN THE VEIL Toward an Intellectual Biography of Sterling A. Brown by John Edgar Tidwell Our home was graced with six children, five girls arid one boy. . . . The youngest of the family is a boy now 22 years of age. He... to that proffered in the High Schools of Washington. —Rev. Dr. Sterling Nelson Brown, My Own Life Story (37) "I kin be a good bishop, I got de looks, An' I ain't spoiled myself By readin' books. "Don't know so much 'Bout de Holy Ghost, But I likes de long...

  17. Two methods for characterizing the compaction and ejection behavior of metal powders in a die

    E-Print Network [OSTI]

    Sajdak, Richard James

    1969-01-01T23:59:59.000Z

    TWO METHODS FOR CHARACTERIZING THE COMPACTION AND EJECTION BEHAVIOR OF METAL POWDERS IN A DIE A Thesis by RICHARD JAMES SAJDAK Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of Committee) (Head of Departme t) &ci- (51embor) (Flember) May 1969 ABSTRACT Two Methods for Characterizing the Compaction and Ejection Behavior of Metal Powders In a Die. (May 1969) Richard James Sajdak, B. S. , University of Wyoming M. S. , Texas A...

  18. Chemical vapor deposited diamond-on-diamond powder composites (LDRD final report)

    SciTech Connect (OSTI)

    Panitz, J.K.; Hsu, W.L.; Tallant, D.R.; McMaster, M.; Fox, C.; Staley, D.

    1995-12-01T23:59:59.000Z

    Densifying non-mined diamond powder precursors with diamond produced by chemical vapor infiltration (CVI) is an attractive approach for forming thick diamond deposits that avoids many potential manufacturability problems associated with predominantly chemical vapor deposition (CVD) processes. The authors developed techniques for forming diamond powder precursors and densified these precursors in a hot filament-assisted reactor and a microwave plasma-assisted reactor. Densification conditions were varied following a fractional factorial statistical design. A number of conclusions can be drawn as a result of this study. High density diamond powder green bodies that contain a mixture of particle sizes solidify more readily than more porous diamond powder green bodies with narrow distributions of particle sizes. No composite was completely densified although all of the deposits were densified to some degree. The hot filament-assisted reactor deposited more material below the exterior surface, in the interior of the powder deposits; in contrast, the microwave-assisted reactor tended to deposit a CVD diamond skin over the top of the powder precursors which inhibited vapor phase diamond growth in the interior of the powder deposits. There were subtle variations in diamond quality as a function of the CVI process parameters. Diamond and glassy carbon tended to form at the exterior surface of the composites directly exposed to either the hot filament or the microwave plasma. However, in the interior, e.g. the powder/substrate interface, diamond plus diamond-like-carbon formed. All of the diamond composites produced were grey and relatively opaque because they contained flawed diamond, diamond-like-carbon and glassy carbon. A large amount of flawed and non-diamond material could be removed by post-CVI oxygen heat treatments. Heat treatments in oxygen changed the color of the composites to white.

  19. Controlling microstructure of nanocrystalline thermoelectrics through powder processing

    E-Print Network [OSTI]

    Humphry-Baker, Samuel A

    2014-01-01T23:59:59.000Z

    Bismuth Telluride and its solid solutions are currently front running thermoelectric materials because of their high figure of merit. When processed via mechanical alloying to obtain nanocrystalline structures, their ...

  20. Combustion characteristics of dry coal-powder-fueled adiabatic diesel engine: Final report

    SciTech Connect (OSTI)

    Kakwani, R.M.; Kamo, R.

    1989-01-01T23:59:59.000Z

    This report describes the progress and findings of a research program aimed at investigating the combustion characteristics of dry coal powder fueled diesel engine. During this program, significant achievements were made in overcoming many problems facing the coal-powder-fueled engine. The Thermal Ignition Combustion System (TICS) concept was used to enhance the combustion of coal powder fuel. The major coal-fueled engine test results and accomplishments are as follows: design, fabrication and engine testing of improved coal feed system for fumigation of coal powder to the intake air; design, fabrication and engine testing of the TICS chamber made from a superalloy material (Hastelloy X); design, fabrication and engine testing of wear resistant chrome oxide ceramic coated piston rings and cylinder liner; lubrication system was improved to separate coal particles from the contaminated lubricating oil; control of the ignition timing of fumigated coal powder by utilizing exhaust gas recirculation (EGR) and variable TICS chamber temperature; coal-fueled engine testing was conducted in two configurations: dual fuel (with diesel pilot) and 100% coal-fueled engine without diesel pilot or heated intake air; cold starting of the 100% coal-powder-fueled engine with a glow plug; and coal-fueled-engine was operated from 800 to 1800 rpm speed and idle to full load engine conditions.

  1. NATIONAL PRESS RELEASE I PARIS I 30 AUGUST 2013 Brown algae contain phlorotannins, aromatic (phenolic) compounds that are unique in the plant

    E-Print Network [OSTI]

    Canet, Léonie

    NATIONAL PRESS RELEASE I PARIS I 30 AUGUST 2013 Brown algae contain phlorotannins, aromatic elucidated the key step in the production of these compounds in Ectocarpus siliculosus, a small brown alga phlorotannins from brown algae for use in industry was a complex process, and the biosynthesis pathways

  2. Inhalation carcinogenicity study with nickel metal powder in Wistar rats

    SciTech Connect (OSTI)

    Oller, Adriana R. [NiPERA, 2605 Meridian Parkway, Suite 200, Durham, NC 27713 (United States)], E-mail: aoller@nipera.org; Kirkpatrick, Daniel T.; Radovsky, Ann [WIL Research Laboratories, LLC, 1407 George Road, Ashland, OH 44805 8946 (United States); Bates, Hudson K. [NiPERA, 2605 Meridian Parkway, Suite 200, Durham, NC 27713 (United States)

    2008-12-01T23:59:59.000Z

    Epidemiological studies of nickel refinery workers have demonstrated an association between increased respiratory cancer risk and exposure to certain nickel compounds (later confirmed in animal studies). However, the lack of an association found in epidemiological analyses for nickel metal remained unconfirmed for lack of robust animal inhalation studies. In the present study, Wistar rats were exposed by whole-body inhalation to 0, 0.1, 0.4, and 1.0 mg Ni/m{sup 3} nickel metal powder (MMAD = 1.8 {mu}m, GSD = 2.4 {mu}m) for 6 h/day, 5 days/week for up to 24 months. A subsequent six-month period without exposures preceded the final euthanasia. High mortality among rats exposed to 1.0 mg Ni/m{sup 3} nickel metal resulted in the earlier termination of exposures in this group. The exposure level of 0.4 mg Ni/m{sup 3} was established as the MTD for the study. Lung alterations associated with nickel metal exposure included alveolar proteinosis, alveolar histiocytosis, chronic inflammation, and bronchiolar-alveolar hyperplasia. No increased incidence of neoplasm of the respiratory tract was observed. Adrenal gland pheochromocytomas (benign and malignant) in males and combined cortical adenomas/carcinomas in females were induced in a dose-dependent manner by the nickel metal exposure. The incidence of pheochromocytomas was statistically increased in the 0.4 mg Ni/m{sup 3} male group. Pheochromocytomas appear to be secondary to the lung toxicity associated with the exposure rather than being related to a direct nickel effect on the adrenal glands. The incidence of cortical tumors among 0.4 mg Ni/m{sup 3} females, although statistically higher compared to the concurrent controls, falls within the historical control range; therefore, in the present study, this tumor is of uncertain relationship to nickel metal exposure. The lack of respiratory tumors in the present animal study is consistent with the findings of the epidemiological studies.

  3. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    on the results of the Renewable Energy Program's activities and status of funding. The 2011 Annual Report and funding awards. The Appendix contains detailed project descriptions, statistics, and financial dataSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  4. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    annually on the results of the Renewable Energy Program's activities and status of funding. The 2011 Annual and funding awards. The Appendix contains detailed project descriptions, statistics, and financial dataSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  5. Short communication Control of brown rot of stone fruits by brief heated water immersion treatments

    E-Print Network [OSTI]

    Crisosto, Carlos H.

    Short communication Control of brown rot of stone fruits by brief heated water immersion treatments. Several studies have shown that hot water treatments by themselves or in combination with other treatments they require are an issue that has hindered the commercial adoption of hot water treatments. While higher water

  6. DYNAMIC TRACKING PHASED ARRAY DATA LINKS K. D. Brown Dr. Chris Allen

    E-Print Network [OSTI]

    Kansas, University of

    DYNAMIC TRACKING PHASED ARRAY DATA LINKS K. D. Brown Dr. Chris Allen NNSA-KCP University of Kansas link developed by National Nuclear Safety Administration's Kansas City Plant (NNSA-KCP) and the University of Kansas (KU) in support of NNSA's Remote Sensing Laboratory (NNSA-RSL) located at the Nevada

  7. Nutrition and Cancer Brown Kelp Modulates Endocrine Hormones in Female Sprague-Dawley

    E-Print Network [OSTI]

    California at Berkeley, University of

    Nutrition and Cancer Brown Kelp Modulates Endocrine Hormones in Female Sprague-Dawley Rats Asians. However, studies from our laboratory suggest that the anti-estrogenic effects of dietary kelp modulation related to kelp ingestion in a pilot study of premenopausal women, we investigated the endocrine

  8. Policy Based Storage System For Heterogeneous Environment Dai Qin, Ashvin Goel, Angela Demke Brown,

    E-Print Network [OSTI]

    Goel, Ashvin

    Policy Based Storage System For Heterogeneous Environment Dai Qin, Ashvin Goel, Angela Demke Brown storage sys- tems to the needs of specific applications and hardware. Most storage systems are not aware of this issue: file systems or other applications talk to the storage system using a simple block layer

  9. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    of the California Solar Initiative, a comprehensive statewide solar program. The NSHP provides rebates to encourage of the NSHP is to install 400 MW of solar electric capacity on new homes and residential buildings by the endSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  10. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    Award Score Score Status 1 CaliSolar, Inc. Manufacturing Capacity Expansion from 60 MW to 155 MW $5 SV Green Tech Corp. Expansion of Solar Panel Manufacturing in California $4,948,000 $0 61 Finalist 12STATE OF CALIFORNIA ­ NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  11. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    STATE OF CALIFORNIA ­ NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY a containment structure that would be located between the solar fields of SEGS VIII and SEGS IX, for the storage STAFF REVIEW AND DETERMINATION Pursuant to section 1769(a)(2), Title 20, California Code of Regulations

  12. Dipole trapped spheromak in a prolate flux conserver M. R. Brown,a

    E-Print Network [OSTI]

    Brown, Michael R.

    Dipole trapped spheromak in a prolate flux conserver M. R. Brown,a C. D. Cothran, J. Fung, M. Chang reports the observation and characterization of a spheromak formed in the Swarthmore Spheromak Experiment. The spheromak is studied in a prolate tilt unstable 0.4 m diameter, 0.6 m length copper flux conserver in SSX

  13. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    -2013-007 The Distributed Generation Integration Cost Study: Analytical Framework is available free from the Energy level of confidence. This study uses the framework to highlight potential impacts, least-cost solutionsSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  14. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    (RNS), and is based on the amount of current electric generation from renewable resources) that is generated from renewable generation resources instead of the capacity (megawatt ­ MW) of these facilitiesSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  15. A Review of "Sir Thomas Browne: The World Proposed" edited by Reid Barbour and Claire Preston

    E-Print Network [OSTI]

    Black, Joseph

    2011-01-01T23:59:59.000Z

    passage into what is surely one of the most important topics for readers of Milton. Reid Barbour and Claire Preston, eds. Sir Thomas Browne: The World Proposed. Oxford: Oxford University Press, 2008. xii + 368 pp. + 3 illus. $120.00. Review by joseph...

