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


1

Niagara Limestone  

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

Niagara Limestone Niagara Limestone Nature Bulletin No. 282-A November 11, 1967 Forest Preserve District of Cook County Richard B. Ogilvie, President Roland F. Eisenbeis, Supt. of Conservation NIAGARA LIMESTONE Chicago stands at the crossroads of America -- the heart of the Middle West -- and one of the most important natural resources upon which it depends is the Niagara limestone beneath it. The bedrock in this region consists of layer upon layer of limestones, shales and sandstones stacked almost a half mile thick on top of the ancient granite, once molten, that formed the original surface of the earth before oceans formed and life appeared. The Niagara limestone is the uppermost layer here but few of us are aware of it because it is covered with soil and ground up rock -- glacial drift -- ranging from a few feet to a hundred or more feet in depth.

2

Preparing limestone for burning  

Science Journals Connector (OSTI)

Classification of limestone before burning can be done by the screening method ... enables us to use the heat of the waste gases from the calcination units.

V. I. Goncharov; T. P. Kirichenko

3

Highly Soluble Alkoxide Magnesium Salts for Rechargeable Magnesium Batteries  

SciTech Connect

A unique class of air-stable and non-pyrophoric magnesium electrolytes has been developed based on alkoxide magnesium compounds. The crystals obtained from this class of electrolytes exhibit a unique structure of tri-magnesium cluster, [Mg3Cl3(OR)2(THF)6]+ [(THF)MgCl3] . High reversible capacities and good rate capabilities were obtained in Mg-Mo6S8 batteries using these new electrolytes at both 20 and 50 oC.

Liao, Chen [ORNL] [ORNL; Guo, Bingkun [ORNL] [ORNL; Jiang, Deen [ORNL] [ORNL; Custelcean, Radu [ORNL] [ORNL; Mahurin, Shannon Mark [ORNL] [ORNL; Sun, Xiao-Guang [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

4

Cellulose-Bound Magnesium Diboride Superconductivity  

E-Print Network (OSTI)

Cellulose-Bound Magnesium Diboride Superconductivity Y.L. Lin and M.O. Pekguleryuz Department Canada Abstract--Two-phase superconductor tapes were produced by blending high purity magnesium diboride junctions. I. INTRODUCTION Magnesium diboride was found to be superconducting in 2001 by Nagamatsu et al. [1

Ryan, Dominic

5

Reversible Dehydrogenation of Magnesium Borohydride to Magnesium...  

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

Reversible Dehydrogenation of Magnesium Borohydride to Magnesium Triborane in the Solid State Under Moderate Conditions. Reversible Dehydrogenation of Magnesium Borohydride to...

6

Production of magnesium metal  

SciTech Connect

A process of producing magnesium metal includes providing magnesium carbonate, and reacting the magnesium carbonate to produce a magnesium-containing compound and carbon dioxide. The magnesium-containing compound is reacted to produce magnesium metal. The carbon dioxide is used as a reactant in a second process. In another embodiment of the process, a magnesium silicate is reacted with a caustic material to produce magnesium hydroxide. The magnesium hydroxide is reacted with a source of carbon dioxide to produce magnesium carbonate. The magnesium carbonate is reacted to produce a magnesium-containing compound and carbon dioxide. The magnesium-containing compound is reacted to produce magnesium metal. The invention further relates to a process for production of magnesium metal or a magnesium compound where an external source of carbon dioxide is not used in any of the reactions of the process. The invention also relates to the magnesium metal produced by the processes described herein.

Blencoe, James G. (Harriman, TN) [Harriman, TN; Anovitz, Lawrence M. (Knoxville, TN) [Knoxville, TN; Palmer, Donald A. (Oliver Springs, TN) [Oliver Springs, TN; Beard, James S. (Martinsville, VA) [Martinsville, VA

2010-02-23T23:59:59.000Z

7

Kinematic hardening of a porous limestone  

Science Journals Connector (OSTI)

A concept for a kinematic hardening yield surface in stress space for Cordova Cream limestone (Austin Chalk) developed by Celle and Cheatham (1981) has been improved using Ziegler's modification of Prager's ha...

J. B. Cheatham Jr.; M. B. Allen; C. C. Celle

8

Blood Serum Magnesium  

E-Print Network (OSTI)

Key Words · Blood Serum · Magnesium · Flame · Atomic Absorption Method Guide: 40162 Atomic, and magnesium is determined by flame atomic absorption spectrometry using an air-acetylene flame. Lanthanum Absorption Method Guide Mg in Blood Serum Principle The sample is diluted 1:100 with deionised water

Wells, Mathew G. - Department of Physical and Environmental Sciences, University of Toronto

9

Constraining magnesium cycling in marine sediments using magnesium isotopes  

E-Print Network (OSTI)

Constraining magnesium cycling in marine sediments using magnesium isotopes J.A. Higgins *, D Abstract Magnesium concentrations in deep-sea sediment pore-fluids typically decrease down core due to net and differentiate these processes, we have measured magnesium isotopes in pore-fluids and sediment samples from

Paytan, Adina

10

Limestone, Oklahoma: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Limestone, Oklahoma: Energy Resources Limestone, Oklahoma: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 36.3159295°, -95.7491501° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":36.3159295,"lon":-95.7491501,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

Method for production of magnesium  

DOE Patents (OSTI)

A continuous process for the production of elemental magnesium is described. Magnesium is made from magnesium oxide and a light hydrocarbon gas. In the process, a feed stream of the magnesium oxide and gas is continuously fed into a reaction zone. There the magnesium oxide and gas are reacted at a temperature of about 1400.degree. C. or greater in the reaction zone to provide a continuous product stream of reaction products, which include elemental magnesium. The product stream is continuously quenched after leaving the reaction zone, and the elemental magnesium is separated from other reaction products.

Diaz, Alexander F. (Cambridge, MA); Howard, Jack B. (Winchester, MA); Modestino, Anthony J. (Hanson, MA); Peters, William A. (Lexington, MA)

1998-01-01T23:59:59.000Z

12

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

Office of Scientific and Technical Information (OSTI)

Industry Associations International Magnesium Association Founded in 1943, the mission of the International Magnesium Association (IMA) is to promote the use of the metal magnesium...

13

Electrodeposition of magnesium and magnesium/aluminum alloys  

DOE Patents (OSTI)

Electrolytes and plating solutions for use in processes for electroplating and electroforming pure magnesium and alloys of aluminum and magnesium and also electrodeposition processes. An electrolyte of this invention is comprised of an alkali metal fluoride or a quaternary ammonium halide, dimethyl magnesium and/or diethyl magnesium, and triethyl aluminum and/or triisobutyl aluminum. An electrolyte may be dissolved in an aromatic hydrocarbon solvent to form a plating solution. The proportions of the component compounds in the electrolyte are varied to produce essentially pure magnesium or magnesium/aluminum alloys having varying selected compositions.

Mayer, A.

1988-01-21T23:59:59.000Z

14

Electrodeposition of magnesium and magnesium/aluminum alloys  

DOE Patents (OSTI)

Electrolytes and plating solutions for use in processes for electroplating and electroforming pure magnesium and alloys of aluminum and magnesium and also electrodeposition processes. An electrolyte of this invention is comprised of an alkali metal fluoride or a quaternary ammonium halide, dimethyl magnesium and/or diethyl magnesium, and triethyl aluminum and/or triisobutyl aluminum. An electrolyte may be dissolved in an aromatic hydrocarbon solvent to form a plating solution. The proportions of the component compounds in the electrolyte are varied to produce essentially pure magnesium or magnesium/aluminum alloys having varying selected compositions.

Mayer, Anton (Los Alamos, NM)

1988-01-01T23:59:59.000Z

15

Magnesium for Future Autos  

SciTech Connect

In the quest for better fuel economy and improved environmental performance, magnesium may well become a metal of choice for constructing lighter, more efficient vehicles. Magnesium is the lightest structural metal, yet it has a high strength-to-weight ratio makes it comparable to steel in many applications. The worlds automakers already use magnesium for individual components. But new alloys and processing methods are needed before the metal can become economically and technologically feasible as a major automotive structural material. This article will explore the formation, challenges and initial results of an international collaborationthe Magnesium Front End Research and Development (MFERD) projectthat is leveraging the expertise and resources of Canada, China and the United States to advance the creation of magnesium-intensive vehicles. The MFERD project aims to develop the enabling technologies and knowledge base that will lead to a vehicles that are 50-60 percent lighter, equally affordable, more recyclable and of equal or better quality when compared to todays vehicles. Databases of information also will be captured in models to enable further alloy and manufacturing process optimization. Finally, a life-cycle analysis of the magnesium used will be conducted.

Nyberg, Eric A.; Luo, Alan A.; Sadayappan, Kumar; Shi, Wenfang

2008-10-01T23:59:59.000Z

16

Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane...  

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

Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane Monoammoniate. Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane Monoammoniate. Abstract:...

17

Product development of FGD recovered magnesium hydroxide  

SciTech Connect

The ThioClear FGD processes developed by the Dravo Lime Company (DLC) produce a high brightness gypsum and magnesium hydroxide (Mg(OH){sub 2}) by-product. Both originate as white precipitates from a solution of magnesium sulfate. The use of magnesium-enhanced lime avoids the mineral impurities from direct neutralization when using pulverized limestone rock. White, pure FGD synthetic gypsum can be used to produce higher value products such as mineral fillers and industrial plasters. This paper focuses on the product development of the Mg(OH){sub 2} by-product. Commercial Mg(OH){sub 2} sells at over $200/Ton for a variety of uses, most of which is wastewater treatment and a feedstock to make magnesium chemicals and refractories. Beneficial uses in the power plant are pH control of acidic coal pile stormwater runoff and bottom ash quench water. A future use being explored is injection into coal fired boilers to neutralize sulfur trioxide (SO{sub 3}) to prevent stack gas opacity related emission problems and minimize air preheater corrosion and fouling. The objective of this project is to improve the purity and solids content of the by-product after it is separated from the gypsum. Several options were investigated to convert it into a more marketable or usable form. Test results and economic evaluations are reported during the different process steps needed to improve the product quality: (1) dissolving or washing out the gypsum impurity; (2) thickening the washed solids and using the overflow for makeup water within the FGD water balance; (3) finding the best means to dewater the washed, thickened slurry; and (4) repulp the dewatered cake into a stabilized slurry or dry it to powder. Flash drying the dewatered cake is compared to spray drying the thickened slurry. FGD Mg(OH){sub 2} is shown to have equal reactivity as an acid neutralization reagent on a Mg(OH){sub 2} molar basis to commercial Mg(OH){sub 2} products and other alkaline reagents. Its use for pH control in wastewater treatment is shown to produce a much smaller sludge volume than lime or sodium hydroxide.

Beeghly, J.H.; Babu, M.; Smith, K.J.

1999-07-01T23:59:59.000Z

18

Mathematical Modeling on Open Limestone Channel  

E-Print Network (OSTI)

Acid mine drainage (AMD) is the outflow of acidic water from metal mines or coal mines. When exposed to air and water, metal sulfides from the deposits of the mines are oxidized and produce acid, metal ions and sulfate, which lower the pH value of the water. An open limestone channel (OLC) is a passive and low cost way to neutralize AMD. The dissolution of calcium into the water increases the pH value of the solution. A differential equation model is numerically solved to predict the variation of concentration of each species in the OLC solution. The diffusion of Calcium due to iron precipitates is modeled by a linear equation. The results give the variation of pH value and the concentration of Calcium.

Bandstra, Joel; Wu, Naiyi

2014-01-01T23:59:59.000Z

19

Magnesium Research and Technology Development  

SciTech Connect

The Magnesium Research and Technical Development (MR&TD) project supports efforts to increase using magnesium in automotive applications, including improving technology, lowering costs and increasing the knowledge needed to enable alloy and manufacturing process optimization. MR&TD supports the U.S. Department of Energy (DOE)/United States Automotive Materials Partnership (USAMP) Magnesium Front End Research and Development (MFERD) project in collaboration with China and Canada. The MR&TD projects also maintains the magnesium bibliographic database at magnesium.pnl.gov.

Nyberg, Eric A.; Joost, William; Smith, Mark T.

2009-12-30T23:59:59.000Z

20

Magnesium fluoride recovery method  

DOE Patents (OSTI)

A method of obtaining magnesium fluoride substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is contacted with an acid under certain prescribed conditions to produce a liquid product and a particulate solid product. The particulate solid product is separated from the liquid and treated at least two more times with acid to produce a solid residue consisting essentially of magnesium fluoride substantially free of uranium and having a residual radioactivity level of less than about 1000 pCi/gm. In accordance with a particularly preferred embodiment of the invention a catalyst and an oxidizing agent are used during the acid treatment and preferably the acid is sulfuric acid having a strength of about 1.0 Normal.

Gay, Richard L. (Canoga Park, CA); McKenzie, Donald E. (Woodland Hills, CA)

1989-01-01T23:59:59.000Z

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


21

Magnesium Projects | Department of Energy  

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

Projects Magnesium Projects 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C....

22

Hydrogen in magnesium palladium thin layer structures.  

E-Print Network (OSTI)

??In this thesis, the study of hydrogen storage, absorption and desorption in magnesium layers is described. The magnesium layers have a thickness of 50-500 nm (more)

Kruijtzer, G.L.

2008-01-01T23:59:59.000Z

23

Modelling of magnesium metabolism in dairy cattle.  

E-Print Network (OSTI)

??A model of magnesium metabolism in dairy cattle has been developed by adapting and improving an earlier model of magnesium metabolism in sheep. The model (more)

Bell, S. T.

2006-01-01T23:59:59.000Z

24

HIGH INTEGRITY MAGNESIUM AUTOMOTIVE COMPONENTS (HIMAC) | Department...  

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

HIGH INTEGRITY MAGNESIUM AUTOMOTIVE COMPONENTS (HIMAC) HIGH INTEGRITY MAGNESIUM AUTOMOTIVE COMPONENTS (HIMAC) 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual...

25

Coordination Chemistry in magnesium battery electrolytes: how...  

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

Chemistry in magnesium battery electrolytes: how ligands affect their performance. Coordination Chemistry in magnesium battery electrolytes: how ligands affect their performance....

26

It's Elemental - The Element Magnesium  

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

Sodium Sodium Previous Element (Sodium) The Periodic Table of Elements Next Element (Aluminum) Aluminum The Element Magnesium [Click for Isotope Data] 12 Mg Magnesium 24.3050 Atomic Number: 12 Atomic Weight: 24.3050 Melting Point: 923 K (650°C or 1202°F) Boiling Point: 1363 K (1090°C or 1994°F) Density: 1.74 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 3 Group Number: 2 Group Name: Alkaline Earth Metal What's in a name? For Magnesia, a district in the region of Thessaly, Greece. Say what? Magnesium is pronounced as mag-NEE-zhi-em. History and Uses: Although it is the eighth most abundant element in the universe and the seventh most abundant element in the earth's crust, magnesium is never found free in nature. Magnesium was first isolated by Sir Humphry Davy, an

27

Limestone and Ash Storage Silos and Lime Preparation Equipment, Part  

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

Limestone and Ash Storage Silos and Lime Preparation Equipment, Part Limestone and Ash Storage Silos and Lime Preparation Equipment, Part of the System to Inject Limestone Sorbent for SO, Control. Nucla, CO Nucla...continued Before being repowered, the plant consisted of three 12 MWe coal stoker- fired units built in 1959, which were taken out of service in 1984 due to low efficiency and high fuel cost. Antici- pating a need for additional power in the early 1990s. and after review of many power generation alternatives, CUEA started constmction of the re- powered Nucla CFB plant in Novem- ber 1984 and completed the project in May 1987. The original boilers were replaced with a new Fympower Corp. CFB bailer, a new high pressure 74 MWe steam turbine generator was installed, the three original 12 MWe steam turbines were

28

Biofortifying Brassica with calcium (Ca) and magnesium (Mg)  

E-Print Network (OSTI)

zinc, copper, calcium, magnesium, selenium and iodine. NewE. 2008. Role of dietary magnesium in cardiovascular diseaseShoot calcium (Ca) and magnesium (Mg) concentrations differ

2009-01-01T23:59:59.000Z

29

Curie temperature analyses of Upper Jurassic and Lower Cretaceous pelagic limestones  

Science Journals Connector (OSTI)

......strongly ferromagnetic minerals, IRM acquisition and...weakly ferromagnetic minerals such as goethite and...thermomagnetic analysis, pelagic lime- stones 1 Introduction...magnetite, other magnetic minerals including haematite...sandy limestone gray-green marly limestone "Ammonitico......

Bruno Galbrun; Robert F. Butler

1986-09-01T23:59:59.000Z

30

Serum magnesium level and magnesium supplementation on Type 2 Diabetes Mellitus: systematic review.  

E-Print Network (OSTI)

??Objective: To assess the association between serum magnesium levels and risk of type 2 diabetes and to evaluate the effect of magnesium supplementation on diabetes (more)

Sefealem, Assefa Belay

2011-01-01T23:59:59.000Z

31

LABORATORY INVESTIGATIONS IN SUPPORT OF CARBON DIOXIDE-LIMESTONE SEQUESTRATION IN THE OCEAN  

SciTech Connect

In the second half of the second contractual year the construction of the High Pressure Flow Reactor (HPFR) was completed, tested, and satisfactory results have been obtained. The major component of the HPFR is a Kenics-type static mixer in which two fluids are thoroughly mixed. In our case the two fluids are liquid or supercritical CO{sub 2} and a slurry of pulverized limestone (CaCO{sub 3}) in pure or artificial seawater. The outflow from the static mixer is an emulsion consisting of CO{sub 2} droplets coated with a sheath of CaCO{sub 3} particles dispersed in water. The coated CO{sub 2} droplets are called globules, and the emulsion is called globulsion. By adjusting the proportions of the two fluids, carbon dioxide and water, the length and pressure drop across the static mixer, globules with a fairly uniform distribution of diameters can be obtained. By using different particle sizes of CaCO{sub 3}, globules can be obtained that are lighter or heavier than water, thus floating or sinking in a water column. The globulsion ensuing from the static mixer flows into a high pressure cell with windows, where the properties of the globules can be observed, such as their diameter and settling velocity. Using the Stokes' equation, the specific gravity of the globules can be determined. Also, a second generation High Pressure Batch Reactor (HPBR) was constructed. This reactor allows better mixing of the ingredients, more accurate temperature and pressure control, better illumination and video camera observations. In this reactor we established that CO{sub 2}-in-water globulsions can be formed stabilized by other particles than pulverized limestone. So far, we used flyash obtained from a local coal-fired power plant, and a pulverized magnesium silicate mineral, lizardite, Mg{sub 3}Si{sub 2}O{sub 5}(OH){sub 4}, obtained from DOE's Albany Research Laboratory. In the reporting period we conducted joint experiments in NETL's high pressure water tunnel facility. Thanks to the longer travel path of the globules, and the excellent optical instrumentation available at NETL, we were able to more accurately obtain globule diameters and settling velocities.

Dan Golomb; Eugene Barry; David Ryan; Carl Lawton; Peter Swett; John Hannon; Huishan Duan

2004-09-01T23:59:59.000Z

32

Magnesium outdiffusion through magnetite films grown on magnesium oxide (001) (abstract)  

E-Print Network (OSTI)

Magnesium outdiffusion through magnetite films grown on magnesium oxide (001) (abstract) K. A. Shaw of magnesium in the uppermost layers of the film, and indicate a concentration gradient, with the highest concentrations of magnesium in the surface layer. X-ray fluorescence in scanning electron microscopy

Diebold, Ulrike

33

Promising Magnesium Battery Research at ALS  

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

Promising Magnesium Battery Research at ALS Promising Magnesium Battery Research at ALS Print Wednesday, 23 January 2013 16:59 toyota battery a) Cross-section of the in situ...

34

Final Report on the Safety Assessment of Aluminum Silicate, Calcium Silicate, Magnesium Aluminum  

E-Print Network (OSTI)

Final Report on the Safety Assessment of Aluminum Silicate, Calcium Silicate, Magnesium Aluminum Silicate, Magnesium Silicate, Magnesium Trisilicate, Sodium Magnesium Silicate, Zirconium Silicate, Attapulgite, Bentonite, Fuller's Earth, Hectorite, Kaolin, Lithium Magnesium Silicate, Lithium Magnesium

Ahmad, Sajjad

35

Climate VISION: Private Sector Initiatives: Magnesium  

Office of Scientific and Technical Information (OSTI)

Letters of Intent/Agreements Letters of Intent/Agreements International Magnesium Association Logo In response to President Bush's challenge to reduce greenhouse gas emissions, fifteen U.S. companies along with the International Magnesium Association (IMA) have voluntarily committed to eliminate SF6 emissions by 2010. This commitment builds on the efforts of the SF6 Emission Reduction Partnership for the Magnesium Industry, a partnership program that EPA has had with the industry since 1999. These industry leaders represent 100% of domestic primary magnesium production and 90% of U.S. magnesium casting capacity. In addition, the IMA's members operate on five continents and represent 80% of the global magnesium industry. The magnesium industry commonly uses a potent and long-lived greenhouse

36

A SEARCH FOR MAGNESIUM IN EUROPA'S ATMOSPHERE  

SciTech Connect

Europa's tenuous atmosphere results from sputtering of the surface. The trace element composition of its atmosphere is therefore related to the composition of Europa's surface. Magnesium salts are often invoked to explain Galileo Near Infrared Mapping Spectrometer spectra of Europa's surface, thus magnesium may be present in Europa's atmosphere. We have searched for magnesium emission in the Hubble Space Telescope Faint Object Spectrograph archival spectra of Europa's atmosphere. Magnesium was not detected and we calculate an upper limit on the magnesium column abundance. This upper limit indicates that either Europa's surface is depleted in magnesium relative to sodium and potassium, or magnesium is not sputtered as efficiently resulting in a relative depletion in its atmosphere.

Hoerst, S. M. [Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO (United States); Brown, M. E., E-mail: sarah.horst@colorado.edu [Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA (United States)

2013-02-20T23:59:59.000Z

37

The origin of brucite in hydrothermally altered limestone near Devil Peak, Nevada.  

E-Print Network (OSTI)

??Open-space brucite was identified in veins crosscutting hydrothermally altered limestone near the Devil Peak rhyolite plug in southern Nevada. The brucite occurs with serpentine, calcite, (more)

Knupp, Rhonda L.

1999-01-01T23:59:59.000Z

38

Protective effect of endolithic fungal hyphae on oolitic limestone buildings Nicolas Concha-Lozano a  

E-Print Network (OSTI)

limestone from four quarries and eight monuments exposed on various environmental conditions focusing molding. Study of weathering forms on old quarries indicates that lichens colonization (Verrucaria

Boyer, Edmond

39

Reservoir Characterization and Enhanced Oil Recovery Potential in Middle Devonian Dundee Limestone Reservoirs, Michigan Basin, USA.  

E-Print Network (OSTI)

?? Middle Devonian Rogers City and subjacent Dundee Limestone formations have combined oil production in excess of 375 MMBO. In general, hydrocarbon production occurs in (more)

Abduslam, Abrahim

2012-01-01T23:59:59.000Z

40

Mercury Control Demonstration Projects Cover Photos: * Top: Limestone Power Plant  

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

6 FEBRUARY 2008 6 FEBRUARY 2008 Mercury Control Demonstration Projects Cover Photos: * Top: Limestone Power Plant * Bottom left: AES Greenidge Power Plant * Bottom right: Presque Isle Power Plant A report on three projects conducted under separate cooperative agreements between the U.S. Department of Energy and: * Consol Energy * Pegasus Technologies * We Energies  Mercury Control Demonstration Projects Executive Summary ............................................................................ 4 Background ......................................................................................... 5 Mercury Removal Projects ................................................................ 7 TOXECON(tm) Retrofit For Mercury and Multi-Pollutant Control on Three 90-MW Coal-Fired Boilers ........................................7

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


41

Substrate and method for the formation of continuous magnesium diboride and doped magnesium diboride wire  

DOE Patents (OSTI)

A chemically doped boron coating is applied by chemical vapor deposition to a silicon carbide fiber and the coated fiber then is exposed to magnesium vapor to convert the doped boron to doped magnesium diboride and a resultant superconductor.

Suplinskas, Raymond J. (Haverhill, MA); Finnemore, Douglas (Ames, IA); Bud'ko, Serquei (Ames, IA); Canfield, Paul (Ames, IA)

2007-11-13T23:59:59.000Z

42

Method for magnesium sulfate recovery  

DOE Patents (OSTI)

A method of obtaining magnesium sulfate substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is then contacted with a concentrated sulfuric acid under certain prescribed conditions to produce a liquid product and a solid product. The particulate solid product and a minor amount of the liquid is then treated to produce a solid residue consisting essentially of magnesium sulfate substantially free of uranium and having a residual radioactivity level of less than 1000 pCi/gm. In accordance with the preferred embodiment of the invention, a catalyst and an oxidizing agent are used during the initial acid treatment and a final solid residue has a radioactivity level of less than about 50 pCi/gm.

Gay, Richard L. (Canoga Park, CA); Grantham, LeRoy F. (Calabasas, CA)

1987-01-01T23:59:59.000Z

43

Promising Magnesium Battery Research at ALS  

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

Promising Magnesium Battery Research Promising Magnesium Battery Research at ALS Promising Magnesium Battery Research at ALS Print Wednesday, 23 January 2013 16:59 toyota battery a) Cross-section of the in situ electrochemical/XAS cell with annotations. b) Drawing and c) photograph of the assembled cell. Alternatives to the current lithium-ion-based car batteries are at the forefront of the automotive industry's research agenda-manufacturers want to build cars with longer battery life, and to do that they're going to have to find new solutions. One promising battery material is magnesium (Mg)-it is more dense than lithium, it is safer, and the magnesium ion carries a two-electron charge, giving it potential as a more efficient energy source. Magnesium has a high volumetric capacity, which could mean

44

Magnesium Isotope Effects in Enzymatic Phosphorylation  

Science Journals Connector (OSTI)

So far as magnesium isotope effect in phosphorylation is an unexpected and unusual phenomenon, it is worthy to shortly describe materials and technologies used in isotopic biochemical experiments. ... Isotope-containing MgCl2 samples were obtained using treatment of magnesium oxides 24MgO, 25MgO, 26MgO, and *MgO with analytically pure HCl (*Mg means magnesium with natural abundance of the three isotopes; see Table 1). ...

Anatoly L. Buchachenko; Dmitry A. Kouznetsov; Natalia N. Breslavskaya; Marina A. Orlova

2008-02-05T23:59:59.000Z

45

Laser Brazing of Magnesium to Steel Sheet.  

E-Print Network (OSTI)

??The ability to effectively join magnesium alloys to steel will facilitate increased application and use of Mg alloys in the automotive and aerospace industries where (more)

Nasiri, Ali Mohamad

2013-01-01T23:59:59.000Z

46

Precipitation of petroleum sulfonates by magnesium ions  

SciTech Connect

The precipitation of petroleum sulfonates was accomplished by the addition of magnesium ions. The magnesium tolerance, defined as the total magnesium concentration at which 5% of the total sulfonate was precipitated, was determined in aqueous solution for 20 commercial petroleum sulfonates. The magnesium tolerances ranged from essentially zero up to 2300 ppM of magnesium. The level of magnesium tolerated increases as the average equivalent weight of the sulfonate decreases. The precipitate formed during the reaction includes a high percentage of sodium sulfonate as well as magnesium sulfonate. All of the samples were prepared to contain 3% active sulfonate, and the reaction temperature was 30/sup 0/C. The precipitate was removed by centrifuging and filtering. The amount of unreacted sulfonate remaining in the filtrate was determined indirectly by measuring the magnesium and sodium remaining in the filtrate. The viscosities of the filtrates were found to change as the amount of magnesium added was increased. The viscosity goes through at least one maximum before rapid precipitation of sulfonate occurs. 5 figures, 2 tables.

French, T.R.; Collins, A.G.

1980-05-01T23:59:59.000Z

47

Structural Cast Magnesium Development (SCMD) AMD 111  

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

* Redesign an existing aluminum engine cradle to magnesium for the 2006 Corvette ZO6 vehicle at no cost penalty and no changes to vehicle build cradle installation sequence. *...

48

Climate VISION: Private Sector Initiatives: Magnesium: Results  

Office of Scientific and Technical Information (OSTI)

website and on the SF6 Emission Reduction Partnership for the Magnesium Industry website. Please check back on this website and the Energy Information Agency website for updates...

49

Magnesium Research in the Automotive Lightweighting Materials...  

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

in the Automotive Lightweighting Materials Program Magnesium Research in the Automotive Lightweighting Materials Program Presentation from the U.S. DOE Office of Vehicle...

50

MAGNESIUM-TITANIUM ALLOYS FOR BIOMEDICAL APPLICATIONS.  

E-Print Network (OSTI)

??Magnesium has been identified as a promising biodegradable implant material because it does not cause systemic toxicity and can reduce stress shielding. However, it corrodes (more)

Hoffmann, Ilona

2014-01-01T23:59:59.000Z

51

Hydrochemical Impacts of Limestone Rock Mining Ghinwa M. Naja & Rosanna Rivero &  

E-Print Network (OSTI)

. 2002). Even though the environmental impacts of ore and coal mining have been adequately investigated, the impact of limestone rock mining has not been well studied. Water Air Soil Pollut DOI 10.1007/s11270-mail: mnaja@evergladesfoundation.org #12;Quarrying of limestone aggregate currently repre- sents in the USA

Demers, Nora Egan

52

Autonomous Remote Crack Displacement Monitoring of a Residence Near a Limestone  

E-Print Network (OSTI)

Autonomous Remote Crack Displacement Monitoring of a Residence Near a Limestone Quarry, Naples a limestone quarry. The object is to quantitatively compare crack re- sponse to blast-induced ground motion for construction and raw materials. For instance, neighbors of road aggregate quarries often perceive

53

Magnesium behavior and structural defects in Mg+ ion implanted...  

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

Magnesium behavior and structural defects in Mg+ ion implanted silicon carbide. Magnesium behavior and structural defects in Mg+ ion implanted silicon carbide. Abstract: As a...

54

Magnesium Replacement of Aluminum Cast Components in a Production...  

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

Magnesium Replacement of Aluminum Cast Components in a Production V6 Engine to Effect Cost-Effective Mass Reduction Magnesium Replacement of Aluminum Cast Components in a...

55

Degradation mechanism and surface modification of biomedical magnesium alloy.  

E-Print Network (OSTI)

???The degradability of magnesium and magnesium alloys in a physiological environment makes them desirable biodegradable biomaterials in many applications. However, their fast degradation rates in (more)

Xin, Yunchang (???)

2010-01-01T23:59:59.000Z

56

Local environment and composition of magnesium gallium layered...  

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

Local environment and composition of magnesium gallium layered double hydroxides determined from solid-state 1H and 71Ga NMR Local environment and composition of magnesium gallium...

57

Scale-Up of Magnesium Production by Fully Stabilized Zirconia...  

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

Scale-Up of Magnesium Production by Fully Stabilized Zirconia Electrolysis Scale-Up of Magnesium Production by Fully Stabilized Zirconia Electrolysis 2012 DOE Hydrogen and Fuel...

58

Magnesium Front End Development (AMD 603/604/904) | Department...  

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

Magnesium Front End Development (AMD 603604904) Magnesium Front End Development (AMD 603604904) 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program...

59

Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up...  

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

Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up Research and Engineering for Light-Weight Vehicles Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up...

60

Alloys as Anode Materials in Magnesium Ion Batteries.  

E-Print Network (OSTI)

?? This thesis is a feasibility study of the possible application of magnesium alloys forfuture magnesium-ion batteries. It investigates dierent alloys and characterizesthem with respect (more)

Syvertsen, Alf Petter

2012-01-01T23:59:59.000Z

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


61

Climate VISION: Private Sector Initiatives: Magnesium: Work Plans  

Office of Scientific and Technical Information (OSTI)

Work Plans EPA's SF6 Emission Reduction Partnership for the Magnesium Industry in cooperation with the International Magnesium Association has developed a work plan for achieving...

62

Magnesium energy cycle system for the power product  

Science Journals Connector (OSTI)

The energy storage of solar radiation with magnesium as an energy reservoir is proposed for renewable energy cycle. Magnesium reaction with water generating hydrogen and residual...

Sakurai, Yasutaka; Yabe, Takashi; Ikuta, Kazunari; Ishioka, Manabu; Ogata, Yoichi; Sato, Yuji

2007-01-01T23:59:59.000Z

63

The TMS Magnesium Committee: Committed to the Advancement of Global Magnesium Technology  

SciTech Connect

The TMS Magnesium Committee was established in the year 2000 as a spin-off of the Reactive Metals Committee, triggered by the strong global growth of magnesium being used in a variety of structural lightweight applications since the mid-1990s. Since then the committee has seen a distinct development in terms of size, participation and focus. The article at hand outlines this development by recapitulating the output of its two main activities: the annual Magnesium Technology Symposia and the JOM Special Issues dedicated to magnesium research and development. Further records on the Magnesium Committee are available from the committee homepage (accessible through http://members.tms.org).

Sillekens, Wim H.; Nyberg, Eric A.

2011-04-21T23:59:59.000Z

64

Metallic bonding in magnesium microclusters  

Science Journals Connector (OSTI)

We investigate the size evolution of bonding in magnesium clusters Mgn, with n?20. Computations are performed in the density-functional scheme with two prescriptions for the exchange-correlation energy: the local-density approximation (LDA), and an improved scheme including gradient corrections (GC). The LDA results show that Mg10 clusters already have acquired several of the characteristic features of metallic aggregates. GC significantly decrease the cohesive energies, and predict a slower convergence with n to the bulk, without changing, however, the qualitative picture given by LDA.

P. Delaly; P. Ballone; J. Buttet

1992-02-15T23:59:59.000Z

65

METHODS FOR THE MICROFABRICATION OF MAGNESIUM Melissa Tsang1  

E-Print Network (OSTI)

was investigated. Boutry et al. fabricated magnesium-based RLC resonators using electric discharge machining (EDM

66

REVIEW ARTICLE A review on magnesium alloys as biodegradable materials  

E-Print Network (OSTI)

REVIEW ARTICLE A review on magnesium alloys as biodegradable materials Xue-Nan GU, Yu-Feng ZHENG 100871, China © Higher Education Press and Springer-Verlag Berlin Heidelberg 2010 Abstract Magnesium of biomedical magnesium alloys is based on the industrial magnesium alloys system, and another is the self

Zheng, Yufeng

67

Ethanol Conversion on Cyclic (MO3)3 (M = Mo, W) Clusters. | EMSL  

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

Conversion on Cyclic (MO3)3 (M Mo, W) Clusters. Ethanol Conversion on Cyclic (MO3)3 (M Mo, W) Clusters. Abstract: Oxides of molybdenum and tungsten are an important class of...

68

Magnesium-Isotope Fractionation During Plant Growth  

Science Journals Connector (OSTI)

With three stable isotopes naturally abundant (24Mg, 78.992%; 25Mg, 10.003%; 26Mg, 11.005%), magnesium stable isotope fractionation may provide insights into these cycles. ... Measurements of the magnesium isotopic composition of chlorophylls, seeds, shoots, roots, leaves, exudates, and the limiting nutrient solution over time show that the plant appears to establish an isotopic equilibrium with the nutrient available to it and that the plant (in particular, the seeds and exudates) becomes enriched in the heavy isotopes of magnesium in a mass-dependent relationship as the plant reaches maturity. ...

Jay R. Black; Emanuel Epstein; William D. Rains; Qing-zhu Yin; William H. Casey

2008-10-01T23:59:59.000Z

69

Evaluating the In Vitro Corrosion Behavior and Cytotoxicity of Vapor Deposited Magnesium Alloys.  

E-Print Network (OSTI)

??Magnesium alloys are emerging as a promising class of bioabsorbable implant materials due to magnesiums biocompatibility and propensity for corrosion. These alloys are useful for (more)

Petrilli, John

2009-01-01T23:59:59.000Z

70

Controlling the Biodegradation of Magnesium Implants Through Nanostructured Calcium-Phosphate Coating  

E-Print Network (OSTI)

phosphate coating on magnesium alloy for modification ofof calcium-containing magnesium alloys in modified-simulatedMazaki N. Surface reaction of magnesium in Hanks solutions.

Iskandar, Maria Emil

2012-01-01T23:59:59.000Z

71

The Effect of Processing Parameters on the Thermoelectric Properties of Magnesium Silicide  

E-Print Network (OSTI)

bulk nanostructured magnesium silicide (Mg2Si) compounds,physical metallurgy of magnesium and its alloys. Pergamonthe Thermoelectric Properties of Magnesium Silicide A Thesis

Fong, Anthony

2012-01-01T23:59:59.000Z

72

An experimental study of magnesium-isotope fractionation in chlorophyll-a photosynthesis  

E-Print Network (OSTI)

phosphorylation is a magnesium nuclear spin controlledMagnetic isotope effect of magnesium in phosphoglycerateexchange activities in magnesium chelatase subunits of

Black, J R; Yin, Q Z; Casey, W H

2006-01-01T23:59:59.000Z

73

Synthesis and Evaluation of Poly(3,4-ethylenedioxythiophene) (PEDOT) Coated Magnesium for Nerve Regeneration  

E-Print Network (OSTI)

biodegradation of biocompatable magnesium alloys. Corrosion7th International Conference on Magnesium Alloys and theirapplications. 2007. 1126. Magnesium. obtained from http://

Sebaa, Meriam Amel

2012-01-01T23:59:59.000Z

74

Investigation of elastic weakening in limestone and sandstone samples from moisture adsorption  

Science Journals Connector (OSTI)

......Tittmann (2008) showed that adhesion forces on quartz, mica and calcite minerals...limestones and sandstones shows that the fundamental difference between their respective elastic...Rock Physics and Phase Relations, A Handbook of Physical Constants, AGU Refrence......

L. Pimienta; J. Fortin; Y. Guguen

2014-01-01T23:59:59.000Z

75

On the Dynamic Fragmentation of two Limestones using Edge-on Impact Tests  

E-Print Network (OSTI)

, a crinoidal limestone and the so-called "blanche de Beaucaire." These rocks are extracted from quarries. The mining and quarrying industries aim at controlling the block size distributio

76

Climate VISION: Private Sector Initiatives: Magnesium  

Office of Scientific and Technical Information (OSTI)

Federal/State Programs Federal/State Programs U.S. EPA's SF6 Emission Reduction Partnership for the Magnesium Industry Leading magnesium producers and casting companies are working with the U.S. Environmental Protection Agency (EPA) to alleviate the global environmental threat of climate change. EPA is very proud to cooperate with the industry through the SF6 Emission Reduction Partnership for the Magnesium Industry and the International Magnesium Association (IMA) to protect the climate. This voluntary initiative is guiding research of new technologies, promoting environmental stewardship, and providing a valuable forum to freely exchange technical information. Significant progress has been made to identify and implement SF6 emission reduction strategies since the partnership's inception.