  16. Energy Efficient Digital Networks Bruce Nordman, Steven Lanzisera and Richard Brown

    E-Print Network [OSTI]

    LBNL-6254E Energy Efficient Digital Networks Bruce Nordman, Steven Lanzisera and Richard Brown, product, or process disclosed, or represents that its use would not infringe on privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark

  17. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    examines a range of issues facing the state's electricity, natural gas, and transportation fuel sectorsSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY reliability, enhance the #12;2 state's economy, and protect public health and safety." (Public Resources Code

  18. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    of major energy trends and issues facing California's electricity, natural gas, and transportation fuelSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY reliable, secure, and diverse energy supplies; enhance California's economy; and protect public health

  19. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G BROWN, JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    STATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G BROWN, JR., Governor CALIFORNIA ENERGY and Reinvestment Act of 2009 (ARRA) funding to California's transition to a clean energy economy. ARRA dedicated, and greenhouse gas emission reductions as well as the contribution to California's energy and environmental

  20. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    , natural gas, and transportation fuels to meet the needs of the state's economy and growing population proceeding on a range of issues facing California's electricity, natural gas, and transportation fuel sectorsSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  1. From Nash and Brown to Maynard Smith: Equilibria, Dynamics and ESS* J. HOFBAUER

    E-Print Network [OSTI]

    Hofbauer, Josef

    From Nash and Brown to Maynard Smith: Equilibria, Dynamics and ESS* J. HOFBAUER Institut für that in more sophisticated models, an equilibrium satisfying the ESS conditions often re- mains stable in some sense. For example, in the stan- dard dynamic model for haploids, the replicator dy- namics, an ESS

  2. From Nash and Brown to Maynard Smith: Equilibria, Dynamics, and ESS

    E-Print Network [OSTI]

    Hofbauer, Josef

    From Nash and Brown to Maynard Smith: Equilibria, Dynamics, and ESS Josef Hofbauer Institut f sophisticated models, an equilibrium satisfying the ESS conditions often remains stable in some sense. For example, in the standard dynamic model for haploids, the replicator dynamics, an ESS is asymptotically

  3. STATE OF CALIFORNIA -NATURAL RESOURCES AGENCY EDMUND G. BROWN JR.. Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    in June 2012. · Two reports on trends in natural gas markets that were published in 2012. · An assessment: · Forecasts of electricity and natural gas demand for 2012-2022 that were adopted by the Energy CommissionSTATE OF CALIFORNIA - NATURAL RESOURCES AGENCY EDMUND G. BROWN JR.. Governor CALIFORNIA ENERGY

  4. Hot Dry Rock Geothermal Energy Development in the USA David Duchane and Donald Brown

    E-Print Network [OSTI]

    1 Hot Dry Rock Geothermal Energy Development in the USA by David Duchane and Donald Brown Los of the world's store of geothermal energy. The real potential for growth in the use of geothermal energy lies system. Water is circulated around a closed loop to extract thermal energy from an engineered geothermal

  5. EARLY DEVELOPMENTAL STAGES OF THE BROWN SHRIMP, Penaeus aztecus IVES, REARED IN THE LABORATORY 1

    E-Print Network [OSTI]

    . :Manuscript received September 1970. FISHERY BULLETIN: VOL. 69, NO. I, 1971. cies, accurate identification and white shrimps. METHODS AND MATERIALS Larvae of the brown shrimp were first suc- cessfully cultured on these figures are intended to in- dicate only relative size and position, not to show details of setation

  6. Friction in Mid-latitude Bob Plant, Stephen Belcher, Bob Beare, Andy Brown

    E-Print Network [OSTI]

    Plant, Robert

    Friction in Mid-latitude Cyclones Ian Boutle Bob Plant, Stephen Belcher, Bob Beare, Andy Brown #12;Motivation · Many studies have shown the significance of friction in formation and dissipation of cyclones Dt = + � . F . Diabatic Term: · Surface heat fluxes · Latent heat fluxes Frictional Term

  7. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    STATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY that must be replaced to satisfy local capacity area requirements. · A status report on the several studies, protect the environment, ensure energy reliability, enhance the state's economy, and protect public health

  8. Electrical and Computer Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    160 Electrical and Computer Engineering The George R. Brown School of Engineering CHAIR Behnaam Offered: BA, BSEE, MEE, MS, PhD The electrical and computer engineering department strives to provide high for roles of leadership in their chosen careers. In support of this goal, the electrical and computer

  9. SPECTRA OF TUKEY TYPES OF ULTRAFILTERS ON BOOLEAN JENNIFER A. BROWN AND NATASHA DOBRINEN

    E-Print Network [OSTI]

    Dobrinen, Natasha

    SPECTRA OF TUKEY TYPES OF ULTRAFILTERS ON BOOLEAN ALGEBRAS JENNIFER A. BROWN AND NATASHA DOBRINEN Abstract. Extending recent investigations on the structure of Tukey types of ultrafilters on P() to Boolean algebras in general, we classify the spectra of Tukey types of ultrafilters for several classes of Boolean

  10. Spectra of Tukey types of ultrafilters on Boolean algebras Jennifer A. Brown and Natasha Dobrinen

    E-Print Network [OSTI]

    Dobrinen, Natasha

    Spectra of Tukey types of ultrafilters on Boolean algebras Jennifer A. Brown and Natasha Dobrinen Abstract. Extending recent investigations on the structure of Tukey types of ul- trafilters on P() to Boolean algebras in general, we classify the spectra of Tukey types of ultrafilters for several classes

  11. SPECTRA OF TUKEY TYPES OF ULTRAFILTERS ON BOOLEAN JENNIFER BROWN AND NATASHA DOBRINEN

    E-Print Network [OSTI]

    Dobrinen, Natasha

    SPECTRA OF TUKEY TYPES OF ULTRAFILTERS ON BOOLEAN ALGEBRAS JENNIFER BROWN AND NATASHA DOBRINEN Abstract. Extending recent investigations on the structure of Tukey types of ultrafilters on P() to Boolean algebras in general, we classify the spectra of Tukey types of ultrafilters for several classes of Boolean

  12. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    , a reasonable assumption must be made about how much energy is lost due to electrical resistanceSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov Notice

  13. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor NOTICE OF RECEIPT

    E-Print Network [OSTI]

    STATE OF CALIFORNIA ­ NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor NOTICE OF RECEIPT PETITION TO AMEND the CALIFORNIA ENERGY COMMISSION DECISION for the SACRAMENTO POWER AUTHORITY CAMPBELL with the California Energy Commission requesting to amend Condition of Certification EFF-1 for the Campbell

  14. HIST 462: The French Revolution and Napoleonic Era Gregory Brown; gbrown@unlv.nevada.edu; 8954181

    E-Print Network [OSTI]

    Ahmad, Sajjad

    and Society a. Popkin 8 14 /Doyle 66 85 b. Campbell 239 ­ 265 c. Tackett 19 ­ 47 d. Dubois, 30 72. Campbell, 139 ­ 218 c. Tackett, 48 ­ 76 d. Dubois, 73 84 5. Sept 20, 22 Coming of the FrenchHIST 462: The French Revolution and Napoleonic Era Gregory Brown; gbrown@unlv.nevada.edu; 8954181

  15. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    Foresight Renewable Solutions Integrated Solar PV, Advanced Compressed Air Energy Storage, and MicrogridSTATE OF CALIFORNIA ­NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION 1516 NINTH STREET SACRAMENTO, CA 95814-5512 www.energy.ca.gov NOTICE OF PROPOSED AWARDS Community

  16. Letter from Shirley Maiewski to Diana Brown re: Alternative Universe Four

    E-Print Network [OSTI]

    Maiewski, Shirley

    1977-01-01T23:59:59.000Z

    niv/e 481 Main Street Hatfield, MA 01038 April 22, 1977 Diana G. Brown PO Box 187 Henderson, NV 89015 Dear Diana: Thank you for taking the time to write us about AU4. We are delighted that you have enjoyed our efforts. We had such fun...

  17. EIS-0435: Modification of the Groton Generation Station Interconnection Agreement, Brown County, South Dakota

    Broader source: Energy.gov [DOE]

    This EIS evaluates the environmental impacts of a proposal for DOE's Western Area Power Administration to modify its Large Generator Connection Agreement for the Groton Generation Station in Brown County, South Dakota. The modification would allow Basin Electric Power Cooperative, which operates the generation station, to produce power above the current operating limit of 50 average megawatts.

  18. Nematode faunal analysis in an aquic brown soil fertilised with slow-release urea, Northeast China

    E-Print Network [OSTI]

    Neher, Deborah A.

    Nematode faunal analysis in an aquic brown soil fertilised with slow-release urea, Northeast China, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China b Department of Earth of the Chinese Academy of Sciences, Beijing 100039, PR China Received 14 May 2004; received in revised form 15

  19. STATE OF CALIFORNIA NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    /or under- utilized technologies to increase natural gas end-use efficiency in California's industrial* Benz Air Engineering, Co., Inc. High Efficiency Natural Gas Reciprocating Engine Boiler $2STATE OF CALIFORNIA ­ NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  20. Browne, CB, Research Proposal, March 2009 Activation of the Inflammasome in Gout

    E-Print Network [OSTI]

    Gleeson, Joseph G.

    Browne, CB, Research Proposal, March 2009 1 Activation of the Inflammasome in Gout Background Gout. The overall prevalence of gout in the U.S. was determined to be 41 in 1000 (1). Men are at a higher risk than women for gout, and the risk increases with age for both males and females (1). The initiation

  1. Reassessing U.S. nuclear weapons policy Harold Brown[1] and John Deutch[2

    E-Print Network [OSTI]

    Deutch, John

    is the belief that the possession of nuclear weapons will improve its security. Nothing that the United States1 Reassessing U.S. nuclear weapons policy Harold Brown[1] and John Deutch[2] The end of the Cold War changed "the balance of nuclear terror" and with it the centrality of nuclear forces in U

  2. METHANE AND ETHANE ON THE BRIGHT KUIPER BELT OBJECT 2005 FY9 M. E. Brown,1

    E-Print Network [OSTI]

    Brown, Michael E.

    METHANE AND ETHANE ON THE BRIGHT KUIPER BELT OBJECT 2005 FY9 M. E. Brown,1 K. M. Barkume,1 G. A regime and by absorption due to methane in the near-infrared. The solid methane absorption lines through the methane. These long path lengths can be parameterized as a methane grain size of approximately

  3. Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian

    E-Print Network [OSTI]

    Wehrli, Bernhard

    Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian, University of Hamburg, Allende-Platz 2, 20146 Hamburg, Germany Summary 1. Methane (CH4) oxidation to Sphagnum species and low-pH peatlands. 2. Moss-associated methane oxidation (MAMO) can be an effective

  4. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    /strikeout. Background The NSHP is part of a comprehensive statewide solar program known as the California Solar scheduled Energy Commission Business Meeting. The minimum guidelines for implementing California's solarSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  5. STATE OF CALIFORNIA THE RESOURCES AGENCY EDMUND G. BROWN, JR. , Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    having been shown, the California Energy Commission hereby grants the request by AES Solar to terminateSTATE OF CALIFORNIA THE RESOURCES AGENCY EDMUND G. BROWN, JR. , Governor CALIFORNIA ENERGY COMMISSION 1516 NINTH STREET SACRAMENTO, CA 95814-5112 STATE OF CALIFORNIA ENERGY RESOURCES CONSERVATION

  6. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN Jr., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    STATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN Jr., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov Presentation on the U.S. Department of Defense Study: Solar Energy Development on Department of Defense Installations

  7. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    to Proposed Revisions to the New Solar Homes Partnership Guidebook The California Energy Commission will hold1 STATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov In the matter

  8. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    known as the California Solar Initiative. The NSHP provides financial incentives to encourageSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov In the matter

  9. The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    211Introduction to Engineering Computation · STAT310Probability and Statistics · STAT410Introduction263 Statistics The George R. Brown School of Engineering Degrees Offered: BA, MStat, MA, PhD Course engineering, computational and applied mathematics, managerial studies, mathematics, political science

  10. PHENOLOGY AND BROWN-HEADED COWBIRD PARASITISM B.A., University of Colorado, 2003

    E-Print Network [OSTI]

    Hammerton, James

    PHENOLOGY AND BROWN-HEADED COWBIRD PARASITISM by TY TUFF B.A., University of Colorado, 2003 A thesis submitted to the Faculty of the Graduate School of the University of Colorado in partial, to evaluate the impact of parasitism on two local hosts in the Colorado Front Range: the primary host

  11. A Navigation System for Robot Soccer Brett Browning, Gordon Wyeth and Ashley Tews

    E-Print Network [OSTI]

    Browning, Brett

    A Navigation System for Robot Soccer Brett Browning, Gordon Wyeth and Ashley Tews Computer Science describes the navigation system used for the UQ RoboRoos robot soccer team, runner up in the 1998 world RoboCup championships. The navigation system has been developed to cope with the dynamic environment of robot soccer

  12. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    : SERVICE ON THE CHIEF COUNSEL INSTRUCTIONS: Service of complaints/documents on the Chief Counsel EnergySTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov Form CEC-108

  13. STATE OF CALIFORNIA --NATURAL RESOURCES AGENCY EDMUND G. BROWN Jr., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    Startups, and more clean energy jobs. The Forum will: 1) Showcase companies that have developed new cuttingSTATE OF CALIFORNIA -- NATURAL RESOURCES AGENCY EDMUND G. BROWN Jr., Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street Sacramento, California 95814 Main website: www.energy.ca.gov Venture Capital

  14. STATE OF CALIFORNIA -NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY COMMISSION

    E-Print Network [OSTI]

    the CALIFORNIA ENERGY COMMISSION DECISION for the SEGS VIII SOLAR FACILITY (88-AFC-1C) On June 11, 2013, Next, and standards (Title 20, California Code of Regulations, section 1769). Energy Commission staff is currentlySTATE OF CALIFORNIA - NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor CALIFORNIA ENERGY

  15. Light brown apple moth Epiphyas postvittana Michigan State University's invasive species factsheets

    E-Print Network [OSTI]

    shelters. Older larvae may create nests by folding or webbing leaves, buds and fruits together where-11 mm long; pale to dark brown; can be found in leaves that are spun together. Eggs : About 1 mm (folded leaves or leaves, buds and fruits webbed together). Superficial fruit damage; point-like holes

  16. Civil and Environmental Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    infrastructure and management (transportation systems, urban systems, soil mechanics, engineering economics129 Civil and Environmental Engineering The George R. Brown School of Engineering Chair Pedro. Wiesner adjunCt assistant Professor Karen Duston Professor in the PraCtiCe in Civil engineering management

  17. Civil and Environmental Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    infrastructure and management (transportation systems, urban systems, soil mechanics, engineering economics engineering management Joseph Cibor Ed Segner, III Professor in the PraCtiCe of environmental law James B137 Civil and Environmental Engineering The George R. Brown School of Engineering Chair Pedro

  18. Civil and Environmental Engineering The George R. Brown School of Engineering

    E-Print Network [OSTI]

    Richards-Kortum, Rebecca

    : · structural engineering · environmental engineering · engineering management Associate Professors Panos and Watershed Analysis CIVI 451 Introduction to Transportation CIVI 470 Basic Soil Mechanics CIVI 480 Senior119 Civil and Environmental Engineering The George R. Brown School of Engineering Chair Joseph B

  19. Lab obtains approval to begin design on new radioactive waste...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New radioactive waste staging facility Lab obtains approval to begin design on new radioactive waste staging facility The 4-acre complex will include multiple staging buildings...