77

Corrosion Analysis of Biodegradable Magnesium Implants.  

E-Print Network (OSTI)

??The purpose of this research is to investigate the micro-galvanic corrosion behavior of the pure magnesium in aqueous solutions, especially in DI water and NaCl (more)

Lee, Namheon

2009-01-01T23:59:59.000Z

78

Laser Ignition of Single Magnesium Particles  

Science Journals Connector (OSTI)

The minimum ignition temperature and minimum ignition energy of single magnesium particles was determined ... levitated ultrasonically and was ignited by a short laser pulse. The temperature transient of the part...

J. F. Zevenbergen; A. E. Dahoe

2000-01-01T23:59:59.000Z

79

Magnesium Front End Design and Development  

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

by: Alan A. Luo and R. C. McCune Presented by: James Quinn, General Motors Unibody Architecture 3-piece Mg front end (bodyframe) USAMP AMD 603 - Magnesium Front End Design and...

80

US WNC MO Site Consumption  

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

WNC MO WNC MO Site Consumption million Btu $0 $500 $1,000 $1,500 $2,000 $2,500 US WNC MO Expenditures dollars ALL ENERGY average per household (excl. transportation) 0 3,000 6,000 9,000 12,000 15,000 US WNC MO Site Consumption kilowatthours $0 $300 $600 $900 $1,200 $1,500 US WNC MO Expenditures dollars ELECTRICITY ONLY average per household * Missouri households consume an average of 100 million Btu per year, 12% more than the U.S. average. * Average household energy costs in Missouri are slightly less than the national average, primarily due to historically lower residential electricity prices in the state. * Missouri homes are typically larger than homes in other states and are more likely to be attached or detached single-family housing units.

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


81

$?$ hyperonic effect on the magnesium dripline  

E-Print Network (OSTI)

Neutron dripline calculations for both magnesium nuclei and magnesium + $\\Lambda$ hypernuclei have been carried out in a microscopic framework using a chiral effective model. The results are compared with two other relativistic mean field models, SPL-40 and NL3. All three models describe the $\\Lambda$ separation energy of known hypernuclei adequately. The extrapolation to the driplines for moderately heavy hypernuclei are found to be strongly model-dependent.

Torsten Schrhoff; Stefan Schramm; Chhanda Samanta

2014-05-28T23:59:59.000Z

82

MoS2  

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

4 4 Myriam Perez De la Rosa1, Gilles Berhault2, Apurva Mehta3, and Russell R. Chianelli1 1University of Texas at El Paso, Materials Research Technology Institute, El Paso, TX 2Institut de Recherches sur la Catalyse, CNRS, Villeurbanne cedex, France 3Stanford Synchrotron Radiation Laboratory, Menlo Park, CA Figure 1: MoS2 layered structure. As the world economy continues to expand the demand for petroleum based fuel increases and the price of these fuels rises. The rising price of fuel has another consequence: refiners tend to purchase cheaper fuels of poorer quality. These poor quality fuels contain increasing amounts of sulfur and other pollutants leading to a decline in air quality worldwide. A recent New York Times article described the major impact a growing Chinese economy

83

Enhancement of direct sulfation of limestone by Na2CO3 addition  

Science Journals Connector (OSTI)

For an oxy-fuel circulating fluidized bed combustion system, the limestone calcination is normally prevented due to excessive CO2 partial pressures and the limestone is subject to a direct sulfation reaction. The enhancement of the direct sulfation of limestone by Na2CO3 was investigated under high CO2 partial pressure in a thermogravimetric apparatus (TGA) and scanning electron microscope (SEM) analysis method. A commercial limestone with a mean size of 18.8?m was used. Experimental results indicate that the incorporation of Na+ ions in solid product CaSO4 lattice structures results in formation of more extrinsic point defects in the crystal lattices of CaSO4 and a significantly increased solid-state diffusivity/mobility in the solid product. So the direct sulfation of Na2CO3-doped limestone shows higher rate and higher degree of conversion in the later stage of sulfation, in comparison with the direct sulfation of original limestone. The reaction changes from diffusional control to chemical reaction control in the presence of Na2CO3 because of the effect of foreign ions on accelerating the solid-state diffusion.

Chuanmin Chen; Ye Zhuang; Chunbo Wang

2009-01-01T23:59:59.000Z

84

Magnesium phosphate glass cements with ceramic-type properties  

DOE Patents (OSTI)

Rapid setting magnesium phosphate (Mg glass) cementitious materials consisting of magnesium phosphate cement paste, polyborax and water-saturated aggregate exhibiting rapid setting and high early strength characteristics. The magnesium glass cement is prepared from a cation-leachable powder and a bivalent metallic ion-accepting liquid such as an aqueous solution of diammonium phosphate and ammonium polyphosphate. The cation-leachable powder includes a mixture of two different magnesium oxide powders processed and sized differently which when mixed with the bivalent metallic ion-accepting liquid provides the magnesium glass cement consisting primarily of magnesium ortho phosphate tetrahydrate, with magnesium hydroxide and magnesium ammonium phosphate hexahydrate also present. The polyborax serves as a set-retarder. The resulting magnesium mono- and polyphosphate cements are particularly suitable for use as a cementing matrix in rapid repair systems for deteriorated concrete structures as well as construction materials and surface coatings for fireproof structures.

Sugama, Toshifumi (Mastic Beach, NY); Kukacka, Lawrence E. (Port Jefferson, NY)

1984-03-13T23:59:59.000Z

85

Magnesium-phosphate-glass cements with ceramic-type properties  

DOE Patents (OSTI)

Rapid setting magnesium phosphate (Mg glass) cementitious materials consisting of magnesium phosphate cement paste, polyborax and water-saturated aggregate, exhibits rapid setting and high early strength characteristics. The magnesium glass cement is prepared from a cation-leachable powder and a bivalent metallic ion-accepting liquid such as an aqueous solution of diammonium phosphate and ammonium polyphosphate. The cation-leachable powder includes a mixture of two different magnesium oxide powders processed and sized differently which when mixed with the bivalent metallic ion-accepting liquid provides the magnesium glass cement consisting primarily of magnesium ortho phosphate tetrahydrate, with magnesium hydroxide and magnesium ammonium phosphate hexahydrate also present. The polyborax serves as a set-retarder. The resulting magnesium mono- and polyphosphate cements are particularly suitable for use as a cementing matrix in rapid repair systems for deteriorated concrete structures as well as construction materials and surface coatings for fireproof structures.

Sugama, T.; Kukacka, L.E.

1982-09-23T23:59:59.000Z

86

Hydrogen storage characteristics of nanograined free-standing magnesiumnickel films  

E-Print Network (OSTI)

of nanograined free-standing magnesiumnickel ?lms MatthewAbstract Free-standing magnesiumnickel (MgNi) ?lms withfree- standing magnesiumnickel ?lms. Magnesium hydride (MgH

2009-01-01T23:59:59.000Z

87

The magnesium nutrition of American upland and Egyptian cottons  

E-Print Network (OSTI)

. Magnesium n1trate, sulfate, and chloxide ax'e highly soluble in water and are read1ly leached from the soil ~ Albert and Armstrong (l) grew cotton plants in nutrient solutions containing two levels of magnesium and found that greater top and root gx... on maturity of cotton X the rate of growth was not afflicted by magnesium supply but symptoms of magnesium deficien)y were present in the foliage of the low magnesium plants ~ Schappelle, Armstrong and Hollis (52) studied the effect of high magnesium...

Helmy, Hussein

1956-01-01T23:59:59.000Z

88

LABORATORY INVESTIGATIONS IN SUPPORT OF CARBON DIOXIDE-LIMESTONE SEQUESTRATION IN THE OCEAN  

SciTech Connect

This semi-annual progress reports includes further findings on CO{sub 2}-in-Water (C/W) emulsions stabilized by fine particles. In previous reports we described C/W emulsions using pulverized limestone (CaCO{sub 3}), flyash, and a pulverized magnesium silicate mineral, lizardite, Mg{sub 3}Si{sub 2}O{sub 5}(OH){sub 4}, which has a similar composition as the more abundant mineral, serpentine. All these materials formed stable emulsions consisting of droplets of liquid or supercritical CO{sub 2} coated with a sheath of particles dispersed in water. During this semi-annual period we experimented with pulverized beach sand (10-20 {micro}m particle diameter). Pulverized sand produced an emulsion similar to the previously used materials. The globules are heavier than water, thus they accumulate at the bottom of the water column. Energy Dispersive X-ray (EDX) analysis revealed that the sand particles consisted mainly of SiO{sub 2}. Sand is one of the most abundant materials on earth, so the economic and energy penalties of using it for ocean sequestration consist mainly of the cost of transporting the sand to the user, the capital and operating costs of the pulverizer, and the energy expenditure for mining, shipping and grinding the sand. Most likely, sand powder would be innocuous to marine organisms if released together with CO{sub 2} in the deep ocean. We examined the effects of methanol (MeOH) and monoethanolamine (MEA) on emulsion formation. These solvents are currently used for pre- and post-combustion capture of CO{sub 2}. A fraction of the solvents may be captured together with CO{sub 2}. A volume fraction of 5% of these solvents in a mix of CO{sub 2}/CaCO{sub 3}/H{sub 2}O had no apparent effect on emulsion formation. Previously we have shown that a 3.5% by weight of common salt (NaCl) in water, simulating seawater, also had no appreciable effect on emulsion formation. We investigated the formation of inverted emulsions, where water droplets coated with pulverized materials are dispersed in liquid or supercritical CO{sub 2}. This is a Water-in-CO{sub 2} emulsion (W/C) stabilized by particles. For a W/C emulsion it is necessary to employ hydrophobic particles, where the particles are primarily wetted by CO{sub 2}. We used the following hydrophobic particles: carbon black, coal dust, and Teflon. All materials were either obtained as fine particles or ground to 10-20 {micro}m size. All these hydrophobic particles produced a stable W/C emulsion.

Dan Golomb; Eugene Barry; David Ryan; Carl Lawton; Peter Swett; Huishan Duan; Matthew Woodcock

2005-04-01T23:59:59.000Z

89

Fabrication and properties of syntactic magnesium foams  

SciTech Connect

Syntactic magnesium foams which consist of thin-walled hollow alumina spheres embedded in a magnesium matrix were fabricated by infiltrating a three-dimensional array of hollow spheres with a magnesium melt by using a gas pressure-assisted casting technique. The resulting composite contains closed cells of homogeneous and isotropic morphology. The densities of the syntactic magnesium foams were between 1.0 and 1.4 g/cm{sup 3}. The densities were controlled by variations in the bulk density of the hollow spheres with the volume fraction of spheres kept constant at approximately 63%. Compressive deformation characteristics of the composites were evaluated with respect to the influence of matrix strength and sphere wall thickness on characteristic variables such as compressive strength, plateau stress and energy absorption efficiency. Differences in the strength of the magnesium-based matrix materials investigated (cp-Mg, AM20, AM50, AZ91) had little influence on the compressive strength of the syntactic foam. However, an increasing relative wall thickness of the hollow ceramic spheres led to a significant strength enhancement. In all cases the ratio between compressive and plateau strength rose with increasing composite strength resulting in decreasing energy absorption efficiency.

Hartmann, M.; Reindel, K.; Singer, R.F. [Univ. of Erlangen (Germany). Dept. of Material Science

1998-12-31T23:59:59.000Z

90

Friction Stir and Ultrasonic Solid State Joining of Magnesium...  

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

and Ultrasonic Solid State Joining of Magnesium to Steel Friction Stir and Ultrasonic Solid State Joining of Magnesium to Steel 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

91

AMD 601 High Integrity -Magnesium Automotive Components (HI-MAC...  

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

AMD 601 High Integrity -Magnesium Automotive Components (HI-MAC) AMD 601 High Integrity -Magnesium Automotive Components (HI-MAC) Presentation from the U.S. DOE Office of Vehicle...

92

Stratigraphy and diagenesis of the Mississippian Lodgepole Limestone, Williston Basin, North Dakota  

SciTech Connect

Stratigraphic correlation of the Lodgepole Limestone (Bottineau Interval) indicates a sequence of three clinoform-shaped wedges that filled in the early Williston Basin. To date four productive 100m thick mounds have been discovered in the Lodgepole Limestone at Dickinson Field. The mounds seem to have nucleated at the toe of slope of the first highstand system tract and were subsequently buried by the second highstand systems tract. By isopaching each of the systems tracts one can predict were other mounds might have nucleated. Burial depth of the Bakken Shale-Lodgepole Limestone contact grade from 0.6 km at the edge of the Williston Basin to 3.4 km in the center. With increased depth the basal Lodgepole Limestone shows three phases of dolomitization, which are: small clear early dolomite; later iron rich fracture filling saddle dolomite and a later iron rich dolomite that seems to follow stylolites. Pre-oil migration mineralization of the overlying limestone include minor amounts of: anhydrite, pyrite, iron poor sphalerite, late iron rich sphalerite, chalcopyrite and celestite.

Grover, P.W. (Texas A M Univ., College Station, TX (United States))

1996-01-01T23:59:59.000Z

93

Stratigraphy and diagenesis of the Mississippian Lodgepole Limestone, Williston Basin, North Dakota  

SciTech Connect

Stratigraphic correlation of the Lodgepole Limestone (Bottineau Interval) indicates a sequence of three clinoform-shaped wedges that filled in the early Williston Basin. To date four productive 100m thick mounds have been discovered in the Lodgepole Limestone at Dickinson Field. The mounds seem to have nucleated at the toe of slope of the first highstand system tract and were subsequently buried by the second highstand systems tract. By isopaching each of the systems tracts one can predict were other mounds might have nucleated. Burial depth of the Bakken Shale-Lodgepole Limestone contact grade from 0.6 km at the edge of the Williston Basin to 3.4 km in the center. With increased depth the basal Lodgepole Limestone shows three phases of dolomitization, which are: small clear early dolomite; later iron rich fracture filling saddle dolomite and a later iron rich dolomite that seems to follow stylolites. Pre-oil migration mineralization of the overlying limestone include minor amounts of: anhydrite, pyrite, iron poor sphalerite, late iron rich sphalerite, chalcopyrite and celestite.

Grover, P.W. [Texas A& M Univ., College Station, TX (United States)

1996-12-31T23:59:59.000Z

94

Magnesium content of calcite in carapaces of benthic armine Ostracoda  

E-Print Network (OSTI)

difference in magnesium content among superfamily groups is not known but may be due to the fact that the cytheraceans are more highly evolved than the other groups studied. Variation of water temperature was judged to be a significant source of variation... control of the magnesium content of calcite. He believed that phyla considered more advanced might be better able to discriminate against magnesium during precipitation of calcite. Blatt, Middleton, and Murray (1972) suggested that magnesium causes a...

Cadot, H. M.; Kaesler, R. L.

1977-07-22T23:59:59.000Z

95

REGULAR ARTICLE Why calcium inhibits magnesium-dependent enzyme  

E-Print Network (OSTI)

REGULAR ARTICLE Why calcium inhibits magnesium-dependent enzyme phosphoserine phosphatase. Keywords Phosphoserine phosphatase Á Magnesium Á Calcium Á Density functional calculations Á Inhibition mechanism 1 Introduction Phosphoserine phosphatase (PSP, EC 3.1.3.3) is a mono- nuclear magnesium

Liao, Rongzhen

96

The Microstructure of Mechanically Alloyed Nanocrystalline Aluminium-Magnesium  

E-Print Network (OSTI)

The Microstructure of Mechanically Alloyed Nanocrystalline Aluminium-Magnesium Jen Gubicza1 analysis. Magnesium gradually goes into solid solution during ball milling and after 3 h almost all. Experimental A series of aluminium-magnesium samples were prepared from high purity aluminium (99.9%) powder

Gubicza, Jenõ

97

The influence of magnesium deficiency on inflammatory reaction in rats  

E-Print Network (OSTI)

The influence of magnesium deficiency on inflammatory reaction in rats Régine DELAIGUE, P. DUCHENE, France. Summary. The inflammatory reactions obtained in magnesium-deficient rats, by injecting of inflammatory reactions observed in magnesium- deficient rats could not be explained only by histamine

Paris-Sud XI, Université de

98

NUCLEATION PHENOMENON IN SiC PARTICULATE REINFORCED MAGNESIUM COMPOSITE  

E-Print Network (OSTI)

NUCLEATION PHENOMENON IN SiC PARTICULATE REINFORCED MAGNESIUM COMPOSITE Y. Cai, D. Taplin, M.J. Tan performance of matrix metals and alloys. Most magnesium alloy based MMCs are produced via a casting process into the last freezing interdendritic regions. For magnesium based composites, both particle pushing (or capture

Zhou, Wei

99

The Bolting of Magnesium Components in Car Engines  

E-Print Network (OSTI)

1 The Bolting of Magnesium Components in Car Engines Sarennah J.P. Longworth Newnham College vehicles. At present this is achieved through the use of ultralight steels, aluminium alloys and magnesium alloys for some body parts. Magnesium has the highest strength-to-weight ratio of any structural metal

Cambridge, University of

100

BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE  

E-Print Network (OSTI)

595 BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE C. JOUANIN, J. P. ALBERT and C'autres transitions expéri- mentales. Abstract. 2014 The electronic band structure of magnesium fluoride is calculated, only some qualitative investigations exist for the calcium and magnesium fluorides [1, 2]. This lack

Paris-Sud XI, Université de

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


101

Distribution of Grain Boundary Planes and Misorientations in Magnesium Oxide  

E-Print Network (OSTI)

Distribution of Grain Boundary Planes and Misorientations in Magnesium Oxide D.M. Saylor 1 , A distribution, magnesium oxide. Abstract. We have developed a technique that allows the geometry of polycrystalline magnesium oxide. Using these data, we have specified the distribution of grain boundaries within

Rohrer, Gregory S.

102

SOLID STATE JOINING OF MAGNESIUM TO STEEL  

SciTech Connect

Friction stir welding and ultrasonic welding techniques were applied to join automotive magnesium alloys to steel sheet. The effect of tooling and process parameters on the post-weld microstructure, texture and mechanical properties was investigated. Static and dynamic loading were utilized to investigate the joint strength of both cast and wrought magnesium alloys including their susceptibility and degradation under corrosive media. The conditions required to produce joint strengths in excess of 75% of the base metal strength were determined, and the effects of surface coatings, tooling and weld parameters on weld properties are presented.

Jana, Saumyadeep; Hovanski, Yuri; Pilli, Siva Prasad; Field, David P.; Yu, Hao; Pan, Tsung-Yu; Santella, M. L.

2012-06-04T23:59:59.000Z

103

Solvation of Magnesium Dication: Molecular Dynamics Simulation and Vibrational Spectroscopic Study of Magnesium Chloride in Aqueous Solutions  

E-Print Network (OSTI)

Solvation of Magnesium Dication: Molecular Dynamics Simulation and Vibrational Spectroscopic Study of Magnesium Chloride in Aqueous Solutions Karen M. Callahan, Nadia N. Casillas-Ituarte, Martina Roeselova 26, 2010 Magnesium dication plays many significant roles in biochemistry. While it is available

104

Accumulation of surface-applied agricultural limestone in acid soils of east Texas  

E-Print Network (OSTI)

, Georgetown is considered a 20 Table 2. Elemental analysis of agricultural limestone sam les ( ercenta e basis) . T Source %Ca %N %Si %Fe %Nn Georgetown Hugo Idabel 34. 6a 37. 4b 35. 2a 3. 0a 1. 0a 0. 2a 0. 00a 0. 3b 0. 4b 0. 2a 0. 05b 0. 4b 1. 7c 0.... Wilding (Member) Marvin W. Rowe (Member) E. C. A. Run (Head of Department) August 1987 ABSTRACT Accumulation of Surface-applied Agricultural Limestone in Acid Soils of East Texas. (August 1987) Earl Raymond Allen, B. Stf University of Illinois...

Allen, Earl Raymond

2012-06-07T23:59:59.000Z

105

Direct Hydrogenation Magnesium Boride to Magnesium Borohydride: Demonstration of >11 Weight Percent Reversible Hydrogen Storage  

SciTech Connect

We here for the first time demonstrate direct hydrogenation of magnesium boride, MgB2, to magnesium borohydride, Mg(BH4)2 at 900 bar H2-pressures and 400C. Upon 14.8wt% hydrogen release, the end-decomposition product of Mg(BH4)2 is MgB2, thus, this is a unique reversible path here obtaining >11wt% H2 which implies promise for a fully reversible hydrogen storage material.

Severa, Godwin; Ronnebro, Ewa; Jensen, Craig M.

2010-11-16T23:59:59.000Z

106

Assessment of the magnesium primary production technology. Final report  

SciTech Connect

At current production levels, direct energy savings achievable in primary magnesium production are 1.2 milliquads of energy per annum. Were magnesium to penetrate the automotive market to an average level of 50 pounds per vehicle, the resultant energy savings at the production stage would be somewhat larger, but the resulting savings in gasoline would conserve an estimated 325 milliquads of energy per year. The principal barrier to more widespread use of magnesium in the immediate future is its price. A price reduction of magnesium of 10% would lead to widespread conversion of aluminum die and permanent mold castings to magnesium. This report addresses the technology of electrolytic and thermic magnesium production and the economics of expanded magnesium production and use.

Flemings, M.C.; Kenney, G.B.; Sadoway, D.R.; Clark, J.P.; Szekely, J.

1981-02-01T23:59:59.000Z

107

Development of Integrated Die Casting Process for Large Thin-Wall Magnesium Applications Enabling Production of Lightweight Magnesium Parts for Near-Term Automotive Applications, April 2013  

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

Development of Integrated Die Casting Process for Large Thin-Wall Magnesium Applications Enabling Production of Lightweight Magnesium Parts for Near-Term Automotive Applications

108

Concrete international /january 2010 35 Portland limestone cement (PLC) is produced by  

E-Print Network (OSTI)

Concrete international /january 2010 35 Portland limestone cement (PLC) is produced by blending demonstration of PLC concrete in the late-fall construction of a parking lot at a ready mixed concrete plant near Gatineau, QC, Canada. The performance of the plastic and hardened concretes produced with PLC

109

Lead, zinc, and strontium in limestone cap rock from Tatum salt dome, Mississippi  

SciTech Connect

Limestone cap rock at Tatum salt dome, Mississippi, contains disseminated pyrite, sphalerite, and galena, and disseminated to massive amounts of strontianite (SrCO/sub 3/) and celestite (SrSO/sub 4/). Sulfide minerals are locally present in bitumen-rich areas of the upper, massive portion of the limestone cap rock, whereas strontium minerals are disseminated throughout this zone. However, sulfide and strontium minerals are most abundant in the lower banded portion of the limestone cap rock, which consists of alternating subhorizontal light and dark-colored bands. The dark bands are composed of calcite of variable grain size, sulfides, quartz, dolomite, albite, and up to 1% bitumen that apparently formed by the biodegradation of crude oil. Lighter bands are composed of variable amounts of coarsely crystalline, euhedral calcite, strontianite, and celestite resulting in strontium (Sr) contents of up to 30% locally. Banded limestone cap rock at Tatum dome formed at the top of the actively dissolving anhydrite zone by a combination of sulfate reduction and oxidation of liquid hydrocarbons by bacteria to cause the precipitation of calcite and sulfide minerals and the accumulation of insoluble residue from the anhydrite (quartz, albite, dolomite). Lead and zinc in the sulfide minerals could have been derived from the dissolving anhydrite, but the abundance of Sr minerals present requires an external source. Present-day oil field brines in central Mississippi contain up to 3000 ppm Sr, and basin brines of similar composition apparently contributed Sr to the cap-rock environment during formation.

Saunders, J.A.

1988-09-01T23:59:59.000Z

110

Remanent Magnetism in Jurassic Red Limestones and Radiolarites from the Alps  

Science Journals Connector (OSTI)

......magnetism of ferromagnetic minerals by chemical reactions...represented by limestones-red lime- stones of various types...The basal portion is green to grey. The upper contact...covered I Radiolarite, green-gray Shale, greenish-gray...potentially ferromagnetic mineral present. The haematite......

Robert B. Hargraves; Alfred G. Fischer

1959-03-01T23:59:59.000Z

111

Distribution of authigenic albites in a limestone succession of the Helvetic Domain, eastern Switzerland  

E-Print Network (OSTI)

exclusively in limestones with a carbonate content higher than 80 wt-%. A diagenetic or hydrothermal origin contenant plus de 80 %m de carbonate. La possibilité d'une origine diagéné- tique ou hydrothermale est to a thin section scale, and we discuss a possible diagenetic or hydrothermal origin of these albites. 2

Gilli, Adrian

112

Modeling Surface Waves from Aboveground and Underground Explosions in Alluvium and Limestone  

Science Journals Connector (OSTI)

...reinke@dtra.mil The May 2012 HUMBLE REDWOOD III (HRIII) experiment series...alluvium conducted as part of the HUMBLE REDWOOD I and II (HRI and HRII) experiments...limestone as part of the May 2012 HUMBLE REDWOOD III (HRIII) experiment series...

Jessie L. Bonner; David R. Russell; Robert E. Reinke

113

Compaction and Sintering of Mo Powders  

SciTech Connect

To support the development of Mo-99 production by NorthStar Medical Technologies, LLC, Mo metal powders were evaluated for compaction and sintering characteristics as they relate to Mo-100 accelerator target disk fabrication. Powders having a natural isotope distribution and enriched Mo-100 powder were examined. Various powder characteristics are shown to have an effect on both the compaction and sintering behavior. Natural Mo powders could be cold pressed directly to >90% density. All of the powders, including the Mo-100 samples, could be sintered after cold pressing to >90% density. As an example, a compacted Mo-100 disk reached 89.7% density (9.52 g/cm3) after sintering at 1000 C for 1 hr. in flowing Ar/4%H2. Higher sintering temperatures were required for other powder samples. The relationships between processing conditions and the resulting densities of consolidated Mo disks will be presented.

Nunn, Stephen D [ORNL] [ORNL; Kiggans, Jim [ORNL] [ORNL; Bryan, Chris [ORNL] [ORNL

2013-01-01T23:59:59.000Z

114

DOE - Office of Legacy Management -- St Louis Airport - MO 01  

Office of Legacy Management (LM)

Airport - MO 01 Airport - MO 01 FUSRAP Considered Sites St. Louis Airport, MO Alternate Name(s): Airport Site St. Louis Airport Storage Site (SLAPS) Former Robertson Storage Area Robertson Airport MO.01-1 MO.01-2 Location: Brown Road, Robertson, Missouri MO.01-2 Historical Operations: Stored uranium process residues containing uranium, radium, and thorium for the MED and AEC. MO.01-2 MO.01-3 MO.01-4 Eligibility Determination: Eligible MO.01-1 MO.01-7 Radiological Survey(s): Assessment Surveys MO.01-4 MO.01-5 Site Status: Cleanup in progress by U.S. Army Corps of Engineers. MO.01-6 USACE Website Long-term Care Requirements: To be determined upon completion. Also see Documents Related to St. Louis Airport, MO MO.01-1 - DOE Memorandum; Coffman to LaGrone; Subject: Authorization

115

Laser-induced magnesium production from magnesium oxide using reducing agents  

SciTech Connect

Experiments for laser induced production of magnesium (Mg) from magnesium oxide (MgO) using reducing agents (R) were conducted. In these experiments, continuous wave CO{sub 2} focused laser is focused on a mixture of magnesium oxide and reducing agent. High power density of focused laser leads to high temperature and the reduction reaction resulting in Mg production. The resultant vapor is collected on a copper plate and analyzed in terms of magnesium deposition efficiency. Deposition efficiencies with various reducing agents such as Zr, C, and Si have been measured to be 60, 9.2, and 12.1 mg/kJ respectively. An excess addition of reducing agent over their corresponding reaction stoichiometric amounts is found to be optimum condition for the most of performed laser induced reactions. In addition, utilizing solar-pumped laser in Mg production with reducing agent will reduce CO{sub 2} emission and produce magnesium with high-energy efficiency and large throughput.

Mohamed, M. S.; Yabe, T.; Baasandash, C.; Sato, Y.; Mori, Y.; Shi-Hua, Liao; Sato, H.; Uchida, S. [Entropia Laser Initiative, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8552 (Japan)

2008-12-01T23:59:59.000Z

116

Lead magnesium niobate actuator for micropositioning  

DOE Patents (OSTI)

An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated.

Swift, Charles D. (Livermore, CA); Bergum, John W. (Concord, CA)

1994-01-01T23:59:59.000Z

117

Lead magnesium niobate actuator for micropositioning  

DOE Patents (OSTI)

An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated. 3 figs.

Swift, C.D.; Bergum, J.W.

1994-10-25T23:59:59.000Z

118

The Oxygen core inside the Magnesium isotopes  

E-Print Network (OSTI)

We have studied the ground state bulk properties of magnesium isotopes using axially symmetric relativistic mean field formalism. The BCS pairing approach is employed to take care of the pairing correlation for the open shell nuclei. The contour plot of the nucleons distribution are analyzed at various parts of the nucleus, where clusters are located. The presence of an $^{16}$O core along bubble like $\\alpha$-particle(s) and few {\\it nucleons} are found in the Mg isotopes.

Bhuyan, M

2013-01-01T23:59:59.000Z

119

Impurity control and corrosion resistance of magnesium-aluminum alloy  

SciTech Connect

The corrosion resistance of magnesium alloys is very sensitive to the contents of impurity elements such as iron. In this study, a series of diecast AXJ530 magnesium alloy samples were prepared with additions of Mn and Fe. Through a comprehensive phase diagram calculation and corrosion evaluation, the mechanisms for the tolerance limit of Fe in magnesium alloy are discussed. This adds a new dimension to control the alloying impurity in terms of alloying composition design and casting conditions.

Liu, M. [GM China Lab] [GM China Lab; Song, GuangLing [ORNL] [ORNL

2013-01-01T23:59:59.000Z

120

Reversible Dehydrogenation of Magnesium Borohydride to Magnesium Triborane in the Solid State Under Moderate Conditions  

SciTech Connect

Thermal decomposition of magnesium borohydride, Mg(BH4)2, in the solid state was studied by a combination of PCT, TGA/MS and NMR spectroscopy. Dehydrogenation of Mg(BH4)2 at 200 C, results in the highly selective formation of magnesium triborane, Mg(B3H8)2. This process is reversible at 250 C under 120 atm H2. Dehydrogenation at higher temperature, > 300 C, produces a complex mixture of polyborane species. Solution phase 11B NMR spectra of the hydrolyzed decomposition products reveals the formation of the B3H8 anion, boric acid from hydrolysis of the unstable polyboranes (BnHx) (n = 3-11, x >8), and the closoborane B12H12 dianion as a minor product. A BH condensation mechanism involving metal hydride formation is proposed to explain the limited reversible hydrogen storage in magnesium borohydride.

Chong, Marina; Karkamkar, Abhijeet J.; Autrey, Thomas; Orimo, Shin-ichi; Jalisatgi, Satish; Jensen, Craig M.

2011-02-17T23:59:59.000Z

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


121

E-Print Network 3.0 - anhydrous magnesium chloride Sample Search...  

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

magnesium ion concentration dependence of strand exchange... M Tris-acetate or Tris-HCI (pH 7.5), IO mM magnesium acetate or magnesium chloride, 3.7% glycerol, 1 m... and...

122

Development of High-Volume Warm Forming of Low-Cost Magnesium...  

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

More Documents & Publications Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet Magnesium...

123

Rapidly solidified magnesium: nickel alloys as hydrogen storage materials.  

E-Print Network (OSTI)

??Due to high hydrogen capacity, good reversibility and low cost, magnesium hydride is one of the most promising hydrogen storage materials. However, the high desorption (more)

Yi, Xiaodong

2014-01-01T23:59:59.000Z

124

Climate VISION: Private Sector Initiatives: Magnesium: GHG Inventory...  

Office of Scientific and Technical Information (OSTI)

GHG Inventory Protocols The Magnesium Industry Partnership's SF6 emissions tracking and reporting software tool (Excel based) can be accessed by visiting the Partnership's...

125

Failure of extruded magnesium alloy tubes during hydroforming.  

E-Print Network (OSTI)

??Research is currently being conducted on the feasibility of hydroforming extruded magnesium tubes to integrate multiple parts into a single hydroformed section. Among other advantages, (more)

Hiscocks, Jessica.

2006-01-01T23:59:59.000Z

126

Magnesium Front End Design and Development | Department of Energy  

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

Design and Development Magnesium Front End Design and Development 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May...

127

Magnesium Front End Development (AMD 603/604/904) | Department...  

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

Development (AMD 603604904) Magnesium Front End Development (AMD 603604904) 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and...

128

Lithologic and structural controls of limestone-hosted Pb-Zn-Ag mineralization in Chihuahua, Mexico  

SciTech Connect

The state of Chihuahua contains some of the most important limestone-hosted ore deposits in Mexico. The best example are Santa Eulalia and Naica which together have produced 53 million tons or ore averaging 7.7% Pb, 6.4% Zn, and 280 g/ton Ag. These deposits occur as mantos and chimneys often accompanied by calc-silicates. Among the most critical questions in this type of deposit is the control that the limestone-host exerts on the mineralizing process. Here the authors present the first detailed data on the stratigraphic and lithologic character of the limestone-hosts at Naica and Santa Eulalia. All ore at Naica and Santa Eulalia is hosted by micrites, biomicrites and biosparites indicative of generally quiet marine deposition. The authors work suggests that the western edge of the this trough might be a low angle, east dipping ramp which extends below the Sierra Madre Occidental. The primary permeability of the limestone that hosts Naica and Santa Eulalia is in the micro to nanodarcy range. The effective permeability has been augmented by 3 or 4 stages of micro-fracturing. Most of the ore is controlled by these fractures and by felsic dikes, which in cases are mostly endoskarn. Stylolites also appear to have exerted a control on the mineralizing process. Numerous instances of alteration and recrystallization confined to one side of a horizontal stylolite have been noted. At Santa Eulalia, horizontal stylolites have controlled the emplacement of massive sulfide mantos, suggesting that the mineralizing process was rather passive.

Lofquist, D.J.; Ruiz, J.

1985-01-01T23:59:59.000Z

129

Characterisation of hydraulic fractures in limestones using X-ray microtomography  

E-Print Network (OSTI)

Hydraulic tension fractures were produced in porous limestones using a specially designed hydraulic cell. The 3D geometry of the samples was imaged using X-ray computed microtomography before and after fracturation. Using these data, it was possible to estimate the permeability tensor of the core samples, extract the path of the rupture and compare it to the heterogeneities initially present in the rock.

Renard, Francois; Desrues, Jacques; Plougonven, Erwan; Ougier-Simonin, Audrey

2006-01-01T23:59:59.000Z

130

E-Print Network 3.0 - annealed magnesium silicate Sample Search...  

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

341, 2005 Summary: to predict the infrared spectrum of an amorphous magnesium silicate condensate after thermal annealing over... to anneal on the same timescale as magnesium...

131

Magnesium isotopic fractionation in chondrules from the Murchison and Murray CM2 carbonaceous chondrites  

E-Print Network (OSTI)

Magnesium isotopic fractionation in chondrules from the Murchison and Murray CM2 carbonaceous. Investigation of the magnesium isotopic compositions of chondrules can place stringent constraints on the timing

Grossman, Lawrence

132

The stratigraphy and environment of deposition of productive Wilcox clays in west central Freestone and southeast Limestone Counties, Texas  

E-Print Network (OSTI)

THE STRATIGRAPHY AND ENVIRONMENT OF DEPOSITION OF PRODUCTIVE WILCOX CLAYS IN WEST CENTRAL FREESTONE AND SOUTHEAST LIMESTONE COUNTIES, TEXAS A Thesis by STEPHANIE ANNE SHELVEY Submitted to the Graduate College of Texas ARM University... in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1986 Major Subject: Geology THE STRATIGRAPHY AND ENVIRONMENT OF DEPOSITION OF PRODUCTIVE WILCOX CLAYS IN WEST CENTRAL FREESTONE AND SOUTHEAST LIMESTONE COUNTIES, TEXAS A...

Shelvey, Stephanie Anne

2012-06-07T23:59:59.000Z

133

DOE - Office of Legacy Management -- Latty Avenue Site - MO 04  

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

Latty Avenue Site - MO 04 Latty Avenue Site - MO 04 FUSRAP Considered Sites Latty Avenue Site, MO Alternate Name(s): Futura Coatings Futura Chemical Company Facility Hazelwood Interim Storage Site (HISS) Former Cotter Site, Latty Avenue Properties Contemporary Metals Corp. Continental Mining and Milling MO.04-1 MO.04-2 MO.04-5 MO.04-6 MO.06-8 MO.06-11 Location: 9200 Latty Avenue, Hazelwood, Missouri MO.04-1 Historical Operations: Received, stored, and processed uranium residues for the AEC. Storage and processing were licensed by the AEC and NRC and resulted in contamination of uranium and thorium. MO.04-5 MO.04-6 Eligibility Determination: Eligible MO.04-3 MO.04-4 Radiological Survey(s): Assessment Surveys MO.04-2 MO.04-7 MO.04-8 MO.04-9 MO.04-10 MO.04-11 Site Status: Cleanup in progress by U.S. Army Corps of Engineers. MO.04-12

134

Nano-engineering of magnesium hydride for hydrogen storage  

Science Journals Connector (OSTI)

The destabilization of magnesium hydride (MgH"2) by solid-state reaction with Si in a nanoscale under vacuum was studied. The nanostructured Si films were deposited on the nanocrystalline MgH"2/Mg composite substrate by the pulsed laser deposition (PLD). ... Keywords: Destabilization, Magnesium hydride, Microstructure, Nano-engineering, Silicon

J. Bystrzycki; T. P?oci?ski; W. Zieli?ski; Z. Winiewski; M. Polanski; W. Mrz; Z. Bojar; K. J. Kurzd?owski

2009-04-01T23:59:59.000Z

135

Scattering of Fast Neutrons by Magnesium  

Science Journals Connector (OSTI)

Angular distributions for the scattering of fast neutrons by magnesium have been obtained for incident neutron energies of 2.0, 3.0, 4.0, and 5.0 Mev. The results for the elastic scattering have been compared with optical model calculations. The results for the inelastic scattering have been compared with calculations based on Hauser-Feshbach theory, and with direct interaction predictions. Over the range of conditions investigated, compound nucleus formation appears to be the dominant mechanism for the inelastic scattering.

D. B. Thomson; L. Cranberg; J. S. Levin

1962-03-15T23:59:59.000Z

136

Fabrication of faceted nanopores in magnesium  

SciTech Connect

In this paper, using high resolution transmission electron microscopy, we showed the fabrication of faceted nanopores with various shapes in magnesium by focused electron beam (e-beam). The characteristics of nanopore shapes and the crystallographic planes corresponding to the edges of the nanopores were discussed in detail. Interestingly, by manipulating the e-beam (e.g., irradiation direction and duration), the nanopore shape and size could be effectively controlled along different directions. Our results provide important insight into the nanopore patterning in metallic materials and are of fundamental importance concerning the relevant applications, such as nanopore-based sensor, etc.

Wu, Shujing; Cao, Fan; Zheng, He; Sheng, Huaping; Liu, Chun; Liu, Yu; Zhao, Dongshan; Wang, Jianbo, E-mail: wang@whu.edu.cn [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072 (China)] [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072 (China)

2013-12-09T23:59:59.000Z

137

Climate VISION: Private Sector Initiatives: Magnesium: Resources and Links  

Office of Scientific and Technical Information (OSTI)

Technical Information Technical Information Publications CD-ROMs Publications The following publications are available for download as Adobe PDF documents. Download Acrobat Reader Cooperative Study of Magnesium Melt Protection Technologies: Emissions Characterization and Occupational Exposure. (PDF 275 KB) EPA Conference on SF6 and the Environment (2006) presentation by Holger Brandt, Lunt Manufacturing, and Scott Bartos, U.S. EPA. The Alternatives to SF6 for Magnesium Melt Protection brochure, published in Chinese, English, and Japanese language versions, was first introduced to the industry and public at the 63rd Annual World Magnesium Conference in Beijing, China on May 21, 2006. EPA collaborated with the International Magnesium Association (IMA), China Magnesium Association (CMA), and Japan

138

First-principles calculations of twin-boundary and stacking-fault energies in magnesium  

E-Print Network (OSTI)

First-principles calculations of twin-boundary and stacking-fault energies in magnesium Y. Wang and stacking faults in metal magnesium have been calculated using first-principles supercell approach. Four. Keywords: Magnesium; Interfaces; Twinning; First-principles calculation Magnesium alloys are increasingly

Chen, Long-Qing

139

Sulfates on Mars: A systematic Raman spectroscopic study of hydration states of magnesium sulfates  

E-Print Network (OSTI)

Sulfates on Mars: A systematic Raman spectroscopic study of hydration states of magnesium sulfates of magnesium sulfates on the martian surface. In situ identification of the hydration states of magnesium of magnesium sulfate. Characteristic and distinct Raman spectral patterns were observed for each of the 11

140

Spinelolivine magnesium isotope thermometry in the mantle and implications for the Mg isotopic composition of Earth  

E-Print Network (OSTI)

Spinel­olivine magnesium isotope thermometry in the mantle and implications for the Mg isotopic: magnesium isotopes mantle geochemistry meteorites MC-ICPMS The magnesium isotopic composition of Earth., 2004; Poitrasson et al., 2005; Georg et al., 2007; Poitrasson, 2007; Weyer et al., 2007). Magnesium

Manning, Craig

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


141

Prompt ?-ray spectroscopy of the Mo104 and Mo108 fission fragments  

Science Journals Connector (OSTI)

The level structures of the neutron-rich Mo104 and Mo108 nuclei have been investigated by observing prompt ? rays emitted in the spontaneous fission of Cm248 with the EUROGAM spectrometer. Levels with spins up to 12? have been observed and ? branching obtained. The data can be satisfactorily described when Mo104,108 are considered as axially symmetric nuclei: in Mo104, rotational bands based on the ground state, the one-phonon and the two-phonon ?-vibrational states and a quasiparticle state have been observed, whereas in Mo108 the information is limited to the yrast band and the one phonon ? band. 1996 The American Physical Society.

A. Guessous; N. Schulz; M. Bentaleb; E. Lubkiewicz; J. L. Durell; C. J. Pearson; W. R. Phillips; J. A. Shannon; W. Urban; B. J. Varley; I. Ahmad; C. J. Lister; L. R. Morss; K. L. Nash; C. W. Williams; S. Khazrouni

1996-03-01T23:59:59.000Z

142

NO. REV. MO. ~ssessment of Two Year  

E-Print Network (OSTI)

) 200 hours operation of LSPE Central Electronics, 90 hours on timers, 1 hour for thermal battery Operations ·· Thermal/Power Prediction vs Time ·· Qualification Levels #12;MO. ltiV. MO. Assessment of Two and items powered by battery. Is with all functions intact and in- cludes all 8 EPA's (active mode) · 2

Rathbun, Julie A.

143

An EPR study of ?O? on magnesium oxide  

E-Print Network (OSTI)

AN EPR STUDY OF 0 ON MAGNESIUM OXIDE A Thesis by NING-SEW WONG Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1971 Major Subject: Chemistry AN EPR... STUDY OF 0 ON MAGNESIUM OXIDE A Thesis by NING-BEN WONG Approved as to style and content by: (Chairman of Committe (Head of Department) (Member) (Member) May 1971 ABSTRACT 17 An EPR Study of 0 on Magnesium Oxide (May, 1971) Ning-Bew Wong, B...

Wong, Ning-Bew

2012-06-07T23:59:59.000Z

144

Process for converting magnesium fluoride to calcium fluoride  

DOE Patents (OSTI)

This invention is a process for the conversion of magnesium fluoride to calcium fluoride whereby magnesium fluoride is decomposed by heating in the presence of calcium carbonate, calcium oxide or calcium hydroxide. Magnesium fluoride is a by-product of the reduction of uranium tetrafluoride to form uranium metal and has no known commercial use, thus its production creates a significant storage problem. The advantage of this invention is that the quality of calcium fluoride produced is sufficient to be used in the industrial manufacture of anhydrous hydrogen fluoride, steel mill flux or ceramic applications.

Kreuzmann, A.B.; Palmer, D.A.

1984-12-21T23:59:59.000Z

145

DOE - Office of Legacy Management -- West Lake Landfill - MO...  

Office of Legacy Management (LM)

Lake Landfill - MO 05 FUSRAP Considered Sites Site: West Lake Landfill (MO.05) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site Disposition:...

146

It's Elemental - Isotopes of the Element Magnesium  

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

Sodium Sodium Previous Element (Sodium) The Periodic Table of Elements Next Element (Aluminum) Aluminum Isotopes of the Element Magnesium [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Mass Number Natural Abundance Half-life 24 78.99% STABLE 25 10.00% STABLE 26 11.01% STABLE Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 19 4.0 picoseconds Double Proton Emission 100.00% 20 90.8 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission ~ 27.00% 21 122 milliseconds Electron Capture 100.00% Electron Capture with delayed Proton Emission 32.60% Electron Capture with delayed Alpha Decay < 0.50%

147

Das Mischungsverhalten von Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge  

Science Journals Connector (OSTI)

Mittels homogenisierter Sinter-und Schmelzproben wird die Bildung von lckenlosen Mischreihen zwischen Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge nachgewiesen.

H. Holleck; F. Benesovsky; H. Nowotny

1962-01-01T23:59:59.000Z

148

ITP Mining: Energy and Environmental Profile of the U.S. Mining Industry: Chapter 9: Limestone and Crushed Rock  

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

9 9 Limestone and Crushed Rock Crushed rock is one of the most accessible natural resources and a major basic raw material. It is used in construction, agriculture, and other industries using complex chemical and metallurgical processes. Despite the low value of its basic products, the crushed rock industry is a major contributor to and an indicator of the economic well being of the nation. Forms Of Crushed Rock About three-quarters of the crushed stone production is limestone and dolomite, followed by, in descending order of tonnage: granite, traprock, sandstone and quartzite, miscellaneous stone, marble, slate, calcareous marl, shell, volcanic cinder and scoria. Limestone, one of the largest produced crushed rock, is a sedimentary rock composed

149

Category:Kansas City, MO | Open Energy Information  

Open Energy Info (EERE)

MO MO Jump to: navigation, search Go Back to PV Economics By Location Media in category "Kansas City, MO" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Kansas City MO Union Electric Co.png SVFullServiceRestauran... 74 KB SVHospital Kansas City MO Union Electric Co.png SVHospital Kansas City... 66 KB SVLargeHotel Kansas City MO Union Electric Co.png SVLargeHotel Kansas Ci... 66 KB SVLargeOffice Kansas City MO Union Electric Co.png SVLargeOffice Kansas C... 65 KB SVMediumOffice Kansas City MO Union Electric Co.png SVMediumOffice Kansas ... 65 KB SVMidriseApartment Kansas City MO Union Electric Co.png SVMidriseApartment Kan... 74 KB SVOutPatient Kansas City MO Union Electric Co.png SVOutPatient Kansas Ci... 66 KB SVPrimarySchool Kansas City MO Union Electric Co.png

150

Effects of graphene on MoO2-MoS2 composite as anode material for lithium-ion batteries  

Science Journals Connector (OSTI)

The electrochemical properties of MoO2-MoS2/graphene electrode were compared with those of MoO2-MoS2, bulk MoS2, and graphene electrode. MoO2-MoS2 composite was prepared by a hydrothermal reaction of molybdenum (...

Moon-Jin Hwang; Kwang Man Kim; Kwang-Sun Ryu

2014-07-01T23:59:59.000Z

151

Ames Lab 101: BAM (Boron-Aluminum-Magnesium)  

ScienceCinema (OSTI)

Materials scientist, Bruce Cook, discusses the super hard, low friction, and lubricious alloy know as BAM (Boron-Aluminum-Magnesium). BAM was discovered by Bruce Cook and his team a

Bruce Cook

2013-06-05T23:59:59.000Z

152

Magnesium-Intensive Front End Sub-Structure Development  

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

Project ID "LM077" USAMP AMP800 1 2013 DOE Merit Review Presentation Alan A. Luo General Motors Global Research and Development May 16, 2013 Magnesium-Intensive Front End...

153

Microplasticity and fatigue of some magnesium-lithium alloys  

Science Journals Connector (OSTI)

Cyclic stress-strain curves have been obtained for a series of magnesium-lithium alloys with lithium contents up to 12. 5wt%. The ... hardening exponents for stresses leading to failure in excess of 104...cycles ...

R. E. Lee; W. J. D. Jones

1974-03-01T23:59:59.000Z

154

Magnesium Front End Research And Development (AMD604) | Department...  

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

Research And Development (AMD604) Magnesium Front End Research And Development (AMD604) Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on...

155

Magnesium and Copper (II) Chloride: A Curious Redox Reaction .  

E-Print Network (OSTI)

??The focus of this research is to follow the oxidation-reduction reaction of solid magnesium metal and an aqueous solution of copper (II) chloride (CuCl2), both (more)

Mannard, Moira

2014-01-01T23:59:59.000Z

156

Ames Lab 101: BAM (Boron-Aluminum-Magnesium)  

SciTech Connect

Materials scientist, Bruce Cook, discusses the super hard, low friction, and lubricious alloy know as BAM (Boron-Aluminum-Magnesium). BAM was discovered by Bruce Cook and his team a

Bruce Cook

2012-08-18T23:59:59.000Z

157

Thermophysical Properties of U-10MO Alloy  

SciTech Connect

This report provides an overview of thermophysical properties of unirradiated uranium alloyed with ten weight percent molybdenum (U 10Mo), with particular focus on those material properties needed for modeling of new fuels for HPRRs (High Performance Research Reactors). The report contains both historical data available in the literature on U-10Mo, as well as more recent results conducted by the Global Threat Reduction Initiative fuel development program. The main use of the report is intended as a standard U-10Mo alloy properties reference for reactor models and simulations.

A. M. Phillips; G. S. Mickum; D. E. Burkes

2010-11-01T23:59:59.000Z

158

Determination of carbon, nitrogen, and oxygen in high purity magnesium  

E-Print Network (OSTI)

DETERMINATION OF CARBON, NITROGEN, AND OXYGEN IN HIGH PURITY MAGNESIUM A Thesis by NEIL GERARD ROCHE Submitted to the Graduate College of Texas A8cM University in partial i'ulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1981 Major Subject: Chemistry DETERMINATION OF CARBON, NITROGEN, AND OXYGEN IN HIGH PURITY MAGNESIUM A Thesis by NEIL GERARD ROCHE Approved as to style and content by: E. A. Schweikert (Chairman of Committee) G. J. Bastiaans (Member) L...

Roche, Neil Gerard

2012-06-07T23:59:59.000Z

159

Deuterium depletion and magnesium enhancement in the local disc  

E-Print Network (OSTI)

The local disc deuter is known to be depleted in comparison to the local bubble. We show, that the same lines of sight that are depleted in deuter, are enhanced in magnesium. Heavier elements - Si and Fe do not show any difference in the abundance between the local disc and the local bubble. This observation implicates that astration is responsible for both deuter depletion and magnesium enhancement.

Piotr Gnacinski

2005-07-19T23:59:59.000Z

160

THE COMPOSITION OF BRYOPHYTE COMMUNITIES ON LIMESTONE VERSUS BASALT SUBSTRATES IN COASTAL AND MID-ELEVATION FORESTS OF MO'OREA, FRENCH POLYNESIA  

E-Print Network (OSTI)

and macronutrients, like phosphorous, (Bailey 1996) which isP=0.0034). Lastly, the phosphorous concentration isin a higher pH. Finally, phosphorous levels were 3ppm higher

Wu, Jasper

2012-01-01T23:59:59.000Z

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


161

Stratigraphic variations and secondary porosity within the Maynardville Limestone in Bear Creek Valley, Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect

To evaluate groundwater and surface water contamination and migration near the Oak Ridge Y-12 plant, a Comprehensive Groundwater Monitoring Plan was developed. As part of the Maynardville exit pathways monitoring program, monitoring well clusters were ii installed perpendicular to the strike of the Maynardville Limestone, that underlies the southern part of the Y-12 Plant and Bear Creek Valley (BCV). The Maynardville Project is designed to locate potential exit pathways of groundwater, study geochemical characteristics and factors affecting the occurrence and distribution of water-bearing intervals, and provide hydrogeologic information to be used to reduce the potential impacts of contaminants entering the Maynardville Limestone.

Goldstrand, P.M. [Univ. of Nevada, Reno, NV (United States)

1995-05-01T23:59:59.000Z

162

DOE - Office of Legacy Management -- Petrolite Corp - MO 08  

Office of Legacy Management (LM)

Petrolite Corp - MO 08 Petrolite Corp - MO 08 FUSRAP Considered Sites Site: PETROLITE CORP (MO.08) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: St. Louis , Missouri MO.08-1 Evaluation Year: 1987 MO.08-4 Site Operations: Research involving test quantities of radioactive materials. MO.08-2 Site Disposition: Eliminated - Licensed - Potential for contamination remote MO.08-3 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium Flouride & Thorium Oxide MO.08-2 Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP Also see Documents Related to PETROLITE CORP MO.08-1 - Summary Paper; Title: License History for Petrolite Corporation, St. Louis (MO.8); dated 07/16/93; with three attachments (3

163

OBSERVATIONS IN REACTIVITY BETWEEN BH CONTAINING COMPOUNDS AND ORGANOMETALLIC REAGENTS: SYNTHESIS OF BORONIC ACIDS, BORONIC ESTERS, AND MAGNESIUM HYDRIDES  

E-Print Network (OSTI)

Reaction of BH 3 :THF with magnesium hydride byproduct. A.It was also observed that magnesium hydride can partiallyACIDS, BORONIC ESTERS, AND MAGNESIUM HYDRIDES A dissertation

Clary, Jacob William

2012-01-01T23:59:59.000Z

164

K-Shell Photoabsorption of Magnesium Ions  

E-Print Network (OSTI)

X-ray photoabsorption cross sections have been computed for all magnesium ions using the R-matrix method. A comparison with the other available data for Mg II- Mg X shows good qualitative agreement in general. However, for the lower ionization stages, and for singly-ionized Mg II in particular, the previous R-matrix results (Witthoeft et al. 2009; Witthoeft et al. 2011) overestimate the K-edge position due to the absence of important orbital relaxation effects in those earlier calculations, and a global shift downward in photon energy of those cross sections is therefore warranted. The resultant resonance shapes are found to be quite similar between the two R-matrix results, on the other hand. The cross sections for Mg I and Mg II are further complicated by the M-shell (n=3) occupancy. As a result, the treatment of spectator Auger decay of 1s-> np resonances using the multichannel quantum defect, optical potential method becomes problematic, and it was necessary to implement an alternative, approximate treatm...

Hasoglu, M F; Gorczyca, T W

2013-01-01T23:59:59.000Z

165

Influence of Limestone Addition in a 10 kWth Chemical-Looping Combustion Unit Operated with Petcoke  

Science Journals Connector (OSTI)

Influence of Limestone Addition in a 10 kWth Chemical-Looping Combustion Unit Operated with Petcoke ... The fuel fed was a petcoke, and the gasifying agent was steam. ... (14) To date, continuous testing with ilmenite as an oxygen carrier has been performed with a Mexican petcoke,(15, 16) South African coal,(17) and Colombian bituminous coal. ...

Ana Cuadrat; Carl Linderholm; Alberto Abad; Anders Lyngfelt; Juan Adnez

2011-08-29T23:59:59.000Z

166

Strontium and carbon isotope stratigraphy of the Late Jurassic shallow marine limestone in western Palaeo-Pacific, northwest Borneo  

E-Print Network (OSTI)

Strontium and carbon isotope stratigraphy of the Late Jurassic shallow marine limestone in western-Pacific a b s t r a c t Strontium and carbon isotope stratigraphy was applied to a 202 m-thick shallow marine, which was deposited in the western Palaeo-Pacific. Strontium isotopic ratios of rudist specimens suggest

Gilli, Adrian

167

The Mississippian Leadville Limestone Exploration Play, Utah and Colorado-Exploration Techniques and Studies for Independents  

SciTech Connect

The Mississippian (late Kinderhookian to early Meramecian) Leadville Limestone is a shallow, open-marine, carbonate-shelf deposit. The Leadville has produced over 53 million barrels (8.4 million m{sup 3}) of oil/condensate from seven fields in the Paradox fold and fault belt of the Paradox Basin, Utah and Colorado. The environmentally sensitive, 7500-square-mile (19,400 km{sup 2}) area that makes up the fold and fault belt is relatively unexplored. Only independent producers operate and continue to hunt for Leadville oil targets in the region. The overall goal of this study is to assist these independents by (1) developing and demonstrating techniques and exploration methods never tried on the Leadville Limestone, (2) targeting areas for exploration, (3) increasing deliverability from new and old Leadville fields through detailed reservoir characterization, (4) reducing exploration costs and risk especially in environmentally sensitive areas, and (5) adding new oil discoveries and reserves. The final results will hopefully reduce exploration costs and risks, especially in environmentally sensitive areas, and add new oil discoveries and reserves. The study consists of three sections: (1) description of lithofacies and diagenetic history of the Leadville at Lisbon field, San Juan County, Utah, (2) methodology and results of a surface geochemical survey conducted over the Lisbon and Lightning Draw Southeast fields (and areas in between) and identification of oil-prone areas using epifluorescence in well cuttings from regional wells, and (3) determination of regional lithofacies, description of modern and outcrop depositional analogs, and estimation of potential oil migration directions (evaluating the middle Paleozoic hydrodynamic pressure regime and water chemistry). Leadville lithofacies at Libon field include open marine (crinoidal banks or shoals and Waulsortian-type buildups), oolitic and peloid shoals, and middle shelf. Rock units with open-marine and restricted-marine facies constitute a significant reservoir potential, having both effective porosity and permeability when dissolution of skeletal grains, followed by dolomitization, has occurred. Two major types of diagenetic dolomite are observed in the Leadville Limestone at Lisbon field: (1) tight 'early' dolomite consisting of very fine grained (<5 {micro}m), interlocking crystals that faithfully preserve depositional fabrics; and (2) porous, coarser (>100-250 {micro}m), rhombic and saddle crystals that discordantly replace limestone and earlier very fine grained dolomite. Predating or concomitant with late dolomite formation are pervasive leaching episodes that produced vugs and extensive microporosity. Most reservoir rocks within Lisbon field appear to be associated with the second, late type of dolomitization and associated leaching events. Other diagenetic products include pyrobitumen, syntaxial cement, sulfide minerals, anhydrite cement and replacement, and late macrocalcite. Fracturing (solution enlarged) and brecciation (autobrecciation) caused by hydrofracturing are widespread within Lisbon field. Sediment-filled cavities, related to karstification of the exposed Leadville, are present in the upper third of the formation. Pyrobitumen and sulfide minerals appear to coat most crystal faces of the rhombic and saddle dolomites. The fluid inclusion and mineral relationships suggest the following sequence of events: (1) dolomite precipitation, (2) anhydrite deposition, (3) anhydrite dissolution and quartz precipitation, (4) dolomite dissolution and late calcite precipitation, (5) trapping of a mobile oil phase, and (6) formation of bitumen. Fluid inclusions in calcite and dolomite display variable liquid to vapor ratios suggesting reequilibration at elevated temperatures (50 C). Fluid salinities exceed 10 weight percent NaCl equivalent. Low ice melting temperatures of quartz- and calcite-hosted inclusions suggest chemically complex Ca-Mg-bearing brines associated with evaporite deposits were responsible for mineral deposition. The overall conclusion from th

Thomas Chidsey

2008-09-30T23:59:59.000Z

168

Laboratory Investigations in Support of Dioxide-Limestone Sequestration in the Ocean  

SciTech Connect

Research under this Project has proven that liquid carbon dioxide can be emulsified in water by using very fine particles as emulsion stabilizers. Hydrophilic particles stabilize a CO{sub 2}-in-H{sub 2}O (C/W) emulsion; hydrophobic particles stabilize a H{sub 2}O-in-CO{sub 2} (W/C) emulsion. The C/W emulsion consists of tiny CO{sub 2} droplets coated with hydrophilic particles dispersed in water. The W/C emulsion consists of tiny H{sub 2}O droplets coated with hydrophobic particles dispersed in liquid carbon dioxide. The coated droplets are called globules. The emulsions could be used for deep ocean sequestration of CO{sub 2}. Liquid CO{sub 2} is sparsely soluble in water, and is less dense than seawater. If neat, liquid CO{sub 2} were injected in the deep ocean, it is likely that the dispersed CO{sub 2} droplets would buoy upward and flash into vapor before the droplets dissolve in seawater. The resulting vapor bubbles would re-emerge into the atmosphere. On the other hand, the emulsion is denser than seawater, hence the emulsion plume would sink toward greater depth from the injection point. For ocean sequestration a C/W emulsion appears to be most practical using limestone (CaCO{sub 3}) particles of a few to ten ?m diameter as stabilizing agents. A mix of one volume of liquid CO{sub 2} with two volumes of H{sub 2}O, plus 0.5 weight of pulverized limestone per weight of liquid CO{sub 2} forms a stable emulsion with density 1087 kg m{sup -3}. Ambient seawater at 500 m depth has a density of approximately 1026 kg m{sup -3}, so the emulsion plume would sink by gravity while entraining ambient seawater till density equilibrium is reached. Limestone is abundant world-wide, and is relatively cheap. Furthermore, upon disintegration of the emulsion the CaCO{sub 3} particles would partially buffer the carbonic acid that forms when CO{sub 2} dissolves in seawater, alleviating some of the concerns of discharging CO{sub 2} in the deep ocean. Laboratory experiments showed that the CaCO{sub 3} emulsion is slightly alkaline, not acidic. We tested the release of the CO{sub 2}-in-H{sub 2}O emulsion stabilized by pulverized limestone in the DOE National Energy Technology Laboratory High Pressure Water Tunnel Facility (HPWTF). Digital photographs showed the sinking globules in the HPWTF, confirming the concept of releasing the emulsion in the deep ocean. We modeled the release of an emulsion from the CO{sub 2} output of a 1000 MW coal-fired power plant at 500 m depth. The emulsion would typically sink several hundred meters before density equilibration with ambient seawater. The CO{sub 2} globules would rain out from the equilibrated plume toward the ocean bottom where they would disintegrate due to wave action and bottom friction. Conceptual release systems are described both for an open ocean release and a sloping seabed release of the emulsion.

Dan Golomb; Eugene Barry; David Ryan; Stephen Pennell; Carl Lawton; Peter Swett; Devinder Arora; John Hannon; Michael Woods; Huishan Duan; Tom Lawlor

2008-09-30T23:59:59.000Z

169

The effects of a marginal intake of magnesium with soy protein concentrate on growth, gestation, and lactation in the rat  

E-Print Network (OSTI)

) The factors that regulate the intestinal absorption of magnesium are poorly understood. In humans, magnesium is absorbed mainly in the jejunum and the ileum and through an active transport mechanism (9). The level of intake of magnesium rnfluences its... of magnesium (7) Homeostatic controls have been reported to maintarn magnesium balance by renal and to a lesser degree by gastrointestinal mechanisms (8, 9). When the intake of magnesium is decreased, the urinary excretion decreases. However...

McLaughlin, Cynthia Anne

2012-06-07T23:59:59.000Z

170

In situ vitrification of Oak Ridge National Laboratory soil and limestone  

SciTech Connect

Process feasibility studies were successfully performed on two different developmental scales to determine the technical application of in situ vitrification (ISV) to Oak Ridge National Laboratory (ORNL) intermediate-level waste. In the laboratory, testing was performed on crucibles containing quantities of 50% ORNL soil and 50% ORNL limestone. In the engineering-scale testing, a 1/12-scaled simulation of ORNL Trench 7 was constructed and vitrified, resulting in waste product soil and limestone concentrations of 68% and 32%, respectively. Results from the two scales of testing indicate that the ORNL intermediate-level waste sites may be successfully processed by ISV; the waste form will retain significant quantities of the cesium and strontium. Because /sup 137/Cs is the major component of the radionuclide inventory in the ORNL seepage pits and trenches, final field process decontamination factors (i.e., off gas at the ground surface relative to the waste inventory) of 10/sup 4/ are desired to minimize activity buildup in the off-gas system. These values were realized during the engineering-scale test for both cesium and strontium. The vitrified material effectively contained 99.996% of the cesium and strontium placed in the engineering-scale test. This is equivalent to decontamination factors of greater than 10/sup 4/. Volume reduction for the engineering-scale test was 60%. No migration of the cesium to the uncontaminated surrounding soil was detected. These favorable results indicate that, once verified in a pilot-scale test, an adequately designed ISV system could be produced to treat the ORNL seepage pits and trenches without excessive activity accumulation in the off-gas treatment system.

Carter, J.G.; Bates, S.O.; Maupin, G.D.

1987-03-01T23:59:59.000Z

171

Levels of magnesium compounds of different solubility in predominant soil types in Lithuania, effects on agricultural plants.  

E-Print Network (OSTI)

??In Europe the views on the demand of magnesium by agricultural plants as well as on the need for magnesium fertilization are different. In European (more)

Rutkauskien?, Rasa

2013-01-01T23:59:59.000Z

172

Magnesium isotopic systematics of chondrules and CAIs from Allende, Murchison, Murray and Bjurbole. F.-, M. Wadhwa1,  

E-Print Network (OSTI)

Magnesium isotopic systematics of chondrules and CAIs from Allende, Murchison, Murray and Bjurbole: Magnesium isotopic analyses were performed at the Isotope Geochemistry Labora- tory of the Field Museum

Grossman, Lawrence

173

Selective Aerobic Oxidation of 5-Hydroxymethylfurfural in Water Over Solid Ruthenium Hydroxide Catalysts with Magnesium-Based Supports  

Science Journals Connector (OSTI)

Solid catalyst systems comprised of ruthenium hydroxide supported on magnesium-based carrier materials (spinel, magnesium oxide and hydrotalcite) were investigated for the selective, aqueous aerobic oxidation of ...

Yury Y. Gorbanev; Sren Kegns; Anders Riisager

2011-12-01T23:59:59.000Z

174

Changes in Perforation-Induced Formation Damage With Degree of Underbalance: Comparison of Sandstone and Limestone Formations  

SciTech Connect

Field data and recently developed models provide some guidance for estimating the underbalance needed to obtain fully functional perforations, but there are little data available that relate flow efficiency to lower underbalances in different rock types. To improve understanding of the surge cleanup process, we have performed two series of perforation flow tests in Berea Sandstone and in Bedford Limestone cores at increasing levels of underbalance. Flow tests were performed according to modified API RP43, section 4 test procedures. At the conclusion of the tests, the cores were analyzed using high-resolution X-ray CT techniques. The shape, dimensions and total volumes of both the open tunnel and the remaining embedded liner metal were extracted from the CT data and correlated with the underbalance and with the flow test results. Open tunnel diameters and volumes are much lower in the limestone samples. While the amount of metal remaining in the tunnel and at the perforation tip decreases dramatically with underbalance in Berea Sandstone cores, the amount of metal is nearly constant in the limestone cores. Conversely, the tunnel volume increases with underbalance in the Sandstone cores but stays constant in the limestone. Core flow efficiency results correlate with these observations. There is a sharp increase in CFE in the sandstone samples as the tunnel volumes increase and little change in CFE in the limestone samples corresponding to unchanging tunnel volume. The tests also offer some evidence of the cleanup mechanism at the perforation tip, at least in the sandstone cores. Samples at intermediate underbalance levels show evidence of open tunnel space in an annulus surrounding the metal slug at the tip. This suggests that cleanup may proceed at least partially by axial flow through crushed rock surrounding the metal. As this material erodes away, the metal is loosened and is flushed from the tunnel. Existing models for cleanup are based primarily on radial flow.

Detwiler, R; Halleck, P M; Karacan, C O; Hardesty, J

2003-10-22T23:59:59.000Z

175

Switchable Mirrors Based on Nickel-Magnesium Films  

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

Switchable Mirrors Based on Nickel-Magnesium Films Switchable Mirrors Based on Nickel-Magnesium Films Title Switchable Mirrors Based on Nickel-Magnesium Films Publication Type Journal Article LBNL Report Number LBNL-47180 Year of Publication 2001 Authors Richardson, Thomas J., Jonathan L. Slack, Robert D. Armitage, Robert Kostecki, Baker Farangis, and Michael D. Rubin Journal Applied Physics Letters Volume 78 Pagination 3047 Call Number LBNL-47180 Abstract An electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported. Thin, magnesium-rich Ni-Mg films prepared on glass substrates by cosputtering from Ni and Mg targets are mirror-like in appearance and have low visible transmittance. Upon exposure to hydrogen gas or on cathodic polarization in alkaline electrolyte, the films take up hydrogen and become transparent. When hydrogen is removed, the mirror properties are recovered. The transition is believed to result from reversible formation of Mg2NiH4 and MgH2. A thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction, and to protect the metal surface against oxidation.

176

Development of High-Volume Warm Forming of Low-Cost Magnesium...  

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

2 - Development of High Volume Warm Forming of Low Cost Magnesium Sheet edm2@chrysler.com February 28, 2008 Development of High-Volume Warm Forming of Low- Cost Magnesium Sheet...

177

Development of High-Volume Warm Forming of Low-Cost Magnesium...  

Energy Savers (EERE)

Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet 2010 DOE Vehicle Technologies and Hydrogen...

178

Magnesium and memantine do not inhibit nociceptive neuronal activity in the trigeminocervical complex of the rat  

Science Journals Connector (OSTI)

Experimental studies with NMDA receptor antagonists, such as magnesium and memantine, have demonstrated the ability of these substances ... using the open channel blockers, magnesium and memantine, we studied the...

J Hoffmann; JW Park; RJ Storer; PJ Goadsby

2013-02-01T23:59:59.000Z

179

E-Print Network 3.0 - alumina-rich magnesium aluminate Sample...  

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

(3 pm... , but no evidence of evaporative loss is seen. The inclusion has a Group II REE pattern and a normal magnesium... ) and SYLVESTER etal. ( 1993). Magnesium, Al, Ti, Mn....

180

Planned Emplacement of Magnesium Oxide in the WIPP Repository 1.0 Overview  

E-Print Network (OSTI)

Planned Emplacement of Magnesium Oxide in the WIPP Repository 1.0 Overview In December 2002 received approval to dispose of AMWTF's supercompacted waste provided magnesium oxide (MgO), the approved

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


181

Thermal Conductivity of Ordered Mesoporous Nanocrystalline Silicon Thin Films Made from Magnesium Reduction of Polymer-  

E-Print Network (OSTI)

Thermal Conductivity of Ordered Mesoporous Nanocrystalline Silicon Thin Films Made from Magnesium-assembly of mesoporous silica followed by magnesium reduction. The periodic ordering of pores in mesoporous silicon

Pilon, Laurent

182

Development of High-Volume Warm Forming of Low-Cost Magnesium...  

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

Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet Development of High-Volume Warm Forming of Low-Cost Magnesium Sheet Presentation from the U.S. DOE Office of...

183

Magnesium-rich crustal compositions on Mercury: Implications for magmatism from petrologic modeling  

E-Print Network (OSTI)

Magnesium-rich crustal compositions on Mercury: Implications for magmatism from petrologic modeling: Stockstill-Cahill, K. R., T. J. McCoy, L. R. Nittler, S. Z. Weider, and S. A. Hauck II (2012), Magnesium

Hauck II, Steven A.

184

Magnesium Silicate Dissolution Investigated by 29Si MAS, 1H-29Si...  

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

Magnesium Silicate Dissolution Investigated by 29Si MAS, 1H-29Si CP MAS, 25Mg QCPMG, and 1H-25Mg CP QCPMG NMR. Magnesium Silicate Dissolution Investigated by 29Si MAS, 1H-29Si CP...

185

The Kinetics and Magnesium Requirements for the Folding of Antigenomic Ribozymes  

E-Print Network (OSTI)

The Kinetics and Magnesium Requirements for the Folding of Antigenomic Ribozymes Sirinart of antigenomic ri- bozyme was studied, it is demonstrated that its L3 loop requires magnesium and, apparently

Perreault, Jean-Pierre

186

Nondestructive evaluation of an environmentally friendly conversion coating for magnesium alloys using optical measurement techniques  

E-Print Network (OSTI)

Magnesium alloys have one of the highest specific strengths of all construction metals used. Specifically, magnesium alloy castings are used in the aerospace industry to reduce the weight of aerospace vehicles. Coating systems must be employed...

Zuniga, David

2006-10-30T23:59:59.000Z

187

E-Print Network 3.0 - az91d magnesium alloy Sample Search Results  

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

alloy Search Powered by Explorit Topic List Advanced Search Sample search results for: az91d magnesium alloy...

188

E-Print Network 3.0 - az31 magnesium alloy Sample Search Results  

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

alloy Search Powered by Explorit Topic List Advanced Search Sample search results for: az31 magnesium alloy...

189

E-Print Network 3.0 - az91d magnesium alloys Sample Search Results  

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

alloys Search Powered by Explorit Topic List Advanced Search Sample search results for: az91d magnesium alloys...

190

E-Print Network 3.0 - az31 magnesium alloys Sample Search Results  

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

alloys Search Powered by Explorit Topic List Advanced Search Sample search results for: az31 magnesium alloys...

191

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS  

Office of Legacy Management (LM)

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO October 27, 1989 Prepared for: U.S. Department of Energy Formerly Utilized Sites Remedial Action Program Prepared by: R.F. Weston/Office of Technical Services BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO INTRODUCTION The Department of Energy (DOE) is conducting a program to identify and examine the radiological conditions at sites used in the early years of nuclear energy development by the U.S. Army Corps of Engineer's Manhattan Engineer District (MED) and the Atomic Energy Commission (AEC). This program, the Formerly Utilized Sites Remedial Action Program (FUSRAP), is administered by the Assistant Secretary for Nuclear Energy through the

192

On the Modeling of Plastic Deformation of Magnesium Alloys  

SciTech Connect

Magnesium alloys are promising materials due to their low density and therefore high specific strength. However, the industrial application is not well established so far, especially for wrought products such as sheets or profiles. Due to its hexagonal crystallographic structure, deformation mechanisms observed in magnesium alloys are rather different from those in face centered cubic metals such as aluminum alloys. This leads not only to a mechanical anisotropy, but also to a tension-compression asymmetry, i.e. unequal compressive and tensile yield strength. The resulting complexity in the yielding behavior of such materials cannot be captured by conventional models of J2 plasticity. Cazacu and Barlat, therefore, proposed a phenomenological yield potential which accounts for the respective phenomena by introducing the third invariant of the stress tensor. Simulations based on this model are performed with ABAQUS/Explicit and a user defined routine VUMAT for validating the respective implementation. The application aims at simulating the extrusion process of magnesium alloys.

Ertuerk, S.; Steglich, D.; Bohlen, J.; Letzig, D.; Brocks, W. [GKSS Research Center, Institute of Materials Research, Max-Plank-Str., D-21502 Geesthacht (Germany)

2007-05-17T23:59:59.000Z

193

Nanostructured material for advanced energy storage : magnesium battery cathode development.  

SciTech Connect

Magnesium batteries are alternatives to the use of lithium ion and nickel metal hydride secondary batteries due to magnesium's abundance, safety of operation, and lower toxicity of disposal. The divalency of the magnesium ion and its chemistry poses some difficulties for its general and industrial use. This work developed a continuous and fibrous nanoscale network of the cathode material through the use of electrospinning with the goal of enhancing performance and reactivity of the battery. The system was characterized and preliminary tests were performed on the constructed battery cells. We were successful in building and testing a series of electrochemical systems that demonstrated good cyclability maintaining 60-70% of discharge capacity after more than 50 charge-discharge cycles.

Sigmund, Wolfgang M. (University of Florida, Gainesville, FL); Woan, Karran V. (University of Florida, Gainesville, FL); Bell, Nelson Simmons

2010-11-01T23:59:59.000Z

194

Friction Tests in Magnesium Tube Hydroforming at Elevated Temperatures  

SciTech Connect

In metal forming, lubricants have a variety of functions. The top priority is usually reduction of friction in order to increase the formability of the materials and reduce tool wear. Because magnesium alloys have very poor formability at room temperature, it is essential to manufacture a part from Magnesium alloys at elevated temperatures. The aim of this paper is to present a friction test method to evaluate the performance of different kinds of lubricants and determine their coefficients of friction at elevated temperatures in tube hydroforming of magnesium alloys. A self-designed experimental apparatus is used to carry out the experiments of friction tests. The coefficient of friction between the tube and die at guiding zone is determined. The effects of the internal pressure, the axial feeding velocity and temperatures on the friction forces and coefficients of friction for different lubricants are discussed.