  20. Idaho Site Obtains Patent for Nuclear Reactor Sodium Cleanup...

    Office of Environmental Management (EM)

    Idaho Site Obtains Patent for Nuclear Reactor Sodium Cleanup Treatment March 28, 2013 - 12:00pm Addthis CWI engineers Jeff Jones, David Tolman, right, and Kirk Dooley...

  1. Thermal evolution behavior of carbides and {gamma} Prime precipitates in FGH96 superalloy powder

    SciTech Connect (OSTI)

    Zhang Lin, E-mail: zhanglincsu@163.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Liu Hengsan, E-mail: lhsj63@sohu.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); He Xinbo, E-mail: xb_he@163.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Rafi-ud-din, E-mail: rafiuddi@gmail.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Qu Xuanhui, E-mail: quxh@ustb.edu.cn [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Qin Mingli, E-mail: mlqin75@hotmail.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Li Zhou, E-mail: zhouli621@126.com [National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing, 100095 (China); Zhang Guoqing, E-mail: g.zhang@126.com [National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing, 100095 (China)

    2012-05-15T23:59:59.000Z

    The characteristics of rapidly solidified FGH96 superalloy powder and the thermal evolution behavior of carbides and {gamma} Prime precipitates within powder particles were investigated. It was observed that the reduction of powder size and the increase of cooling rate had transformed the solidification morphologies of atomized powder from dendrite in major to cellular structure. The secondary dendritic spacing was measured to be 1.02-2.55 {mu}m and the corresponding cooling rates were estimated to be in the range of 1.4 Multiplication-Sign 10{sup 4}-4.7 Multiplication-Sign 10{sup 5} K{center_dot}s{sup -1}. An increase in the annealing temperature had rendered the phase transformation of carbides evolving from non-equilibrium MC Prime carbides to intermediate transition stage of M{sub 23}C{sub 6} carbides, and finally to thermodynamically stable MC carbides. The superfine {gamma} Prime precipitates were formed at the dendritic boundaries of rapidly solidified superalloy powder. The coalescence, growth, and homogenization of {gamma}' precipitates occurred with increasing annealing temperature. With decreasing cooling rate from 650 Degree-Sign C{center_dot}K{sup -1} to 5 Degree-Sign C{center_dot}K{sup -1}, the morphological development of {gamma} Prime precipitates had been shown to proceed from spheroidal to cuboidal and finally to solid state dendrites. Meanwhile, a shift had been observed from dendritic morphology to recrystallized structure between 900 Degree-Sign C and 1050 Degree-Sign C. Moreover, accelerated evolution of carbides and {gamma}' precipitates had been facilitated by the formation of new grain boundaries which provide fast diffusion path for atomic elements. - Highlights: Black-Right-Pointing-Pointer Microstructural characteristic of FGH96 superalloy powder was investigated. Black-Right-Pointing-Pointer The relation between microstructure, particle size, and cooling rate was studied. Black-Right-Pointing-Pointer Thermal evolution behavior of {gamma} Prime and carbides in loose FGH96 powder was studied.

  2. Analysis of powder compaction process through equal channel angular extrusion

    E-Print Network [OSTI]

    Kaushik, Anshul

    2009-05-15T23:59:59.000Z

    extrusion, where the die size increased at each bend before finally 12 going to the original inlet size, were all higher than those obtained using a constant channel extrusion. Semiatin and DeLo (2000) used a sliding bottom die in their simulations...

  3. Formation of mixed oxide powders in flames: Part I. TiO sub 2 --SiO sub 2

    SciTech Connect (OSTI)

    Hung, C.; Katz, J.L. (Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218 (United States))

    1992-07-01T23:59:59.000Z

    Mixed oxide powders, e.g., Al{sub 2}O{sub 3}--TiO{sub 2}, SiO{sub 2}--GeO{sub 2}, and TiO{sub 2}--SiO{sub 2}, are used in industry to produce ceramics, optical fibers, catalysts, and paint opacifiers. The properties of these products depend upon the morphology of the powders. Ceramics and optical fibers are produced using either a uniform mixture of multicomponent particles or a uniform solution. The desired morphology for catalysts is a high surface area and many active sites. TiO{sub 2} coated with a layer of SiO{sub 2} is the desired structure for use as a paint opacifier. In this paper, TiO{sub 2}--SiO{sub 2} mixed oxide powders were synthesized using a counterflow diffusion flame burner. TiCl{sub 4} and SiCl{sub 4} were used as source materials for the formation of oxide particles in hydrogen-oxygen flames. In-situ particle sizes were determined using dynamic light scattering. A thermophoretic sampling method also was used to collect particles directly onto carbon coated grids, and their size, morphology, and crystalline form examined using a transmission electron microscope. A photomultiplier at 90{degree} to the argon ion laser beam was used to measure the light-scattering intensity. The effect of temperature and of Si to Ti concentration ratio on particle morphology was investigated. Strong temperature dependence was observed. At high temperatures, TiO{sub 2} particles were covered with discrete SiO{sub 2} particles. At low temperatures, the structure changes to TiO{sub 2} particles encapsulated by SiO{sub 2}. TEM diffraction pattern measurements showed that the TiO{sub 2} is rutile and the SiO{sub 2} is amorphous silica. At high Si to Ti ratios, SiO{sub 2}-encapsulated TiO{sub 2} particles form. At low Si to Ti ratios, one obtains TiO{sub 2} particles covered with discrete SiO{sub 2} particles.

  4. Characterization and thermal behavior of PrMO{sub 3} (M = Co or Ni) ceramic materials obtained from gelatin

    SciTech Connect (OSTI)

    Aquino, F.M., E-mail: flavyma@hotmail.com [Federal University of Rio Grande of Norte, Laboratory of Catalysis and Refining – NUPRAR, Av. Senador Salgado Filho, 3000, CEP 59078-970, Natal-RN (Brazil); Melo, D.M.A. [Federal University of Rio Grande of Norte, Laboratory of Catalysis and Refining – NUPRAR, Av. Senador Salgado Filho, 3000, CEP 59078-970, Natal-RN (Brazil)] [Federal University of Rio Grande of Norte, Laboratory of Catalysis and Refining – NUPRAR, Av. Senador Salgado Filho, 3000, CEP 59078-970, Natal-RN (Brazil); Pimentel, P.M. [Universidade Federal Rural do Semi-Árido, Campus Angicos, CEP 59515-000, Angicos-RN (Brazil)] [Universidade Federal Rural do Semi-Árido, Campus Angicos, CEP 59515-000, Angicos-RN (Brazil); Braga, R.M.; Melo, M.A.F.; Martinelli, A.E.; Costa, A.F. [Federal University of Rio Grande of Norte, Laboratory of Catalysis and Refining – NUPRAR, Av. Senador Salgado Filho, 3000, CEP 59078-970, Natal-RN (Brazil)] [Federal University of Rio Grande of Norte, Laboratory of Catalysis and Refining – NUPRAR, Av. Senador Salgado Filho, 3000, CEP 59078-970, Natal-RN (Brazil)

    2012-09-15T23:59:59.000Z

    Graphical abstract: The micrograph in figure shows sample calcined at temperature 900 °C. The sample exhibits morphology with considerable porosity and the formation of agglomerated nanometric particles. Gelatin provides the system with a large amount of organic matter, which is then removed during calcinations, favoring the appearance of pores in the material. Highlights: ? Oxides with PrNiO{sub 3} and PrCoO{sub 3} were prepared by new method synthesis. ? The gelatin, through its carboxylate groups and amine, is an efficient director. ? The obtained materials have magnetic properties and application in catalysis. ? The decomposition kinetic study of bonding groups of gelatin with metallic ions that takes part in the synthesis of PrMO{sub 3}. -- Abstract: Metal oxides with perovskite-type structure have attracted considerable interest in recent years due to their magnetic and electrical properties, as well as their catalytic activity. In this study, oxides with PrNiO{sub 3} and PrCoO{sub 3} composition were prepared by using gelatin powder as a precursor agent for its use as a catalyst. The powders obtained were calcined at 700 °C and 900 °C and characterized using the X-ray diffraction, thermal analysis (thermogravimetry and differential thermal analysis), infrared spectroscopy, temperature programed reduction and scanning electron microscopy techniques. Thermogravimetric data using the non-isothermal kinetic models of Flynn and Wall and “Model-free Kinetics” were used to determine the activation energy to study the decomposition kinetics of the ligand groups with system's metallic ions that takes part in the synthesis of PrMO{sub 3} (M = Ni or Co).

  5. Enery Efficient Press and Sinter of Titanium Powder for Low-Cost Components in Vehicle Applications

    SciTech Connect (OSTI)

    Thomas Zwitter; Phillip Nash; Xiaoyan Xu; Chadwick Johnson

    2011-03-31T23:59:59.000Z

    This is the final technical report for the Department of Energy NETL project NT01931 Energy Efficient Press and Sinter of Titanium Powder for Low-Cost Components in Vehicle Applications. Titanium has been identified as one of the key materials with the required strength that can reduce the weight of automotive components and thereby reduce fuel consumption. Working with newly developed sources of titanium powder, Webster-Hoff will develop the processing technology to manufacture low cost vehicle components using the single press/single sinter techniques developed for iron based powder metallurgy today. Working with an automotive or truck manufacturer, Webster-Hoff will demonstrate the feasibility of manufacturing a press and sinter titanium component for a vehicle application. The project objective is two-fold, to develop the technology for manufacturing press and sinter titanium components, and to demonstrate the feasibility of producing a titanium component for a vehicle application. The lowest cost method for converting metal powder into a net shape part is the Powder Metallurgy Press and Sinter Process. The method involves compaction of the metal powder in a tool (usually a die and punches, upper and lower) at a high pressure (up to 60 TSI or 827 MPa) to form a green compact with the net shape of the final component. The powder in the green compact is held together by the compression bonds between the powder particles. The sinter process then converts the green compact to a metallurgically bonded net shape part through the process of solid state diffusion. The goal of this project is to expand the understanding and application of press and sinter technology to Titanium Powder applications, developing techniques to manufacture net shape Titanium components via the press and sinter process. In addition, working with a vehicle manufacturer, demonstrate the feasibility of producing a titanium component for a vehicle. This is not a research program, but rather a project to develop a process for press and sinter of net shape Titanium components. All of these project objectives have been successfully completed.

  6. Aerosols Generated by Free Fall Spills of Powders and Solutions in Static Air

    SciTech Connect (OSTI)

    Sutter, S. L.; Johnston, J. W.; Mishima, J.

    1981-12-01T23:59:59.000Z

    Safety assessments and environmental impact statements for nuclear fuel cycle facilities require an estimation of potential airborne releases. Aerosols generated by accidents are being investigated to develop the source terms for these releases. The lower boundary accidental release event would be a free fall spill of powders or liquids in static air. Experiments measured the mass airborne and particle size distribution of these aerosols for various source sizes and spill heights. Two powder and liquid sources were used: Ti02 and uo2; and aqueous uranine (sodium fluorescein) and uranyl nitrate solutions. Spill height and source size were significant in releases of both powders and liquids. For the source powders used (l "m uo2 and 1.7 "m Ti0 2, quantities from 25 g to 1000 g, and fall heights of 1 m and 3m), the maximum source airborne was 0.12%. The maximum source airborne was an order of magnitude less for the liquids (with source quantities ranging from 125 to 1000 cc at the same fall heights). The median aerodynamic equivalent diameters for collected airborne powder ranged from 6 to 26.5 "m; liquids ranged from 4.1 to 34 "m. All of the spills produced a significant fraction of respirable particles 10 ~m and less.