Hwang, Yeong-Maw; Wang, Kuo-Hsing; Kuo, Tsung-Yu [National Sun Yat-Sen University-Department of Mechanical and Electro-mechanical Engineering, No.70, Lien-Hai Rd., Kaohsiung, Taiwan (China)

2011-05-04T23:59:59.000Z

195

Chemical Preparation of Pure and Strontium-and/or Magnesium-Doped Lanthanum Gallate Powders  

E-Print Network (OSTI)

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

Tas, A. Cuneyt

196

Magnesium and titanium: "The odd couple" Local order and the influence of stress on the  

E-Print Network (OSTI)

Magnesium and titanium: "The odd couple" Local order and the influence of stress on the hydrogen (Sweden) Cover: The graph on the cover is a collection of loading isotherms measured on magnesium thin UNIVERSITEIT Magnesium and titanium: "The odd couple" Local order and the influence of stress on the hydrogen

Dam, Bernard

197

Magnesium metabolism in growing pigs A. POINTILLART, Michle ESTABLIER Nicole FONTAINE,  

E-Print Network (OSTI)

Magnesium metabolism in growing pigs A. POINTILLART, Michèle ESTABLIER Nicole FONTAINE, Colette meal) and semi- synthetic (casein and starch) diets with various levels of calcium, magnesium, the faecal and urinary excretion as well as the absorption and retention of magnesium depended on the dietary

Paris-Sud XI, Université de

198

MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. , M. Gounelle1  

E-Print Network (OSTI)

MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. Mimoun1 , M. Gounelle1. Introduction: The magnesium isotopic composi- tion of primitive extraterrestrial materials is worth measuring.g. 10]. Figure 1: The magnesium isotopic composition of CAIs in CR chondrites. Error bars are 1

Technische Universiteit Delft

199

Mass Flow Control in a Magnesium Hall-effect Thruster Mark A. Hopkins*  

E-Print Network (OSTI)

Mass Flow Control in a Magnesium Hall-effect Thruster Mark A. Hopkins* , Jason M. Makela , Robert L reported in this paper examined methods of operating a Hall-effect thruster on solid magnesium propellant University began performing experiments using magnesium and zinc as propellants for a Hall-effect thruster1

King, Lyon B.

200

The effect of cooling rate on thermophysical properties of magnesium alloys  

E-Print Network (OSTI)

ARTICLES The effect of cooling rate on thermophysical properties of magnesium alloys M.N. Khan magnesium alloys (AZ91D, AM60B, and AE44) have been studied. Phase-transformation temperatures and enthalpy behavior of magnesium alloys, but the effect of cooling rate on phase-transformation temperatures

Medraj, Mamoun

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


201

IEEE TRANSACTIONS ON MAGNETICS, VOL. 47, NO. 6, JUNE 2011 1545 Spin Injection Into Magnesium Nanowire  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON MAGNETICS, VOL. 47, NO. 6, JUNE 2011 1545 Spin Injection Into Magnesium and Technology Beijing, Beijing 100083, China Spin injection into magnesium from Permalloy is performed nanowires. The short spin diffusion length of magnesium which has a small spin-orbit interaction can

Otani, Yoshichika

202

RNA-Magnesium-Protein Interactions in Large Ribosomal Subunit Anton S. Petrov,,  

E-Print Network (OSTI)

RNA-Magnesium-Protein Interactions in Large Ribosomal Subunit Anton S. Petrov,,§ Chad R. Bernier of Technology, Atlanta, Georgia 30332, United States ABSTRACT: Some of the magnesium ions in the ribosome are coordinated by multiple rRNA phosphate groups. These magnesium ions link distal sequences of rRNA, primarily

Williams, Loren

203

X-ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin Films  

E-Print Network (OSTI)

X-ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin Films T. J. Richardsona@lbl.gov Abstract Mixed metal thin films containing magnesium and a first-row transition element exhibit very large and coordination of the magnesium and transition metal atoms during hydrogen absorption were studied using dynamic

204

The Effect of Magnesium Coordination on the and "N Magnetic Resonance Spectra of Chlorophyll a.  

E-Print Network (OSTI)

7058 The Effect of Magnesium Coordination on the and "N Magnetic Resonance Spectra of Chlorophyll a magnesium-free derivative pheophytin a have been assigned. Emphasis is placed on the quaternary carbon atoms was developed to permit these assign- ments. On complexation with magnesium, large downfield chemical

Boxer, Steven G.

205

In vitro corrosion and biocompatibility of binary magnesium alloys Xuenan Gu a  

E-Print Network (OSTI)

In vitro corrosion and biocompatibility of binary magnesium alloys Xuenan Gu a , Yufeng Zheng a 2 September 2008 Accepted 21 October 2008 Available online 9 November 2008 Keywords: Magnesium alloy Corrosion In vitro Cytotoxicity Hemocompatibility a b s t r a c t As bioabsorbable materials, magnesium

Zheng, Yufeng

206

Ordered magnesium-lithium alloys: First-principles predictions Richard H. Taylor  

E-Print Network (OSTI)

Ordered magnesium-lithium alloys: First-principles predictions Richard H. Taylor Department 2010 Magnesium-lithium Mg-Li alloys are among the lightest structural materials. Although considerable Emerging technologies increasingly depend on the pro- duction of ultralight-weight materials. Magnesium

Hart, Gus

207

Mineral bone composition and some elements of calcium metabolism in magnesium-deficient growing rats  

E-Print Network (OSTI)

Mineral bone composition and some elements of calcium metabolism in magnesium-deficient growing-Chomponelle, Theix, 63110 Beaumont, France. Summary. (1) Magnesium deficiency was induced in Sprague-Dawley male rats of deprivation. (3) The leg bones were fragmented as shown in figure 1. Their magnesium content had decreased

Paris-Sud XI, Université de

208

MAGNESIUM ABSORPTION IN THE CCUM OF RATS RELATED TO VOLATILE FATTY ACIDS PRODUCTION  

E-Print Network (OSTI)

MAGNESIUM ABSORPTION IN THE C?CUM OF RATS RELATED TO VOLATILE FATTY ACIDS PRODUCTION Y. RAYSSIGUIER RELATIONS ENTRE L'ABSORPTION C,4ECALE DE MAGNESIUM CHEZ LE RAT ET LA PRODUCTION D'ACIDES GRAS VOLATILS du caecum, pH, acides gras volatils, activité microbienne. Introduction The mode of magnesium

Paris-Sud XI, Université de

209

PITTING CORROSION ON MAGNESIUM ALLOYS : A COMPARATIVE STUDY OF FIELD DATA USING EXTREME VALUE  

E-Print Network (OSTI)

PITTING CORROSION ON MAGNESIUM ALLOYS : A COMPARATIVE STUDY OF FIELD DATA USING EXTREME VALUE corrosion of the magnesium alloys AZ91D and AM60B combined with different coatings on steel bolts was investigated in field corrosion tests carried out by Volvo Car Corporation. Light metals like magnesium

Maume-Deschamps, Véronique

210

Effects of Magnesium on Inactivation of the Voltage-gated Calcium Current in  

E-Print Network (OSTI)

Effects of Magnesium on Inactivation of the Voltage-gated Calcium Current in Cardiac Myocytes H-dependent inactivation can be modulated by changes in cytoplasmic Mg~+. INTRODUCTION Magnesium is an important constituent of the intracellular milieu. Despite the importance of magnesium as an essential cofactor

211

Minerals to Dairy Cows with Focus on Calcium and Magnesium Balance  

E-Print Network (OSTI)

Minerals to Dairy Cows with Focus on Calcium and Magnesium Balance Cecilia Kronqvist Faculty;Minerals to Dairy Cows with Focus on Calcium and Magnesium Balance Abstract Both clinical and subclinical deficiency of calcium and magnesium may cause problems in dairy cows. Clinical hypocalcaemia most commonly

212

SIMULATION OF POROSITY AND HOT TEARS IN A SQUEEZE CAST MAGNESIUM CONTROL ARM  

E-Print Network (OSTI)

SIMULATION OF POROSITY AND HOT TEARS IN A SQUEEZE CAST MAGNESIUM CONTROL ARM K.D. Carlson1 , C: Magnesium Alloys, Casting, Shrinkage Porosity, Hot Tears, Modeling Abstract Simulations are performed and hot tears in squeeze casting of magnesium alloys. Introduction Both shrinkage porosity and hot tears

Beckermann, Christoph

213

Effects of magnesium ions on the stabilization of RNA oligomers of defined structures  

E-Print Network (OSTI)

Effects of magnesium ions on the stabilization of RNA oligomers of defined structures MARTIN J as a function of magnesium ion concentration. The oligomers included helices composed of Watson­Crick base pairs could best be interpreted as nonspecific binding of metal ions to the RNAs. The effect of magnesium ions

Westhof, Eric

214

Serum proteins in magnesium-deficient rat Y. RAYSSIGUIER P. LARVOR Y. AUGUSTI J. DURLACH  

E-Print Network (OSTI)

Serum proteins in magnesium-deficient rat Y. RAYSSIGUIER P. LARVOR Y. AUGUSTI J. DURLACH (1 Cochin, Paris Summary. Hypoproteinemia appears early in the magnesium-deficient rat with a drop in serum. In the magnesium-deficient rat, we have shown serum protein modifications related to immunologic and allergic

Paris-Sud XI, Université de

215

Charge-exchange collisions in interpenetrating laser-produced magnesium plasmas  

E-Print Network (OSTI)

Charge-exchange collisions in interpenetrating laser-produced magnesium plasmas S.S. HARILAL,1 C charge-exchange collisions between highly charged Mg ions in colliding laser-produced magnesium plasmas magnesium plasmas. 1. INTRODUCTION Several applications of laser-produced plasmas involve an experimental

Harilal, S. S.

216

Novel Magnesium Alloys Developed for Biomedical Application: A Review Nan Li, Yufeng Zheng*  

E-Print Network (OSTI)

Novel Magnesium Alloys Developed for Biomedical Application: A Review Nan Li, Yufeng Zheng* State in the development of magnesium alloys both for industrial and biomedical applications. Industrial interest in magnesium alloys is based on strong demand of weight reduction of transportation vehicles for better fuel

Zheng, Yufeng

217

MAGNESIUM AND ZINC BLOOD LEVELS IN MICE SENSITIVE TO AUDIOGENIC SEIZURES  

E-Print Network (OSTI)

MAGNESIUM AND ZINC BLOOD LEVELS IN MICE SENSITIVE TO AUDIOGENIC SEIZURES J.G. HENROTTE G. FRANCK., 1973 ; Durlach, 1976). Thus, it seemed of interest to study the zinc and magnesium levels in the blood the animals contained 2 % of a mineral mixture composed of magnesium hydroxide (13.8 %), Ca diphosphate (70

Paris-Sud XI, Université de

218

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys  

E-Print Network (OSTI)

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys M.G. POKORNY, C.A. MONROE properties that are suitable for advanced stress modeling is even more limited for magnesium alloys. Recently of an AZ91 magnesium alloy in order to predict hot tears.[4] This study relied on crude estimates

Beckermann, Christoph

219

Surface Analysis of Silica Gel Particles after Mechanical Dry Coating with Magnesium Stearate  

E-Print Network (OSTI)

1 Surface Analysis of Silica Gel Particles after Mechanical Dry Coating with Magnesium Stearate particles (d50 = 55 µm) by coating with different mass ratios of magnesium stearate - MgSt2 (d50 = 4.6 µm Group). Keywords: AFM phase imaging, adhesion force, dry coating, silica, magnesium stearate. 1

Paris-Sud XI, Université de

220

Does Magnesium Transport Protein (MgtE) Contribute to the Antibiotic Resistance of Pseudomonas aeruginosa?  

E-Print Network (OSTI)

Does Magnesium Transport Protein (MgtE) Contribute to the Antibiotic Resistance of Pseudomonas is more resistant to antibiotics. The purpose of this project was to find out if the magnesium transport by using two different strains of P.aeruginosa; PA14 wild-type and GGA52 mutant (without the magnesium

Zhou, Yaoqi

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


221

Reliability of Laser Welding Process for ZE41A-T5 Magnesium Alloy Sand Castings  

E-Print Network (OSTI)

Reliability of Laser Welding Process for ZE41A-T5 Magnesium Alloy Sand Castings Haider Al-Kazzaz1 for magnesium alloys. The process reliability of 2-mm ZE41A-T5 butt joints welded by a 4 kW Nd:YAG laser, reproducibility, Weibull distribution 1. Introduction The applications of magnesium alloys are expanding rapidly

Medraj, Mamoun

222

Evaluation of microstructural eects on corrosion behaviour of AZ91D magnesium  

E-Print Network (OSTI)

Evaluation of microstructural eects on corrosion behaviour of AZ91D magnesium alloy Rajan Ambat(OH)2 with small amounts b phase, magnesium-aluminium oxide and MgH2 while for die-cast, the product: Magnesium alloys; AZ91D; Ingot; Die-cast; Microstructure; Corrosion 0010-938X/00/$ - see front matter 7 2000

Zhou, Wei

223

Above-threshold ionization near the 3p4d 1 autoionizing state in magnesium  

E-Print Network (OSTI)

Above-threshold ionization near the 3p4d 1 Fo autoionizing state in magnesium A. Reber,1 T. Baynard ionization of magnesium from the 3 1 P state in the region of the 3p4d 1 Fo autoionizing resonance, in which of magnesium atoms just inside the focus of a magnetic bottle spectrometer MBS 13 . One laser is tuned

Berry, R. Stephen

224

Inhibition of the ATPase activity of Escherichia coli ATP synthase by magnesium fluoride  

E-Print Network (OSTI)

Inhibition of the ATPase activity of Escherichia coli ATP synthase by magnesium fluoride Zulfiqar activity of Escherichia coli ATP synthase by magnesium fluoride (MgFx) was studied. Wild-type F1-ATPase synthesis mechanism; Magnesium fluoride; ATPase inhibition; Transition state analog 1. Introduction ATP

Zulfiqar Ahmad

225

Critical Role of Magnesium Ions in DNA Polymerase 's Closing and Active Site Assembly  

E-Print Network (OSTI)

Critical Role of Magnesium Ions in DNA Polymerase 's Closing and Active Site Assembly Linjing Yang nucleotide with conserved catalytic residues (Asp190, Asp192, Asp256) and the two functional magnesium ions adjustments of the nucleotide-binding and catalytic magnesium ions help guide polymerase selection

Schlick, Tamar

226

Effect of microflora and lactose on the absorption of calcium, phosphorus and magnesium  

E-Print Network (OSTI)

Effect of microflora and lactose on the absorption of calcium, phosphorus and magnesium, magnesium and phosphorus was determined in the ileum, caecum, large intestine and faeces by the mineral/Tio2 and magnesium but did have an unfavorable influence on phosphorus absorption. Lactose increased calcium

Paris-Sud XI, Université de

227

PHYSICAL REVIEW B 84, 084101 (2011) Guiding the experimental discovery of magnesium alloys  

E-Print Network (OSTI)

PHYSICAL REVIEW B 84, 084101 (2011) Guiding the experimental discovery of magnesium alloys Richard 2011; published 19 August 2011) Magnesium alloys are among the lightest structural materials known and are of considerable technological interest. To develop superior magnesium alloys, experimentalists must have

Hart, Gus

228

The influence of magnesium deficiency on calcium metabolism P. LARVOR Marie-Louise LABAT  

E-Print Network (OSTI)

The influence of magnesium deficiency on calcium metabolism in the rat P. LARVOR Marie-Louise LABAT in magnesium-deficient rats with an isotopic technique. 45Ca was injected intravenously and the blood calcium. No important change was noticed after a 10-day magnesium deficiency ; there was a significant reduction

Boyer, Edmond

229

Abstract The hammerhead ribozyme, a small catalytic RNA molecule, cleaves, in the presence of magnesium  

E-Print Network (OSTI)

of magnesium ions, a specific phosphodiester bond within its own back- bone, leading to 23-cyclic phosphate ribozyme, obtained after flash-freezing crystals soaked with magnesium. Because of a careful equilibra AMBER · Ewald summation · Sheared GA pair · Magnesium ions · Ribose pucker flip Introduction

Westhof, Eric

230

Hot cracking in tungsten inert gas welding of magnesium alloy AZ91D  

E-Print Network (OSTI)

Hot cracking in tungsten inert gas welding of magnesium alloy AZ91D W. Zhou*, T. Z. Long and C. K ductility, and the HAZ was found to be the `weakest link'. Keywords: Magnesium alloy, AZ91D, TIG welding, Hot cracking, Liquation, Fracture Introduction Magnesium alloys have high strength/weight ratio

Zhou, Wei

231

Aufbau eines Frequenz-vervierfachten Diodenlasers fr die Photoionisation von Magnesium  

E-Print Network (OSTI)

Aufbau eines Frequenz-vervierfachten Diodenlasers für die Photoionisation von Magnesium this work, the construction and implementation of a laser-system for photo- ionization of magnesium is described. Finally, spectroscopic measurements of dierent magnesium isotopes are discussed with particular

Blatt, Rainer

232

Enthalpies of formation of magnesium compounds from first-principles calculations  

E-Print Network (OSTI)

Enthalpies of formation of magnesium compounds from first-principles calculations Hui Zhang t An energetics database of binary magnesium compounds has been developed from first-principles calculations. Introduction Magnesium alloys are of great importance to the industrial world. With a density of 1.741 g/cm3

Chen, Long-Qing

233

THE RAMAN SPECTRUM OF MAGNESIUM FLUORIDE By R. S. KRISHNAN and R. S. KATIYAR,  

E-Print Network (OSTI)

627. THE RAMAN SPECTRUM OF MAGNESIUM FLUORIDE By R. S. KRISHNAN and R. S. KATIYAR, Department, NOVEMBRE 1965, I Magnesium fluoride, which occurs in nature as the mineral sellaite, crystallizes spectrum of magnesium fluoride (MgF2) taken with a medium Quartz spectrograph. (b) Its microphotometer

Paris-Sud XI, Université de

234

Magnesium Ions Enhance the Transfer of Human Papillomavirus E2 Protein from Non-specific to  

E-Print Network (OSTI)

Magnesium Ions Enhance the Transfer of Human Papillomavirus E2 Protein from Non reactions which contain an excess of non-speci®c DNA, magnesium ions enhance the binding of E2 to its speci®c sites. In contrast, in the absence of non-speci®c DNA, magnesium ions have no effect on the binding of E

Gaston, Kevin

235

MODELING THE MEAN INTERACTION FORCES BETWEEN POWDER APPLICATION TO SILICA GEL-MAGNESIUM STEARATE MIXTURES.  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

236

Magnesium Ion-dependent Activation of the RecA Protein Involves the C Terminus*  

E-Print Network (OSTI)

Magnesium Ion-dependent Activation of the RecA Protein Involves the C Terminus* Received with ATP. We provide evi- dence that the free magnesium ion is required to medi- ate a conformational at low magnesium ion concentrations. The RecA protein of Escherichia coli plays a central role

Cox, Michael M.

237

Solid-State 25Mg NMR of a Magnesium(II) Adensosine 5-Triphosphate Complex  

E-Print Network (OSTI)

Solid-State 25Mg NMR of a Magnesium(II) Adensosine 5-Triphosphate Complex Christopher V. Grant interacting with RNA, such as magnesium- (II) binding sites within ribozymes, has become a topic of intense such as magnesium(II). X-ray crystallography has been most useful at providing structural information about

Frydman, Lucio

238

Growth of magnesium oxide thin lms using single molecular precursors by metalorganic chemical vapor deposition  

E-Print Network (OSTI)

Growth of magnesium oxide thin ®lms using single molecular precursors by metal±organic chemical precursors; Silicon; Sapphire 1. Introduction Magnesium oxide (MgO) thin ®lms have attracted much attention MgO ®lms on Si(100) above 6508C by thermal CVD. Murayama and Shionoya [12] used magnesium 2

Boo, Jin-Hyo

239

The magnesium nutrition of cotton as influenced by sodium  

E-Print Network (OSTI)

1964 Major Subject. Plant Physic logy THE MAGNESIUM NUTRITION OF COTTON AS INFLUENCED BY SODIUM A Thesis By MERVYN M. THENABADU Approved as to style and content by: Chairman of Commi. e Nun Head of Department Member Mem, er Member Member... REVIEW OF LITERATURE (a) Sodium as a plant nutrient (b) I'he role of magnesium in plant nutrition MATERIALS AND METHODS RESUL:S DISCUSSION 13 21 24 (a) The effect of treatments on grcwth and reproduction (b) The effect of treatments on the ccr...

Thenabadu, Mervyn Wellesly

2012-06-07T23:59:59.000Z

240

Oxidation, Reduction, and Condensation of Alcohols over (MO3)3 (M=Mo, W) Nanoclusters  

SciTech Connect

The reactions of deuterated methanol, ethanol, 1-propanol, 1-butanol, 2-propanol, 2-butanol and t-butanol over cyclic (MO3)3 (M = Mo, W) clusters were studied experimentally with temperature programmed desorption (TPD) and theoretically with coupled cluster CCSD(T) theory and density functional theory. The reactions of two alcohols per M3O9 cluster are required to provide agreement with experiment for D2O release, dehydrogenation and dehydration. The reaction begins with the elimination of water by proton transfers and forms an intermediate dialkoxy species which can undergo further reaction. Dehydration proceeds by a ? hydrogen transfer to a terminal M=O. Dehydrogenation takes place via an ? hydrogen transfer to an adjacent MoVI = O atom or a WVI metal center with redox involved for M = Mo and no redox for M = W. The two channels have comparable activation energies. H/D exchange to produce alcohols can take place after olefin is released or via the dialkoxy species depending on the alcohol and the cluster. The Lewis acidity of the metal center with WVI being larger than MoVI results in the increased reactivity of W3O9 over Mo3O9 for dehydrogenation and dehydration.

Fang, Zongtang; Li, Zhenjun; Kelley, Matthew S.; Kay, Bruce D.; Li, Shenggang; Hennigan, Jamie M.; Rousseau, Roger J.; Dohnalek, Zdenek; Dixon, David A.

2014-10-02T23:59:59.000Z

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


241

DOE - Office of Legacy Management -- St Louis University - MO...  

Office of Legacy Management (LM)

St Louis University - MO 0-02 FUSRAP Considered Sites Site: ST. LOUIS UNIVERSITY (MO.0-02) Eliminated from consideration under FUSRAP - As of 1987 the facility operated under an...

242

Activation of the Sulfhydryl Group by Mo Centers: Kinetics of...  

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

Mo(mu-SH)Mo Complex Abstract: This paper provides evidence from kinetic experiments and electronic structure calculations of a significantly reduced S-H bond strength in the...

243

Onset of Metallic Behavior in Magnesium Clusters Owen C. Thomas, Weijun Zheng, Shoujun Xu, and Kit H. Bowen, Jr.  

E-Print Network (OSTI)

Onset of Metallic Behavior in Magnesium Clusters Owen C. Thomas, Weijun Zheng, Shoujun Xu, and Kit-selected magnesium cluster anions, Mgn ÿ , over the size range, n 3­35. Their s-p band gaps were observed to close in the finite size re- gime for the case of magnesium. Magnesium is a particu- larly instructive case because

Simons, Jack

244

Monolayer MoS2 Heterojunction Solar Cells  

Science Journals Connector (OSTI)

Monolayer MoS2 Heterojunction Solar Cells ... molybdenum disulfide; heterojunction solar cell; 2D material; monolayer; chemical vapor deposition ...

Meng-Lin Tsai; Sheng-Han Su; Jan-Kai Chang; Dung-Sheng Tsai; Chang-Hsiao Chen; Chih-I Wu; Lain-Jong Li; Lih-Juann Chen; Jr-Hau He

2014-07-21T23:59:59.000Z

245

Management of solid wastes from the Limestone Injection Dry Scrubbing (LIDS) clean coal technology. Final report  

SciTech Connect

The objectives of this project were to characterize by-products from a pilot Limestone Injection Dry Scrubbing (LIDS) process and to develop processes directed toward the safe and economic use or disposal of these wastes. Because LIDS is a developing Clean Coal technology, a database of chemical and physical characteristics of the by-product was first developed. During the course of this project, it was found that the waste alone did not form high-strength products sufficient for use in construction and engineering applications. Therefore, the project was redirected to evaluate the by-product as a soil-cement and Portland cement raw material, agricultural liming agent, backfill/landfill material component, and mine reclamation/neutralizing agent. Based on these evaluations, the most viable uses for the LIDS byproduct include use in mine reclamation or as a neutralization agent. If soluble sulfites can be minimized by avoiding a dolomitic LIDS reagent, use as an agricultural liming agent has promise. Interest from an Ohio utility in the LIDS process suggests possible application of results at the demonstration or commercial stages.

Musiol, W.F. Jr.; Czuczwa, J.M.

1993-03-01T23:59:59.000Z

246

Diagenetic features of Trenton Limestone in northern Indiana: petrographic evidence for Late (Mesogenetic) Dolostone  

SciTech Connect

Three conventional cores of the entire Trenton section were examined in detail by in-depth visual description, analysis of more than 250 thin sections, scanning electron microscopy, and x-ray diffraction. The cores are located in the northern half of Indiana where they span the major dolostone pinch-out that is the trap for the prolific Trenton oil and gas field. The Trenton Limestone is completely dolomitized in northern Indiana. Dolostone abundance decreases to the south where the dolostone is restricted to the upper few feet of the formation. Two major types of dolostone are recognized. The top 5-20 ft of the Trenton cores consists of medium crystalline nonporous xenotopic ferroan dolostone. Mesogenetic dewatering of the overlying Maquoketa shale is the proposed dolomitizing mechanisms for this ferroan dolostone cap. Below the ferroan dolostone cap in northern Indiana is coarsely crystalline dolostone, which consists of thin intercalated subfacies of porous idiotopic and nonporous xenotopic dolostone. This is the dominant dolostone type and is the reservoir in the Trenton field. The coarsely crystalline dolostone postdates the ferroan dolostone cap, chert nodule formation, and initial pressure solution. Therefore, this dolostone is considered to have formed relatively late in the diagenetic history of the Trenton under mesogenetic conditions. In the northernmost core, nearly all of the secondary dolomitic porosity is plugged by poikilotopic gypsum and minor amounts of calcite and celestite. Other diagenetic features observed in Trenton are also discussed, including silicification, ferroan calcite cement, upper Trenton contact formation, hardgrounds, and pressure solution.

Fara, D.R.

1986-08-01T23:59:59.000Z

247

Subsurface stratigraphy and depositional history of Madison Limestone (Mississippian), Williston Basin  

SciTech Connect

Cyclic carbonate-evaporite deposits of the Madison Limestone (Mississippian) in the Williston basin are made up of four main facies. From basin to shelf, the normal facies transition is from offshore deeper water (Lodgepole) facies to crinoidal-algal banks and back-bank fine carbonate, evaporite, and minor terrigenous clastic beds on the shallow shelf. Five major depositional cycles are correlated and mapped on the basis of shaley marker beds identified on gamma-ray-neutron or gamma-ray-sonic logs. The marker beds are interpreted as reworked and redistributed silt and clay-size sediments originally deposited, possibly by eolian processes, on the emergent shelf during low sea level phases of cycle development. From oldest to youngest, the first two cycles are characterized by increasing amounts of crinoidal-bioclastic and oolite-algal carbonates, culminating in the Mission Canyon facies of the middle cycle. The upper two cycles are characterized by increasing amounts of evaporite deposits, culminating in the Charles salt facies of the youngest cycle. Much of the Madison section on the south and east flanks of the basin consists of dolomite. Dolomite content decreased toward the basin center, where a major share of Madison petroleum production is located. Reservoir beds in the oil fields are primarily partially dolomitized oolite-algal or crinoidal-bioclastic bank carbonates. Most of the productive petroleum reservoirs are located in the middle cycles of the Madison.

Peterson, J.A.

1985-05-01T23:59:59.000Z

248

Molecular Mechanisms of Calcium and Magnesium Binding to Parvalbumin  

E-Print Network (OSTI)

between the coordinating residues of the EF-hand calcium binding loop of parvalbumin and the overallMolecular Mechanisms of Calcium and Magnesium Binding to Parvalbumin M. Susan Cates, Miguel L at EF loop position 12 results in a dramatically less tightly bound monodentate Ca2 coordination

Phillips, George N. Jr.

249

Hydrogenation of Magnesium Nickel Boride for Reversible Hydrogen Storage  

Science Journals Connector (OSTI)

Hydrogenation of Magnesium Nickel Boride for Reversible Hydrogen Storage ... Use of hydrogen for transportation applications requires materials that not only store hydrogen at high density but that can operate reversibly at temperatures and pressures below approximately 100 C and 10 bar, respectively. ... This composition is based on assuming the following complete hydrogenation reaction:which stores 2.6 wt % hydrogen. ...

Wen Li; John J. Vajo; Robert W. Cumberland; Ping Liu; Son-Jong Hwang; Chul Kim; Robert C. Bowman, Jr.

2009-11-06T23:59:59.000Z

250

Slow-Neutron Scattering Cross-Sections of Magnesium  

Science Journals Connector (OSTI)

... of magnesium has been measured using the arrangement shown in Fig. 1, which selects neutrons in the energy-range 0*5-1,000 eV. The number of ... in the energy-range 0*5-1,000 eV. The number of neutrons ...

P. A. EGELSTAFF; R. JACKSON

1953-08-29T23:59:59.000Z

251

Recovery and utilization of gypsum and limestone from scrubber sludge. [Quarterly] technical report, March 1, 1993--May 31, 1993  

SciTech Connect

Wet flue-gas desulfurization units in coal-fired power plants produce a large amount of sludge which must be disposed of, and which is currently landfilled in most cases. Increasing landfill costs are gradually forcing utilities to find other alternatives. In principle, this sludge can be used to make gypsum (CaSO{sub 4}-2H{sub 2}O) for products such as plaster-of-Paris and wallboard, but only if impurities such as unreacted limestone and soluble salts are removed, and the calcium sulfite (CaSO{sub 3}) is oxidized to calcium sulfate (CaSO{sub 4}). This project is investigating methods for removing the impurities from the sludge so that high-quality, salable gypsum products can be made. Work done in the previous quarter concentrated on developing a low-cost froth flotation process that could remove limestone, unburned carbon, and related contaminants from the sludge while recovering the bulk of the calcium sulfite and gypsum. In the current quarter, experiments to remove impurities from the sludge using a water-only cyclone were conducted. The cyclone has been found to be effective for removing the coarser limestone impurities, as well as removing contaminants such as fine gravel and grinding-ball chips. These results show that the cyclone will be very complementary with froth flotation, which mainly removes the very fine impurities.

Kawatra, S.K.; Eisele, T.C. [Michigan Technological Univ., Houghton, MI (United States). Dept. of Metallurgical and Materials Engineering

1993-09-01T23:59:59.000Z

252

CANSOLV{reg_sign} system FGD: An alternative to limestone SO{sub 2} control in FBC  

SciTech Connect

This paper describes the process chemistry, components, emissions, and by-products of the CANSOLV{reg_sign} System SO{sub 2} scrubbing technology, a regenerable process for economical, highly selective capture of SO{sub 2} from gas streams, with outlet SO{sub 2} concentration down to a few ppm if desired. In fluid bed combustors, the CANSOLV{reg_sign} System FGD process can be substituted for limestone injection, realizing significant cost savings. With CANSOLV{reg_sign} System Technology, the FGD by-product is pure, water saturated SO{sub 2} which can be used on site or sold as a commodity chemical or converted into sulfuric acid or sulfur. Since FGD costs with the CANSOLV{reg_sign} System process are only weakly sensitive to the concentration of SO{sub 2} in the feed gas, high sulfur low costs fuels including petroleum coke can be burned economically. Compared with limestone injection in FBC, the CANSOLV{reg_sign} System FGD process eliminates the need for limestone handling. Solid by-product volumes are very significantly reduced, simplifying both collection and disposal. Chemical consumption is essentially eliminated. The process generates a valuable by-product instead of a costly waste stream. Fuel costs can be minimized and significant operating cost savings can be expected. 3 refs., 4 figs.

Parisi, P.J.; Sarlis, J.N. [Cansolv Technologies Inc., Montreal, Quebec (Canada)

1997-12-31T23:59:59.000Z

253

Mo Supply Chain for Nuclear Medicine Ladimer S. Nagurney  

E-Print Network (OSTI)

The 99 Mo Supply Chain for Nuclear Medicine Ladimer S. Nagurney Department of Electrical November 13, 2012 #12;Nuclear Medicine: Meeting Patient Needs with 99 Mo Ladimer S. Nagurney The 99 Mo Supply Chain #12;Background and Motivation Study of Nuclear Medicine Supply Chains is a combination

Nagurney, Anna

254

Development of CaMoO4 crystal scintillators for double beta decay experiment with 100-Mo  

E-Print Network (OSTI)

Energy resolution, alpha/beta ratio, pulse-shape discrimination for gamma rays and alpha particles, temperature dependence of scintillation properties, and radioactive contamination were studied with CaMoO4 crystal scintillators. A high sensitivity experiment to search for neutrinoless double beta decay of 100-Mo by using CaMoO4 scintillators is discussed.

A. N. Annenkov; O. A. Buzanov; F. A. Danevich; A. Sh. Georgadze; S. K. Kim; H. J. Kim; Y. D. Kim; V. V. Kobychev; V. N. Kornoukhov; M. Korzhik; J. I. Lee; O. Missevitch; V. M. Mokina; S. S. Nagorny; A. S. Nikolaiko; D. V. Poda; R. B. Podviyanuk; D. J. Sedlak; O. G. Shkulkova; J. H. So; I. M. Solsky; V. I. Tretyak; S. S. Yurchenko

2007-07-10T23:59:59.000Z

255

Processing, Microstructure, and Properties of Multiphase Mo Silicide Alloys  

SciTech Connect

Multiphase Mo silicide alloys containing T2 (Mo{sub 5}SiB{sub 2}), Mo{sub 3}Si and Mo phases where prepared by both melting and casting (M and C) and powder metallurgical (PM) processes. Glassy phases are observed in PM materials but not in M and C materials. Microstructural studies indicate that the primary phase is Mo-rich solid solution in alloys containing {le}(9.4Si+13.8B, at. %) and T2 in alloys with {ge}(9.8Si+14.6B). An eutectic composition is estimated to be close to Mo-9.6Si-14.2B. The mechanical properties of multiphase silicide alloys were determined by hardness, tensile and bending tests at room temperature. The multiphase alloy MSB-18 (Mo-9.4Si-13.8B) possesses a flexure strength distinctly higher than that of MoSi{sub 2} and other Mo{sub 5}Si{sub 3} silicide alloys containing no Mo particles. Also, MSB-18 is tougher than MoSi{sub 2} by a factor of 4.

Heatherly, L.; Liu, C.T.; Schneibel, J.H.

1998-11-30T23:59:59.000Z

256

Missouri Department of National Resources Energy Center Mo DNR | Open  

Open Energy Info (EERE)

Department of National Resources Energy Center Mo DNR Department of National Resources Energy Center Mo DNR Jump to: navigation, search Name Missouri Department of National Resources Energy Center (Mo DNR) Place Jefferson City, Missouri Zip 65102 Product Mo DNR manages the Energy Revolving Fund which assists public organisations in Missouri in financing energy efficient projects for their facilities. References Missouri Department of National Resources Energy Center (Mo DNR)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Missouri Department of National Resources Energy Center (Mo DNR) is a company located in Jefferson City, Missouri . References ↑ "Missouri Department of National Resources Energy Center (Mo

257

Performance of Mo/Au TES microcalorimeters  

Science Journals Connector (OSTI)

We are developing X-ray calorimeters to meet the specifications of the Constellation-X mission. Each calorimeter consists of a transition-edge-sensor (TES) thermometer which is suspended on a silicon-nitride membrane. Our TES thermometers are Mo/Au bilayer films that are biased in the sharp phase transition between the superconducting and normal-metal states. These calorimeters have demonstrated very good energy resolutions: 2.4 eV at 1.5 keV and 3.7 eV at 3.3 keV. The energy resolutions are limited by thermal noise and Johnson noise (which are intrinsic to any resistive calorimeter) plus excess noise. The excess noise which is several times larger than the Johnson noise is consistent with frequency-independent voltage noise in the TES. Detailed measurements of one Mo/Au TES demonstrate that the excess noise is independent of the voltage applied to the TES over a range of biases at the same TES resistance. The magnitude of the excess noise is smallest at the high-resistance end of the phase transition. We also compared noise in square Mo/Au TESs ranging in size from 300 microns to 600 microns to learn how the excess noise is affected by the geometry of the TES.

Mark A. Lindeman; Regis P. Brekosky; Enectali Figueroa-Feliciano; Fred M. Finkbeiner; Mary Li; Caroline K. Stahle; Carl M. Stahle; Nilesh Tralshawala

2002-01-01T23:59:59.000Z

258

Geochemistry of Magnesium Silicate Carbonation in an Aqueous Medium  

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

Geochemistry of Magnesium Silicate Geochemistry of Magnesium Silicate Carbonation in an Aqueous Medium (Carbon Mineralization) Jon Benner, Deb Bergfeld, Dave Bish, Darrin Byler, Bill Carey, Steve Chipera, George Guthrie, Klaus Lackner, Hans Ziock Hydrology, Geochemistry, Geology Group Los Alamos National Laboratory LA-UR-01-4206 Approved for public release; distribution is unlimited George Guthrie gguthrie@lanl.gov 505-665-6340 Mineral Carbonation: Conversion of CO 2 into Carbonates * alkali carbonates too soluble * alkaline earth carbonates ideal sources: Ca-silicates (feldspar) Mg-silicates (olivine, serpentine, clays) Mg 2+ + CO 3 2- => MgCO 3 Mg 2 SiO 4 + 4H + => 2Mg 2+ + SiO 2(aq) Ultramafic rocks are an abundant Mg source (~0.2 km) 3 serpentine / GW-yr Challenges for Mineral-Carbonation

259

Oxidation of magnesium single crystals and evaporated films  

Science Journals Connector (OSTI)

The oxidation of (001) and (100) faces of pure magnesium single crystals at 2.5 mm Hg oxygen pressure was measured at 400C and 440C by means of an all-quartz, high vacuum microbalance. In a first approximation a parabolic oxidation law is observed. The oxidation rate on the basal plane is initially higher than on the prismatic plane. Electron diffraction patterns and photomicrographs indicate that the oxide has a preferred orientation on the basal plane, even for a thickness of about 1000 . The oxidation of evaporated magnesium films at room temperature was also investigated. After an induction period a logarithmic oxidation law is observed, where the limiting thickness is dependent on the oxygen pressure.

R.R Addiss Jr.

1963-01-01T23:59:59.000Z

260

Fretting wear of coated magnesium and steel couples  

Science Journals Connector (OSTI)

An experimental procedure is undertaken to establish the effect of design parameters upon the severity of fretting wear caused by steel (AMS 6265) rubbing on magnesium (AMS 4439), and to determine the ability of selected coatings to delay wear induced failure. The procedure consists of two major tasks as follows: The design, construction and operation of a suitable fretting wear machine, and an experimental set-up to systematically evaluate the relevant wear controlling parameters and surface treatment. Several wear tests were performed under different operating and surface conditions, and the results are presented in some detail. It was found that magnaplated coated magnesium samples offer the best wear resistance as compared to Xylan coated and plain samples. Slip amplitude was found to be the most dominant parameter that contributed mainly to fretting wear as compared to other wear parameters such as frequency of oscillation, test duration, and contact load.