  7. Self-powdering and nonlinear optical domain structures in ferroelastic beta'-Gd{sub 2}(MoO{sub 4}){sub 3} crystals formed in glass

    SciTech Connect (OSTI)

    Tsukada, Y.; Honma, T. [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan); Komatsu, T., E-mail: komatsu@mst.nagaokaut.ac.j [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)

    2009-08-15T23:59:59.000Z

    Ferroelastic beta'-Gd{sub 2}(MoO{sub 4}){sub 3}, (GMO), crystals are formed through the crystallization of 21.25Gd{sub 2}O{sub 3}-63.75MoO{sub 3}-15B{sub 2}O{sub 3} glass (mol%), and two scientific curious phenomena are observed. (1) GMO crystals formed in the crystallization break into small pieces with a triangular prism or pyramid shape having a length of 50-500 {mu}m spontaneously during the crystallizations in the inside of an electric furnace, not during the cooling in air after the crystallization. This phenomenon is called 'self-powdering phenomenon during crystallization' in this paper. (2) Each self-powdered GMO crystal grain shows a periodic domain structure with different refractive indices, and a spatially periodic second harmonic generation (SHG) depending on the domain structure is observed. It is proposed from polarized micro-Raman scattering spectra and the azimuthal dependence of second harmonic intensities that GMO crystals are oriented in each crystal grain and the orientation of (MoO{sub 4}){sup 2-} tetrahedra in GMO crystals changes periodically due to spontaneous strains in ferroelastic GMO crystals. - Graphical abstract: This figure shows the polarized optical photograph at room temperature for a particle (piece) obtained by a heat treatment of the glass at 590 deg. C for 2 h in an electric furnace in air. This particle was obtained through the self-powdering behavior in the crystallization of glass. The periodic domain structure is observed. Ferroelastic beta'-Gd{sub 2}(MoO{sub 4}){sub 3} crystals are formed in the particle, and second harmonic generations are detected, depending on the domain structure.

  8. OPTIMIZATION OF CUTTING CONDITIONS FOR SUSTAINABLE MACHINING OF SINTERED POWDER METAL STEELS USING PCBN AND CARBIDE TOOLS.

    E-Print Network [OSTI]

    Joshi, Kunal J.

    2006-01-01T23:59:59.000Z

    ??Powder metals are becoming a popular choice in the automotive and other manufacturing industries because of their ability to meet wide ranging product functional requirements… (more)

  9. E-Print Network 3.0 - al-al2o3 nanocomposite powder Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    449451 (2007) 4650 Hardness and wear resistance of carbon Summary: , calcination and reduction. The molecular level process produces CNTCu nanocomposite powders, in which... the...

  10. Brown University is an Ivy League school that competes for today's brightest students and faculty. Biomedical Engineering at Brown creates new knowledge and improves human health through cross-disciplinary research

    E-Print Network [OSTI]

    Adams, Mark

    . Biomedical Engineering at Brown creates new knowledge and improves human health through cross, Biomechanics/Motion Sciences, Biosensing and Biomolecular Engineering, Biomaterials, and Biomedical device, mentoring the new generation of leaders in biomedical engineering, strong interest in undergraduate

  11. Theoretical Analysis for Obtaining Physical Properties of Composite Electrodes

    E-Print Network [OSTI]

    Weidner, John W.

    , 2003. Composite electrodes, composed of a mixture of electronically and ionically conducting materials and electronic conductivities of Nafion/ carbon composites. Shibuya et al.1 used an interdigitated arrayTheoretical Analysis for Obtaining Physical Properties of Composite Electrodes Parthasarathy M

  12. Treatment of biomass to obtain a target chemical

    DOE Patents [OSTI]

    Dunson, Jr., James B. (Newark, DE); Tucker, III, Melvin P. (Lakewood, CO); Elander, Richard T. (Evergreen, CO); Hennessey, Susan Marie (Avondale, PA)

    2010-08-24T23:59:59.000Z

    Target chemicals were produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  13. Terra-Gen Powers Coso Geothermal Facility Obtains Critical Federal...

    Open Energy Info (EERE)

    Obtains Critical Federal Permit to Increase Its Renewable Energy Generation Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Terra-Gen Powers Coso...

  14. Predicting cutability of lamb carcasses from easily obtainable carcass measurements

    E-Print Network [OSTI]

    Oliver, William McCoy

    1967-01-01T23:59:59.000Z

    . One of the purposes of this study was to determine which of several measures of carcass cutability could be estimated from easily obtainable weights and measures. The measures of cutability considered in the study may be described as follows: a...

  15. MnO spin-wave dispersion curves from neutron powder diffraction

    SciTech Connect (OSTI)

    Goodwin, Andrew L.; Dove, Martin T. [Department of Earth Sciences, Cambridge University, Downing Street, Cambridge CB2 3EQ (United Kingdom); Tucker, Matthew G. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Keen, David A. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Department of Physics, Oxford University, Clarendon Laboratory, Parks Road, Oxford OX1 3PU (United Kingdom)

    2007-02-15T23:59:59.000Z

    We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

  16. Conversion method of powder inelastic scattering data for one-dimensional systems

    SciTech Connect (OSTI)

    Tomiyasu, Dr. Keisuke [Tohoku University, Japan; Fujita, Prof. Masaki [Tohoku University, Japan; Kolesnikov, Alexander I [ORNL; Bewley, Robert I. [ISIS Facility, Rutherford Appleton Laboratory; Bull, Dr. Martyn J. [ISIS Facility, Rutherford Appleton Laboratory; Bennington, Dr. Stephen M. [ISIS Facility, Rutherford Appleton Laboratory

    2009-01-01T23:59:59.000Z

    Extracting dispersive magnetic excitations from inelastic neutron scattering data usually requires large single crystals. We present a simple yet powerful method for extracting such information from polycrystalline or powder data for one-dimensional systems. We demonstrate the effectiveness of this data treatment by extracting dispersion curves from powder inelastic neutron scattering data on the one-dimensional spin-half systems: CuGeO3 and Rb2Cu2Mo3O12. For many such materials it is not possible to grow sufficiently large crystals and this method offers a quick and efficient way to study their magnetic excitations.

  17. A Semi-Empirical Model Relating Flow Properties to Particle Contacts in Fine Binary Powder Mixtures

    E-Print Network [OSTI]

    Kojima, Takehiro; Elliott, James A.

    2014-08-20T23:59:59.000Z

    zone to 7 the onset of incipient flow is of wide benefit to a range of granular systems beyond EP 8 printing devices such as the processes of powder materials in pharmaceutical and food 9 industrials. 10 However, despite its importance, the number... additives have only a small effect on the internal friction [20]. In this study, 12 nm 17 hydrophobic silica nanoparticles, Aerosil® R805 (Evonik Industries, Germany), were chosen 18 as the surface additives for the PS-DVB powder particles. The BET surface...

  18. Plasma synthesis of lithium based intercalation powders for solid polymer electrolyte batteries

    DOE Patents [OSTI]

    Kong, Peter C. (Idaho Falls, ID); Pink, Robert J. (Pocatello, ID); Nelson, Lee O. (Idaho Falls, ID)

    2005-01-04T23:59:59.000Z

    The invention relates to a process for preparing lithium intercalation compounds by plasma reaction comprising the steps of: forming a feed solution by mixing lithium nitrate or lithium hydroxide or lithium oxide and the required metal nitrate or metal hydroxide or metal oxide and between 10-50% alcohol by weight; mixing the feed solution with O.sub.2 gas wherein the O.sub.2 gas atomizes the feed solution into fine reactant droplets, inserting the atomized feed solution into a plasma reactor to form an intercalation powder; and if desired, heating the resulting powder to from a very pure single phase product.

  19. Method for molding ceramic powders using a water-based gel casting

    DOE Patents [OSTI]

    Janney, Mark A. (Knoxville, TN); Omatete, Ogbemi O. (Lagos, NG)

    1991-07-02T23:59:59.000Z

    A method for molding ceramic powders comprises forming a slurry mixture including ceramic powder, a dispersant, and a monomer solution. The monomer solution includes at least one monofunctional monomer and at least one difunctional monomer, a free-radical initiator, and a aqueous solvent. The slurry mixture is transferred to a mold, and the mold containing the slurry mixture is heated to polymerize and crosslink the monomer and form a firm polymer-solvent gel matrix. The solid product any be removed from the mold and heated to first remove the solvent and subsequently remove the polymer, whereafter the product may be sintered.

  20. Method for molding ceramic powders using a water-based gel casting process

    DOE Patents [OSTI]

    Jenny, Mark A. (Knoxville, TN); Omalete, Ogbemi O. (Lagos, NG)

    1992-09-08T23:59:59.000Z

    A method for molding ceramic powders comprises forming a slurry mixture including ceramic powder, a dispersant, and a monomer solution. The monomer solution includes at least one monofunctional monomer and at least one difunctional monomer, a free-radical initiator, and a aqueous solvent. The slurry mixture is transferred to a mold, and the mold containing the slurry mixture is heated to polymerize and crosslink the monomer and form a firm polymer-solvent gel matrix. The solid product may be removed from the mold and heated to first remove the solvent and subsequently remove the polymer, whereafter the product may be sintered.

  1. Irish Astr. J., 27(1), XXXX, (2000) M. D. SMITH EVOLUTIONARY SCHEMES FOR PROTOSTARS, PROTO BROWN DWARFS

    E-Print Network [OSTI]

    Irish Astr. J., 27(1), XXXX, (2000) M. D. SMITH EVOLUTIONARY SCHEMES FOR PROTOSTARS, PROTO BROWN DWARFS AND THEIR ENVIRONMENTS M. D. SMITH Armagh Observatory, College Hill, Armagh, N. Ireland, BT61 9DG

  2. A T8.5 BROWN DWARF MEMBER OF THE {xi} URSAE MAJORIS SYSTEM

    SciTech Connect (OSTI)

    Wright, Edward L.; Mace, Gregory; McLean, Ian S. [UCLA Astronomy, P.O. Box 951547, Los Angeles, CA 90095-1547 (United States); Skrutskie, M. F.; Nelson, M. J.; Borish, H. J. [Department of Astronomy, University of Virginia, Charlottesville, VA 22904 (United States); Kirkpatrick, J. Davy; Gelino, Christopher R.; Griffith, Roger L.; Jarrett, Tom [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Marsh, Kenneth A. [School of Physics and Astronomy, Cardiff University, Cardiff CF243AA (United Kingdom); Mainzer, Amanda K.; Eisenhardt, Peter R. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8001 (United States); Tobin, John J. [National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States); Cushing, Michael C., E-mail: wright@astro.ucla.edu [Department of Physics and Astronomy, MS 111, University of Toledo, 2801 W. Bancroft St., Toledo, OH 43606-3328 (United States)

    2013-03-15T23:59:59.000Z

    The Wide-field Infrared Survey Explorer has revealed a T8.5 brown dwarf (WISE J111838.70+312537.9) that exhibits common proper motion with a solar-neighborhood (8 pc) quadruple star system-{xi} Ursae Majoris. The angular separation is 8.'5, and the projected physical separation is Almost-Equal-To 4000 AU. The sub-solar metallicity and low chromospheric activity of {xi} UMa A argue that the system has an age of at least 2 Gyr. The infrared luminosity and color of the brown dwarf suggests the mass of this companion ranges between 14 and 38 M{sub J} for system ages of 2 and 8 Gyr, respectively.

  3. THE DEPENDENCE OF BROWN DWARF RADII ON ATMOSPHERIC METALLICITY AND CLOUDS: THEORY AND COMPARISON WITH OBSERVATIONS

    SciTech Connect (OSTI)

    Burrows, Adam; Nampaisarn, Thane [Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States); Heng, Kevin, E-mail: burrows@astro.princeton.edu, E-mail: tnampais@astro.princeton.edu, E-mail: kheng@phys.ethz.ch [Institute for Advanced Study, School of Natural Sciences, 1 Einstein Drive, Princeton, NJ 08540 (United States)

    2011-07-20T23:59:59.000Z

    Employing realistic and consistent atmosphere boundary conditions, we have generated evolutionary models for brown dwarfs and very low mass stars (VLMs) for different atmospheric metallicities ([Fe/H]), with and without clouds. We find that the spread in radius at a given mass and age can be as large as {approx}10% to {approx}25%, with higher-metallicity, higher-cloud-thickness atmospheres resulting quite naturally in larger radii. For each 0.1 dex increase in [Fe/H], radii increase by {approx}1% to {approx}2.5%, depending upon the age and mass. We also find that, while for smaller masses and older ages brown dwarf radii decrease with increasing helium fraction (Y, as expected), for more massive brown dwarfs and a wide range of ages they increase with helium fraction. The increase in radius in going from Y = 0.25 to Y = 0.28 can be as large as {approx}0.025 R{sub J} ({approx}2.5%). Furthermore, we find that for VLMs an increase in atmospheric metallicity from 0.0 to 0.5 dex, increases radii by {approx}4%, and from -0.5 to 0.5 dex by {approx}10%. Therefore, we suggest that opacity due to higher metallicity might naturally account for the apparent radius anomalies in some eclipsing VLM systems. Ten to twenty-five percent variations in radius exceed errors stemming from uncertainties in the equation of state alone. This serves to emphasize that transit and eclipse measurements of brown dwarf radii constrain numerous effects collectively, importantly including the atmosphere and condensate cloud models, and not just the equation of state. At all times, one is testing a multi-parameter theory, and not a universal radius-mass relation.

  4. A comparison of selected quality and compositional characteristics of brown and white shell eggs

    E-Print Network [OSTI]

    Curtis, Patricia Ann

    1982-01-01T23:59:59.000Z

    for the degree of MASTER OF SCIENCE December 1982 Major Subject: Food Science and Tecnnology A COMPARISON OF SELECTED QUALITI AND COMPOSITIONAL CHARACTERISITICS OF HROWN AND WHITE SHELL EGGS A Thesis by PATRICIA ANN CURTIS Approved as to style... and cortent by: (Chairman of Committee) (Department ead) (Member) -'(, ( ember) ip (Member) December 1982 ABSTRACT A Comparison of Selected Quality and Compositional Characteristics of Brown and White Shell Eggs (December 1982) Patricia Ann Curtis...

  5. Spectroscopy of New Substellar Candidates in the Pleiades: Towards a Spectral Sequence for Young Brown Dwarfs

    E-Print Network [OSTI]

    E. L. Martin; R. Rebolo; M. R. Zapatero Osorio

    1996-04-15T23:59:59.000Z

    We present optical and near-IR spectroscopy (600--1000 nm) of 8 faint (I$>$18) very red (R--I$>$2.2) objects discovered in a deep CCD survey of the Pleiades (Zapatero-Osorio et al. 1996). We compare them with reliable cluster members like PPl 15 and Teide 1, and with several field very late-type dwarfs (M4--M9.5), which were observed with similar instrumental configurations. Using pseudocontinuum ratios we classify the new substellar candidates in a spectal sequence defined with reference to field stars of known spectral types. We also reclassify PPl 15 and Teide 1 in a self-consistent way. The likelihood of membership for the new candidates is assesed via the study of their photospheric features, Ha emission, radial velocity, and consistency of their spectral types and I magnitudes with known cluster members. Four of the new substellar candidates are as late or later than PPl~15 (M6.5), but only one, Calar 3 (M8), clearly meets all our membership criteria. It is indeed an object very similar to the brown dwarf Teide 1. Calar 3, together with Teide 1, allows one to compare the spectroscopic characteristics of Pleiades brown dwarfs with those of old very cool dwarfs. The overall spectral properties are similar, but there are slight differences in the NaI doublet (818.3 nm, 819.5 nm), VO molecular band (740 nm), and some spectral ratios, which are probably related to lower surface gravity in the young Pleiades brown dwarfs than in field stars. Finally, we propose a way of improving future CCD-based brown dwarf surveys by using narrow-band near-IR pseudocontinuum filters.

  6. SUBSTELLAR OBJECTS IN NEARBY YOUNG CLUSTERS (SONYC). V. NEW BROWN DWARFS IN {rho} OPHIUCHI

    SciTech Connect (OSTI)

    Muzic, Koraljka; Jayawardhana, Ray [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4 (Canada); Scholz, Alexander [School of Cosmic Physics, Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2 (Ireland); Geers, Vincent [Institut fuer Astronomie, ETH, Wolfgang-Pauli-Strasse 27, 8093 Zuerich (Switzerland); Tamura, Motohide, E-mail: muzic@astro.utoronto.ca [National Astronomical Observatory, Osawa 2-21-2, Mitaka, Tokyo 181 (Japan)

    2012-01-10T23:59:59.000Z

    SONYC-Substellar Objects in Nearby Young Clusters-is a survey program to investigate the frequency and properties of substellar objects with masses down to a few times that of Jupiter in nearby star-forming regions. For the {approx}1 Myr old {rho} Ophiuchi cluster, in our earlier paper we reported deep, wide-field optical and near-infrared imaging using Subaru, combined with Two Micron All Sky Survey and Spitzer photometry, as well as follow-up spectroscopy confirming three likely cluster members, including a new brown dwarf with a mass close to the deuterium-burning limit. Here we present the results of extensive new spectroscopy targeting a total of {approx}100 candidates in {rho} Oph, with Fiber Multi Object Spectrograph at the Subaru Telescope and SINFONI at the ESO's Very Large Telescope. We identify 19 objects with effective temperatures at or below 3200 K, eight of which are newly identified very low mass probable members of {rho} Oph. Among these eight, six objects have T{sub eff} {<=} 3000 K, confirming their likely substellar nature. These six new brown dwarfs comprise one-fifth of the known substellar population in {rho} Oph. We estimate that the number of missing substellar objects in our survey area is {approx}15, down to 0.003-0.03 M{sub Sun} and for A{sub V} = 0-15. The upper limit on the low-mass star to brown dwarf ratio in {rho} Oph is 5.1 {+-} 1.4, while the disk fractions are {approx}40% and {approx}60% for stars and brown dwarfs, respectively. Both results are in line with those for other nearby star-forming regions.

  7. Productivity and Quality of Brown Midrib (bmr) Sorghum Varieties to Producers in Central America

    E-Print Network [OSTI]

    Portillo Rodriguez, Ostilio Rolando

    2013-05-01T23:59:59.000Z

    PRODUCTIVITY AND QUALITY OF BROWN MIDRIB (BMR) SORGHUM VARIETIES TO PRODUCERS IN CENTRAL AMERICA A Thesis by OSTILIO ROLANDO PORTILLO RODRIGUEZ Submitted to the Office of Graduate Studies of Texas A&M University in the partial... for Honduras, Guatemala and Nicaragua across several environments. iii ACKNOWLEDGEMENTS I would like to thank God Almighty for his blessings which made this cultural and academic experience at Texas A&M University a reality. I also would like...

  8. Brown snow: A long-range transport event in the Canadian Arctic

    SciTech Connect (OSTI)

    Welch, H.E.; Muir, D.C.G.; Billeck, B.N.; Lockhart, W.L.; Brunskill, G.J.; Kling, H.J. (Freshwater Inst., Winnipeg (Canada)); Olson, M.P. (Atmospheric Environment Service, Downsview, Ontario (Canada)); Lemoine, R.M. (Hardy BBT Ltd., Winnipeg, Manitoba (Canada))

    1991-02-01T23:59:59.000Z

    The authors document the occurrence of a long-range transport event that deposited thousands of tons of fine particulates on the District of Keewatin, central Canadian Arctic, {approximately}63 N. Air mass trajectories, clay mineral composition, soot particles, and visible organic remains point to Asian sources for the brown snow material, probably western China. Semivolatile organic pollutants detected in the brown snow included polycyclic aromatic hydrocarbons ({Sigma}PAH), PCB congeners, and DDT-related compounds ({Sigma}DDT), polychlorinated camphenes (PCCs), as well as the herbicide trifuluralin and insecticides methoxychlor, endosulfan, and hexachlorocyclohexane (HCH). {Sigma}PAH, PCB, and PCC concentrations were within the range reported in other studies of Arctic snow but {Sigma}DDT levels were 2-10 times higher than previous reports. High molecular weight PAH may have been associated with soot particles in the brown snow but evidence for Asian sources of the pesticides was not strong because of unknown source signal strengths and possible atmospheric transformations of the compounds. Fluxes of these pollutants were also determined by analyzing sediment cores from two small headwater lakes near the sampling site. The quantities of pollutants deposited in this single event may have comprised a significant fraction (>10%) of total annual input {Sigma}PAH and {Sigma}DDT, as determined from lake sedimentation records.

  9. Humic substances and nitrogen-containing compounds from low rank brown coals

    SciTech Connect (OSTI)

    Demirbas, A.; Kar, Y.; Deveci, H. [Selcuk University, Konya (Turkey). Department of Chemical Engineering

    2006-03-15T23:59:59.000Z

    Coal is one of the sources of nitrogen-containing compounds (NCCs). Recovery of NCCs from brown coals in high yield was carried out from tars of stepwise semicoking of brown coals. Humic acids have been shown to contain many types of nitrogen compounds. Humic acids are thought to be complex aromatic macromolecules with amino acids, amino sugars, peptides, and aliphatic compounds that are involved in the linkages between the aromatic groups. Humic acids extracted from peats, brown coals, and lignites, are characterized using different techniques. Humic substances (HSs) have several known benefits to agriculture. The properties of humic substances vary from source to source, because they are heterogeneous mixtures of biochemical degradation products from plant and animal residues, and synthesis activities of microorganisms. HSs have been considered to be a significant floculant in surface water filtration plants for the production of drinking water as well as the processing of water. HSs are produced from chemical and biological degradation of plant and animal residues and from synthetic activities of microorganisms.

  10. Accretion-ejection connection in the young brown dwarf candidate ISO-Cha1 217

    E-Print Network [OSTI]

    Whelan, E T; Bacciotti, F; Nisini, B; Bonito, R; Antoniucci, S; Stelzer, B; Biazzo, K; D'Elia, V; Ray, T P

    2014-01-01T23:59:59.000Z

    As the number of observed brown dwarf outflows is growing it is important to investigate how these outflows compare to the well studied jets from young stellar objects. A key point of comparison is the relationship between outflow and accretion activity and in particular the ratio between the mass outflow and accretion rates ($\\dot{M}_{out}$/$\\dot{M}_{acc}$). The brown dwarf candidate ISO-ChaI 217 was discovered by our group, as part of a spectro-astrometric study of brown dwarfs, to be driving an asymmetric outflow with the blue-shifted lobe having a position angle of $\\sim$ 20$^{\\circ}$. The aim here is to further investigate the properties of ISO-ChaI 217, the morphology and kinematics of its outflow, and to better constrain ($\\dot{M}_{out}$/$\\dot{M}_{acc}$). The outflow is spatially resolved in the $[SII]\\lambda \\lambda 6716,6731$ lines and is detected out to $\\sim$ 1\\farcs6 in the blue-shifted lobe and ~ 1" in the red-shifted lobe. The asymmetry between the two lobes is confirmed although the velocity as...

  11. Hydrothermal Synthesis of Dy-Doped BaTiO3 Powders ERSIN E. OREN and A. CUNEYT TAS

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    . Hydrothermal processing sis method used and temperature, may exhibit four different of BaTiO3 powders has) are "ferroelectric." hydrothermal processing required a pH 12 in the aqueous BaTiO3 is of the tetragonal symmetryHydrothermal Synthesis of Dy-Doped BaTiO3 Powders ERSIN E. OREN and A. CUNEYT TAS Submicron

  12. Groundwater recharge estimates using a soil-water-balance model for the Powder River and Williston structural basins

    E-Print Network [OSTI]

    Torgersen, Christian

    Groundwater recharge estimates using a soil-water-balance model for the Powder River and Williston for the lower Tertiary and Upper Cretaceous aquifer system in the Powder River and Williston structural basins in the Williston structural basin will require trillions of gallons of water from this aquifer system over the next

  13. Without proper controls, consolidation could influence performance in the Powder River Basin

    SciTech Connect (OSTI)

    Bierman, S.; Nelson, P.

    2005-08-01T23:59:59.000Z

    The American coal industry is in a period of consolidation. Fewer firms with larger production are replacing a more dispersed industry. Because of the southern Powder River Basin's great importance as source of coal, there is a need to monitor the performance of southern PRB coal producers.

  14. Frictional powders: Ratcheting under periodic strain in 3D , C. T. David2

    E-Print Network [OSTI]

    Luding, Stefan

    Frictional powders: Ratcheting under periodic strain in 3D S. Luding1 , C. T. David2 , R. Garcia the (deviatoric) stress- strain relation a ratchet-like behavior is observed: Increasing the coefficient of friction leads to a transition from ratcheting to shake-down, i.e., the accumulation of strain stops

  15. FORT UNION COAL IN THE POWDER RIVER BASIN, WYOMING AND MONTANA: A SYNTHESIS

    E-Print Network [OSTI]

    ...................................................................................PS-18 Coal-Bed Methane ResourceChapter PS FORT UNION COAL IN THE POWDER RIVER BASIN, WYOMING AND MONTANA: A SYNTHESIS By R of selected Tertiary coal beds and zones in the Northern RockyMountains and Great Plains region, U

  16. Chemical Preparation of Pure and Strontium-and/or Magnesium-Doped Lanthanum Gallate Powders

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Chemical Preparation of Pure and Strontium- and/or Magnesium-Doped Lanthanum Gallate Powders A. Cu) ceramics that have been doped with strontium and/or magnesium are known to have superior oxygen re- cently synthesized strontium- and magnesium-doped LaGaO3 ceramics, using the conventional "solid

  17. A modified Drucker-Prager Cap model for die compaction simulation of pharmaceutical powders

    E-Print Network [OSTI]

    Elliott, James

    ;1. Introduction As the most widely used dosage form for drug delivery in the pharmaceutical industry, tablets haveA modified Drucker-Prager Cap model for die compaction simulation of pharmaceutical powders L Institute for Pharmaceutical Materials Science, Department of Materials Science and Metallurgy, University

  18. Development of lifetime test procedure for powder evacuated panel insulation. CRADA final report

    SciTech Connect (OSTI)

    Wilkes, K E; Graves, R S; Childs, K W

    1996-03-01T23:59:59.000Z

    This CRADA is between Appliance Research Consortium (ARC) of the Association of Home Appliance Manufacturers (AHAM) and the Lockheed Martin Energy Research Corp. A Powder Evacuated Panel (PEP) is a "super" thermal insulation, having a thermal resistivity (R) substantially above that of existing insulation without the environmental problems of some insulations such as Chlorofluorocarbon (CFC) blown foam.