A.H. Elkholy

1996-01-01T23:59:59.000Z

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


261

Forming of Magnesium - Crystal Plasticity and Plastic Potentials  

SciTech Connect

Hexagonal close-packed (hcp) metals show a deformation behavior, which is quite different from that of materials with cubic crystalline structure. As a consequence, rolled or extruded products of magnesium and its alloys exhibit a strong anisotropy and an unlike yielding in tension and compression. Microstructural mechanisms of deformation in pure magnesium are modeled by constitutive equations of crystal plasticity. Single crystals and textured polycrystals are analyzed numerically. By means of virtual mechanical tests of representative volume elements mesoscopic yield surfaces are generated and compared with phenomenological yield surfaces. The hardening behavior as well as deformation kinematics are accounted while fitting the respective model parameters for a plane stress state. The linking of micro- and mesoscale provides a procedure for the simulation of the yielding and hardening behavior of arbitrarily textured solids with hcp structure such as extruded bars or rolled plates.

Steglich, Dirk; Graff, Stephane; Brocks, Wolfgang [GKSS Research Center, Institute for Materials Research, Mechanics of Materials, Geesthacht (Germany)

2007-04-07T23:59:59.000Z

262

Performance of Magnesium Cathode in the S Band RF Gun  

SciTech Connect

In this paper, we present the preliminary results of the performance of magnesium cathode in a high frequency RF gun. The quantum efficiency of magnesium showed a dramatic improvement upon laser cleaning, increasing from 10{sup -5} to 4x10{sup -4} after two hours of cleaning. The spatial uniformity of emission also improved from a spot to spot variation of 10 to a variation of 2. Measurements with charges >1 nC indicate that the transient variation of the field due to the shielding effect of the electron in the vicinity of the cathode may play a critical role in the efficient extraction of electrons. Comprehensive theory that includes the electron emission in the presence of a time dependent Schottky effect and RF effects will be discussed.

Srinivasan-Rao, T.; /Brookhaven; Palmer, D.T.; /SLAC; Ben-Zvi, I.; /Brookhaven; Miller, R.H.; /SLAC; Wang, X.J.; Woodle, M.; /Brookhaven

2011-09-01T23:59:59.000Z

263

DOE - Office of Legacy Management -- United Nuclear Corp - MO 0-03  

Office of Legacy Management (LM)

United Nuclear Corp - MO 0-03 United Nuclear Corp - MO 0-03 FUSRAP Considered Sites Site: UNITED NUCLEAR CORP. (MO.0-03) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: Mallinckrodt Chemical Works Mallinckrodt Nuclear Corporation MO.0-03-1 MO.0-03-2 Location: Hematite , Missouri MO.0-03-1 Evaluation Year: Circa 1987 MO.0-03-3 Site Operations: Commercial fuel fabrication operation. Licensed to reclaim unirradiated enriched uranium from scrap generated in fuel fabrication and fuel material preparation. MO.0-03-1 MO.0-03-2 MO.0-03-3 MO.0-03-4 Site Disposition: Eliminated - NRC licensed - Commercial operations MO.0-03-3 MO.0-03-5 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium MO.0-03-3 Radiological Survey(s): None Indicated

264

Efficient One-Step Electrolytic Recycling of Low-Grade and Post-Consumer Magnesium Scrap  

SciTech Connect

Metal Oxygen Separation Technologies, Inc. (abbreviated MOxST, pronounced most) and Boston University (BU) have developed a new low-cost process for recycling post-consumer co-mingled and heavily-oxidized magnesium scrap, and discovered a new chemical mechanism for magnesium separations in the process. The new process, designated MagReGenTM, is very effective in laboratory experiments, and on scale-up promises to be the lowest-cost lowest-energy lowest-impact method for separating magnesium metal from aluminum while recovering oxidized magnesium. MagReGenTM uses as little as one-eighth as much energy as today's methods for recycling magnesium metal from comingled scrap. As such, this technology could play a vital role in recycling automotive non-ferrous metals, particularly as motor vehicle magnesium/aluminum ratios increase in order to reduce vehicle weight and increase efficiency.

Adam C. Powell, IV

2012-07-19T23:59:59.000Z

265

Study of Forming of Magnesium Alloy by Explosive Energy  

SciTech Connect

Magnesium alloy is an attractive next generation material due to its high specific strength with low weight. However, magnesium alloys has few slip lines with close-packed hexagonal lattice, and generally poor ductility at room temperature, therefore it is difficult to form this material by cold forging. It is well known that the speed of deformation of metallic materials rapidly changes at the high strain rate. For some metallic materials, it is reported that the ductility also increases at the high strain rate with this speed effect. In this study, a series of high speed impulsive compressive tests were carried. By using explosives for shock wave loading, the velocity in this experiment reached 100 m/s that can't be easily obtained in normal experiment. In this paper, the possibility of forming the AZ31 extrusion magnesium alloy using explosive-impulsive pressure is investigated. And improved ductility by the effect of high-rate deformation is observed with this alloy.

Ruan, Liqun; Hokamoto, Kazuyuki; Marumo, Yasuo [Kumamoto University Department of Mechanical Systems Engineering Graduate School of Science and Technology, Kurokami 2-39-1, Kumamoto-shi 860-8555 (Japan); Yahiro, Ititoku [Mitsui Engineering and Shipbuilding Co., Ltd. Nihonbasi 1-3-16, Toukyou 104-8439 (Japan)

2011-05-04T23:59:59.000Z

266

An investigation of the creep phenomena exhibited by Solenhofen limestone, halite, and cement under medium confining pressures  

E-Print Network (OSTI)

BY SOLENHOFEN LIMESTONE, HALITE, AND CFMI-NT UNDFR MEPIUI CONFINING PRESSURES A THESIS Bv HALCOMBE A. KENDALL A PPROVEO AS TO STYLE AND CONTENT BY AIRMAN OF COMM TTEE EAD OF PEPARTMENT ~M* 19 8 A BSTRACT TABLE OF CONTENTS PAGE 1 INTRODUCT ION... SPECI'i NS. . FIGURE 9 . FAILURE OF HALITE CRYSTALS . . ABSTRACT THE DYNAMICS OF THE CREEP PHENOMENA OF ROCKS I S KNOWN TO BE INTER RELATED WI TH THE NATURAL ENVIROMENTAL COND IT IONG FOUND DEEP IN THE CRUST OF THE EARTH ~ AHONG THESE COND I...

Kendall, Halcombe Augustus

2012-06-07T23:59:59.000Z

267

Aqueous Corrosion Behavior of Micro Arc Oxidation (MAO)-Coated Magnesium Alloys: A Critical Review  

Science Journals Connector (OSTI)

Magnesium (Mg) and its alloys, in the current era of persistently growing engineering demands, have become the most promising materials finding widespread industrial applications. Numerous processes are available...

L. Rama Krishna; G. Sundararajan

2014-06-01T23:59:59.000Z

268

E-Print Network 3.0 - aluminium magnesium alloy Sample Search...  

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

36 per cent Summary: and Anwar Parvez analyse the importance of Magnesium-Aluminium- Strontium alloys for more fuel... can be achieved through replacing aluminium and some steel...

269

Double-Sided Arc Welding of AZ31B Magnesium Alloy Sheet.  

E-Print Network (OSTI)

??Magnesium alloys are of interest to the automotive industry because of their high specific strength and potential to reduce vehicle weight and fuel consumption. In (more)

Shuck, Gerald

2013-01-01T23:59:59.000Z

270

Fatigue Characterization and Cyclic Plasticity Modeling of Magnesium Spot-Welds.  

E-Print Network (OSTI)

??The automotive industry is adopting lightweight materials to improve emissions and fuel economy. Magnesium (Mg) alloys are the lightest of engineering metals, but work is (more)

Behravesh, Seyed Behzad

2013-01-01T23:59:59.000Z

271

Ductility and chemical reactions at the interface between nickel and magnesium oxide single crystals.  

E-Print Network (OSTI)

??An investigation was conducted on the interaction between nickel metal and single crystals of magnesium oxide. The nickel was cleaned with purified hydrogen gas at (more)

Hasselman, Didericus Petrus Hermannus

2011-01-01T23:59:59.000Z

272

Minerals to dairy cows with focus on calcium and magnesium balance.  

E-Print Network (OSTI)

??Both clinical and subclinical deficiency of calcium and magnesium may cause problems in dairy cows. Clinical hypocalcaemia most commonly occurs at calving and onset of (more)

Kronqvist, Cecilia

2011-01-01T23:59:59.000Z

273

Numerical Modeling of Failure in Magnesium Alloys under Axial Compression and Bending for Crashworthiness Applications.  

E-Print Network (OSTI)

??Numerical modeling of failure was performed for magnesium alloys with circular and square cross-sections under axial compression. The failure criterion was employed using material model (more)

Ali, Usman

2012-01-01T23:59:59.000Z

274

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

E-Print Network (OSTI)

??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)

Steinmetz, Andrew Douglas

2011-01-01T23:59:59.000Z

275

E-Print Network 3.0 - az magnesium alloys Sample Search Results  

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

Engineering, University of Iowa Collection: Materials Science 17 The Effect of Rare Earth Elements, Temperature and Rolling Speed on the Microstructure Evolution of Magnesium...

276

Thermal behavior of Al/MoO3 xerogel nanocomposites  

Science Journals Connector (OSTI)

Abstract Solgel process using molybdenum alkoxides was employed to prepare Al/MoO3 xerogel nanocomposites as a thermite with better performance by improvement of interfacial contact area between the oxidizer and fuel. Micromorphology and thermite reaction characteristics of Al/MoO3 xerogel nanocomposites were analyzed by scanning electron microscopy (SEM) and thermogravimetry/differential scanning calorimetry (TG/DSC), respectively. In the present Al/MoO3 xerogel system, it was found that exothermic enthalpy increases as the Al/Mo mole ratio increases and then decreases when Al/Mo mole ratio is larger than 6 indicating that optimum mole ratio of Al/Mo is 6 with reaction enthalpy of 420.58J/g.

Han-Su Seo; Jae-Kyeong Kim; Jun-Woo Kim; Hyoun-Soo Kim; Kee-Kahb Koo

2014-01-01T23:59:59.000Z

277

Neutron Hole States of Mo-93,95  

E-Print Network (OSTI)

I I I0 IO 20 3040 50 60 0 I I I I I I IO 20 30 40 5Q 60 IO 2- 0 I I I lo 20 X) 40 50 60 I j I I I l 0 lo 20 30 4050 60 8, .(deg) 8,~. (deg) {deg) {deg) FIG. 2. Angular distributions for the +Mo(P, d)93Mo reaction. The errors sho....20 l X=2 0.769 2=4 0.8l6 2=2 Mo(d, t) Mo l IGO= P IQ IO? IG 10 IQ 10 IGO? IQ I I I I l.092 2=2+4 = IO IQ)- l.674 All the angular distributions obtained along mith the D%'BA fits for the states analyzed in the "Mo(d, t)9'Mo...

Bindal, P. K.; Youngblood, David H.; Kozub, R. L.

1977-01-01T23:59:59.000Z

278

Temperature-dependent nanocrystal formation in Mo/Si multilayers  

SciTech Connect

We investigated the nanocrystallinity of Mo/Si multilayers as a function of the Mo:Si ratio in the period using grazing incidence and wide angle x-ray diffraction, both for as-deposited samples and after thermal annealing up to 800 deg. C under UHV conditions. The research was performed on multilayers, as applied for extreme UV lithography with period thickness of approximately 7 nm. The as-deposited multilayer nanostructure was found to depend on the Mo to Si layer thickness ratio. For intermediate Mo fractions in the multilayer period, a four layer system is formed, with amorphous Si and polycrystalline Mo layers separated by silicide interfaces, while for low and high Mo fractions, a two component system is formed, respectively, consisting of a pure Mo layer (in the case of a high Mo fraction) or pure Si layer (low Mo fraction) separated by a single silicide interface. Using the crystallographic properties of the multilayer during annealing, we describe the continuous development of the multilayer structure and growth of the silicide interfaces. Our study has led to an explanatory model which is based on the total free energy minimization of the multilayer system. Finally, a phase transition to a crystalline silicide is observed at T>300 deg. C. This phase transition can also be explained by minimization of the total free energy.

Nedelcu, I.; Kruijs, R. W. E. van de; Yakshin, A. E.; Bijkerk, F. [FOM-Institute for Plasma Physics Rijnhuizen, P.O. Box. 1207, 3430 BE Nieuwegein (Netherlands)

2007-12-15T23:59:59.000Z

279

Recovery and utilization of gypsum and limestone from scrubber sludge. Technical report, December 1, 1992--February 28, 1993  

SciTech Connect

Wet flue-gas desulfurization units in coal-fired power plants produce a large amount of sludge which must be disposed of, and which is currently landfilled in most cases. Increasing landfill costs are gradually forcing utilities to find other alternatives. In principle, this sludge can be used to make gypsum (CaSO{sub 4}-2H{sub 2}O) for products such as plaster-of-Paris and wallboard, but only if impurities such as unreacted limestone and soluble salts are removed, and the calcium sulfite (CaSO{sub 3}) is oxidized to calcium sulfate (CaSO{sub 4}). This project is investigating methods for removing the impurities from the sludge so that high-quality, salable gypsum products can be made. Work done in the previous quarter concentrated on developing a dependable technique for analysis of scrubber sludge, so that it would be possible to determine exactly how well a particular purification process was working. This technique was then used to characterize the sludge from a particular Illinois power station. In the current quarter, studies were carried out using froth flotation to produce a product that could be oxidized to high-purity gypsum. These experiments have been quite successful, due to certain properties of the limestone impurity that makes it easier to remove by this method than was expected.

Kawatra, S.K.; Eisele, T.C. [Michigan Technological Univ., Houghton, MI (United States). Dept. of Metallurgical and Materials Engineering; Banerjee, D. [Illinois Clean Coal Inst., Carterville, IL (United States)

1993-05-01T23:59:59.000Z

280

An evaluation of acid frac/matrix stimulation of a tight limestone formation in exploratory wells in Kuwait  

SciTech Connect

With the advent of Kuwait's intensive exploratory activities to locate and test deeper geologic structures, tighter and very low porosity limestone formations were progressively encountered. Most of these hydrocarbon bearing formations initially appeared to be very stubborn and hardly indicated any fluid influx into the well-bore. In certain cases the hydrostatic head was nearly completely removed by unloading the well practically down to perforations, thereby creating optimum draw-down but it either resulted in poor inflow or none at all. In the absence of currently available chemicals, equipment, job design engineering and better understanding of tight carbonate formations and their responses to various acid formulations, some of these could have slipped into unattractive categories. With the implementation of specially designed matrix and acid-frac treatments, these formation have, however, been unmasked and turned out to be highly potential finds now. This paper basically outlines the salient features of theoretical and operational aspects of stimulating and testing some of the very low porosity hard limestone formations in Kuwait recently.

Singh, J.R.

1985-03-01T23:59:59.000Z

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


281

Pilot-scale Limestone Emission Control (LEC) process: A development project. Volume 1, Main report and appendices A, B, C, and D: Final report  

SciTech Connect

ETS, Inc., a pollution consulting firm with headquarters in Roanoke, Virginia, has developed a dry, limestone-based flue gas desulfurization (FGD) system. This SO{sub 2} removal system, called Limestone Emission Control (LEC), can be designed for installation on either new or existing coal-fired boilers. In the LEC process, the SO{sub 2} in the flue gas reacts with wetted granular limestone that is contained in a moving bed. A surface layer of principally calcium sulfate (CaSO{sub 4}) is formed on the limestone. Periodic removal of this surface layer by mechanical agitation allows high utilization of the limestone granules. A nominal 5,000 acfm LEC pilot plant has been designed, fabricated and installed on the slipstream of a 70,000 pph stoker boiler providing steam to Ohio University`s Athens, Ohio campus. A total of over 90 experimental trials have been performed using the pilot-scale moving-bed LEC dry scrubber as a part of this research project with run times ranging up to a high of 125 hours. SO{sub 2} removal efficiencies as high as 99.9% were achievable for all experimental conditions studied during which sufficient humidification was added to the LEC bed. The LEC process and conventional limestone scrubbing have been compared on an equatable basis using flue gas conditions that would be expected at the outlet of the electrostatic precipitator (ESP) of a 500 MW coal-fired power plant. The LEC was found to have a definite economic advantage in both direct capital costs and operating costs. Based on the success and findings of the present project, the next step in LEC process development will be a full-scale commercial demonstration unit.

Prudich, M.E. [Ohio Univ., Athens, OH (United States); Appell, K.W.; McKenna, J.D. [ETS, Inc., Roanoke, VA (United States)

1994-03-01T23:59:59.000Z

282

Trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium / magnesium dialkyl catalysts  

E-Print Network (OSTI)

borohydrido neodymium / magnesium dialkyl catalysts A. Venturaa , T. Chenalb,c,d,e, *, M. Briab,f , F. Bonnetb neodymium and magnesium, and significant amounts of 1,2-units are observed. When considered for butadiene

Boyer, Edmond

283

In Situ Measurement of Magnesium Carbonate Formation from CO2 Using Static High-Pressure and -Temperature 13  

E-Print Network (OSTI)

In Situ Measurement of Magnesium Carbonate Formation from CO2 Using Static High the reaction of CO2 with water. Many studies6,8-10 have focused on the carbonation of the magnesium-contai

Skemer, Philip

284

Laboratory Investigations in Support of Carbon Dioxide-Limestone Sequestration in the Ocean  

SciTech Connect

This semi-annual progress reports includes further findings on CO{sub 2}-in-Water emulsions stabilized by fine particles of limestone (CaCO{sub 3}). Specifically, here we report on the tests performed in the DOE National Energy Technology Laboratory High Pressure Water Tunnel Facility (HPWTF) using a Kenics-type static mixer for the formation of a CO{sub 2}-H{sub 2}O emulsion stabilized by fine particles of CaCO{sub 3}. The tested static mixer has an ID of 0.5 cm, length 23.5 cm, number of baffles 27. Under pressure, a slurry of CaCO{sub 3} particles (mean particle size 6 {micro}m) in reverse osmosis (RO) water and liquid CO{sub 2} were co-injected into the mixer. From the mixer, the resulting emulsion flowed into the HPWTF, which was filled with RO water kept at 6.8 MPa pressure and 4, 8 or 12 C. The emulsion plume was photographed by three video cameras through spy windows mounted on the wall of the HPWTF. The mixer produced an emulsion consisting of tiny CO{sub 2} droplets sheathed with a layer of CaCO{sub 3} particles dispersed in water. The sheathed droplets are called globules. The globules diameter was measured to be in the 300-500 {micro}m range. The globules were sinking in the HPWTF, indicating that they are heavier than the ambient water. The tests in the HPWTF confirmed that the Kenics-type static mixer is an efficient device for forming a CO{sub 2}-H{sub 2}O emulsion stabilized by fine particles of CaCO{sub 3}. The static mixer may prove to be a practical device for sequestering large quantities of CO{sub 2} in the deep ocean in the form of a CO{sub 2}-H{sub 2}O-CaCO{sub 3} emulsion. The static mixer can be mounted at the end of pipelines feeding the mixer. The static mixer has no moving parts. The pressure drop across the mixer that is necessary to sustain good mixing is created by the hydrostatic pressure of liquid CO{sub 2} and the slurry of CaCO{sub 3} in the pipes that feed the mixer. The tests in the HPWTF demonstrated that the emulsion plume is heavier than ambient seawater, hence the plume will sink to greater depth from the release point. Preliminary modeling indicates that an emulsion plume released at 500 m depth (the minimum depth required to prevent liquid CO{sub 2} flashing into vapor) may sink hundreds of meters before the plume comes to rest in the density stratified ocean water. Furthermore, tests in our laboratory showed that the emulsion is slightly alkaline, not acidic, because of the excess of CaCO{sub 3} particles present in the plume. Thus, the release of the CO{sub 2}-H{sub 2}OCaCO{sub 3} emulsion in the deep ocean is not likely to acidify the seawater around the release point. The possible acidification of seawater is the major environmental hazard if pure liquid CO{sub 2} were released in the deep ocean.

Dan Golomb; Eugene Barry; David Ryan; Stephen Pennell; Peter Swett; Huishan Duan; Michael Woods

2006-04-01T23:59:59.000Z

285

A. Bag, W. Zhou, D. Taplin and E. S. Dwarakadasa, Fatigue Behaviour of AZ91D Magnesium Alloy and its Composite Reinforced with SiC, in Magnesium Technology 2000, eds. H. I. Kaplan, J. N. Hryn  

E-Print Network (OSTI)

A. Bag, W. Zhou, D. Taplin and E. S. Dwarakadasa, Fatigue Behaviour of AZ91D Magnesium Alloy and its Composite Reinforced with SiC, in Magnesium Technology 2000, eds. H. I. Kaplan, J. N. Hryn and B. B. Clow, Nashville, Tennessee, Mar. 2000, pp. 345-348. FATIGUE BEHAVIOUR OF AZ91D MAGNESIUM ALLOY

Zhou, Wei

286

Time evolution of colliding laser produced magnesium plasmas investigated using a pinhole camera  

E-Print Network (OSTI)

suitable conditions for x-ray amplification in a laser produced plasma.24 When two plasmas collide, variTime evolution of colliding laser produced magnesium plasmas investigated using a pinhole camera S for publication 14 February 2001 Time resolved studies of colliding laser produced magnesium plasmas are performed

Harilal, S. S.

287

Three-photon above-threshold ionization of magnesium F. Martin,2  

E-Print Network (OSTI)

Three-photon above-threshold ionization of magnesium A. Reber,1 F. Marti´n,2 H. Bachau,3 and R. S of magnesium as an electron source 1 have motivated our theoretical study in three-photon above

Berry, R. Stephen

288

Two-photon above-threshold ionization of magnesium F. Martin,2  

E-Print Network (OSTI)

Two-photon above-threshold ionization of magnesium A. Reber,1 F. Marti´n,2 H. Bachau,3 and R. S to understanding the photoionization properties of magnesium 1­8 , the problem of above- threshold ionization ATI

Berry, R. Stephen

289

Modelling of Superplastic Forming of AZ31 Magnesium Alloy  

SciTech Connect

In this study the constitutive equation of the superplastic AZ31 magnesium-based alloy is modelled by the power law relationship between the stress, the strain and the strain-rate and an accurate procedure for determining the constants of the material is presented. Moreover, the problem of optimizing the pressure-time load curve of a free forming process is investigated and resolved by means of a pressure jump forming process. The experimental tests, carried out to support the finite-element modelling, have shown good agreement between the numerical results and the experimental data.

Giuliano, G. [University of Cassino, Department of Industrial Engineering, via Di Biasio 43, 03043 Cassino (Italy)

2011-01-17T23:59:59.000Z

290

An investigation of magnesium production in silicon by neutron transmutation  

E-Print Network (OSTI)

the reactor. Thus, the f'lux at a lower power is, to a good approximation decreased from that deter mined at 1 MWt by the ratio of the reactor power to a power of' 1 MWt. Determination of the alpha current incident on the track detector film depends... Science Center Reactor (NSCR), (2) exper i mental determination of the production r ate of magnesium in silicon using a solid state nuclear track detector (SSNTD) to measur e alpha emission, and (3) comparison oi' the exper imental r esults...

Davis, Freddie Joe

2012-06-07T23:59:59.000Z

291

CIRP Conference on Modeling of Machining Operations (CIRP CMMO) Constitutive Modelling of AZ31B-O Magnesium Alloy  

E-Print Network (OSTI)

B-O Magnesium Alloy for Cryogenic Machining E. Girauda* , F. Rossib , G. Germaina , J.C. Outeirob disks of AZ31B-O magnesium alloy, using a special designed tool. In order to include the effects of Machining Operations" in the person of the Conference Chair Prof. Luca Settineri Keywords: Magnesium alloy

Paris-Sud XI, Université de

292

The Role of Magnesium for Geometry and Charge in GTP Hydrolysis, Revealed by Quantum Mechanics/Molecular Mechanics Simulations  

E-Print Network (OSTI)

The Role of Magnesium for Geometry and Charge in GTP Hydrolysis, Revealed by Quantum Mechanics, People's Republic of China ABSTRACT The coordination of the magnesium ion in proteins by triphosphates conversion. For example, in Ras the magnesium ion contributes to the catalysis of GTP hydrolysis

Gerwert, Klaus

293

A Late Neoproterozoic (V630 Ma) high-magnesium andesite suite from southern Israel: implications for the consolidation  

E-Print Network (OSTI)

A Late Neoproterozoic (V630 Ma) high-magnesium andesite suite from southern Israel: implications and depleted in heavy rare earth elements. They are high-magnesium andesites and are similar to low-Ca type 2; Neoproterozoic; high-magnesium andesite 1. Introduction The Arabian^Nubian Shield (ANS) comprises 0012-821X / 03

Basu, Asish R.

294

Magnesium aluminate (MgAl2O4) spinel produced via self-heat-sustained (SHS) technique  

E-Print Network (OSTI)

Magnesium aluminate (MgAl2O4) spinel produced via self-heat-sustained (SHS) technique Lim Rooi of the reactants to produce very high phase-purity magnesium aluminate powder under rather mild experi- mental effect of slightly off-stoichiometry ( 9 wt. %) in composi- tions on either side of magnesium aluminate

Azad, Abdul-Majeed

295

AM1/d Parameters for Magnesium in Metalloenzymes Petra Imhof, Frank Noe, Stefan Fischer, and Jeremy C. Smith*,  

E-Print Network (OSTI)

AM1/d Parameters for Magnesium in Metalloenzymes Petra Imhof, Frank Noe´, Stefan Fischer parameters are derived for magnesium, optimized for modeling reactions in metalloenzymes. The parameters calculated with density functional theory. The training set consists of compounds with magnesium coordinated

296

A Comparison of Magnesium and Beryllium Acceptors in GaN Grown by rf-Plasma Assisted Molecular Beam Epitaxy  

E-Print Network (OSTI)

A Comparison of Magnesium and Beryllium Acceptors in GaN Grown by rf-Plasma Assisted Molecular Beam Evans and Associates, Sunnyvale, CA 94086 ABSTRACT Step-doped structures of both magnesium and beryllium activation energy of approximately 100 meV. INTRODUCTION While magnesium is currently the most

Myers, Tom

297

Changes in histamine and white blood cells in the blood, spleen and thymus of magnesium-deficient rat  

E-Print Network (OSTI)

Changes in histamine and white blood cells in the blood, spleen and thymus of magnesium of rats were given either a control or a magnesium-deficient diet. The well-known allergy-like crisis, characterized by vasodilatation with redness of the ears and dermatosis, occurred spontaneously in the magnesium

Paris-Sud XI, Université de

298

Carbon dioxide adsorbents containing magnesium oxide suitable for use at high temperatures  

DOE Patents (OSTI)

Adsorption of carbon dioxide from gas streams at temperatures in the range of 300 to 500.degree. C. is carried out with a solid adsorbent containing magnesium oxide, preferably promoted with an alkali metal carbonate or bicarbonate so that the atomic ratio of alkali metal to magnesium is in the range of 0.006 to 2.60. Preferred adsorbents are made from the precipitate formed on addition of alkali metal and carbonate ions to an aqueous solution of a magnesium salt. Atomic ratios of alkali metal to magnesium can be adjusted by washing the precipitate with water. Low surface area adsorbents can be made by dehydration and CO.sub.2 removal of magnesium hydroxycarbonate, with or without alkali metal promotion. The process is especially valuable in pressure swing adsorption operations.

Mayorga, Steven Gerard (Allentown, PA); Weigel, Scott Jeffrey (Allentown, PA); Gaffney, Thomas Richard (Allentown, PA); Brzozowski, Jeffrey Richard (Macungie, PA)

2001-01-01T23:59:59.000Z

299

DOE - Office of Legacy Management -- Rogers Iron Works Co - MO 10  

Office of Legacy Management (LM)

Rogers Iron Works Co - MO 10 Rogers Iron Works Co - MO 10 FUSRAP Considered Sites Site: ROGERS IRON WORKS CO. (MO.10 ) Elimination from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Rogers Iron Co. MO.10-1 Location: Joplin , Missouri MO.10-1 Evaluation Year: 1990 MO.10-2 MO.10-3 Site Operations: Tested C-liner crushing methods. MO.10-1 Site Disposition: Eliminated - Potential for contamination considered remote based on limited quantities of material handled MO.10-3 MO.10-4 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium (Trace Amounts) MO.10-2 Radiological Survey(s): None Indicated Site Status: Elimination from consideration under FUSRAP Also see Documents Related to ROGERS IRON WORKS CO. MO.10-1 - National Lead Company of Ohio Analytical Data Sheet 9908;

300

Co-Mo Electric Cooperative - Residential Energy Efficiency Rebate Program |  

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

Co-Mo Electric Cooperative - Residential Energy Efficiency Rebate Co-Mo Electric Cooperative - Residential Energy Efficiency Rebate Program Co-Mo Electric Cooperative - Residential Energy Efficiency Rebate Program < Back Eligibility Commercial Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Cooling Maximum Rebate Geothermal Heat Pumps: 10 ton maximum for Residential, 50 ton maximum for Commercial Program Info State Missouri Program Type Utility Rebate Program Rebate Amount Room AC: $50 Water Heater: $50 Air Source Heat Pumps: $150 per ton Dual Fuel Air Source Heat Pumps: $300 per ton Geothermal Heat Pumps (Closed Loop): up to $850 per ton Geothermal Heat Pumps (Open Loop or Replacement): $150 per ton Provider Co-Mo Electric Cooperative Co-Mo Electric Cooperative provides rebates to residential and commercial

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


301

Microsoft Word - Poster Abstract_2010_MO-SCI.doc  

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

* * Presenter High-Temperature Viscous Sealing Glasses for Solid Oxide Fuel Cells Cheol-Woon Kim * , Cindy L. Schwartz, Joe Szabo, Kevin S. Barr, and Ted E. Day MO-SCI Corporation, Rolla, MO 65401 * ckim@mo-sci.com; (573) 364-2338 Richard K. Brow ** and Zhongzhi Tang Department of Materials Science and Engineering and the Graduate Center for Materials Research, Missouri University of Science and Technology, Rolla, MO 65409-1170 ** brow@mst.edu; (573) 341-6812 MO-SCI Corporation and the Missouri University of Science and Technology successfully identified and tested several glass compositions that could be used as viscous seals for Solid Oxide Fuel Cells (SOFCs) through a SBIR Phase I project (DE-SC0002491). The glasses possess desirable viscosity characteristics- that is, they have softening points in the temperature range

302

Comparison of the morphology of alkalisilica gel formed in limestones in concrete affected by the so-called alkalicarbonate reaction (ACR) and alkalisilica reaction (ASR)  

SciTech Connect

The morphology of alkalisilica gel formed in dolomitic limestone affected by the so-called alkalicarbonate reaction (ACR) is compared to that formed in a siliceous limestone affected by alkalisilica reaction (ASR). The particle of dolomitic limestone was extracted from the experimental sidewalk in Kingston, Ontario, Canada that was badly cracked due to ACR. The siliceous limestone particle was extracted from a core taken from a highway structure in Quebec, affected by ASR. Both cores exhibited marked reaction rims around limestone particles. The aggregate particles were polished and given a light gold coating in preparation for examination in a scanning electron microscope. The gel in the ACR aggregate formed stringers between the calcite crystals in the matrix of the rock, whereas gel in ASR concrete formed a thick layer on top of the calcite crystals, that are of the same size as in the ACR aggregate.

Grattan-Bellew, P.E., E-mail: p.grattan-bellew@sympatico.ca [Materials and Petrographic Research G-B Inc., 472 Edison Avenue, Ottawa, ON, Canada K2A 1T9 (Canada); Chan, Gordon [NRC Construction, Bldg., M20, 1200 Montreal Road, Ottawa, ON, Canada K1A 0R6 (Canada)] [NRC Construction, Bldg., M20, 1200 Montreal Road, Ottawa, ON, Canada K1A 0R6 (Canada)

2013-05-15T23:59:59.000Z

303

In situ synthesis of magnesium-substituted biphasic calcium phosphate and in vitro biodegradation  

SciTech Connect

Highlights: ? MgBCP were successfully prepared through in situ aqueous co-precipitation method. ? The amount of ?-TCP phase was changed with the magnesium substitution level. ? The substitution of magnesium led to a decrease in the unit cell volume. ? MgBCP could be able to develop a new apatite phase on the surface faster than BCP. -- Abstract: In situ preparation of magnesium (Mg) substituted biphasic calcium phosphate (BCP) of hydroxyapatite (HAp)/?-tricalcium phosphate (?-TCP) were carried out through aqueous co-precipitation method. The concentrations of added magnesium were varied with the calcium in order to obtain constant (Ca + Mg)/P ratios of 1.602. X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy were used to characterize the structure of synthesized magnesium substituted BCP powders. The results have shown that substitution of magnesium in the calcium deficient apatites revealed the formation of biphasic mixtures of different HAp/?-TCP ratios after heating at 1000 C. The ratios of the formation of phase mixtures were dependent on the content of magnesium. After immersing in Hanks balanced salt solution (HBSS) for 1 week, 1 wt% magnesium substituted BCP powders were degraded and precipitation started to be formed with small granules consisting of number of flake-like crystal onto the surface of synthesized powders. On the other hand, in the case of pure BCP powders, the formation of new precipitates was detected after immersion in HBSS for 2 weeks. On the basis of these results, magnesium substituted BCP could be able to develop a new apatite phase on the surface in contact with physiological fluids faster than BCP does. In addition, the retention time to produce the new apatite phase in implantation operation for the BCP powder could be controlled by the amount of magnesium substitution.

Kim, Tae-Wan; Lee, Hyeong-Shin; Kim, Dong-Hyun; Jin, Hyeong-Ho [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of)] [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of); Hwang, Kyu-Hong [School of Nano and Advanced Materials, Gyeongsang National University, Jinju, Kyungnam 660-701 (Korea, Republic of)] [School of Nano and Advanced Materials, Gyeongsang National University, Jinju, Kyungnam 660-701 (Korea, Republic of); Lee, Jong Kook [Department of Advanced Materials Engineering, Chosun University, Gwangju 501-759 (Korea, Republic of)] [Department of Advanced Materials Engineering, Chosun University, Gwangju 501-759 (Korea, Republic of); Park, Hong-Chae [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of)] [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of); Yoon, Seog-Young, E-mail: syy3@pusan.ac.kr [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of)] [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of)

2012-09-15T23:59:59.000Z

304

MattssonMoVacPrague2009.ppt  

National Nuclear Security Administration (NNSA)

Thomas R Mattsson Thomas R Mattsson Sandia National Laboratories Albuquerque, NM, USA Nils Sandberg -- KTH, Stockholm Richard Armiento -- Univ. Bayreuth, Germany Ann Mattsson -- Sandia National Laboratories Self-diffusion in Mo using the AM05 density functional Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Joint U.S. Russia Conference on Advances in Materials Science Prague, Czech Republic Aug 31-Sept 3, 2009 SAND 2009-2197 C, 2009-3883 C, 2009-4713 C, and 2002-1323 P Vacancy mediated diffusion is the main mechanism for mass transport in solids *Vacancies are important for *Self-diffusion *Defect migration *Radiation damage/ swelling

305

Mo Year Report Period: EIA ID NUMBER:  

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

Version No: 2013.01 Mo Year Report Period: EIA ID NUMBER: http://www.eia.gov/survey/form/eia_14/instructions.pdf Mailing Address: Secure File Transfer option available at: (e.g., PO Box, RR) https://signon.eia.doe.gov/upload/noticeoog.jsp Electronic Transmission: The PC Electronic Zip Code - Data Reporting Option (PEDRO) is available. If interested in software, call (202) 586-9659. Email form to: OOG.SURVEYS@eia.doe.gov - - - - Fax form to: (202) 586-9772 Mail form to: Oil & Gas Survey Email address: U.S. Department of Energy Ben Franklin Station PO Box 279 Washington, DC 20044-0279 Questions? Call toll free: 1-800-638-8812 PADD 4 Type of Report (Check One ): (Thousands of dollars) (Thousands of barrels) PADD 2 PADD 3 PAD DISTRICT (a) Revision to Report:

306

Deformation and Fracture Properties in Neutron Irradiated Pure Mo and Mo Alloys  

SciTech Connect

The effect of neutron irradiation on the mechanical properties of select molybdenum materials, pure low carbon arc-cast (LCAC) Mo, Mo-0.5% Ti-0.1% Zr (TZM) alloy, and oxide dispersion-strengthened (ODS) Mo alloy, was characterized by analyzing the temperature dependence of mechanical properties. This study assembles the tensile test and analysis data obtained through multiple series of irradiation and post-irradiation experiments. Tensile specimens in stress-relieved conditions with longitudinal (LSR) and transverse (TSR) directions were irradiated in high flux isotope reactor (HFIR) at temperatures ranging 270 to 1100oC to 0.6 -13.1 dpa. Also, the recrystallized LCAC Mo specimens in the longitudinal direction (LR) were also irradiated up to 0.28 dpa at ~80oC. Tensile tests were performed at temperatures ranging from -194 oC to 1400oC. Analysis results indicate that the irradiation at temperatures below 700oC increased strength significantly, up to 170%, while the increase of yield stress by irradiations at higher temperature was not significant. The plastic instability stress was strongly dependent on test temperature but was nearly independent of irradiation dose and temperature. The true fracture stress was dependent on test temperature to a lesser degree than was the yield stress and plastic instability stress. It was also slightly impacted by irradiation, depending on both irradiation and test temperatures. Brittle fracture often occurred in the LSR specimens tested at room temperature or lower after low temperature irradiation, while it was observed in many irradiated TSR specimens over the whole test temperature range. The ODS-LSR specimens showed the highest resistance to irradiation embrittlement due to relatively higher fracture stress. The critical temperature for shear failure (CTSF) was defined and evaluated for the materials, and the CTSF values were compared with the ductile to brittle transition temperatures (DBTT) based on ductility data.