  19. Powder Technology, 56 (1988) 259 -277 259 Studies in Magnetochemical Engineering

    E-Print Network [OSTI]

    Liu, Y. A.

    Powder Technology, 56 (1988) 259 - 277 259 Studies in Magnetochemical Engineering: Part IV. A Fluidized-Bed Superconducting Magnetic Separation Process for Dry Coal Desulfurization* Y. A. LIU separation process for desulfurization of dry pulverized coal for utility boiler applications (typically

  20. Gas-powder flow in blast furnace with different shapes of cohesive zone

    SciTech Connect (OSTI)

    Dong, X.F.; Pinson, D.; Zhang, S.J.; Yu, A.B.; Zulli, P. [University of New South Wales, Sydney, NSW (Australia)

    2006-11-15T23:59:59.000Z

    With high PCI rate operations, a large quantity of unburned coal/char fines will flow together with the gas into the blast furnace. Under some operating conditions, the holdup of fines results in deterioration of furnace permeability and lower production efficiency. Therefore, it is important to understand the behaviour of powder (unburnt coal/char) inside the blast furnace when operating with different cohesive zone (CZ) shapes. This work is mainly concerned with the effect of cohesive zone shape on the powder flow and accumulation in a blast furnace. A model is presented which is capable of simulating a clear and stable accumulation region in the lower central region of the furnace. The results indicate that powder is likely to accumulate at the lower part of W-shaped CZs and the upper part of V- and inverse V-shaped CZs. For the same CZ shape, a thick cohesive layer can result in a large pressure drop while the resistance of narrow cohesive layers to gas-powder flow is found to be relatively small. Implications of the findings to blast furnace operation are also discussed.

  1. Catalytically Assisted Self-Propagating High-Temperature Synthesis of Tantalum Carbide Powders

    E-Print Network [OSTI]

    Wooldridge, Margaret S.

    Catalytically Assisted Self-Propagating High-Temperature Synthesis of Tantalum Carbide Powders Troy high-temperature combustion synthesis (SHS) of materials has gained recognition for its energy in the context of gas-phase and solid-phase transport models. I. Introduction IN RECENT years, self-propagating

  2. Chemical Synthesis of Pure and Gd-doped CaZrO3 Powders

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    chemical synthesis techniques: (i) self-propagating combustion synthesis, and (ii) precipitation potential use as a high-temperature thermistor material.8 The electrical response of calcium zirconate (preChemical Synthesis of Pure and Gd-doped CaZrO3 Powders I. Erkin Gonenli a and A. CuÃ? neyt Tas b

  3. Reuse of textile powder remainders for acoustic applications using the Wet-Laid technology

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    are like a powder with difficult recycling, but it can be recycled by means of Wet-Laid Technology study about the acoustic behaviour of nonwoven materials combined with recycled polyester. The recycled polyester used in these combinations has been manufactured from remains of plastic bottles (PET

  4. Economic Analysis of Carbon Dioxide Sequestration in Powder River Basin Coal

    SciTech Connect (OSTI)

    Eric P. Robertson

    2009-01-01T23:59:59.000Z

    Unminable coalbeds are potentially large storage reservoirs for the sequestration of anthropogenic CO2 and offer the benefit of enhanced methane production, which can offset some of the costs associated with CO2 sequestration. The objective of this paper is to study the economic feasibility of CO2 sequestration in unminable coal seams in the Powder River Basin of Wyoming. Economic analyses of CO2 injection options are compared. Results show that injecting flue gas to recover methane from CBM fields is marginally economical; however, this method will not significantly contribute to the need to sequester large quantities of CO2. Separating CO2 from flue gas and injecting it into the unminable coal zones of the Powder River Basin seam is currently uneconomical, but can effectively sequester over 86,000 tons (78,200 tonne) of CO2 per acre while recovering methane to offset costs. The cost to separate CO2 from flue gas was identified as the major cost driver associated with CO2 sequestration in unminable coal seams. Improvements in separations technology alone are unlikely to drive costs low enough for CO2 sequestration in unminable coal seams in the Powder River Basin to become economically viable. Breakthroughs in separations technology could aid the economics, but in the Powder River Basin they cannot achieve the necessary cost reductions for breakeven economics without incentives.

  5. MODELING THE MEAN INTERACTION FORCES BETWEEN POWDER APPLICATION TO SILICA GEL-MAGNESIUM STEARATE MIXTURES.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 MODELING THE MEAN INTERACTION FORCES BETWEEN POWDER PARTICLES. APPLICATION TO SILICA GEL-MAGNESIUM) particles (d50 = 55 µm) were coated with fine invited particles of magnesium stearate (MS, d50 = 4.6 µm. Interaction forces between the material attached to the cantilever (Magnesium Stearate MS) and the surface

  6. Method of manufacturing iron aluminide by thermomechanical processing of elemental powders

    DOE Patents [OSTI]

    Deevi, Seetharama C. (Midlothian, VA); Lilly, Jr., A. Clifton (Chesterfield, VA); Sikka, Vinod K. (Oak Ridge, TN); Hajaligol, Mohammed R. (Richmond, VA)

    2000-01-01T23:59:59.000Z

    A powder metallurgical process of preparing iron aluminide useful as electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 20 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1 % rare earth metal, .ltoreq.1% oxygen, and/or .ltoreq.3% Cu. The process includes forming a mixture of aluminum powder and iron powder, shaping the mixture into an article such as by cold rolling the mixture into a sheet, and sintering the article at a temperature sufficient to react the iron and aluminum powders and form iron aluminide. The sintering can be followed by hot or cold rolling to reduce porosity created during the sintering step and optional annealing steps in a vacuum or inert atmosphere.

  7. COAL RESOURCES, POWDER RIVER BASIN By M.S. Ellis,1

    E-Print Network [OSTI]

    , Delaware 1999 Resource assessment of selected Tertiary coal beds and zones in the Northern Rocky in the toolbar to return. 1999 Resource assessment of selected Tertiary coal beds and zones in the Northern Rocky resources in the Powder River Basin reported by 7.5-minute quadrangle map area 1999 Resource assessment

  8. Mechanical properties of WC10Co cemented carbides sintered from nanocrystalline spray conversion processed powders

    E-Print Network [OSTI]

    Hong, Soon Hyung

    Mechanical properties of WC±10Co cemented carbides sintered from nanocrystalline spray conversion as the spray conversion process [2]. The WC particle sizes in powders fabricated by the spray conversion: microstructural parameters such as WC grain size, Co mean free path and WC/WC contiguity; chemical factors

  9. Stereochemistry Determination by Powder X-ray Diffraction Analysis and NMR Spectroscopy Residual Dipolar Couplings

    SciTech Connect (OSTI)

    Garcia, M.; Pagola, S; Navarro-Vasquez, A; Phillips, D; Gayathri, C; Krakauer, H; Stephens, P; Nicotra, V; Gil, R

    2009-01-01T23:59:59.000Z

    A matter of technique: For a new steroidal lactol, jaborosalactol 24 (1), isolated from Jaborosa parviflora, NMR spectroscopy residual dipolar couplings and powder X-ray diffraction analysis independently gave the same stereochemistry at C23-C26. Conventional NMR spectroscopic techniques, such as NOE and {sup 3}J coupling-constant analysis failed to unambiguously determine this stereochemistry.

  10. Evaluation of Dried Plum Powder in Meat Products Destined for Convenience and Foodservice Outlets

    E-Print Network [OSTI]

    Merrill, Robert M.

    2011-08-08T23:59:59.000Z

    Antioxidant activity of dried plum powder (DPP) at 3% was compared to rosemary extract (RE) at 0.05% in turkey breakfast sausages which were stored under three aerobic conditions: raw refrigerated (RR; 6 degrees C), raw and precooked frozen (RF...

  11. SHERIDAN COALFIELD, POWDER RIVER BASIN: GEOLOGY, COAL QUALITY, AND COAL RESOURCES

    E-Print Network [OSTI]

    Chapter PH SHERIDAN COALFIELD, POWDER RIVER BASIN: GEOLOGY, COAL QUALITY, AND COAL RESOURCES By M assessment of selected Tertiary coal beds and zones in the Northern RockyMountains and Great Plains region, U Resource assessment of selected Tertiary coal beds and zones in the Northern Rocky Mountains and Great

  12. Maximum Entropy Method and Charge Flipping, a Powerful Combination to Visualize the True Nature of Structural Disorder from in situ X-ray Powder Diffraction Data

    SciTech Connect (OSTI)

    Samy, A.; Dinnebier, R; van Smaalen, S; Jansen, M

    2010-01-01T23:59:59.000Z

    In a systematic approach, the ability of the Maximum Entropy Method (MEM) to reconstruct the most probable electron density of highly disordered crystal structures from X-ray powder diffraction data was evaluated. As a case study, the ambient temperature crystal structures of disordered {alpha}-Rb{sub 2}[C{sub 2}O{sub 4}] and {alpha}-Rb{sub 2}[CO{sub 3}] and ordered {delta}-K{sub 2}[C{sub 2}O{sub 4}] were investigated in detail with the aim of revealing the 'true' nature of the apparent disorder. Different combinations of F (based on phased structure factors) and G constraints (based on structure-factor amplitudes) from different sources were applied in MEM calculations. In particular, a new combination of the MEM with the recently developed charge-flipping algorithm with histogram matching for powder diffraction data (pCF) was successfully introduced to avoid the inevitable bias of the phases of the structure-factor amplitudes by the Rietveld model. Completely ab initio electron-density distributions have been obtained with the MEM applied to a combination of structure-factor amplitudes from Le Bail fits with phases derived from pCF. All features of the crystal structures, in particular the disorder of the oxalate and carbonate anions, and the displacements of the cations, are clearly obtained. This approach bears the potential of a fast method of electron-density determination, even for highly disordered materials. All the MEM maps obtained in this work were compared with the MEM map derived from the best Rietveld refined model. In general, the phased observed structure factors obtained from Rietveld refinement (applying F and G constraints) were found to give the closest description of the experimental data and thus lead to the most accurate image of the actual disorder.

  13. Brain Mapping Using Topology Graphs Obtained by Surface Segmentation

    E-Print Network [OSTI]

    Linsen, Lars

    Brain Mapping Using Topology Graphs Obtained by Surface Segmentation Fabien Vivodtzev1 , Lars@ucdavis.edu Summary. Brain mapping is a technique used to alleviate the tedious and time- consuming process of annotating brains by mapping existing annotations from brain atlases to individual brains. We introduce

  14. INSTRUCTIONS FOR OBTAINING CENSUS DATA FROM E-STAT

    E-Print Network [OSTI]

    Haykin, Simon

    Titlelink to connect to E-Stat. You may be asked to enter a user ID and password (depending on where you are). Just1 INSTRUCTIONS FOR OBTAINING CENSUS DATA FROM E-STAT Go to the Library homepage http://library.mcmaster.ca Click on the FIND ARTICLES tab. Click on the letter E and scroll down to find E-Stat. Clickonthe

  15. Damping filter method for obtaining spatially localized solutions

    E-Print Network [OSTI]

    Toshiki Teramura; Sadayoshi Toh

    2014-04-30T23:59:59.000Z

    Spatially localized structures are key components of turbulence and other spatio-temporally chaotic systems. From a dynamical systems viewpoint, it is desirable to obtain corresponding exact solutions, though their existence is not guaranteed. A damping filter method is introduced to obtain variously localized solutions, and adopted into two typical cases. This method introduces a spatially selective damping effect to make a good guess at the exact solution, and we can obtain an exact solution through a continuation with the damping amplitude. First target is a steady solution to Swift-Hohenberg equation, which is a representative of bi-stable systems in which localized solutions coexist, and a model for span-wisely localized cases. Not only solutions belonging to the well-known snaking branches but also those belonging to an isolated branch known as "isolas" are found with a continuation paths between them in phase space extended with the damping amplitude. This indicates that this spatially selective excitation mechanism has an advantage in searching spatially localized solutions. Second target is a spatially localized traveling-wave solution to Kuramoto-Sivashinsky equation, which is a model for stream-wisely localized cases. Since the spatially selective damping effect breaks Galilean and translational invariances, the propagation velocity cannot be determined uniquely while the damping is active, and a singularity arises when these invariances are recovered. We demonstrate that this singularity can be avoided by imposing a simple condition, and a localized traveling-wave solution is obtained with a specific propagation speed.

  16. OBTAINING EMPLOYMENT AT THE UNIVERSITY OF HAWAI`I

    E-Print Network [OSTI]

    Olsen, Stephen L.