Byun, Thak Sang [ORNL; Li, Meimei [ORNL; Cockeram, Brian V [Bechtel-Bettis, Inc.; Snead, Lance Lewis [ORNL

2008-01-01T23:59:59.000Z

307

SUITABILITY OF MAGNESIUM OXIDE AS A VISAR WINDOW  

SciTech Connect

Impedance matching of a velocity interferometer for any reflector (VISAR) window to a material under study helps simplify a shock experiment by effectively allowing one to measure an in situ particle velocity. The shock impedance of magnesium oxide (MgO) falls roughly midway between those of sapphire and LiF, two of the most frequently used VISAR window materials. A series of symmetric impact experiments was performed to characterize the suitability of single crystal, (100) oriented magnesium oxide as a VISAR window material. These experiments yielded good results and show the viability of MgO as a VISAR window up to 23 GPa. Results were used to determine window correction factors and, subsequently, to estimate the pressure induced change in index of refraction. In many of the shots in this work we exceeded the Hugoniot elastic limit (HEL) of MgO, and both elastic and plastic waves are evident in the velocity profiles. The presence of both waves within the VISAR window complicates the typical VISAR window correction analysis. Preliminary analysis of the elastic and plastic contributions to the window correction is presented.

G. D. Stevens; L. R. Veeser; P. A. Rigg; R. S. Hixson

2005-01-01T23:59:59.000Z

308

Investigation of Deformation Dynamics in a Wrought Magnesium Alloy  

SciTech Connect

In the present research, the deformation dynamics and the effect of the deformation history on plastic deformation in a wrought magnesium alloy have been studied using real-time in-situ neutron diffraction measurements under a continuous loading condition and elastic-viscoplastic self-consistent (EVPSC) polycrystal modeling. The experimental results reveal that the pre-deformation delayed the activation of the tensile twinning during subsequent compression, mainly resulting from the residual strain. No apparent detwinning occurred during unloading and even in the elastic region during reverse loading. It is believed that the grain rotation played an important role in the elastic region during reverse loading. The EVPSC model, which has been recently updated by implementing the twinning and detwinning model, was employed to characterize the deformation mechanism during the strain-path changes. The simulation result predicts well the experimental observation from the real-time in-situ neutron diffraction measurements. The present study provides a deep insight of the nature of deformation mechanisms in a hexagonal close-packed structured polycrystalline wrought magnesium alloy, which might lead to a new era of deformation-mechanism research.

Wu, Wei [ORNL; Qiao, Hua [McMaster University; An, Ke [ORNL; Wu, Peidong [McMaster University; Liaw, Peter K [University of Tennessee, Knoxville (UTK)

2014-01-01T23:59:59.000Z

309

The Variation of Magnesium Depletion with Line of Sight Conditions  

E-Print Network (OSTI)

In this paper we report on the gas-phase abundance of singly-ionized magnesium (Mg II) in 44 lines of sight, using data from the Hubble Space Telescope (HST). We measure Mg II column densities by analyzing medium- and high-resolution archival STIS spectra of the 1240 A doublet of Mg II. We find that Mg II depletion is correlated with many line of sight parameters (e.g. F(H_2), E_(B-V), E_(B-V)/r, A_V, and A_V/r) in addition to the well-known correlation with . These parameters should be more directly related to dust content and thus have more physical significance with regard to the depletion of elements such as magnesium. We examine the significance of these additional correlations as compared to the known correlation between Mg II depletion and . While none of the correlations are better predictors of Mg II depletion than , some are statistically significant even assuming fixed . We discuss the ranges over which these correlations are valid, their strength at fixed , and physical interpretations.

Adam G. Jensen; Theodore P. Snow

2007-10-04T23:59:59.000Z

310

Pneumatic conveying of coal and coal-limestone mixtures as applied to atmospheric fluidized-bed combustion. [Effects of moisture, velocity, particle size  

SciTech Connect

Pneumatic conveying experiments with coal and coal-limestone mixtures were performed on a conveying system designed to represent the feed lines in the Tennessee Valley Authority 20 MW atmospheric fluidized bed combustor. The experimental conditions were chosen to cover the anticipated combustor operating ranges. The results have led to a fundamental understanding of the operating limits associated with coal surface moisture, air velocity, coal and limestone fines, solids to air ratio, and limestone to coal ratio. Coal surface moisture was found to be the most important parameter affecting handling and transport. Specific upper limits for surface moisture were established. It was demonstrated that addition of dry limestone can reduce the conveying problems associated with wet coal. The air velocities causing saltation and surge flow were determined for a variety of conveying conditions. These velocities were related qualitatively to solids to air ratio, particle size, and surface moisture. Conveying pressure drop was also measured for a variety of conditions. In the absence of saltation, the horizontal, frictional pressure drop was only a function of the solids to air ratio and the air flow conditions. Comparison of the ORNL pressure drop data with the results of other investigators had led to the conclusion that there are two basic modes of flow in dilute-phase conveying; a primarily viscous mode and a primarily inertial mode. A general pressure drop model has been developed for the inertial mode.

Daw, C S; Thomas, J F

1982-01-01T23:59:59.000Z

311

ReaxFFMgH Reactive Force Field for Magnesium Hydride Systems Sam Cheung, Wei-Qiao Deng, Adri C. T. van Duin, and William A. Goddard III*  

E-Print Network (OSTI)

ReaxFFMgH Reactive Force Field for Magnesium Hydride Systems Sam Cheung, Wei-Qiao Deng, Adri C. TFFMgH) for magnesium and magnesium hydride systems. The parameters for this force field were derived from fitting to quantum chemical (QM) data on magnesium clusters and on the equations of states for condensed phases

van Duin, Adri

312

Studies on the inuence of chloride ion and pH on the corrosion and electrochemical behaviour of AZ91D magnesium alloy  

E-Print Network (OSTI)

91D magnesium alloy R. AMBAT, N.N. AUNG and W. ZHOU School of Mechanical and Production Engineering in revised form 20 January 2000 Key words: AZ91D alloy, chloride ion, corrosion, die-cast, ingot, magnesium of morphology. The corrosion product consisted of magnesium hydroxide, fallen b particles and magnesium

Zhou, Wei

313

Electrochemically Stable Cathode Current Collectors for Rechargeable Magnesium Batteries  

SciTech Connect

Rechargeable Mg batteries are attractive energy storage systems and could bring cost-effective energy solutions. Currently, however, no practical cathode current collectors that can withstand high voltages in Mg2+ electrolytes has been identified and therefore cathode research is greatly hindered. Here we identified that two metals, Mo and W, are electrochemically stable through formation of surface passive layers. The presented results could have significant impacts on the developments of high voltage Mg batteries.

Cheng, Yingwen; Liu, Tianbiao L.; Shao, Yuyan; Engelhard, Mark H.; Liu, Jun; Li, Guosheng

2014-01-01T23:59:59.000Z

314

DOE - Office of Legacy Management -- Spencer Chemical Co - MO 0-01  

Office of Legacy Management (LM)

MO 0-01 MO 0-01 FUSRAP Considered Sites Site: SPENCER CHEMICAL CO. (MO.0-01) Eliminated from further consideration under FUSRAP - an AEC licensed operation Designated Name: Not Designated Alternate Name: Jayhawk Works MO.0-01-1 Location: Joplin , Missouri MO.0-01-1 Evaluation Year: 1985 MO.0-01-2 Site Operations: Processed enriched uranium (UF-6) and scrap to produce primarily uranium dioxide (UO-2) under AEC licenses. MO.0-01-3 MO.0-01-4 Site Disposition: Eliminated - No Authority MO.0-01-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Normal and Enriched Uranium, Thorium MO.0-01-6 Radiological Survey(s): Yes MO.0-01-5 Site Status: Eliminated from further consideration under FUSRAP - an AEC licensed operation Also see Documents Related to SPENCER CHEMICAL CO.

315

DOE - Office of Legacy Management -- Tyson Valley Powder Farm - MO 11  

Office of Legacy Management (LM)

Tyson Valley Powder Farm - MO 11 Tyson Valley Powder Farm - MO 11 FUSRAP Considered Sites Site: TYSON VALLEY POWDER FARM (MO.11) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: St. Louis County , Missouri MO.11-1 Evaluation Year: 1987 MO.11-2 Site Operations: Storage of C-Special material (residue from production of uranium metal). MO.11-1 MO.11-2 MO.11-3 Site Disposition: Eliminated - Referred to Army Corps of Engineers MO.11-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium MO.11-3 Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP Also see Documents Related to TYSON VALLEY POWDER FARM MO.11-1 - Letter; Dickenson to Duff; Subject: Granted continued use

316

Honeywell Modular Automation System Computer Software Documentation for the Magnesium Hydroxide Precipitation Process  

SciTech Connect

The purpose of this Computer Software Document (CSWD) is to provide configuration control of the Honeywell Modular Automation System (MAS) in use at the Plutonium Finishing Plant (PFP) for the Magnesium Hydroxide Precipitation Process in Rm 230C/234-5Z. The magnesium hydroxide process control software Rev 0 is being updated to include control programming for a second hot plate. The process control programming was performed by the system administrator. Software testing for the additional hot plate was performed per PFP Job Control Work Package 2Z-00-1703. The software testing was verified by Quality Control to comply with OSD-Z-184-00044, Magnesium Hydroxide Precipitation Process.

STUBBS, A.M.

2001-06-25T23:59:59.000Z

317

Climate VISION: Private Sector Initiatives: Magnesium: Resources and Links  

Office of Scientific and Technical Information (OSTI)

Software Tools Software Tools The magnesium industry intends to eliminate emissions of SF6 by evaluating and adopting environmentally friendly alternative protective cover gases. The industry may also seek to improve its energy efficiency and therefore reduce its CO2 emissions. DOE has developed the following software tools that may assist companies in such efforts. DOE BestPractices Software Tools DOE BestPractices offers a range of software tools and databases that help manufacturers assess their plant's steam, compressed air, motor, and process heating systems. DOE Plant Energy Profiler Industry experience has shown that many plant utility personnel do not have an adequate understanding of their energy cost structure and where the major focus should be for any energy savings program. This tool will

318

Climate VISION: Private Sector Initiatives: Magnesium: Resources and Links  

Office of Scientific and Technical Information (OSTI)

Plant Assessments Plant Assessments Greenhouse Gas Protocol (PDF 190 KB) Download Acrobat Reader Paper written by Bill Palmer, Cheminfo Services, Inc. Molten magnesium and its alloys are volatile substances that have a tendency to oxidize explosively in air and require surface protection in casting processes. Save Energy Now Assessments The Save Energy Now assessments program is one way for plants of all sizes to work with the DOE Industrial Technologies Program (ITP). Large plants are eligible to apply for a system level assessment on their steam, process heating, compressed air, fans, or pumping systems. Assessments are conducted over a three day site visit by teams of DOE Energy Experts and plant personnel. The plant personnel are trained to identify energy savings opportunities using the DOE software tools. Most plants find an average of

319

Modeling the strength and ductility of magnesium alloys containing nanotwins  

SciTech Connect

Magnesium alloys have been receiving much attention recently as potential lightweight alternatives to steel for automotive and other applications, but the poor formability of these alloys at low temperatures has limited their widespread adoption for automotive applications. Recent work with face centered cubic (FCC) materials has shown that introduction of twins at the nanometer scale in ultra-fine grained FCC polycrystals can provide significant increase in strength with a simultaneous improvement in ductility. This objective of this work is to explore the feasibility of extending this concept to hexagonal close packed (HCP) materials, with particular focus on using this approach to increase both strength and ductility of magnesium alloys. A crystal plasticity based finite element (CPFE) model is used to study the effect of varying the crystallographic texture and the spacing between the nanoscale twins on the strength and ductility of HCP polycrystals. Deformation of the material is assumed to occur by crystallographic slip, and in addition to the basal and prismatic slip systems, slip is also assumed to occur on the {1 0 -1 1} planes that are associated with compression twins in these materials. The slip system strength of the pyramidal systems containing the nanotwins is assumed to be much lower than the strength of the other systems, which is assumed to scale with the spacing between the nanotwins. The CPFE model is used to compute the stress-strain response for different microstrucrutral parameters, and a criterion based on a critical slip system shear strain and a critical hydrostatic stress is used to compute the limiting strength and ductility, with the ultimate goal of identifying the texture and nanotwin spacing that can lead to the optimum values for these parameters.

Gorti, Sarma B [ORNL; Radhakrishnan, Balasubramaniam [ORNL

2013-01-01T23:59:59.000Z

320

Doping mechanisms in graphene-MoS{sub 2} hybrids  

SciTech Connect

We present a joint theoretical and experimental investigation of charge doping and electronic potential landscapes in hybrid structures composed of graphene and semiconducting single layer molybdenum disulfide (MoS{sub 2}). From first-principles simulations, we find electron doping of graphene due to the presence of rhenium impurities in MoS{sub 2}. Furthermore, we show that MoS{sub 2} edges give rise to charge reordering and a potential shift in graphene, which can be controlled through external gate voltages. The interplay of edge and impurity effects allows the use of the graphene-MoS{sub 2} hybrid as a photodetector. Spatially resolved photocurrent signals can be used to resolve potential gradients and local doping levels in the sample.

Sachs, B., E-mail: bsachs@physnet.uni-hamburg.de; Lichtenstein, A. I. [I. Institut fr Theoretische Physik, Universitt Hamburg, Jungiusstrae 9, D-20355 Hamburg (Germany)] [I. Institut fr Theoretische Physik, Universitt Hamburg, Jungiusstrae 9, D-20355 Hamburg (Germany); Britnell, L.; Eckmann, A.; Novoselov, K. S. [School of Physics and Astronomy, University of Manchester, M13 9PL Manchester (United Kingdom)] [School of Physics and Astronomy, University of Manchester, M13 9PL Manchester (United Kingdom); Wehling, T. O. [Institut fr Theoretische Physik, Universitt Bremen, Otto-Hahn-Allee 1, D-28359 Bremen (Germany) [Institut fr Theoretische Physik, Universitt Bremen, Otto-Hahn-Allee 1, D-28359 Bremen (Germany); Bremen Center for Computational Materials Science, Universitt Bremen, Am Fallturm 1a, D-28359 Bremen (Germany); Jalil, R.; Belle, B. D. [Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, Manchester M13 9PL (United Kingdom)] [Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, Manchester M13 9PL (United Kingdom); Katsnelson, M. I. [Institute for Molecules and Materials, Radboud University of Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen (Netherlands)] [Institute for Molecules and Materials, Radboud University of Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen (Netherlands)

2013-12-16T23:59:59.000Z

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


321

9 Cr-- 1 Mo steel material for high temperature application  

DOE Patents (OSTI)

One or more embodiments relates to a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650.degree. C. The 9 Cr-1 Mo steel has a tempered martensite microstructure and is comprised of both large (0.5-3 .mu.m) primary titanium carbides and small (5-50 nm) secondary titanium carbides in a ratio of. from about 1:1.5 to about 1.5:1. The 9 Cr-1 Mo steel may be fabricated using exemplary austenizing, rapid cooling, and tempering steps without subsequent hot working requirements. The 9 Cr-1 Mo steel exhibits improvements in total mass gain, yield strength, and time-to-rupture over ASTM P91 and ASTM P92 at the temperature and time conditions examined.

Jablonski, Paul D; Alman, David; Dogan, Omer; Holcomb, Gordon; Cowen, Christopher

2012-11-27T23:59:59.000Z

322

EUV damage threshold measurements of Mo/Si multilayer mirrors  

Science Journals Connector (OSTI)

An EUV Schwarzschild objective consisting of two spherical, annular mirror substrates coated with Mo/Si multilayers (reflectivity...R?0.65@13.5nm) provides high EUV fluences [13]. The incidence angles on the sam...

Matthias Mller; Frank Barkusky; Torsten Feigl; Klaus Mann

2012-08-01T23:59:59.000Z

323

Q value of the 100Mo Double-Beta Decay  

E-Print Network (OSTI)

Penning trap measurements using mixed beams of 100Mo - 100Ru and 76Ge - 76Se have been utilized to determine the double-beta decay Q-values of 100Mo and 76Ge with uncertainties less than 200 eV. The value for 76Ge, 2039.04(16) keV is in agreement with the published SMILETRAP value. The new value for 100Mo, 3034.40(17) keV is 30 times more precise than the previous literature value, sufficient for the ongoing neutrinoless double-beta decay searches in 100Mo. Moreover, the precise Q-value is used to calculate the phase-space integrals and the experimental nuclear matrix element of double-beta decay.

S. Rahaman; V. -V. Elomaa; T. Eronen; J. Hakala; A. Jokinen; J. Julin; A. Kankainen; A. Saastamoinen; J. Suhonen; C. Weber; J. yst

2007-12-20T23:59:59.000Z

324

The effects of calcitic and dolomitic limestone rates and particle sizes on soil chemical changes, plant nutrient concentration, and yields of corn and Coastal bermudagrass on two acid Texas soils  

E-Print Network (OSTI)

Directed by Dr. Warren B. Anderson Two, 4, snd 6 tons/ acre of calcitic and dolomitic limestone in three particle size ranges were disked into a Katy fine sandy loam prior to planting corn. Identical treatments were broadcast on a Boy loamy fine sand... neutralized soil acidity faster than did the dolomitic source. All calcitic limestone treatments significantly increased Ca in the surface 6 inches of soil. The 4- and 6-ton/acre rates of fine, and the 6-ton/acre rate of medium calcitic limestone...

Haby, Vincent A

2012-06-07T23:59:59.000Z

325

1 Mo 1 Do 1 Sa 1 Di 1 Fr 1 Fr 1 Mo 1 Mi 1 Sa 1 Mo 1 Do 1 So 2 Di 2 Fr 2 So 2 Mi 2 Sa 2 Sa 2 Di 2 Do 2 So 2 Di 2 Fr 2 Mo  

E-Print Network (OSTI)

1 Mo 1 Do 1 Sa 1 Di 1 Fr 1 Fr 1 Mo 1 Mi 1 Sa 1 Mo 1 Do 1 So 2 Di 2 Fr 2 So 2 Mi 2 Sa 2 Sa 2 Di 2 Do 2 So 2 Di 2 Fr 2 Mo 3 Mi 3 Sa 3 Mo 3 Do 3 So 3 So 3 Mi 3 Fr 3 Mo 3 Mi 3 Sa 3 Di 4 Do 4 So 4 Di 4 Fr 4 Mo 4 Mo 4 Do 4 Sa 4 Di 4 Do P StAU4 So 4 Mi 5 Fr 5 Mo 5 Mi 5 Sa 5 Di 5 Di 5 Fr 5 So 5 Mi 5 Fr 5 Mo

Mayberry, Marty

326

X-RAY ABSORPTION SPECTROSCOPY OF TRANSITION METAL-MAGNESIUM HYDRIDE FILMS  

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

Spectroscopy of Transition Metal-Magnesium Spectroscopy of Transition Metal-Magnesium Hydride Thin Films T. J. Richardson a, *, B. Farangis a , J. L. Slack a , P. Nachimuthu b , R. Pereira b , N. Tamura b , and M. Rubin a a Environmental Energy Technologies Division, b Advanced Light Source, Ernest Orlando Lawrence Berkeley National Laboratory Berkeley, California 94720, USA *Corresponding author, E-mail address: tjrichardson@lbl.gov Abstract Mixed metal thin films containing magnesium and a first-row transition element exhibit very large changes in both reflectance and transmittance on exposure to hydrogen gas. Changes in electronic structure and coordination of the magnesium and transition metal atoms during hydrogen absorption were studied using dynamic in situ transmission mode X-ray absorption

327

E-Print Network 3.0 - ammonium calcium magnesium Sample Search...  

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

bres Summary: IP accumulation (97.862.1%) (Fig. 8). the osmolality with magnesium. Removal of extracellular1 calcium resulted... of HIP accumulation in the1 1 1 45 21...

328

Development of magnesium-based multilayer PVD coatings for hydrogen storage applications.  

E-Print Network (OSTI)

??On the long list of solid-state hydrogen storage materials, magnesium hydride stands out for its relatively high hydrogen storage capacity of 7.7 wt%, combined with (more)

Fry, Christopher

2013-01-01T23:59:59.000Z

329

High-strain-rate nanoindentation behavior of fine-grained magnesium alloys  

E-Print Network (OSTI)

The effects of temperature and alloying elements on deformation in the high-strain-rate regime were investigated by testing fine-grained magnesium alloys with an average grain size of 2 ? 3 ?m by a nanoindentation technique. ...

Somekawa, Hidetoshi

330

Quasiparticle lifetimes in magnesium clusters modeled by self-consistent GW? calculations  

E-Print Network (OSTI)

Quasiparticle (QP) lifetimes in magnesium clusters are calculated using many-body Green's-function theory. We analyze the effect of the self-consistency of the one-particle Green's function G on the calculations and ...

He, Yi

331

Crystal Plasticity Modelling of Large Strain Deformation in Single Crystals of Magnesium.  

E-Print Network (OSTI)

??Magnesium, with a Hexagonal Close-Packed (HCP) structure, is the eighth most abundant element in the earths crust and the third most plentiful element dissolved in (more)

Izadbakhsh, Adel

2010-01-01T23:59:59.000Z

332

Effect of Texture on Formability and Mechanical Anisotropy of a Severe Plastically Deformed Magnesium Alloy  

E-Print Network (OSTI)

Magnesium and its alloys have been considered as alternatives to aluminum alloys and steels for structural applications in automotive and aerospace applications due to their superior specific strength and light-weight. However, they have hexagonal...

Modarres Razavi, Sonia

2012-02-14T23:59:59.000Z

333

Controlling the degradation rate of bioactive magnesium implants by electrophoretic deposition of akermanite coating  

Science Journals Connector (OSTI)

Abstract In order to improve the corrosion resistance and the surface bioactivity of biodegradable magnesium alloys, a nanostructured akermanite (Ca2MgSi2O7) coating was grown on AZ91 magnesium alloy through electrophoretic deposition (EPD) assisted with micro arc oxidation (MAO) method. The crystalline structures, morphologies and compositions of samples were characterized by Xray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The in vitro biocorrosion (biodegradability) and bioactivity behaviors of samples were investigated by electrochemical and immersion tests. The experimental results indicated that the nanostructured akermanite coating could slow down the corrosion rate and improve the in vitro bioactivity of biodegradable magnesium alloy. Thus, magnesium alloy coated with nanostructured akermanite may be a promising candidate to be used as biodegradable bone implants.

Mehdi Razavi; Mohammadhossein Fathi; Omid Savabi; Seyed Mohammad Razavi; Batoul Hashemi Beni; Daryoosh Vashaee; Lobat Tayebi

2014-01-01T23:59:59.000Z

334

Vehicle Technologies Office: Long-Term Lightweight Materials Research (Magnesium and Carbon Fiber)  

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

The Vehicle Technologies Office supports research into magnesium and carbon fiber reinforced composites, which could reduce the weight of some components by 50-75 percent in the long-term.

335

Magnesium and pyridoxine intake and mineral content of selected tissues and physical development in rats  

E-Print Network (OSTI)

MAGNESIUM AND PYRIDOXINE INTAKE MINERAL CONTENT OF SELECTED TISSUES PHYSICAL DEVELOPMENT IN RATS A Thesis by SU S AN ELA I NE EDGAR Submitted to the Graduate College of Texas A8rM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1986 Major Subject: Nutrition MAGNESIUM AND PYRIDOXINE INTAKE MINERAL CONTENT OF SELECTED TISSUES PHYS ICAL DEVELOPMENT IN RATS A Thesis by SUSAN ELAINE EDGAR Approved as to style and content by: 'KAREN...

Edgar, Susan Elaine

2012-06-07T23:59:59.000Z

336

Determination of the concentrations of magnesium and aluminum in alloys by laser produced atomic emission spectroscopy  

E-Print Network (OSTI)

DETERMINATION OF THE CONCENTRATIONS OF MAGNESIUM AND ALUiiINUM IN ALLOYS BY LASER PRODUCED ATOMIC EMISSION SPECTROSCOPY A Thesis by WILLIAM MONROE ASHE Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the reqmrements for the degree of MASTER OF SCIENCE December 1997 Major Subject: Physics DETERMINATION OF THE CONCENTRATIONS OF MAGNESIUM AND ALUMINUM ALLOYS BY LASER PRODUCED ATOMIC EMISSION SPECTROSCOPY A Thesis by WILLIAM MONROE ASHE...

Ashe, William Monroe

2012-06-07T23:59:59.000Z

337

An examination of the relationship between calcium and magnesium and hypertension  

E-Print Network (OSTI)

AN EXAMINATION QF Tl-IE RELATIONSHIP BETWEEN CALCILIM AND MAGNESIUM AND HYPERTENSION A Thesis by MARY ELIZABETH GEORGHIADES Submitted to the Graduate College of Texas ARM University in partial Fulfillment of the requirements For the degree... of MASTER QF SCIENCE May 1988 Major Subject. : Nutrition AN EXAMINATION OF THE RELATIONSHIP BETWEEN CALCIUM AND MAGNESIUM AND HYPERTENSION A Thesis by MARY ELIZABETH GEORGH I ADES Approved as to style and content by: Karen S. Kubena (Chair...

Georghiades, Mary Elizabeth

2012-06-07T23:59:59.000Z

338

Effects of Dietary Magnesium Status on Indices of Muscular Dysfunction in Exercising Horses  

E-Print Network (OSTI)

EFFECT OF DIETARY MAGNESIUM STATUS ON INDICES OF MUSCULAR DYSFUNCTION IN EXERCISING HORSES A Thesis by CASSIDY ANNALIESE KURTZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2009 Major Subject: Animal Science EFFECT OF DIETARY MAGNESIUM STATUS ON INDICES OF MUSCULAR DYSFUNCTION IN EXERCISING HORSES A Thesis by CASSIDY ANNALIESE KURTZ...

Kurtz, Cassidy A.

2011-02-22T23:59:59.000Z

339

X-Ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin  

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

X-Ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin X-Ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin Films Title X-Ray Absorption Spectroscopy of Transition Metal-Magnesium Hydride Thin Films Publication Type Journal Article LBNL Report Number LBNL-50574 Year of Publication 2002 Authors Richardson, Thomas J., Baker Farangis, Jonathan L. Slack, Ponnusamy Nachimuthu, Rupert C. C. Perera, Nobumichi Tamura, and Michael D. Rubin Journal Journal of Alloys and Compounds Volume 356-357 Start Page 204 Pagination 204-207 Date Published 08/2003 Keywords A. hydrogen storage materials, NEXAFS, thin film s; C. EXAFS, x-ray diffraction Abstract Mixed metal thin films containing magnesium and a first-row transition element exhibit very large changes in both reflectance and transmittance on exposure to hydrogen gas. Changes in electronic structure and coordination of the magnesium and transition metal atoms during hydrogen absorption were studied using dynamic in situ transmission mode X-ray absorption spectroscopy. Mg K-edge and Ni, Co, and Ti L-edge spectra reflect both reversible and irreversible changes in the metal environments. A significant shift in the nickel L absorption edge shows it to be an active participant in hydride formation. The effect on cobalt and titanium is much less dramatic, suggesting that these metals act primarily as catalysts for formation of magnesium hydride.

340

Experimental study of a structural magnesium alloy with high absorption energy under dynamic loading  

SciTech Connect

It has been demonstrated that pure Mg exhibits low ductility under dynamic loading at room temperature owing to its HCP structure. Very limited data are currently available for magnesium alloys under dynamic loading. In order to be used for structural components, it is necessary to improve the mechanical properties of magnesium alloys. Lahaise et al. reported the yield strength of the AZ91 magnesium alloy increased with refining its microstructure. Mohri et al. has already been reported the ductility enhancement of a Mg-Y-RE(Rare Earth) alloy by hot extrusion. They mentioned the enhancement of ductility is due to the refining microstructure of magnesium. Thus refining microstructure enables to raise the possibility for the development of a structural magnesium alloy with high ductility at dynamic strain rate. In this paper, the possibility of a fine-grained WE43 magnesium alloy is investigated to raise the high speed impact performance against the foreign object damage by the enhancement of ductility and absorption energy under dynamic loading.

Mukai, T.; Ishikawa, K. [Osaka Municipal Technical Research Inst. (Japan). Mechanical Engineering Dept.] [Osaka Municipal Technical Research Inst. (Japan). Mechanical Engineering Dept.; Mohri, T. [Nagoya Municipal Industrial Research Inst. Rokuban, Atsuta (Japan)] [Nagoya Municipal Industrial Research Inst. Rokuban, Atsuta (Japan); Nakamura, M. [National Industrial Research Inst., Nagoya (Japan)] [National Industrial Research Inst., Nagoya (Japan); Higashi, K. [Osaka Prefecture Univ., Sakai (Japan)] [Osaka Prefecture Univ., Sakai (Japan)

1998-10-05T23:59:59.000Z

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


341

The production of higher alcohols from syngas using potassium promoted Co/Mo/A12O3 and Rh/Co/Mo/A12O3  

Science Journals Connector (OSTI)

The optimized compositions K(4.9)/Co(2.7)/Mo(6.4)/A1203(gamma) and K(1.2)/ Rh(1.1)/Co(0.6)/Mo(5.7)/A1203(gamma) are both productive catalysts for higher alcohols. The incorporation of rhodium into the K/Co/Mo/A12

D. A. Storm

1995-01-01T23:59:59.000Z

342

Coated U(Mo) Fuel: As-Fabricated Microstructures  

SciTech Connect

As part of the development of low-enriched uranium fuels, fuel plates have recently been tested in the BR-2 reactor as part of the SELENIUM experiment. These fuel plates contained fuel particles with either Si or ZrN thin film coating (up to 1 m thickness) around the U-7Mo fuel particles. In order to best understand irradiation performance, it is important to determine the starting microstructure that can be observed in as-fabricated fuel plates. To this end, detailed microstructural characterization was performed on ZrN and Si-coated U-7Mo powder in samples taken from AA6061-clad fuel plates fabricated at 500C. Of interest was the condition of the thin film coatings after fabrication at a relatively high temperature. Both scanning electron microscopy and transmission electron microscopy were employed. The ZrN thin film coating was observed to consist of columns comprised of very fine ZrN grains. Relatively large amounts of porosity could be found in some areas of the thin film, along with an enrichment of oxygen around each of the the ZrN columns. In the case of the pure Si thin film coating sample, a (U,Mo,Al,Si) interaction layer was observed around the U-7Mo particles. Apparently, the Si reacted with the U-7Mo and Al matrix during fuel plate fabrication at 500C to form this layer. The microstructure of the formed layer is very similar to those that form in U-7Mo versus Al-Si alloy diffusion couples annealed at higher temperatures and as-fabricated U-7Mo dispersion fuel plates with Al-Si alloy matrix fabricated at 500C.

Emmanuel Perez; Dennis D. Keiser, Jr.; Ann Leenaers; Sven Van den Berghe; Tom Wiencek

2014-04-01T23:59:59.000Z

343

A study of the effects of limestone rock asphalt screenings on the structural properties of hot-mix asphaltic concrete made with siliceous materials  

E-Print Network (OSTI)

School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1958 Major Subject: Civil Engineering A STUDY OF THE EFFECTS OF LIMESTONE ROCK ASPHALT SCREENINGS... to Bob M. Gallaway, Associate Pro- fessor of Civil Engineering, without whose guidance and inspiration this work would not have been possible; to Charles J. Keese, Asso- ciate Professor of Civil Engineering, for valued advice and criticism; to Dr. E...

Albritton, Oscar Willard

1958-01-01T23:59:59.000Z

344

Limestone calcination with CO{sub 2} capture (II): decomposition in CO{sub 2}/steam and CO{sub 2}/N{sub 2} atmospheres  

SciTech Connect

Decomposition of limestone particles (0.25-0.5 mm) in a steam dilution atmosphere (20-100% steam in CO{sub 2}) was investigated by using a continuously operating fluidized bed reactor for CO{sub 2} capture. The decomposition conversion of limestone increased as the steam dilution percentage in the CO{sub 2} supply gas increased. At a bed temperature of 1193 K, the conversions were 72% without dilution (100% CO{sub 2}) and 98% with 60% steam dilution. The decomposition conversions obtained with steam dilution and N{sub 2} dilution differed significantly, and this result is explained in terms of the difference between the heat transfer to particle in steam and N{sub 2} dilution atmosphere. The reactivities of the CaO produced from limestone decomposition with steam dilution and without dilution (100% CO{sub 2}) were tested by means of hydration and carbonation reactions. In the hydration test, the time required for complete conversion (CaO{yields}Ca(OH){sub 2}) of the CaO produced by steam dilution was approximately half that required for the CaO produced without dilution. In the carbonation test, carbonation conversion (CaO{yields}CaCO{sub 3}) of the CaO produced by steam dilution was approximately 70%, whereas the conversion was approximately 40% for the CaO produced without dilution. 17 refs., 8 figs., 5 tabs.

Yin Wang; Shiying Lin; Yoshizo Suzuki [National Institute of Advanced Industrial Science and Technology, Ibaraki (Japan)

2008-07-15T23:59:59.000Z

345

The interaction of nitrogen and magnesium deficiences in certain aspects of the physiology of the cotton plant  

E-Print Network (OSTI)

effective in raising the phos- phorous content of peas. Their results support the theory that magnesium functions as a carrier of phosphorous. They also point out the need of giving more attention to the magnesium status of agricultural soils with a view... and magnesium deficiencies occurring in the same plant as developed under the experimental conditions stated above. Oftentimes poor growth of plants in the field may result from the lack of two or mox'e nutrients and such simultaneous characterization...

Ghosh, Debabrata

2012-06-07T23:59:59.000Z

346

The effects of a suboptimal intake of magnesium with soy protein concentrate on parturition, growth, and viability in the rat  

E-Print Network (OSTI)

no apparent hormonal homeostatic mechanism exists for regulation of serum magnesium, the normal range results from a balance between gastrointestinal absorption and renal excretion. Factors influencing absorption of magnesium include dietary intake... populations remains to be established. Another abnormality associated with magnesium deficiency concerns the parathyroid gland which is the primary homeostatic mechanism that controls the plasma calcium concentration. PTH release is related to the total...

Carson, Sonja D'Awn

2012-06-07T23:59:59.000Z

347

Selective gas adsorption in a magnesium-based metalorganic Young Eun Cheon, Jungeun Park and Myunghyun Paik Suh*  

E-Print Network (OSTI)

Selective gas adsorption in a magnesium-based metal­organic frameworkw Young Eun Cheon, Jungeun magnesium-based porous metal­ organic framework exhibits thermal stability up to 500 1C and selective gas interpenetrated magnesium- based MOF, [Mg(TCPBDA)(H2O)2]Á6DMFÁ6H2O (1), where TCPBDA2? is N,N,N0 ,N0 -tetrakis(4

Paik Suh, Myunghyun

348

Investigation of the reaction zone between TiAl and Mo  

SciTech Connect

Pure Mo was incorporated in TiAl matrix via two different routes: (1) hot pressing of alternately sandwiched Ti-Al sheets and Mo foils; and (2) coextrusion and heat treatment of Ti-Al green compact and Mo rod. The reaction zone between TiAl and Mo is found to contain two intermetallic phases: {beta}-(Mo,Ti)Al and {rho}-(Mo,Ti){sub 3}Al. The {beta}-{rho} boundary is incoherent, whereas the TiAl-{beta} and {rho}-Mo boundaries are semicoherent. The reaction zone grows with increasing heat-treatment time in a parabolic form. The incorporated Mo exhibits lower hardness than the TiAl matrix, implying that ductilizing and toughening of TiAl by introducing Mo as a ductile reinforcement are possible.

Hsu, F.Y.; Klaar, H.J. [Aachen Univ. of Technology (Germany); Wang, G.X. [Zhejiang Univ., Hangzhou (China). Dept. of Materials Science and Engineering; Pirwitz, F. [GKSS Research Center, Geesthacht (Germany). Inst. for Materials Research

1996-08-01T23:59:59.000Z

349

Ab Initio Thermodynamic Model for Magnesium Carbonates and Hydrates  

SciTech Connect

An ab initio thermodynamic framework for predicting properties of hydrated magnesium carbonate minerals has been developed using density-functional theory linked to macroscopic thermodynamics through the experimental chemical potentials for MgO, water, and CO2. Including semiempirical dispersion via the Grimme method and small corrections to the generalized gradient approximation of Perdew, Burke, and Ernzerhof for the heat of formation yields a model with quantitative agreement for the benchmark minerals brucite, magnesite, nesquehonite, and hydromagnesite. The model shows how small differences in experimental conditions determine whether nesquehonite, hydromagnesite, or magnesite is the result of laboratory synthesis from carbonation of brucite, and what transformations are expected to occur on geological time scales. Because of the reliance on parameter-free first principles methods, the model is reliably extensible to experimental conditions not readily accessible to experiment and to any mineral composition for which the structure is known or can be hypothesized, including structures containing defects, substitutions, or transitional structures during solid state transformations induced by temperature changes or processes such as water, CO2, or O2 diffusion. Demonstrated applications of the ab initio thermodynamic framework include an independent means to evaluate differences in thermodynamic data for lansfordite, predicting the properties of Mg analogs of Ca-based hydrated carbonates monohydrocalcite and ikaite which have not been observed in nature, and an estimation of the thermodynamics of barringtonite from the stoichiometry and a single experimental observation.

Chaka, Anne M.; Felmy, Andrew R.

2014-03-28T23:59:59.000Z

350

Neutrino oscillation signatures of oxygen-neon-magnesium supernovae  

E-Print Network (OSTI)

We discuss the flavor conversion of neutrinos from core collapse supernovae that have oxygen-neon-magnesium (ONeMg) cores. Using the numerically calculated evolution of the star up to 650 ms post bounce, we find that, for the normal mass hierarchy, the electron neutrino flux in a detector shows signatures of two typical features of an ONeMg-core supernova: a sharp step in the density profile at the base of the He shell and a faster shock wave propagation compared to iron core supernovae. Before the shock hits the density step (t ~ 150 ms), the survival probability of electron neutrinos is about 0.68, in contrast to values of 0.32 or less for an iron core supernova. The passage of the shock through the step and its subsequent propagation cause a decrease of the survival probability and a decrease of the amplitude of oscillations in the Earth, reflecting the transition to a more adiabatic propagation inside the star. These changes affect the lower energy neutrinos first; they are faster and more sizable for larger theta_13. They are unique of ONeMg-core supernovae, and give the possibility to test the speed of the shock wave. The time modulation of the Earth effect and its negative sign at the neutronization peak are the most robust signatures in a detector.

C. Lunardini; B. Mueller; H. -Th. Janka

2007-12-18T23:59:59.000Z

351

MUTLI-OBJECTIVE OPTIMIZATION OF MICROSTRUCTURE IN WROUGHT MAGNESIUM ALLOYS  

SciTech Connect

The microstructural features that govern the mechanical properties of wrought magnesium alloys include grain size, crystallographic texture, and twinning. Several processes based on shear deformation have been developed that promote grain refinement, weakening of the basal texture, as well as the shift of the peak intensity away from the center of the basal pole figure - features that promote room temperature ductility in Mg alloys. At ORNL, we are currently exploring the concept of introducing nano-twins within sub-micron grains as a possible mechanism for simultaneously improving strength and ductility by exploiting a potential dislocation glide along the twin-matrix interface a mechanism that was originally proposed for face-centered cubic materials. Specifically, we have developed an integrated modeling and optimization framework in order to identify the combinations of grain size, texture and twin spacing that can maximize strength-ductility combinations. A micromechanical model that relates microstructure to material strength is coupled with a failure model that relates ductility to a critical shear strain and a critical hydrostatic stress. The micro-mechanical model is combined with an optimization tool based on genetic algorithm. A multi-objective optimization technique is used to explore the strength-ductility space in a systematic fashion and identify optimum combinations of the microstructural parameters that will simultaneously maximize the strength-ductility in the alloy.

Radhakrishnan, Balasubramaniam [ORNL] [ORNL; Gorti, Sarma B [ORNL] [ORNL; Simunovic, Srdjan [ORNL] [ORNL

2013-01-01T23:59:59.000Z

352

Magnesium Isotope Ratios in omega Centauri Red Giants  

E-Print Network (OSTI)

We have used high resolution observations obtained at the AAT with UHRF (R ~ 100,000) and at Gemini-S with b-HROS (R ~ 150,000) to determine magnesium isotope ratios for seven omega Centauri red giants that cover a range in iron abundance from [Fe/H] = --1.78 to --0.78 dex, and for two red giants in M4 (NGC 6121). The omega Centauri stars sample both the "primordial" (i.e., O-rich, Na and Al-poor) and the "extreme" (O-depleted, Na and Al-rich) populations in the cluster. The primordial population stars in both omega Centauri and M4 show (25Mg, 26Mg)/24 Mg isotopic ratios that are consistent with those found for the primordial population in other globular clusters with similar [Fe/H] values. The isotopic ratios for the omega Centauri extreme stars are also consistent with those for extreme population stars in other clusters. The results for the extreme population stars studied indicate that the 26Mg/24Mg ratio is highest at intermediate metallicities ([Fe/H] < --1.4 dex), and for the highest [Al/Fe] values....

Da Costa, G S; Yong, David

2013-01-01T23:59:59.000Z

353

Calcium orthophosphate coatings on magnesium and its biodegradable alloys  

Science Journals Connector (OSTI)

Abstract Biodegradable metals have been suggested as revolutionary biomaterials for bone-grafting therapies. Of these metals, magnesium (Mg) and its biodegradable alloys appear to be particularly attractive candidates due to their non-toxicity and as their mechanical properties match those of bones better than other metals do. Being light, biocompatible and biodegradable, Mg-based metallic implants have several advantages over other implantable metals currently in use, such as eliminating both the effects of stress shielding and the requirement of a second surgery for implant removal. Unfortunately, the fast degradation rates of Mg and its biodegradable alloys in the aggressive physiological environment impose limitations on their clinical applications. This necessitates development of implants with controlled degradation rates to match the kinetics of bone healing. Application of protective but biocompatible and biodegradable coatings able to delay the onset of Mg corrosion appears to be a reasonable solution. Since calcium orthophosphates are well tolerated by living organisms, they appear to be the excellent candidates for such coatings. Nevertheless, both the high chemical reactivity and the low melting point of Mg require specific parameters for successful deposition of calcium orthophosphate coatings. This review provides an overview of current coating techniques used for deposition of calcium orthophosphates on Mg and its biodegradable alloys. The literature analysis revealed that in all cases the calcium orthophosphate protective coatings both increased the corrosion resistance of Mg-based metallic biomaterials and improved their surface biocompatibility.

Sergey V. Dorozhkin

2014-01-01T23:59:59.000Z

354

MoWiTT:Mobile Window Thermal Test Facility  

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

0 0 MoWiTT: Mobile Window Thermal Test Facility The window has come a long way since the days when it was a single pane of glass in a wood frame. Low-emissivity windows were designed to help buildings retain some of the energy that would have leaked out of less efficient windows. Designing efficient window-and-frame systems requires accurate measurement of the flow of energy through windows in realistic conditions, a capability provided by the Mobile Window Thermal Test facility. Consisting of a pair of outdoor, room-sized calorimeters, MoWiTT measures the net energy flow through two window samples in side-by-side tests using ambient weather conditions. MoWiTT characterizes the net energy flow as a function of time and measures the temperatures, solar fluxes, and

355

Co-Mo Electric Coop Inc | Open Energy Information  

Open Energy Info (EERE)

Mo Electric Coop Inc Mo Electric Coop Inc Jump to: navigation, search Name Co-Mo Electric Coop Inc Place Missouri Utility Id 4063 Utility Location Yes Ownership C NERC Location SERC NERC MRO Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Commercial Multi-Phase Commercial Commercial Single-Phase Over 200 Amps Commercial Commercial Single-Phase Up To 200 Amps Commercial Industrial Industrial Outdoor Lighting HPS 100 W Lighting Outdoor Lighting HPS 150 W Lighting Outdoor Lighting HPS 400 W Lighting Residential Multi-Phase Residential Residential Single-Phase Over 200 Amps Residential

356

DOE - Office of Legacy Management -- Medart Co - MO 09  

Office of Legacy Management (LM)

Medart Co - MO 09 Medart Co - MO 09 FUSRAP Considered Sites Site: MEDART CO. (MO.09 ) Eliminated from consideration under FUSRAP - Facility believed to be torn down and the original site built over Designated Name: Not Designated Alternate Name: None Location: 180 Potomoc Street , St. Louis , Missouri MA.09-4 Evaluation Year: Circa 1990 MA.09-3 Site Operations: Conducted test machining operations on uranium bar stock during the early 1950s. MA.09-2 Site Disposition: Eliminated - Potential for contamination considered remote due limited duration of operations and to site reconstruction MA.09-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium Metal (test quantities) MA.09-3 Radiological Survey(s): Health and safety monitoring during operations MA.09-3

357

Permitting and solid waste management issues for the Bailly Station wet limestone Advanced Flue Gas Desulfurization (AFGD) system  

SciTech Connect

Pure Air (a general partnership between Air Products and Chemicals, Inc., and Mitsubishi Heavy Industries America, Inc.). is constructing a wet limestone co-current advanced flue gas desulfurization (AFGD) system that has technological and commercial advantages over conventional FGD systems in the United States. The AFGD system is being installed at the Northern Indiana Public Service Company's Bailly Generating Station near Gary, Indiana. The AFGD system is scheduled to be operational by the Summer, 1992. The AFGD system will remove at least 90 percent of the sulfur dioxide (SO{sub 2}) in the flue gas from Boilers 7 and 8 at the Station while burning 3.2 percent sulfur coal. Also as part of testing the AFGD system, 95 percent removal of SO{sub 2} will be demonstrated on coals containing up to 4.5 percent sulfur. At the same time that SO{sub 2} is removed from the flue gas, a gypsum by-product will be produced which will be used for wallboard manufacturing. Since the AFGD system is a pollution control device, one would expect its installation to be received favorably by the public and regulatory agencies. Although the project was well received by regulatory agencies, on public group (Save the Dunes Council) was initially concerned since the project is located adjacent to the Indiana Dunes National Lakeshore. The purpose of this paper is to describe the project team's experiences in obtaining permits/approvals from regulatory agencies and in dealing with the public. 1 ref., 1 fig., 2 tabs.

Bolinsky, F.T. (Pure Air, Allentown, PA (United States)); Ross, J. (Northern Indiana Public Service Co., Hammond, IN (United States)); Dennis, D.S. (United Engineers and Constructors, Inc., Denver, CO (United States). Stearns-Roger Div.); Huston, J.S. (Environmental Alternatives, Inc., Warren NJ (USA))

1991-01-01T23:59:59.000Z

358

MAGNESIUM MONO POTASSIUM PHOSPHATE GROUT FOR P-REACTOR VESSEL IN-SITU DECOMISSIONING  

SciTech Connect

The objective of this report is to document laboratory testing of magnesium mono potassium phosphate grouts for P-Reactor vessel in-situ decommissioning. Magnesium mono potassium phosphate cement-based grout was identified as candidate material for filling (physically stabilizing) the 105-P Reactor vessel (RV) because it is less alkaline than portland cement-based grout (pH of about 12.4). A less alkaline material ({<=} 10.5) was desired to address a potential materials compatibility issue caused by corrosion of aluminum metal in highly alkaline environments such as that encountered in portland cement grouts. Information concerning access points into the P-Reactor vessel and amount of aluminum metal in the vessel is provided elsewhere. Fresh and cured properties were measured for: (1) commercially blended magnesium mono potassium phosphate packaged grouts, (2) commercially available binders blended with inert fillers at SRNL, (3) grouts prepared from technical grade MgO and KH{sub 2}PO{sub 4} and inert fillers (quartz sands, Class F fly ash), and (4) Ceramicrete{reg_sign} magnesium mono potassium phosphate-based grouts prepared at Argonne National Laboratory. Boric acid was evaluated as a set retarder in the magnesium mono potassium phosphate mixes.

Langton, C.; Stefanko, D.

2011-01-05T23:59:59.000Z

359

Analysis of the flow imbalance on the profile shape during the extrusion of thin magnesium sheets  

SciTech Connect

The extrusion process facilitates the production of magnesium sheets featuring a very thin thickness as well as excellent surface properties by using a single process step only. However, the extrusion of the magnesium sheets applying not optimized process parameters, e.g. low billet temperature or/ and poorly deformable magnesium alloy, produce pronounced buckling and waving of the extruded sheets as well as a variation of accuracy in profile shape along the cross section. The present investigation focuses on the FEM-simulation of the extrusion of magnesium sheets in order to clarify the origin of the mentioned effects. The simulations identify the flow imbalance during extrusion as the main critical factor. Due to the flow imbalance after passing the die a large compression stress zone is formed causing the buckling and waving of the thin sheets. Furthermore, the simulations of the magnesium sheet extrusion reveal that the interaction of the material flow gradients along the width and along the thickness direction near the die orifice lead to the variation of the accuracy in profile shape.

Gall, Sven [Forschungszentrum Strangpressen, Technische Universitt Berlin, Gustav-Meyer-Allee 25, Berlin, 13355, Germany, and Metallische Werkstoffe, Technische Universitt Berlin, Ernst-Reuter-Platz 1, Berlin, 10587 (Germany); Mller, Sren [Forschungszentrum Strangpressen, Technische Universitt Berlin, Gustav-Meyer-Allee 25, Berlin, 13355 (Germany); Reimers, Walter [Metallische Werkstoffe, Technische Universitt Berlin, Ernst-Reuter-Platz 1, Berlin, 10587 (Germany)

2013-12-16T23:59:59.000Z

360

The viability of aluminum Zintl anion moieties within magnesium-aluminum clusters  

SciTech Connect

Through a synergetic combination of anion photoelectron spectroscopy and density functional theory based calculations, we have investigated the extent to which the aluminum moieties within selected magnesium-aluminum clusters are Zintl anions. Magnesium-aluminum cluster anions were generated in a pulsed arc discharge source. After mass selection, photoelectron spectra of Mg{sub m}Al{sub n}{sup ?} (m, n = 1,6; 2,5; 2,12; and 3,11) were measured by a magnetic bottle, electron energy analyzer. Calculations on these four stoichiometries provided geometric structures and full charge analyses for the cluster anions and their neutral cluster counterparts, as well as photodetachment transition energies (stick spectra). Calculations revealed that, unlike the cases of recently reported sodium-aluminum clusters, the formation of aluminum Zintl anion moieties within magnesium-aluminum clusters was limited in most cases by weak charge transfer between the magnesium atoms and their aluminum cluster moieties. Only in cases of high magnesium content, e.g., in Mg{sub 3}Al{sub 11} and Mg{sub 2}Al{sub 12}{sup ?}, did the aluminum moieties exhibit Zintl anion-like characteristics.

Wang, Haopeng; Jae Ko, Yeon; Zhang, Xinxing; Gantefoer, Gerd; Bowen, Kit H., E-mail: kiran@mcneese.edu, E-mail: akandalam@wcupa.edu, E-mail: kbowen@jhu.edu [Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218 (United States); Schnoeckel, Hansgeorg [Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, 76128 Karlsruhe (Germany)] [Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, 76128 Karlsruhe (Germany); Eichhorn, Bryan W. [Department of Chemistry, University of Maryland, College Park, Maryland 20742 (United States)] [Department of Chemistry, University of Maryland, College Park, Maryland 20742 (United States); Jena, Puru [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284 (United States)] [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284 (United States); Kiran, Boggavarapu, E-mail: kiran@mcneese.edu, E-mail: akandalam@wcupa.edu, E-mail: kbowen@jhu.edu [Department of Chemistry, McNeese State University, Lake Charles, Louisiana 70609 (United States)] [Department of Chemistry, McNeese State University, Lake Charles, Louisiana 70609 (United States); Kandalam, Anil K., E-mail: kiran@mcneese.edu, E-mail: akandalam@wcupa.edu, E-mail: kbowen@jhu.edu [Department of Physics, West Chester University, West Chester, Pennsylvania 19383 (United States)

2014-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "limestone mo magnesium" from the National Library of EnergyBeta (NLEBeta).
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361

Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach  

SciTech Connect

This paper applies a multi-step inverse approach to predict the forming of AZ31 magnesium alloy sheets. An in-house finite element code named INAPH, which implements the inverse approach formulation by Guo et al. (Int. J. Numer. Methods Eng., 30, 1385-1401), has been used for the forming analysis. This inverse approach uses the deformation theory of plasticity and assumes that the deformation is independent of the loading history. Failure during forming is predicted by a stress-based criterion or a forming limit diagram-based criterion. The INAPH predictions have been compared with experimental results of Takuda et al (Journal of Materials Processing Technology, 89-90:135-140) and incremental analysis using ABAQUS. The multi-step inverse analysis has been shown to very quickly and fairly accurately predict stress, plastic strain, thickness distributions and failure locations on deeply drawn parts made of AZ31 magnesium alloy. The capability of INAPH to predict the formability of magnesium alloys has also been demonstrated at various temperatures. As magnesium alloys possess very limited formability at room temperature, and their formability becomes better at higher temperatures (> 100oC), the inverse analysis constitutes an efficient and valuable tool to predict forming of magnesium alloy parts as a function of temperature. In addition, other processing and design parameters such as the initial dimensions, final desired shape, blank holder forces, and friction can be quickly adjusted to assess the forming feasibility.

Nguyen, Ba Nghiep; Bapanapalli, Satish K.

2009-04-01T23:59:59.000Z

362

Improvement in corrosion resistance of micro arc oxidation coating formed on AZ91D magnesium alloy via applying a nano-crystalline solgel layer  

Science Journals Connector (OSTI)

Although magnesium is used in many industries, it is reactive and requires protection against aggressive environments. In this study, oxide coating was formed on AZ91D magnesium alloy using micro-arc oxidation (M...

M. Laleh; Farzad Kargar; A. Sabour Rouhaghdam

2011-08-01T23:59:59.000Z

363

Electron-Atom Superelastic Scattering in Magnesium at Millielectron Volt Energies T. Baynard, A. C. Reber, R. F. Niedziela,| S. A. Darveau, B. Prutzman,# and R. S. Berry*,  

E-Print Network (OSTI)

Electron-Atom Superelastic Scattering in Magnesium at Millielectron Volt Energies T. Baynard, A. C energy dependence of magnesium from threshold to 1400 eV10 with an energy resolution of 250 meV. Similar

Berry, R. Stephen

364

Lightning arrestor connector lead magnesium niobate qualification pellet test procedures.  

SciTech Connect

Enhanced knowledge preservation for DOE DP technical component activities has recently received much attention. As part of this recent knowledge preservation effort, improved documentation of the sample preparation and electrical testing procedures for lead magnesium niobate--lead titanate (PMN/PT) qualification pellets was completed. The qualification pellets are fabricated from the same parent powders used to produce PMN/PT lightning arrestor connector (LAC) granules at HWF&T. In our report, the procedures for fired pellet surface preparation, electrode deposition, electrical testing and data recording are described. The dielectric measurements described in our report are an information only test. Technical reasons for selecting the electrode material, electrode size and geometry are presented. The electrical testing is based on measuring the dielectric constant and dissipation factor of the pellet during cooling from 280 C to 220 C. The most important data are the temperature for which the peak dielectric constant occurs (Curie Point temperature) and the peak dielectric constant magnitude. We determined that the peak dielectric constant for our procedure would be that measured at 1 kHz at the Curie Point. Both the peak dielectric constant and the Curie point parameters provide semi-quantitative information concerning the chemical and microstructural homogeneity of the parent material used for the production of PMN/PT granules for LACs. Finally, we have proposed flag limits for the dielectric data for the pellets. Specifically, if the temperature of the peak dielectric constant falls outside the range of 250 C {+-} 30 C we propose that a flag limit be imposed that will initiate communication between production agency and design agency personnel. If the peak dielectric constant measured falls outside the range 25,000 {+-} 10,000 we also propose that a flag limit be imposed.

Tuohig, W. (Honeywell FM& T, Kansas City, MO); Mahoney, Patrick A.; Tuttle, Bruce Andrew; Wheeler, Jill Susanne

2009-02-01T23:59:59.000Z

365

Structural studies of magnesium nitride fluorides by powder neutron diffraction  

SciTech Connect

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.

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

366

Domestic production of medical isotope Mo-99 moves a step closer  

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

Domestic production of medical isotope Mo-99 Domestic production of medical isotope Mo-99 moves a step closer Irradiated uranium fuel has been recycled and reused for molybdenum-99...

367

In situ electron microscopy study of growth of WO3 and MoO3 nanowhiskers  

Science Journals Connector (OSTI)

WO3 and MoO3 nanowhiskers were grown from nanosize WO3 and MoO3 powders intensely irradiated with electrons in an electron microscope. Solid and hollow nanowhiskers of these materials were observed. A growth mech...

1 R. T. Malkhasyan; R. K. Karakhanyan; M. N. Nazaryan

2003-05-01T23:59:59.000Z

368

Policy Flash 2013-71 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS...  

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

71 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS CLAUSES FOR SECTION H Policy Flash 2013-71 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS CLAUSES FOR SECTION H Policy Flash - AL...

369

Policy Flash 2013-71 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS...  

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

1 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS CLAUSES FOR SECTION H Policy Flash 2013-71 AL 2013-11 NON M&O CONTRACTOR BUSINESS SYSTEMS CLAUSES FOR SECTION H Policy Flash - AL...

370

Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy...  

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

Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films Studied Using Atom Probe Tomography: Comparison Of Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films...

371

Materials Science and Engineering A 418 (2006) 341356 Microstructural effects of AZ31 magnesium alloy on its  

E-Print Network (OSTI)

Materials Science and Engineering A 418 (2006) 341­356 Microstructural effects of AZ31 magnesium Magnesium alloys exhibit the attractive combination of low densities (1.74 g/cm3 versus 2.7 g/cm3 for Al

Tong, Wei

372

Geochemical Aspects of the Carbonation of Magnesium Silicates in an Aqueous Medium  

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

GEOCHEMICAL ASPECTS OF THE CARBONATION OF MAGNESIUM GEOCHEMICAL ASPECTS OF THE CARBONATION OF MAGNESIUM SILICATES IN AN AQUEOUS MEDIUM George D. Guthrie, Jr. (gguthrie@lanl.gov 505-665-6340) J. William Carey (bcarey@lanl.gov 505-667-5540) Deborah Bergfeld (debberrg@lanl.gov 505-667-1812) Darrin Byler (dbyler@lanl.gov 505-665-9562) Steve Chipera (chipera@lanl.gov 505-667-1110) Hans-Joachim Ziock (ziock@lanl.gov 505-667-7265) Hydrology, Geochemistry, & Geology Los Alamos National Laboratory Los Alamos, NM 87545 Klaus Lackner (ksl@lanl.gov 505-667-5694) Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM and Columbia University, New York, NY KEYWORDS: CO 2 sequestration, magnesium silicate, mineral carbonation INTRODUCTION The volume of carbon dioxide associated with the use of fossil fuels to produce

373

Coordination Chemistry in magnesium battery electrolytes: how ligands affect their performance  

SciTech Connect

Magnesium battery is potentially a safe, cost-effective, and high energy density technology for large scale energy storage. However, the development of magnesium battery has been hindered by the limited performance and the lack of fundamental understandings of electrolytes. Here, we present a coordination chemistry study of Mg(BH4)2 in ethereal solvents. The O donor denticity, i.e. ligand strength of the ethereal solvents which act as ligands to form solvated Mg complexes, plays a significant role in enhancing coulombic efficiency of the corresponding solvated Mg complex electrolytes. A new and safer electrolyte is developed based on Mg(BH4)2, diglyme and optimized LiBH4 additive. The new electrolyte demonstrates 100% coulombic efficiency, no dendrite formation, and stable cycling performance with the cathode capacity retention of ~90% for 300 cycles in a prototype magnesium battery.

Shao, Yuyan; Liu, Tianbiao L.; Li, Guosheng; Gu, Meng; Nie, Zimin; Engelhard, Mark H.; Xiao, Jie; Lu, Dongping; Wang, Chong M.; Zhang, Jiguang; Liu, Jun

2013-11-04T23:59:59.000Z

374

Direct atomic-scale observation of layer-by-layer oxide growth during magnesium oxidation  

SciTech Connect

The atomic-scale oxide growth dynamics are directly revealed by in situ high resolution transmission electron microscopy during the oxidation of Mg surface. The oxidation process is characterized by the layer-by-layer growth of magnesium oxide (MgO) nanocrystal via the adatom process. Consistently, the nucleated MgO crystals exhibit faceted surface morphology as enclosed by (200) lattice planes. It is believed that the relatively lower surface energies of (200) lattice planes should play important roles, governing the growth mechanism. These results facilitate the understanding of the nanoscale oxide growth mechanism that will have an important impact on the development of magnesium or magnesium alloys with improved resistance to oxidation.

Zheng, He; Wu, Shujing; Sheng, Huaping; Liu, Chun; Liu, Yu; Cao, Fan; Zhou, Zhichao; Zhao, Dongshan, E-mail: wang@whu.edu.cn, E-mail: dszhao@whu.edu.cn; Wang, Jianbo, E-mail: wang@whu.edu.cn, E-mail: dszhao@whu.edu.cn [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072 (China); Zhao, Xingzhong [School of Physics and Technology, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072 (China)

2014-04-07T23:59:59.000Z

375

Cohesion enhancing effect of magnesium in aluminum grain boundary: A first-principles determination  

SciTech Connect

The effect of magnesium on grain boundary cohesion in aluminum was investigated by means of first-principles calculations using the Rice-Wang model [Rice and Wang, Mater. Sci. Eng. A 107, 23 (1989)]. It is demonstrated that magnesium is a cohesion enhancer with a potency of -0.11 eV/atom. It is further determined through electronic structure and bonding character analysis that the cohesion enhancing property of magnesium is due to a charge transfer mechanism which is unusually strong and overcomes the negative result of the size effect mechanism. Consistent with experimental results, this work clarifies the controversy and establishes that Mg segregation does not contribute to stress corrosion cracking in Al alloys.

Zhang Shengjun; Freeman, Arthur J. [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States); Kontsevoi, Oleg Y. [Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States); Olson, Gregory B. [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States)

2012-06-04T23:59:59.000Z

376

Influence of Si Co-doping on electrical transport properties of magnesium-doped boron nanoswords  

SciTech Connect

Magnesium-doped boron nanoswords were synthesized via a thermoreduction method. The as-prepared nanoswords are single crystalline and {beta}-rhombohedral ({beta}-rh) phase. Electrical transport measurements show that variable range hopping conductivity increases with temperature, and carrier mobility has a greater influence than carrier concentration. These results are consistent with the three dimensional Mott's model (M. Cutler and N. F. Mott, Phys. Rev. 181, 1336 (1969)) besides a high density of localized states at the Fermi level compared with bulk {beta}-rh boron. Conductivity of Mg-doped boron nanoswords is significantly lower than that of ''pure'' (free of magnesium) boron nanoswords. Electron energy loss spectroscopy studies confirm that the poorer conductivity arises from silicon against magnesium doping.

Tian Yuan; Lu Hongliang; Tian Jifa; Li Chen; Hui Chao; Shi Xuezhao; Huang Yuan; Shen Chengmin; Gao Hongjun [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2012-03-05T23:59:59.000Z

377

¿Cómo funcionan los Híbridos?  

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

¿Cómo funcionan los Híbridos? ¿Cómo funcionan los Híbridos? Diagrama de los componentes de un híbrido completo, incluyen (1) un motor de combustión interna (2) un motor eléctrico, (3) un generador, (4) una aparato de cambio de motor, and (5) una batería de gran capacidad. en inglés Flash Animation: ¿Cómo funcionan los Híbridos? (Requiere versión Flash 6.0 o superior) HTML Version: ¿Cómo funcionan los Híbridos? Los vehículos Híbridos-eléctricos (VHEs) combinan las ventajas de los motores de gasolina con los motores eléctricos y se pueden configurar para diferentes objetivos, como mejorar el ahorro de combustible, aumentar su fuerza, o proveer fuerza adicional para el uso del sistema eléctrico o los componentes electrónicos. Algunas de las tecnologías avanzadas que usan los híbridos típicamente

378

Hole Selective MoOx Contact for Silicon Solar Cells  

Science Journals Connector (OSTI)

Hole Selective MoOx Contact for Silicon Solar Cells ... This work has important implications toward enabling a novel class of junctionless devices with applications for solar cells, light-emitting diodes, photodetectors, and transistors. ... Junctionless solar cells; silicon photovoltaics; heterojunctions; dopant-free contact; molybdenum trioxide ...

Corsin Battaglia; Xingtian Yin; Maxwell Zheng; Ian D. Sharp; Teresa Chen; Stephen McDonnell; Angelica Azcatl; Carlo Carraro; Biwu Ma; Roya Maboudian; Robert. M. Wallace; Ali Javey

2014-01-07T23:59:59.000Z

379

Exploring Neutron-Rich Oxygen Isotopes with MoNA  

E-Print Network (OSTI)

The Modular Neutron Array (MoNA) was used in conjunction with a large-gap dipole magnet (Sweeper) to measure neutron-unbound states in oxygen isotopes close to the neutron dripline. While no excited states were observed in 24O, a resonance at 45(2) keV above the neutron separation energy was observed in 23O.

N. Frank; T. Baumann; D. Bazin; J. Brown; P. A. DeYoung; J. E. Finck; A. Gade; J. Hinnefeld; R. Howes; J. -L. Lecouey; B. Luther; W. A. Peters; H. Scheit; A. Schiller; M. Thoennessen

2007-08-20T23:59:59.000Z

380

Phase transitions in the adsorption system Li/Mo(112)  

E-Print Network (OSTI)

Experimental studies of the phase transitions in the adsorption system Li/Mo(112) are presented. This system is a model system for highly anisotropic interactions. From measurements of the half-widths of the low-energy electron diffraction spot...

Fedorus, A.; Kolthoff, D.; Koval, V.; Lyuksyutov, Igor F.; Naumovets, AG; Pfnur, H.

2000-01-01T23:59:59.000Z

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


381

(Robert P. Biuk-Aghai), , , : robertb@umac.mo  

E-Print Network (OSTI)

1 * (Robert P. Biuk-Aghai), , , : robertb@umac.mo (GIS) TM 30 1111 (PC) (PDAs) (ITU) 2002 [1] (PDAs) (GIS) (GIS)- 2 34 5 * . #12;2 2222 2001 2002 (PDA) PalmOS Pocket Google Maps API 3333 GPS 3.13.13.13.1 1. 2. 3. . #12;3 Dijkstra [4] / 1 ("S", "D

Biuk-Aghai, Robert P.

382

JOURNAL DE PHYSIQUE Colloque C1, suppliment au no 4, Tome 38, Avril 1977, page C1-207 KINETICS OF THE CATION REDISTRIBUTION IN MAGNESIUM FERRITES  

E-Print Network (OSTI)

OF THE CATION REDISTRIBUTION IN MAGNESIUM FERRITES V. A. M. BRABERS and J. KLERK Department of Physics distribution des ions Mg2+et Fe3+sur les sites tetrakdriques et octakdriquesde ferrites de magnesium est Ctudi properties of ferrites. The cation distribution in magnesium ferrite has been studied by various authors

Boyer, Edmond

383

THE JOURNAL OF CHEMICAL PHYSICS VOLUME 45, NUMBER 6 15 SEPTEMBER 1966 Correlation Effects in Complex Spectra. I. Term Energies for the Magnesium  

E-Print Network (OSTI)

in Complex Spectra. I. Term Energies for the Magnesium Isoelectronic Sequence* RICHARD N. ZAREt Department of the low-lying excited configurations of the magnesium isoelectronic sequence which are noted along the magnesium isoelectronic sequence, an examination is made of the significance that can

Zare, Richard N.

384

MAGNESIUM OXIDE AN ENGINEERED BARRIER 2009 EPA WIPP RECERTIFICATION FACT SHEET United States Environmental Protection Agency | Office of Air and Radiation (6608J) | June 2009  

E-Print Network (OSTI)

MAGNESIUM OXIDE ­ AN ENGINEERED BARRIER 2009 EPA WIPP RECERTIFICATION FACT SHEET United States://www.epa.gov/radiation/wipp/index.html MAGNESIUM OXIDE ­ AN ENGINEERED BARRIER Why is MgO Used At WIPP? The U.S. Department of Energy (DOE) proposed the use of magnesium oxide (MgO) as an engineered barrier in the Compliance Certification

385

Characterization of a new magnesium hydrogen orthophosphate salt, Mg3.5H2(PO4)3, synthesized in supercritical water  

E-Print Network (OSTI)

Characterization of a new magnesium hydrogen orthophosphate salt, Mg3.5H2(PO4)3, synthesized 2007 Available online 31 March 2007 Abstract Beige crystals of a new magnesium hydrogen orthophosphate water; IR and Raman spectra; Magnesium; Orthophosphate; Nanomaterial 1. Introduction Inorganic

Ryan, Dominic

386

Nanotribology and Nanofabrication of MoO3 Structures by Atomic Force Microscopy  

Science Journals Connector (OSTI)

...MoS2) surfaces. Highly anisotropic friction was observed whereby...and Ni) typical of black shale environments. One of...MoS2) surfaces. Highly anisotropic friction was observed...measUred friction is extremely anisotropic, with MoO, crystals sliding...

Paul E. Sheehan; Charles M. Lieber

1996-05-24T23:59:59.000Z

387

Insertion of a magnesium(II)-octacarboranyl(hexylsulfanyl) porphyrazine into liposomes: a physico-chemical study  

E-Print Network (OSTI)

The synthesis, characterization and liposome insertion of a novel magnesium(II) carboranyl-porphyrazine, i.e. [2,3,7,8,12,13,17,18-octakis- (1,2-dicarba-closo-dodecaboranyl)-hexylthio-5,10,15,20- porphyrazine]magnesium(II) complex, MgHECSPz, is described. MgHECSPz was designed to improve the potentiality in multiple approach anticancer therapy. Liposomal formulations with different surface charge were prepared as delivering agents. The obtained loaded vectors were characterized by DLS, SAXS, SANS and \\zeta potential measurements in order to define the overall properties and structural details of loaded liposomes.

Anna Salvati; Sandra Ristori; Daniela Pietrangeli; Julian Oberdisse; Luca Calamai; Giacomo Martini; Giampaolo Ricciardi

2007-09-07T23:59:59.000Z

388

Physical Property of Magnesium Doped Barium Hexaferrite Particles By Citrate Precursor Route In Presence Of Surfactants  

SciTech Connect

M-type Barium Magnesium hexaferrite with the composition BaMg{sub 2}Fe{sub 10}O{sub 19} was successfully prepared with and without surfactant by using a citrate precursor route. The obtained precursors were calcined at various temperatures. The crystalline structure, phase analysis and particle size were investigated by using X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) techniques. It is observed that the surfactant addition controls the microstructure of the formed Barium Magnesium hexaferrite particles and the type of surfactant plays a crucial role in deciding the morphology of particles.

Paladiya, Snehal; Chauhan, C. C.; Jotania, R. B. [Indus Institute of Technology and Engineering, Rancharda via Thaltej, Ahmedabad-382 115. Gujarat (India)

2010-12-01T23:59:59.000Z

389

A re-assessment of age dating of fossiliferous limestones in eastern Sabah, Borneo: Implications for understanding the origins of the Indo-Pacific marine biodiversity hotspot  

Science Journals Connector (OSTI)

On the basis of a combined larger benthic foraminifera, nannofossil and strontium isotope dating programme we confidently re-assign muddy carbonate deposits from the Lower Kinabatangan River Area of Borneo to the Oligocene rather than the Early Miocene. High-diversity, coral-rich (>50 species) deposits are here tightly constrained to predominately at, or just after, the Early to Late Oligocene boundary (Larger benthic foraminifera zone Te1, Nannofossil zone NP24, Sr isotope ages 28.827.6Ma). This new dating potentially pushes back the start of the Indo-West Pacific Centre of Marine Diversity, at least for corals, about 5million years earlier than previous data indicated. Our new data supports maintaining separation of the muddy carbonates (previously defined as the Lower Kinabatangan Limestones: Haile & Wong, 1965) from nearby crystalline limestones of the Gomantong Limestone Formation dated here as Early Miocene (Larger benthic foraminifera zone Te5/earliest Tf1, Sr isotope age 21.0Ma). This apparently punctuated development of shallow marine carbonates is seen at several locations in northern Borneo; an area underlain by oceanic crust and long dominated by very deep marine sedimentation (Hutchison, 2005). The opportunistic formation of clastic-influenced coastal and isolated biohermal carbonates is both an important palaeontological data point and a geological marker of changing basin settings. The new data on the first shallow marine deposits in a long established deep marine location, and evidence for unconformities, has important implications for the regional tectonic model, in an area of hydrocarbon exploration.

Laura B. McMonagle; Peter Lunt; Moyra E.J. Wilson; Kenneth G. Johnson; Christina Manning; Jeremy Young

2011-01-01T23:59:59.000Z

390

Influence of Mo on the Fe:Mo:C nanocatalyst thermodynamics for single-walled carbon nanotube growth  

E-Print Network (OSTI)

ternary phases, such as the Fe,Mo 23C6 type carbides.37 The way in which carbon interacts with transition of metal carbide formation. Although relating C solubility and catalytic ability of metal catalysts,23 , metals which form carbides ca

Curtarolo, Stefano

391

Phonon and elastic instabilities in MoC and MoN Gus L. W. Hart* and Barry M. Klein  

E-Print Network (OSTI)

illustrating the rich behavior of carbo-nitride materials. The early transition metal carbides and nitrides high transition temperatures. We show that the elastic instability in B1-structure MoN, demonstrated the calculations re- ported here were performed with the linear-augmented- plane-wave method.2­4 The B1 carbides

Hart, Gus

392

Paleotopography and Sea-level Controls on Facies Distribution and Stratal Architecture in the Westerville Limestone Member (Upper Pennsylvanian) NE Kansas and NW Missouri  

E-Print Network (OSTI)

Packstone Facies 35 Microbial Boundstone Facies 40 Coarse-Grained Packstone Facies 44 STRATIGRAPHIC CORRELATIONS AND SEQUENCE-STRATIGRAPHIC INTERPRETATIONS 45 Stratigraphic Datum (Surface A) 58 Wea Shale 58 Surface B 63 Westerville Limestone Member 63... Interval W1 63 Surface C 70 Interval W2 73 Surface D 79 Interval W3 83 Surface E 93 Nellie Bly Formation and Quivira Shale Member 93 Relative Sea-Level Curve 94 DISCUSSION 102 Relative Sea-Level Curve 102 v Paleotopography, Relative Sea Level, and Carbonate...

Fairchild, Justin M.

2012-05-31T23:59:59.000Z

393

Scintillating bolometers based on ZnMoO$_4$ and Zn$^{100}$MoO$_4$ crystals to search for 0$\  

E-Print Network (OSTI)

The technology of scintillating bolometers based on zinc molybdate (ZnMoO$_4$) crystals is under development within the LUMINEU project to search for 0$\

Poda, D V; Arnaud, Q; Augier, C; Benot, A; Berg, L; Boiko, R S; Bergmann, T; Blmer, J; Broniatowski, A; Brudanin, V; Camus, P; Cazes, A; Censier, B; Chapellier, M; Charlieux, F; Chernyak, D M; Coron, N; Coulter, P; Cox, G A; Danevich, F A; de Boissire, T; Decourt, R; De Jesus, M; Devoyon, L; Drillien, A -A; Dumoulin, L; Eitel, K; Enss, C; Filosofov, D; Fleischmann, A; Fourches, N; Gascon, J; Gastaldo, L; Gerbier, G; Giuliani, A; Gros, M; Hehn, L; Henry, S; Herv, S; Heuermann, G; Humbert, V; Ivanov, I M; Juillard, A; Kflian, C; Kleifges, M; Kluck, H; Kobychev, V V; Koskas, F; Kozlov, V; Kraus, H; Kudryavtsev, V A; Sueur, H Le; Loidl, M; Magnier, P; Makarov, E P; Mancuso, M; de Marcillac, P; Marnieros, S; Marrache-Kikuchi, C; Menshikov, A; Nasonov, S G; Navick, X-F; Nones, C; Olivieri, E; Pari, P; Paul, B; Penichot, Y; Pessina, G; Piro, M C; Plantevin, O; Redon, T; Robinson, M; Rodrigues, M; Rozov, S; Sanglard, V; Schmidt, B; Shlegel, V N; Siebenborn, B; Strazzer, O; Tcherniakhovski, D; Tenconi, M; Torres, L; Tretyak, V I; Vagneron, L; Vasiliev, Ya V; Velazquez, M; Viraphong, O; Walker, R J; Weber, M; Yakushev, E; Zhang, X; Zhdankov, V N

2015-01-01T23:59:59.000Z

394

On the Reaction Mechanism of Acetaldehyde Decomposition on Mo(110)  

SciTech Connect

The strong Mo-O bond strength provides promising reactivity of Mo-based catalysts for the deoxygenation of biomass-derived oxygenates. Combining the novel dimer saddle point searching method with periodic spin-polarized density functional theory calculations, we investigated the reaction pathways of a acetaldehyde decomposition on the clean Mo(110) surface. Two reaction pathways were identified, a selective deoxygenation and a nonselective fragmentation pathways. We found that acetaldehyde preferentially adsorbs at the pseudo 3-fold hollow site in the ?2(C,O) configuration on Mo(110). Among four possible bond (?-C-H, ?-C-H, C-O and C-C) cleavages, the initial decomposition of the adsorbed acetaldehyde produces either ethylidene via the C-O bond scission or acetyl via the ?-C-H bond scission while the C-C and the ?-C-H bond cleavages of acetaldehyde leading to the formation of methyl (and formyl) and formylmethyl are unlikely. Further dehydrogenations of ethylidene into either ethylidyne or vinyl are competing and very facile with low activation barriers of 0.24 and 0.31 eV, respectively. Concurrently, the formed acetyl would deoxygenate into ethylidyne via the C-O cleavage rather than breaking the C-C or the C-H bonds. The selective deoxygenation of acetaldehyde forming ethylene is inhibited by relatively weaker hydrogenation capability of the Mo(110) surface. Instead, the nonselective pathway via vinyl and vinylidene dehydrogenations to ethynyl as the final hydrocarbon fragment is kinetically favorable. On the other hand, the strong interaction between ethylene and the Mo(110) surface also leads to ethylene decomposition instead of desorption into the gas phase. This work was financially supported by the National Advanced Biofuels Consortium (NABC). Computing time was granted by a user project (emsl42292) at the Molecular Science Computing Facility in the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL). This work was financially supported by the National Advanced Biofuels Consortium (NABC). Computing time was granted by a user project (emsl42292) at the Molecular Science Computing Facility in the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL). The EMSL is a U.S. Department of Energy (DOE) national scientific user facility located at Pacific Northwest National Laboratory (PNNL) and supported by the DOE Office of Biological and Environmental Research. Pacific Northwest National Laboratory is operated by Battelle for the U.S. Department of Energy.