    OBTAINING EMPLOYMENT AT THE UNIVERSITY OF HAWAI`I Employees at the University of Hawai`i fall into one of four distinct categories of employment ­ civil service, faculty, administrative of Campus Security Policy and Campus Crime Statistics Act, annual campus crime statistics for the University

  17. Fabrication of metal matrix composite by semi-solid powder processing

    SciTech Connect (OSTI)

    Wu, Yufeng [Ames Laboratory

    2012-11-28T23:59:59.000Z

    Various metal matrix composites (MMCs) are widely used in the automotive, aerospace and electrical industries due to their capability and flexibility in improving the mechanical, thermal and electrical properties of a component. However, current manufacturing technologies may suffer from insufficient process stability and reliability and inadequate economic efficiency and may not be able to satisfy the increasing demands placed on MMCs. Semi-solid powder processing (SPP), a technology that combines traditional powder metallurgy and semi-solid forming methods, has potential to produce MMCs with low cost and high efficiency. In this work, the analytical study and experimental investigation of SPP on the fabrication of MMCs were explored. An analytical model was developed to understand the deformation mechanism of the powder compact in the semi-solid state. The densification behavior of the Al6061 and SiC powder mixtures was investigated with different liquid fractions and SiC volume fractions. The limits of SPP were analyzed in terms of reinforcement phase loading and its impact on the composite microstructure. To explore adoption of new materials, carbon nanotube (CNT) was investigated as a reinforcing material in aluminum matrix using SPP. The process was successfully modeled for the mono-phase powder (Al6061) compaction and the density and density distribution were predicted. The deformation mechanism at low and high liquid fractions was discussed. In addition, the compaction behavior of the ceramic-metal powder mixture was understood, and the SiC loading limit was identified by parametric study. For the fabrication of CNT reinforced Al6061 composite, the mechanical alloying of Al6061-CNT powders was first investigated. A mathematical model was developed to predict the CNT length change during the mechanical alloying process. The effects of mechanical alloying time and processing temperature during SPP were studied on the mechanical, microstructural and compositional properties of the Al6061-CNT composites. A shear lag model was applied to predict the mechanical property (hardness) of the composite. This work demonstrated the promising potential of SPP in the fabrication of particle/fiber (nanotube) reinforced MMCs.

  18. A comprehensive review on the hydro metallurgical process for the production of nickel and copper powders by hydrogen reduction

    SciTech Connect (OSTI)

    Agrawal, A. [Non Ferrous Process Group, National Metallurgical Laboratory, Jamshedpur 831007 (India)]. E-mail: archana@nmlindia.com; Kumar, V. [Non Ferrous Process Group, National Metallurgical Laboratory, Jamshedpur 831007 (India); Pandey, B.D. [Non Ferrous Process Group, National Metallurgical Laboratory, Jamshedpur 831007 (India); Sahu, K.K. [Non Ferrous Process Group, National Metallurgical Laboratory, Jamshedpur 831007 (India)

    2006-04-13T23:59:59.000Z

    Production of nickel and copper powders from leach solutions and other aqueous streams by hydrogen reduction under pressure has been reviewed in the present paper. By optimising the optimum process condition, powders or composite materials of required specification could be produced from different types of acidic and alkaline solutions by coating nickel or copper powders on the secondary materials such as graphite, tungsten carbide and aluminium. The paper also highlights the kinetics of reduction and the use of various inorganic and organic additives to improve the quality of the powder on bench and commercial scale. Effect of various experimental factors such as pH of the solution, concentration of metals, particle size and nature of additives, operating condition of autoclave, etc. on the rate of reduction and quality of powder are also discussed.

  19. Method of manufacturing aluminide sheet by thermomechanical processing of aluminide powders

    DOE Patents [OSTI]

    Hajaligol, Mohammad R. (Midlothian, VA); Scorey, Clive (Cheshire, CT); Sikka, Vinod K. (Oak Ridge, TN); Deevi, Seetharama C. (Midlothian, VA); Fleischhauer, Grier (Midlothian, VA); Lilly, Jr., A. Clifton (Chesterfield, VA); German, Randall M. (State College, PA)

    2000-01-01T23:59:59.000Z

    A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.0.05% Zr.ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Ni, .ltoreq.0.75% C, .ltoreq.0.1% B, .ltoreq.1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, and/or .ltoreq.3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 .mu.m. Final stress relief annealing can be carried out in the B2 phase temperature range.

  20. Obtaining and Using USDA Market and Production Reports

    E-Print Network [OSTI]

    Bevers, Stan; Amosson, Stephen H.; Smith, Jackie; O'Brien, Daniel

    2008-10-07T23:59:59.000Z

    Obtaining and Using USDA Market and Production Reports Risk Management E-490 RM2-11.0 09-08 *Professors and Extension Economists?Management, The Texas A&M System. It has been said that ?accurate and timely in- formation is the lubricant... organizations. Public information is commonly available from the United States Department of Agriculture (USDA) and land grant universities. USDA is responsible for collecting and reporting to the public a vast array of information on virtually every...

  1. Obtaining anisotropic velocity data for proper depth seismic imaging

    SciTech Connect (OSTI)

    Egerev, Sergey; Yushin, Victor; Ovchinnikov, Oleg; Dubinsky, Vladimir; Patterson, Doug [Andreyev Acoustics Institute, Moscow, 117036 (Russian Federation); Baker Hughes, Inc, 2001 Rankin Road, Houston, TX, 77073 (United States)

    2012-05-24T23:59:59.000Z

    The paper deals with the problem of obtaining anisotropic velocity data due to continuous acoustic impedance-based measurements while scanning in the axial direction along the walls of the borehole. Diagrams of full conductivity of the piezoceramic transducer were used to derive anisotropy parameters of the rock sample. The measurements are aimed to support accurate depth imaging of seismic data. Understanding these common anisotropy effects is important when interpreting data where it is present.

  2. Tungsten and tungsten alloy powder metallurgy: Powder production and applications excluding lamps. (Latest citations from the US Patent bibliographic file with exemplary claims). Published Search

    SciTech Connect (OSTI)

    NONE

    1997-01-01T23:59:59.000Z

    The bibliography contains citations of selected patents concerning the preparation of metallic and ceramic powders of tungsten and tungsten alloys, including applications of these materials. The hydrogen reduction of tungsten compounds together with alloying element compounds produce forms with characteristics of high density, hardness, wear resistance, high melting points, and abrasiveness. Topics include production of cathodes, heaters, filament wires, electrical contacts, acoustic absorbers, high-density sheets and coatings, hard penetrators, and tungsten carbide and metallized ceramics. Tungsten halogen lamps are examined in a separate bibliography.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  3. Tungsten and tungsten alloy powder metallurgy: Powder production and applications excluding lamps. (Latest citations from the US Patent bibliographic file with exemplary claims). Published Search

    SciTech Connect (OSTI)

    Not Available

    1994-04-01T23:59:59.000Z

    The bibliography contains citations of selected patents concerning the preparation of metallic and ceramic powders of tungsten and tungsten alloys, including applications of these materials. The hydrogen reduction of tungsten compounds together with alloying element compounds produce forms with characteristics of high density, hardness, wear resistance, high melting points, and abrasiveness. Topics include production of cathodes, heaters, filament wires, electrical contacts, acoustic absorbers, high-density sheets and coatings, hard penetrators, and tungsten carbide and metallized ceramics. (Contains a minimum of 109 citations and includes a subject term index and title list.)

  4. Tungsten and tungsten alloy powder metallurgy: Powder production and applications excluding lamps. (Latest citations from the US Patent database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-05-01T23:59:59.000Z

    The bibliography contains citations of selected patents concerning the preparation of metallic and ceramic powders of tungsten and tungsten alloys, including applications of these materials. The hydrogen reduction of tungsten compounds together with alloying element compounds produce forms with characteristics of high density, hardness, wear resistance, high melting points, and abrasiveness. Topics include production of cathodes, heaters, filament wires, electrical contacts, acoustic absorbers, high-density sheets and coatings, hard penetrators, and tungsten carbide and metallized ceramics. Tungsten halogen lamps are examined in a separate bibliography. (Contains a minimum of 97 citations and includes a subject term index and title list.)

  5. Tungsten and tungsten alloy powder metallurgy: Powder production and applications excluding lamps. (Latest citations from the US Patent bibliographic file with exemplary claims). Published Search

    SciTech Connect (OSTI)

    NONE

    1995-12-01T23:59:59.000Z

    The bibliography contains citations of selected patents concerning the preparation of metallic and ceramic powders of tungsten and tungsten alloys, including applications of these materials. The hydrogen reduction of tungsten compounds together with alloying element compounds produce forms with characteristics of high density, hardness, wear resistance, high melting points, and abrasiveness. Topics include production of cathodes, heaters, filament wires, electrical contacts, acoustic absorbers, high-density sheets and coatings, hard penetrators, and tungsten carbide and metallized ceramics. Tungsten halogen lamps are examined in a separate bibliography.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  6. Tungsten and tungsten alloy powder metallurgy: Powder production and applications excluding lamps. (Latest citations from the US Patent bibliographic file with exemplary claims). Published Search

    SciTech Connect (OSTI)

    NONE

    1995-02-01T23:59:59.000Z

    The bibliography contains citations of selected patents concerning the preparation of metallic and ceramic powders of tungsten and tungsten alloys, including applications of these materials. The hydrogen reduction of tungsten compounds together with alloying element compounds produce forms with characteristics of high density, hardness, wear resistance, high melting points, and abrasiveness. Topics include production of cathodes, heaters, filament wires, electrical contacts, acoustic absorbers, high-density sheets and coatings, hard penetrators, and tungsten carbide and metallized ceramics. Tungsten halogen lamps are examined in a separate bibliography. (Contains a minimum of 115 citations and includes a subject term index and title list.)

  7. Near-Net Shape Fabrication Using Low-Cost Titanium Alloy Powders

    SciTech Connect (OSTI)

    Dr. David M. Bowden; Dr. William H. Peter

    2012-03-31T23:59:59.000Z

    The use of titanium in commercial aircraft production has risen steadily over the last half century. The aerospace industry currently accounts for 58% of the domestic titanium market. The Kroll process, which has been used for over 50 years to produce titanium metal from its mineral form, consumes large quantities of energy. And, methods used to convert the titanium sponge output of the Kroll process into useful mill products also require significant energy resources. These traditional approaches result in product forms that are very expensive, have long lead times of up to a year or more, and require costly operations to fabricate finished parts. Given the increasing role of titanium in commercial aircraft, new titanium technologies are needed to create a more sustainable manufacturing strategy that consumes less energy, requires less material, and significantly reduces material and fabrication costs. A number of emerging processes are under development which could lead to a breakthrough in extraction technology. Several of these processes produce titanium alloy powder as a product. The availability of low-cost titanium powders may in turn enable a more efficient approach to the manufacture of titanium components using powder metallurgical processing. The objective of this project was to define energy-efficient strategies for manufacturing large-scale titanium structures using these low-cost powders as the starting material. Strategies include approaches to powder consolidation to achieve fully dense mill products, and joining technologies such as friction and laser welding to combine those mill products into near net shape (NNS) preforms for machining. The near net shape approach reduces material and machining requirements providing for improved affordability of titanium structures. Energy and cost modeling was used to define those approaches that offer the largest energy savings together with the economic benefits needed to drive implementation. Technical feasibility studies were performed to identify the most viable approaches to NNS preform fabrication using basic powder metallurgy mill product forms as the building blocks and advanced joining techniques including fusion and solid state joining to assemble these building blocks into efficient machining performs.

  8. A novel powder metallurgy-based method for the recycling of aluminum adapted to a small island developing state in the

    E-Print Network [OSTI]

    Boyer, Edmond

    1 A novel powder metallurgy-based method for the recycling of aluminum adapted to a small island volume scrap aluminum, the application of the powder metallurgy process is proposed. Its methodology of the advantages of the powder metallurgy process. The properties of the recycled parts make them competitive

  9. Groundwater and surface water supplies in the Williston and Powder River structural basins are necessary for future development in these regions. To help determine

    E-Print Network [OSTI]

    Torgersen, Christian

    #12;i Abstract Groundwater and surface water supplies in the Williston and Powder River structural of streams, and quantify reservoir interaction in the Williston and Powder River structural basins the loss to underlying aquifers was 7790 ft3 /s. Both the Powder River and Williston basins contain gaining

  10. CHARACTERIZATION OF THE NEARBY L/T BINARY BROWN DWARF WISE J104915.57-531906.1 AT 2 pc FROM THE SUN

    SciTech Connect (OSTI)

    Kniazev, A. Y.; Vaisanen, P.; Potter, S. B.; Crawford, S.; Gulbis, A. A. S. [South African Astronomical Observatory, P.O. Box 9, 7935 Observatory, Cape Town (South Africa); Muzic, K.; Mehner, A.; Boffin, H. M. J.; Melo, C.; Ivanov, V. D.; Girard, J.; Mawet, D.; Schmidtobreick, L. [European Southern Observatory, Ave. Alonso de Cordova 3107, Casilla 19001, Santiago 19 (Chile); Kurtev, R.; Borissova, J. [Departamento de Fisica y Astronomia, Universidad de Valparaiso, Av. Gran Bretana 1111, Playa Ancha, 5030 Casilla (Chile); Huelamo, N. [CAB (INTA-CSIC), LAEFF, P.O. Box 78, E-28691 Villanueva de la Canada, Madrid (Spain); Minniti, D. [Departamento Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Av. Vicuna Mackenna 4860, Santiago (Chile); Ishibashi, K. [Nagoya University, Nagoya (Japan); Beletsky, Y. [Las Campanas Observatory, Carnegie Institution of Washington, Colina el Pino, Casilla 601 La Serena (Chile); Buckley, D. A. H. [Southern African Large Telescope Foundation, P.O. Box 9, 7935 Observatory, Cape Town (South Africa); and others

    2013-06-20T23:59:59.000Z

    WISE J104915.57-531906.1 is a L/T brown dwarf binary located 2 pc from the Sun. The pair contains the closest known brown dwarfs and is the third closest known system, stellar or sub-stellar. We report comprehensive follow-up observations of this newly uncovered system. We have determined the spectral types of both components (L8 {+-} 1, for the primary, agreeing with the discovery paper; T1.5 {+-} 2 for the secondary, which was lacking spectroscopic type determination in the discovery paper) and, for the first time, their radial velocities (V{sub rad} {approx} 23.1, 19.5 km s{sup -1}) using optical spectra obtained at the Southern African Large Telescope and other facilities located at the South African Astronomical Observatory (SAAO). The relative radial velocity of the two components is smaller than the range of orbital velocities for theoretically predicted masses, implying that they form a gravitationally bound system. We report resolved near-infrared JHK{sub S} photometry from the Infrared Survey Facility telescope at the SAAO which yields colors consistent with the spectroscopically derived spectral types. The available kinematic and photometric information excludes the possibility that the object belongs to any of the known nearby young moving groups or associations. Simultaneous optical polarimetry observations taken at the SAAO 1.9 m give a non-detection with an upper limit of 0.07%. For the given spectral types and absolute magnitudes, 1 Gyr theoretical models predict masses of 0.04-0.05 M{sub Sun} for the primary, and 0.03-0.05 M{sub Sun} for the secondary.

  11. Corrosion inhibitor storage and release property of TiO{sub 2} nanotube powder synthesized by rapid breakdown anodization method

    SciTech Connect (OSTI)

    Arunchandran, C.; Ramya, S.; George, R.P. [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)] [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Kamachi Mudali, U., E-mail: kamachi@igcar.gov.in [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)

    2013-02-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? TiO{sub 2} nanotube powders were synthesized by rapid breakdown anodization method. ? Benzotriazole was loaded into the TiO{sub 2} nanotube powders. ? Low pH induced release of benzotriazole from TiO{sub 2} nanotube powders was proved. -- Abstract: Titanium dioxide (TiO{sub 2}) is one of the most studied substances in material science due to its versatile properties and diverse applications. In this study titanium dioxide nanotube powder were synthesized by rapid breakdown anodization (RBA) method. The synthesis involved potentiostatic anodization of titanium foil in 0.1 M HClO{sub 4} electrolyte under an applied voltage of 20 V and rapid stirring. The morphology and the phase of titanium dioxide nanotube powder were studied using field emission scanning electron microscopy, laser Raman spectroscopy and high resolution transmission electron microscopy. Benzotriazole was chosen as model inhibitor to evaluate TiO{sub 2} nanotube powder's corrosion inhibitor loading and releasing properties. The storage and release properties of TiO{sub 2} nanotube powder were studied using UV–visible spectroscopy and thermogravimetric analysis.

  12. How to obtain the National Energy Modeling System (NEMS)

    Reports and Publications (EIA)

    2013-01-01T23:59:59.000Z

    The National Energy Modeling System (NEMS) NEMS is used by the modelers at the U. S. Energy Information Administration (EIA) who understand its structure and programming. NEMS has only been used by a few organizations outside of the EIA, because most people that requested NEMS found out that it was too difficult or rigid to use. NEMS is not typically used for state-level analysis and is poorly suited for application to other countries. However, many do obtain the model simply to use the data in its input files or to examine the source code.

  13. Identification of a mutation in the tyrosinase related protein 1 (TRP1) gene associated with brown oculocutaneous albinism (OCA3)

    SciTech Connect (OSTI)

    Wildenberg, S.C.; Oetting, W.S.; Fryer, J.P. [Univ. of Minnesota, Minneapolis, MN (United States)] [and others

    1994-09-01T23:59:59.000Z

    The genes responsible for the two most common types of human oculocutaneous albinism (OCA) have been identified. Mutations of the tyrosinase gene (chromosome 11q14-21) produce OCA1, and mutations of the P gene (chromosome 15q11.2-13) produce OCA2. Another type of OCA known as brown OCA or OCA3 is found commonly in the African and African-American population. OCA3 is characterized by light brown skin and hair with the ocular features of albinism and represents the third most frequent type of OCA. We previously identified dizygotic African-American twin boys who were discordant for OCA3. Melanocytes from the affected twin produced brown melanin and contained no detectable TRP1 protein. We have now characterized the TRP1 gene from the affected twin. The human TRP1 gene, homologous to the murine brown locus, contains 8 exons and maps to chromosome 9p23. Using PCR amplification of each exon coupled with SSCP analysis and direct DNA sequencing, we found the affected twin to homozygous for a single bp deletion in exon 6. The deletion removes a G in codon 368 leading to a premature stop at codon 384. We also identified a Tsp509 polymorphism in the 3{prime} UTR. We conclude that mutations of the TRP1 gene are responsible for brown OCA or OCA3, making this the third major OCA gene identified in humans.

  14. A Herschel PACS survey of brown dwarfs in IC 2391: Limits on primordial and debris disk fractions

    E-Print Network [OSTI]

    Riaz, B

    2014-01-01T23:59:59.000Z

    We present results from a Herschel PACS survey of 8 brown dwarfs in the IC 2391 cluster. Our aim was to determine the brown dwarf disk fraction at ages of ~40-50 Myr. None of the 8 brown dwarfs observed were detected in the PACS 70 or 160mu bands. We have determined the detection limits of our survey using the 1-sigma flux upper limits in the PACS far-infrared and the WISE mid-infrared bands. The sensitivity of our observations would only allow for the detection of debris disks with exceptionally large fractional luminosities (>1%). Considering that only the most extreme and rare debris disks have such high fractional luminosities, it can be hypothesized that Vega-like debris disks, as observed around ~30% of low-mass stars at similar ages, could exist around the targeted IC 2391 brown dwarfs. Most primordial disks similar to the ones observed for the younger 1-10 Myr brown dwarfs would be within the detection sensitivities of our survey, and could have been detected. The non-detection for all targets then su...

  15. Hybrid nuclear reactor grey rod to obtain required reactivity worth

    DOE Patents [OSTI]

    Miller, John V. (Munhall, PA); Carlson, William R. (Scott Township, Allegheny County, PA); Yarbrough, Michael B. (Hempfield Township, Westmoreland County, PA)

    1991-01-01T23:59:59.000Z

    Hybrid nuclear reactor grey rods are described, wherein geometric combinations of relatively weak neutron absorber materials such as stainless steel, zirconium or INCONEL, and relatively strong neutron absorber materials, such as hafnium, silver-indium cadmium and boron carbide, are used to obtain the reactivity worths required to reach zero boron change load follow. One embodiment includes a grey rod which has combinations of weak and strong neutron absorber pellets in a stainless steel cladding. The respective pellets can be of differing heights. A second embodiment includes a grey rod with a relatively thick stainless steel cladding receiving relatively strong neutron absorber pellets only. A third embodiment includes annular relatively weak netron absorber pellets with a smaller diameter pellet of relatively strong absorber material contained within the aperture of each relatively weak absorber pellet. The fourth embodiment includes pellets made of a homogeneous alloy of hafnium and a relatively weak absorber material, with the percentage of hafnium chosen to obtain the desired reactivity worth.

  16. Infrared thermography for laser-based powder bed fusion additive manufacturing processes

    SciTech Connect (OSTI)

    Moylan, Shawn; Whitenton, Eric; Lane, Brandon; Slotwinski, John [National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899 (United States)

    2014-02-18T23:59:59.000Z

    Additive manufacturing (AM) has the potential to revolutionize discrete part manufacturing, but improvements in processing of metallic materials are necessary before AM will see widespread adoption. A better understanding of AM processes, resulting from physics-based modeling as well as direct process metrology, will form the basis for these improvements. Infrared (IR) thermography of AM processes can provide direct process metrology, as well as data necessary for the verification of physics-based models. We review selected works examining how IR thermography was implemented and used in various powder-bed AM processes. This previous work, as well as significant experience at the National Institute of Standards and Technology in temperature measurement and IR thermography for machining processes, shapes our own research in AM process metrology with IR thermography. We discuss our experimental design, as well as plans for future IR measurements of a laser-based powder bed fusion AM process.

  17. Advancements in Ti Alloy Powder Production by Close-Coupled Gas Atomization

    SciTech Connect (OSTI)

    Heidloff, Andy; Rieken, Joel; Anderson, Iver; Byrd, David

    2011-04-01T23:59:59.000Z

    As the technology for titanium metal injection molding (Ti-MIM) becomes more readily available, efficient Ti alloy fine powder production methods are required. An update on a novel close-coupled gas atomization system has been given. Unique features of the melting apparatus are shown to have measurable effects on the efficiency and ability to fully melt within the induction skull melting system (ISM). The means to initiate the melt flow were also found to be dependent on melt apparatus. Starting oxygen contents of atomization feedstock are suggested based on oxygen pick up during the atomization and MIM processes and compared to a new ASTM specification. Forming of titanium by metal injection molding (Ti-MIM) has been extensively studied with regards to binders, particle shape, and size distribution and suitable de-binding methods have been discovered. As a result, the visibility of Ti-MIM has steadily increased as reviews of technology, acceptability, and availability have been released. In addition, new ASTM specification ASTM F2885-11 for Ti-MIM for biomedical implants was released in early 2011. As the general acceptance of Ti-MIM as a viable fabrication route increases, demand for economical production of high quality Ti alloy powder for the preparation of Ti-MIM feedstock correspondingly increases. The production of spherical powders from the liquid state has required extensive pre-processing into different shapes thereby increasing costs. This has prompted examination of Ti-MIM with non-spherical particle shape. These particles are produced by the hydride/de-hydride process and are equi-axed but fragmented and angular which is less than ideal. Current prices for MIM quality titanium powder range from $40-$220/kg. While it is ideal for the MIM process to utilize spherical powders within the size range of 0.5-20 {mu}m, titanium's high affinity for oxygen to date has prohibited the use of this powder size range. In order to meet oxygen requirements the top size cut has traditionally been 45 {mu}m, and in some instances a bottom cut at +5 {mu}m is made to remove ultra-fine particles and reduce oxygen content. Predictably, use of irregular shaped or larger particle feedstock powder can reduce part quality as sintering shrinkage and part detail suffer. Thus, widespread production and technological use of Ti-MIM is limited due in large part to Ti alloy feedstock cost and availability, not MIM processing capability. Lower cost feedstock of fine, spherical Ti alloy powder with sufficient purity must be available in order to fully utilize the advantages of the Ti-MIM processing route allowing expansion of the market to small complex Ti parts in many high volume applications.

  18. Biomimetic synthesis of modified calcium phosphate fine powders and their in vitro studies

    SciTech Connect (OSTI)

    Gergulova, R., E-mail: rumigg@yahoo.com; Tepavitcharova, S., E-mail: rumigg@yahoo.com; Rabadjieva, D., E-mail: rumigg@yahoo.com; Sezanova, K., E-mail: rumigg@yahoo.com; Ilieva, R., E-mail: rumigg@yahoo.com [Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 11, 1113 Sofia (Bulgaria); Alexandrova, R.; Andonova-Lilova, B. [Institute of Experimental Morphology, Pathology and Anthropology with Museum, BAS, Acad. G. Bonchev Str., Bl. 25, Sofia (Bulgaria)

    2013-12-16T23:59:59.000Z

    Biomimetic approach and subsequent high-temperature treatment were used to synthesize ion modified calcium phosphate fine powders. Thus, using Simulated Body Fluid (SBF) as an ion modifier, a bi-phase mixture of ion modified ?-tricalcium phosphate and hydroxyapatite (?-TCP + HA) was prepared. The use of SBF electrolyte solution enriched with Mg{sup 2+} or Zn{sup 2+} yielded monophase ?-tricalcium phosphate additionally modified with Mg{sup 2+} or Zn{sup 2+} (Mg-?-TCP or Zn-?-TCP). The in vitro behavior of the prepared powders on cell viability and proliferation of murine BALB/c 3T3 fibroblasts and of human Lep 3 cells was studied by MTT test assays and Mosmann method after 72 h incubation. The relative cell viability was calculated.

  19. Composition of the wax fraction of bitumen from methylated brown coals

    SciTech Connect (OSTI)

    S.I. Zherebtsov; A.I. Moiseev [Russian Academy of Sciences, Kemerovo (Russian Federation). Institute of Coal and Coal Chemistry

    2009-04-15T23:59:59.000Z

    Changes in the group and individual compositions of the wax fractions of bitumen in the course of brown coal methylation were studied. With the use of IR and NMR spectroscopy and chromatography-mass spectrometry, it was found that the esters of methylated coal waxes consisted of the native esters of fatty acids and the methyl esters of these acids formed as a result of an alkylation treatment. Esterification and transesterification were predominant among the reactions of aliphatic fraction components. A positive effect of methanol alkylation on an increase in the yield of the aliphatic fractions was found.

  20. SciTech Connect: Brown Grease to Biodiesel Demonstration Project Report

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systems controllerAdditiveBetatron Radiation from aBrown Grease to