Mei, Donghai; Karim, Ayman M.; Wang, Yong

2012-02-16T23:59:59.000Z

395

Processing of Mo-Si-B intermetallics by extrusion and oxidation properties of the extruded Tl-MoSi{sub 2}-MoB System  

SciTech Connect

An extrusion process was developed that is able to consistently produce large quantities of Mo-Si-B rods without the presence of defects. Binder removal from the extruded rods was studied in detail and it was determined that heating rates on the order of 0.02{degree}/minute (1.2{degree}/hour) are necessary to remove the binder without the formation of defects. This low heating rate resulted in debinding times in excess of 70 hours (approximately 3 days). Wicking was investigated as a means to decrease the time necessary for binder removal. Using 0.05{micro}m alumina powder as a wicking agent, binder removal times were reduced to 10 hours with heating rates up to 1{degree}/minute employed without defect formation. Once the extrusion process was complete the oxidation properties of the Tl-MoSi{sub 2}-MoB extruded phase assemblage was investigated. It was determined that this composition exhibits catastrophic oxidation or pesting in the temperature range of 660--760 C, resulting in the material turning to dust. Outside of this temperature range the composition is oxidatively stable. Continuous mass measurements were taken at 1,300, 1,450, and 1,600 C to determine the oxidation rate constants of this material. Parabolic rate constants of 6.9 x 10{sup {minus}3}, 1.3 x 10{sup {minus}3}, and 9.1 x 10{sup {minus}3} mg{sup 2}/cm{sup 4}/hr were determined for 1,300, 1,450, and 1,600 C respectively.

Summers, Eric

1999-11-08T23:59:59.000Z

396

Zinc and Magnesium in Human Prostate Gland: Normal, Hyperplastic, and Neoplastic  

Science Journals Connector (OSTI)

...hyperplastic gland. In addition, there was a marked...through a mixed-bed ion-exchange resin. All zinc and magnesium...plastic gland. In addition, there was a marked...S. Histochemi cal Demonstration of Zinc in the Dorsolateral...

Ferenc Gyrkey; Kyung-Whan Min; James A. Huff; and Phyllis Gyrkey

1967-08-01T23:59:59.000Z

397

American Institute of Aeronautics and Astronautics Performance Comparison between a Magnesium-and  

E-Print Network (OSTI)

that high-throughput vacuum pumps are not required for ground testing since these species will condense of 2700 s at 300 V. The anode efficiency was found to be ~23% using magnesium which is substantially lower than the 40% anode efficiency of xenon at approximately equivalent molar flow rates. A comparison

King, Lyon B.

398

Solid-State Gadolinium-Magnesium Hydride Optical Switch R. Armitage  

E-Print Network (OSTI)

-state electrochromic device. With positive polarization of the hydride electrode, the visible reflectance approaches 35 and reflecting states. Keywords: gadolinium-magnesium; electrochromic hydride; optical switching device. 2 #12;A conventional electrochromics5 . Optical switching has also been demonstrated by varying the H content

399

Octupole collectivity in {sup 98,100,102}Mo  

SciTech Connect

Excited states in {sup 98,100,102}Mo have been studied via the {sup 30}Si+{sup 168}Er-induced fission reaction at a beam energy of 142 MeV. Prompt {gamma} rays were detected with the EUROBALL III multidetector array. The level schemes are extended with more than 20 new transitions and interpreted in the framework of a soft-octupole vibration model.

Lalkovski, S.; Ilieva, S.; Minkova, A.; Minkov, N.; Kutsarova, T.; Lopez-Martens, A.; Korichi, A.; Huebel, H.; Goergen, A.; Jansen, A.; Schoenwasser, G.; Herskind, B.; Bergstroem, M.; Podolyak, Zs. [Department of Physics, University of Sofia, 1164 Sofia (Bulgaria); Institute for Nuclear Research and Nuclear Energy, BAS, 1784 Sofia (Bulgaria); Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, F-91405 Orsay Campus (France); Helmholtz-Institut fuer Strahlen-und Kernphysik, Universitaet Bonn, Nussallee 14-16, D-53115 Bonn (Germany); The Niels Bohr Institut, Blegdamsvej 17, DK-2100 Copenhagen (Denmark); INFN, Laboratori Nationali di Legnaro (Italy)

2007-01-15T23:59:59.000Z

400

IRRADIATION PERFORMANCE OF U-Mo MONOLITHIC FUEL  

SciTech Connect

High-performance research reactors require fuel that operates at high specific power to high fission density, but at relatively low temperatures. Research reactor fuels are designed for efficient heat rejection, and are composed of assemblies of thin-plates clad in aluminum alloy. The development of low-enriched fuels to replace high-enriched fuels for these reactors requires a substantially increased uranium density in the fuel to offset the decrease in enrichment. Very few fuel phases have been identified that have the required combination of very-high uranium density and stable fuel behavior at high burnup. UMo alloys represent the best known tradeoff in these properties. Testing of aluminum matrix U-Mo aluminum matrix dispersion fuel revealed a pattern of breakaway swelling behavior at intermediate burnup, related to the formation of a molybdenum stabilized high aluminum intermetallic phase that forms during irradiation. In the case of monolithic fuel, this issue was addressed by eliminating, as much as possible, the interfacial area between U-Mo and aluminum. Based on scoping irradiation test data, a fuel plate system composed of solid U-10Mo fuel meat, a zirconium diffusion barrier, and Al6061 cladding was selected for development. Developmental testing of this fuel system indicates that it meets core criteria for fuel qualification, including stable and predictable swelling behavior, mechanical integrity to high burnup, and geometric stability. In addition, the fuel exhibits robust behavior during power-cooling mismatch events under irradiation at high power.

M.K. Meyer; J. Gan; J.-F. Jue; D.D. Keiser; E. Perez; A. Robinson; D.M. Wachs; N. Woolstenhulme; G.L. Hofman; Y.-S. Kim

2014-04-01T23:59:59.000Z

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


401

Oxidation of ethane to ethylene and acetic acid by MoVNbO catalysts M. Roussel1  

E-Print Network (OSTI)

1 Oxidation of ethane to ethylene and acetic acid by MoVNbO catalysts M. Roussel1 , M. Bouchard1 catalytic properties in the oxidation of ethane to ethylene and acetic acid is examined. Solids based on Mo and nanosize of MoO3 and (VNbMo)5O14 crystals. The high global selectivity to ethylene and acetic acid (90

Paris-Sud XI, Université de

402

1 Di Neujahr 1 Fr 1 Fr 1 Mo Ostermontag 2 Mi 2 Sa 2 Sa 2 Di  

E-Print Network (OSTI)

1 Di Neujahr 1 Fr 1 Fr 1 Mo Ostermontag 2 Mi 2 Sa 2 Sa 2 Di 3 Do 3 So 3 So 3 Mi 4 Fr 4 Mo 4 Mo 4 Do 5 Sa 5 Di 5 Di 5 Fr 6 So 6 Mi 6 Mi 6 Sa 7 Mo 7 Do 7 Do 7 So 8 Di 8 Fr 8 Fr 8 Mo 9 Mi 9 Sa 9 Sa 9 Di 10 Do 10 So 10 So 10 Mi 11 Fr 11 Mo 11 Mo 11 Do 12 Sa 12 Di 12 Di 12 Fr 13 So 13 Mi 13 Mi Power

Grübel, Rudolf

403

Electrodeposition of CIS films on the Mo back electrodes with different crystallinities  

Science Journals Connector (OSTI)

Electrodeposition of copper indium diselenide (CuInSe2), which is an absorption layer for thin film solar cells, has been studied on a molybdenum (Mo)-coated glass with different crystallinities. Metastable FCC Mo and BCC Mo coatings were prepared by R.F. sputtering with varying R.F. power (100170W) and Ar pressure (311mTorr). Experimental results indicated that the Mo coating deposited at lower power and higher pressure had smaller crystallite size. Cross-sectional transmission electron microscopy showed that the Mo coating deficient in crystallinities contained micro voids residing in the boundaries of the columnar grains and had higher oxygen content, as measured by energy dispersive spectroscopy. The crystallinity of Mo coatings strongly influenced the open circuit potential in the electrolyte for CIS electrodeposition. Consequently, the Cu/In ratio of CIS deposits plated at a constant potential (?0.7 vs. SCE) varied with the distinct Mo coatings. Moreover, the CIS deposit on the various Mo-coated glasses displayed a different morphology. The effect of the crystallinity of Mo coatings on hydrogen evolution reaction at pH 1.55 was also explored. Hydrogen evolution during the CIS electrodeposition may be one of the key factors to influence the CIS morphology. How the crystallinity of the Mo coating affects the composition and morphology of the CIS deposits can be useful for device fabrication and deserves for further study.

Hsien-Chung Huang; Chao-Sung Lin; Wei-Che Chang

2012-01-01T23:59:59.000Z

404

Influence of Electrolyte Chemistry on Morphology and Corrosion Resistance of Micro Arc Oxidation Coatings Deposited on Magnesium  

Science Journals Connector (OSTI)

In the present work, micro arc oxidation (MAO) coatings were synthesized on magnesium...2SiO3), potassium hydroxide (KOH), and sodium aluminate (NaAlO2). The resultant coatings were subjected to coating thickness...

L. Rama Krishna; G. Poshal; G. Sundararajan

2010-12-01T23:59:59.000Z

405

Local arc discharge mechanism and requirements of power supply in micro-arc oxidation of magnesium alloy  

Science Journals Connector (OSTI)

To study the requirements of the power supply in micro-arc oxidation (MAO) of magnesium alloy, many experiments ... . Based on the experimental results and electric arc theory, the separate local arc discharge me...

Ming Chen; Yuezhou Ma; Yuan Hao

2010-03-01T23:59:59.000Z

406

Vehicle Technologies Office Merit Review 2014: Scale-Up of Magnesium Production by Fully Stabilized Zirconia Electrolysis  

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

Presentation given by INFINIUM, Inc. at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about scale-up of magnesium...

407

Role of cultivars to susceptibility to Magnesium deficiency a new disorder in Tomato in alfisols of India  

E-Print Network (OSTI)

1. Magnesium deficiency in F1 hybrids on open pollinatedEarly (Early) harvest F1 hybrid (late harvest) harvest)local cultivars with the F1 hybrids from Europe with semi

Muthaia, Edward Raja Dr

2009-01-01T23:59:59.000Z

408

Changes in the local environment surrounding magnesium ions in fragile MgO-SiO{sub 2} liquids.  

SciTech Connect

X-ray diffraction data have been collected in situ for a series of magnesium silicate liquids between and including the two mineral compositions enstatite and forsterite (MgSiO{sub 3} and Mg{sub 2}SiO{sub 4}). The pair distribution functions obtained from these data show that the local oxygen environment around the magnesium ions contrasts with that found in the equivalent glasses. We identify a transition window between 42 and 38 mole %SiO{sub 2} where the average magnesium coordination number changes on cooling from a Mg-O coordination number of {approx}5.1 {+-} 0.2 in the liquid state to a value of 4.5 {+-} 0.1 in the glass. This change in structure reflects a competition between a sparsely polymerized silicate network and a disordered magnesium framework in the liquid, while the silicate network dominates in the glass.

Wilding, M. C.; Benmore, C. J.; Weber, J. K. R.; X-Ray Science Division; Aberystwyth Univ.; Materials Development Inc.

2010-01-01T23:59:59.000Z

409

Study of second phase in bioabsorbable magnesium alloys: Phase stability evaluation via Dmol{sup 3} calculation  

SciTech Connect

Thermodynamical stabilities of four conventional second phases as well as magnesium matrix in bioabsorbable magnesium alloys were investigated theoretically via computer calculation method. Model of individual phase and systems including phase and four water molecular (phase-4H{sub 2}O) were established to simulate the in vitro and in vivo environment. Local orbital density functional theory approach was applied to calculate the total energy for the individual phase and phase-4H{sub 2}O system. The results demonstrated that all the second phases possessed higher phase stability compared with magnesium matrix, but the phase stability was quite different for different types of second phases or second phase-4H{sub 2}O systems. Furthermore, a schematic process of inflammation reaction caused by magnesium alloy implants was proposed for the further evaluation on biocompatibility of different second phases.

Yang, Huazhe [Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 (China); Department of Biophysics, China Medical University, Shenyang 110001 (China); Liu, Chen [Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 (China); Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094 (China); Wan, Peng; Tan, Lili; Yang, Ke, E-mail: kyang@imr.ac.cn [Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 (China)

2013-11-01T23:59:59.000Z

410

Synthesis and Structural Characterization of Magnesium Based Coordination Networks in Different Solvents  

SciTech Connect

Three magnesium based metal-organic frameworks, Mg{sub 3}(3,5-PDC){sub 3}(DMF){sub 3} {center_dot} DMF [1], Mg(3,5-PDC)(H{sub 2}O) {center_dot} (H{sub 2}O) [3], and Mg{sub 4}(3,5-PDC){sub 4}(DMF){sub 2}(H{sub 2}O){sub 2} {center_dot} 2DMF {center_dot} 4.5H{sub 2}O [4], and a 2-D coordination polymer, [Mg(3,5-PDC)(H{sub 2}O){sub 2}] [2] [PDC = pyridinedicarboxylate], were synthesized using a combination of DMF, methanol, ethanol, and water. Compound 1 [space group P2{sub 1}/n, a = 12.3475(5) {angstrom}, b = 11.1929(5) {angstrom}, c = 28.6734(12) {angstrom}, {beta} = 98.8160(10){sup o}, V = 3916.0(3) {angstrom}{sup 3}] consists of a combination of isolated and corner-sharing magnesium octahedra connected by the organic linkers to form a 3-D network with a 12.2 {angstrom} x 4.6 {angstrom} 1-D channel. The channel contains coordinated and free DMF molecules. In compound 2 [space group C2/c, a = 9.964(5) {angstrom}, b = 12.0694(6) {angstrom}, c = 7.2763(4) {angstrom}, {beta} = 106.4970(6){sup o}, V = 836.70(6) {angstrom}{sup 3}], PDC connects isolated seven coordinated magnesium polyhedra into a layered structure. Compound 3 [space group P6{sub 1}22, a = 11.479(1) {angstrom}, c = 14.735(3) {angstrom}, V = 1681.7(4) {angstrom}{sup 3}] (previously reported) contains isolated magnesium octahedra connected by the organic linker with each other forming a 3D network. Compound 4 [space group P2{sub 1}/c, a = 13.7442(14) {angstrom}, b = 14.2887(15) {angstrom}, c = 14.1178(14) {angstrom}, {beta} = 104.912(2){sup o}, V = 2679.2(5) {angstrom}{sup 3}] also exhibits a 3D network based on isolated magnesium octahedra with square cavities containing both disordered DMF and water molecules. The structural topologies originate due to the variable coordination ability of solvent molecules with the metal center. Water molecules coordinate with the magnesium metal centers preferably over other polar solvents (DMF, methanol, ethanol) used to synthesize the coordination networks. Despite testing multiple desolvation routes, we were unable to measure BET surface areas greater than 51.9 m{sup 2}/g for compound 1.

D Banerjee; J Finkelstein; A Smirnov; P Forster; L Borkowski; S Teat; J Parise

2011-12-31T23:59:59.000Z

411

Synthesis and Structural Characterization of Magnesium Based Coordination Networks in Different Solvents  

SciTech Connect

Three magnesium based metal-organic frameworks, Mg{sub 3}(3,5-PDC){sub 3}(DMF){sub 3} {center_dot} DMF [1], Mg(3,5-PDC)(H{sub 2}O) {center_dot} (H{sub 2}O) [3], and Mg4(3,5-PDC)4(DMF){sub 2}(H{sub 2}O){sub 2} {center_dot} 2DMF {center_dot} 4.5H{sub 2}O [4], and a 2-D coordination polymer, [Mg(3,5-PDC)(H{sub 2}O){sub 2}] [2] [PDC = pyridinedicarboxylate], were synthesized using a combination of DMF, methanol, ethanol, and water. Compound 1 [space group P2{sub 1}/n, a = 12.3475(5) {angstrom}, b = 11.1929(5) {angstrom}, c = 28.6734(12) {angstrom}, {beta} = 98.8160(10){sup o}, V = 3916.0(3) {angstrom}{sup 3}] consists of a combination of isolated and corner-sharing magnesium octahedra connected by the organic linkers to form a 3-D network with a 12.2 {angstrom} x 4.6 {angstrom} 1-D channel. The channel contains coordinated and free DMF molecules. In compound 2 [space group C2/c, a = 9.964(5) {angstrom}, b = 12.0694(6) {angstrom}, c = 7.2763(4) {angstrom}, {beta} = 106.4970(6){sup o}, V = 836.70(6) {angstrom}{sup 3}], PDC connects isolated seven coordinated magnesium polyhedra into a layered structure. Compound 3 [space group P6{sub 1}22, a = 11.479(1) {angstrom}, c = 14.735(3) {angstrom}, V = 1681.7(4) {angstrom}{sup 3}] (previously reported) contains isolated magnesium octahedra connected by the organic linker with each other forming a 3D network. Compound 4 [space group P2{sub 1}/c, a = 13.7442(14) {angstrom}, b = 14.2887(15) {angstrom}, c = 14.1178(14) {angstrom}, {beta} = 104.912(2){sup o}, V = 2679.2(5) {angstrom}{sup 3}] also exhibits a 3D network based on isolated magnesium octahedra with square cavities containing both disordered DMF and water molecules. The structural topologies originate due to the variable coordination ability of solvent molecules with the metal center. Water molecules coordinate with the magnesium metal centers preferably over other polar solvents (DMF, methanol, ethanol) used to synthesize the coordination networks. Despite testing multiple desolvation routes, we were unable to measure BET surface areas greater than 51.9 m{sup 2}/g for compound 1.

Banerjee, Debasis; Finkelstein, Jeffrey; Smirnov, A.; Forster, Paul M.; Borkowski, Lauren A.; Teat, Simon J.; Parise, John B. (UNLV); (SUNYB); (LBNL)

2012-10-11T23:59:59.000Z

412

The effect of sulfur, magnesium, and various rates of potassium on forage production in some sandy soils of East Texas  

E-Print Network (OSTI)

THE EFFECT OF SULFUR, MAGNESIUM, AND VARIOUS RATES OF POTASSIUM ON FORAGE PRODUCTION IN SOME SANDy SOILS OF EAST TEXAS A Thesis by DENNIS PAUL LANDUA Submitted to the Graduate Collccje of Texas AFM Unive, sity in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE Ma 1969 Major Subject Soil Chemistr THE EFFECT OF SULFUR, MAGNESIUM, AND VARIOUS RATES OF POTASSIUM ON FORAGE PRODUCTION IN SOME SANDY SOILS OF EAST TEXAS A Thesis by DENNIS PAUL LANDUA Approved...

Landua, Dennis Paul

2012-06-07T23:59:59.000Z

413

The determination of the bioavailability and the site of absorption in lambs fed different sources of magnesium  

E-Print Network (OSTI)

THE DETERMINATION OF THE BIOAVAILABILITY AND THE SITE OF ABSORPTION IN LAMBS FED DIFFERENT SOURCES OF MAGNESIUM A Thesis I, EIGH ANNE HURLEY Submitted to the Of f ice of Graduate Studies Texas AAM UniversitY in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1988 Major Subject: Animal Science THE DETERMINATION OF THE BIOAVAILABILITY AND THE SITE OF ABSORPTION IN LAMBS FED DIFFERENT SOURCES OF MAGNESIUM A Thesis by LEIGH ANNE HURLEY Approved...

Hurley, Leigh Anne

2012-06-07T23:59:59.000Z

414

Design and experimental activities supporting commercial U.S. electron accelerator production of Mo-99  

SciTech Connect

{sup 99m}Tc, the daughter isotope of {sup 99}Mo, is the most commonly used radioisotope for nuclear medicine in the United States. Under the direction of the National Nuclear Security Administration (NNSA), Los Alamos National Laboratory (LANL) and Argonne National Laboratory (ANL) are partnering with North Star Medical Technologies to demonstrate the viability of large-scale {sup 99}Mo production using electron accelerators. In this process, {sup 99}Mo is produced in an enriched {sup 100}Mo target through the {sup 100}Mo({gamma},n){sup 99}Mo reaction. Five experiments have been performed to date at ANL to demonstrate this process. This paper reviews the current status of these activities, specifically the design and performance of the helium gas target cooling system.

Dale, Gregory E.; Woloshun, Keith A.; Kelsey IV, Charles T.; Olivas, Eric R.; Holloway, Michael A.; Hurtle, Ken P.; Romero, Frank P.; Dalmas, Dale A. [Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545 (United States); Chemerisov, Sergey D.; Vandegrift, George F.; Tkac, Peter; Makarashvili, Vakho; Jonah, Charles D. [Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States); Harvey, James T. [NorthStar Medical Technologies, LLC, 5249 Femrite Drive, Madison, WI 53718 (United States)

2013-04-19T23:59:59.000Z

415

Fe3O4-LiMo3Se3 Nanoparticle Clusters as Superparamagnetic Nanocompasses  

E-Print Network (OSTI)

Fe3O4-LiMo3Se3 Nanoparticle Clusters as Superparamagnetic Nanocompasses Frank E. Osterloh,*, Hiroki bacteria is described. LiMo3Se3-Fe3O4 nanowire-nanoparticle composites were synthesized by a reaction of 3-iodopropionic acid treated LiMo3Se3 nanowire bundles with oleic acid-stabilized Fe3O4 nanoparticles of 2.8, 5

Osterloh, Frank

416

Honeywell Modular Automation System Computer Software Documentation for the Magnesium Hydroxide Precipitation Process  

SciTech Connect

The purpose of this Computer Software Document (CSWD) is to provide configuration control of the Honeywell Modular Automation System (MAS) in use at the Plutonium Finishing Plant (PFP) for the Magnesium Hydroxide Precipitation Process in Rm 23OC/234-52. This CSWD describes hardware and PFP/FFS developed software for control of Magnesium Hydroxide Precipitation process located in room 230, 234-52. The Honeywell and Plant Scape software generate limited configuration reports for the developed control software. These reports are described in the following section and are attached as addendum's. This plan applies to PFP Engineering Manager, Thermal Stabilization Cognizant Engineers, Solutions Stabilization Engineers, and the Shift Technical Advisors responsible for the Honeywell MAS software/hardware and administration of the Honeywell System.

STUBBS, A.M.

2001-02-01T23:59:59.000Z

417

Sol-gel preparation of lead magnesium niobate (PMN) powders and thin films  

DOE Patents (OSTI)

A method of preparing a lead magnesium niobium oxide (PMN), Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}, precursor solution by a solvent method wherein a liquid solution of a lead-complex PMN precursor is combined with a liquid solution of a niobium-complex PMN precursor, the combined lead- and niobium-complex liquid solutions are reacted with a magnesium-alkyl solution, forming a PMN precursor solution and a lead-based precipitate, and the precipitate is separated from the reacted liquid PMN precursor solution to form a precipitate-free PMN precursor solution. This precursor solution can be processed to form both ferroelectric powders and thin films. 3 figs.

Boyle, T.J.

1999-01-12T23:59:59.000Z

418

The effect of rare earth elements on the texture and formability of asymmetrically rolled magnesium sheet  

SciTech Connect

The lack of formability is a serious issue when considering magnesium alloys for various applications. Standard symmetric rolling introduces a strong basal texture that decreases the formability; however, asymmetric rolling has been put forward as a possible route to produce sheet with weaker texture and greater ductility. It has also been shown in recent work that weaker textures can be produced through the addition of rare earth elements to magnesium alloys. Therefore, this study has been carried out to investigate the effect of rare earth additions on the texture changes during asymmetric rolling. Two alloys have been used, AZ31B and ZEK100. The effect that the rare earth additions have on the texture of asymmetrically rolled sheet and the subsequent changes in formability will be discussed.

Alderman, Dr. Martyn [Magnesium Elektron North America; Cavin, Odis Burl [ORNL; Davis, Dr. Bruce [Magnesium Elektron North America; Muralidharan, Govindarajan [ORNL; Muth, Thomas R [ORNL; Peter, William H [ORNL; Randman, David [Magnesium Elektron North America; Watkins, Thomas R [ORNL

2011-01-01T23:59:59.000Z

419

Sol-Gel Preparation Of Lead Magnesium Ni Obate (Pmn) Powdersand Thin Films  

DOE Patents (OSTI)

A method of preparing a lead magnesium niobium oxide (PMN), Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, precursor solution by a solvent method wherein a liquid solution of a lead-complex PMN precursor is combined with a liquid solution of a niobium-complex PMN precursor, the combined lead- and niobium-complex liquid solutions are reacted with a magnesium-alkyl solution, forming a PMN precursor solution and a lead-based precipitate, and the precipitate is separated from the reacted liquid PMN precursor solution to form a precipitate-free PMN precursor solution. This precursor solution can be processed to form both ferroelectric powders and thin films.

Boyle, Timothy J. (Albuquerque, NM)

1999-01-12T23:59:59.000Z

420

Experimental activities supporting commercial U.S. accelerator production of 99-Mo  

SciTech Connect

{sup 99m}Tc, the daughter product of {sup 99}Mo, is the most commonly used radioisotope for nuclear medicine in the U.S. Experiments are being performed at Los Alamos National Laboratory and Argonne National Laboratory to demonstrate production of {sup 99}Mo using accelerators. The {sup 100}Mo({gamma},n){sup 99}Mo reaction in an enriched {sup 100}Mo target is currently under investigation. Three scaled low-power production experiments using a 20-MeV electron linac at Argonne have been performed to date. Two of these experiments used natural Mo targets and produced a total of 613 {mu}C of {sup 99}Mo. The third experiment used an enriched {sup 100}Mo target and produced 10.5 mCi of {sup 99}Mo. Following irradiation the targets were dissolved and the low specific activity solution was processed through an ARSII generator from NorthStar Medical Radioisotopes. Yields of {sup 99m}Tc >95% have been observed.

Dale, Gregory E [Los Alamos National Laboratory; Chemerisov, Sergey D [ANL; Vandegrift, George F [ANL

2010-01-01T23:59:59.000Z

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


421

Oxidation Behavior of Mo-Si-B Alloys in Wet Air  

SciTech Connect

Multiphase composite alloys based on the Mo-Si-B system are candidate materials for ultra-high temperature applications. In non load-bearing uses such as thermal barrier coatings or heat exchangers in fossil fuel burners, these materials may be ideally suited. The present work investigated the effect of water vapor on the oxidation behavior of Mo-Si-B phase assemblages. Three alloys were studied: Alloy 1 = Mo{sub 5}Si{sub 3}B{sub x} (T1)- MoSi{sub 2}- MoB, Alloy 2 = T1- Mo{sub 5}SiB{sub 2} (T2)- Mo{sub 3}Si, and Alloy 3 = Mo- T2- Mo{sub 3}Si. Tests were conducted at 1000 and 1100C in controlled atmospheres of dry air and wet air nominally containing 18, 55, and 150 Torr H{sub 2}O. The initial mass loss of each alloy was approximately independent of the test temperature and moisture content of the atmosphere. The magnitude of these initial losses varied according to the Mo content of the alloys. All alloys formed a continuous, external silica scale that protected against further mass change after volatilization of the initially formed MoO{sub 3}. All alloys experienced a small steady state mass change, but the calculated rates cannot be quantitatively compared due to statistical uncertainty in the individual mass measurements. Of particular interest is that Alloy 3, which contains a significant volume fraction of Mo metal, formed a protective scale. All alloys formed varying amounts of subscale Mo and MoO{sub 2}. This implies that oxygen transport through the external silica scale has been significantly reduced. For all alloys, water vapor accelerated the growth of a multiphase interlayer at the silica scale/unoxidized alloy interface. This interlayer is likely composed of fine Mo and MoO{sub 2} that is dispersed within a thin silica matrix. Alloy 3 was particularly sensitive to water accelerated growth of this interlayer. At 1100 C, the scale thickness after 300 hours increased from about 20 mm in dry air to nearly 100 mm in wet air.

M. Kramer; A. Thom; O. Degirmen; V. Behrani; M. Akinc

2002-04-22T23:59:59.000Z

422

Large scale two-dimensional arrays of magnesium diboride superconducting quantum interference devices  

SciTech Connect

Magnetic field sensors based on two-dimensional arrays of superconducting quantum interference devices were constructed from magnesium diboride thin films. Each array contained over 30?000 Josephson junctions fabricated by ion damage of 30?nm weak links through an implant mask defined by nano-lithography. Current-biased devices exhibited very large voltage modulation as a function of magnetic field, with amplitudes as high as 8?mV.

Cybart, Shane A., E-mail: scybart@ucsd.edu; Dynes, R. C. [Department of Physics, University of California San Diego, La Jolla, California 92093 (United States); Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Wong, T. J.; Cho, E. Y. [Department of Physics, University of California San Diego, La Jolla, California 92093 (United States); Beeman, J. W. [Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Yung, C. S.; Moeckly, B. H. [Superconductor Technologies Inc., Santa Barbara, California 93111 (United States)

2014-05-05T23:59:59.000Z

423

Original article Effect of calcium and magnesium ions on the intestinal  

E-Print Network (OSTI)

Original article Effect of calcium and magnesium ions on the intestinal absorption of oleic acid models : rat isolated jejunal loops at 30°C and 37°C and mouse jejunal explants at 37°C. At 30°C or at 37°C, Ca++ significantly increased 14C oleic acid uptake by rat isolated jejunal loops or mouse jejunal

Paris-Sud XI, Université de

424

The tolerance of two varieties of cotton to relatively high levels of sodium and magnesium  

E-Print Network (OSTI)

of MASTER OP SCIENCE August 1969 Major Subject Plant ~ph ~siolo THE TOLERANCE OF TvJO VARIETIES OF COTTON TO RELATIVELY HIGH LEVELS OF SODIUN AND NAGNESIUN A Thesis by Nanhar C. Parekh Approved as to style and content by: (Head of Department...) (Nember) (Nemb ) August 1969 ABSTRACT The Tolerance of Two Varieties of Cotton to Relatively High Levels of Sodium and Magnesium. (August 1969) Masher C. Parekh, B. S. , Gujarat University, Directed by: Dr. H. E. Joham An experiment was conducted...

Parekh, Manhar C

2012-06-07T23:59:59.000Z

425

Development of an inert ceramic anode to reduce energy consumption in magnesium production. Final Report  

SciTech Connect

The objective of this work is to develop a dimensionally stable ceramic anode for production of magnesium metal in electrolytic cells, replacing the graphite anodes currently used by The Dow Chemical Company magnesium business. The work is based on compositional and design technology for a ceramic anode developed in the former Central Research Inorganic Laboratory. The approach selected is to use a ceramic semiconductor tube as the material to interface with the bath and gaseous atmosphere in the cell. The testing goal was to demonstrate six anodes surviving a 30 day test lifetime with acceptable wear rates and electrical performance in a laboratory scale magnesium cell test. State of the art slip casting techniques were used and advanced in the pursuit of a virtually flaw free ceramic anode shell. Novel core materials were also invented to allow for the complete, crack free fabrication of the laboratory scale anode. Two successive anodes were tested and exceeded the 30 day cell lifetime goal with excellent wear characteristics. More aggressive testing of the ceramic anode revealed that the anode had a rather narrow operating region.

NONE

1997-06-01T23:59:59.000Z

426

CO{sub 2} laser beam welding of magnesium-based alloys  

SciTech Connect

Magnesium has gained increased attention in recent years as a structural metal--especially in the automotive industry--necessitating the development of welding techniques qualified for this new application. Lasers are known to be an excellent tool for joining metals. This paper presents results of recent investigations on the weldability of several cast and wrought magnesium-based alloys. Plates with a thickness of 2.5--8 mm were butt joint welded with and without filler metal using a 2.5-kW CO{sub 2} laser. The investigations showed that magnesium alloys can be easily laser welded in similar and dissimilar joints. The beam characteristics of the laser leads to small welds and a deep penetration depth. Crackfree welds exhibiting low porosity and good surface finish can be achieved with appropriate process parameters. Generally, the laser welding leads to either no change or a small increase in hardness in the fusion zone (FZ) and in the heat-affected zone (HAZ) relative to the base metal. Less promising results were obtained for the cast alloy QE22, in which cracking in the age-hardened condition and a significant decrease in hardness occurred. Laser welded die cast alloys showed an extremely high level of porosity in the weld.

Weisheit, A.; Galun, R.; Mordike, B.L. [Technische Univ. Clausthal, Clausthal-Zellerfeld (Germany). Inst. fuer Werkstoffkunde und Werkstofftechnik

1998-04-01T23:59:59.000Z

427

Yield Asymmetry Design of Magnesium Alloys by Integrated Computational Materials Engineering  

SciTech Connect

Deformation asymmetry of magnesium alloys is an important factor on machine design in automobile industry. Represented by the ratio of compressive yield stress (CYS) against tensile yield stress (TYS), deformation asymmetry is strongly related to microstructure, characterized by texture and grain size. Modified intermediate phi-model, a polycrystalline viscoplasticity model, is used to predict the deformation behavior of magnesium alloys with different grain sizes. Validated with experimental results, integrated computational materials engineering is applied to find out the route in achieving desired asymmetry by thermomechanical processing. In some texture, for example, rolled texture, CYS/TYS is smaller than 1 under different loading directions. In some texture, for example, extruded texture, asymmetry is large along normal direction. Starting from rolled texture, the asymmetry will increased to close to 1 along rolling direction after compressed to a strain of 0.2. Our model shows that grain refinement increases CYS/TYS. Besides texture control, grain refinement can also optimize the yield asymmetry. After the grain size decreased to a critical value, CYS/TYS reaches to 1 since CYS increases much faster than TYS. By tailoring the microstructure using texture control and grain refinement, it is achievable to optimize yield asymmetry in wrought magnesium alloys.

Li, Dongsheng; Joshi, Vineet V.; Lavender, Curt A.; Khaleel, Mohammad A.; Ahzi, Said

2013-11-01T23:59:59.000Z

428

Manufacturing of SiCp Reinforced Magnesium Composite Tubes by Hot Extrusion Processes  

SciTech Connect

Magnesium alloys have higher specific strength compared with other metals, such as aluminum, copper and steel. Nevertheless, their ductility is still not good for further metal forming and their strength is not large enough for real structure applications. The aim of this paper is to develop magnesium alloy composite tubes reinforced with SiC particulates by the stir-casting method and hot extrusion processes. At first, AZ61/SiCp composite ingots reinforced with 5 wt% SiC particulates are fabricated by the melt-stirring technique. Then, finite element simulations are conducted to analyze the plastic flow of magnesium alloy AZ61 within the die and the temperature distribution of the products. AZ61/SiCp composite tubes are manufactured by hot extrusion using a specially designed die-set for obtaining uniform thickness distribution tubes. Finally, the mechanical properties of the reinforced AZ61/SiCp composite and Mg alloy AZ61 tubes are compared with those of the billets to manifest the advantages of extrusion processes and reinforcement of SiC particulates. The microstructures of the billet and extruded tubes are also observed. Through the improvement of the strength of the tube product, its life cycle can be extended and the energy consumption can be reduced, and eventually the environmental sustainability is achieved.

Hwang, Yeong-Maw [National Sun Yat-Sen University-Department of Mechanical and Electro-mechanical Engineering, No.70, Lien-Hai Rd., Kaohsiung, Taiwan (China); Huang, Song-Jeng; Huang, Yu-San [National Chung Cheng University-Department of Mechanical Engineering, 168 University Rd. Ming-Hsiung, ChiaYi, Taiwan (China)

2011-05-04T23:59:59.000Z

429

Characterization of U-Mo Foils for AFIP-7  

SciTech Connect

Twelve AFIP in-process foil samples, fabricated by either Y-12 or LANL, were shipped from LANL to PNNL for potential characterization using optical and scanning electron microscopy techniques. Of these twelve, nine different conditions were examined to one degree or another using both techniques. For this report a complete description of the results are provided for one archive foil from each source of material, and one unirradiated piece of a foil of each source that was irradiated in the Advanced Test Reactor. Additional data from two other LANL conditions are summarized in very brief form in an appendix. The characterization revealed that all four characterized conditions contained a cold worked microstructure to different degrees. The Y-12 foils exhibited a higher degree of cold working compared to the LANL foils, as evidenced by the highly elongated and obscure U-Mo grain structure present in each foil. The longitudinal orientations for both of the Y-12 foils possesses a highly laminar appearance with such a distorted grain structure that it was very difficult to even offer a range of grain sizes. The U-Mo grain structure of the LANL foils, by comparison, consisted of a more easily discernible grain structure with a mix of equiaxed and elongated grains. Both materials have an inhomogenous grain structure in that all of the characterized foils possess abnormally coarse grains.

Edwards, Danny J.; Ermi, Ruby M.; Schemer-Kohrn, Alan L.; Overman, Nicole R.; Henager, Charles H.; Burkes, Douglas; Senor, David J.

2012-11-07T23:59:59.000Z

430

mo funcionan las Células de Combustible  

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

mo funcionan las Células de Combustible Cómo funcionan las Células de Combustible Diagrama: Como funciona un MPE de combustible de célula. 1. El combustible de hidrógeno es canalizado a través de un campo de placas de flujo para el ánodo al otro lado de la pila de combustible, mientras que el oxígeno del aire se canaliza hacia el cátodo del otro lado de la celda. 2. En el ánodo, un catalizador de platino hace que el hidrógeno se divida en iones positivos de hidrógeno (protones) y electrones de carga negativa. 3. La Membrana de Electrolito Polimérico (MPE) sólo permite que los iones de carga positiva pasen a través de ella hacia el cátodo. Los electrones de carga negativa deben viajar a lo largo de un circuito externo hacia el cátodo, creando una corriente eléctrica. 4. En el cátodo, los electrones y los iones positivos de hidrógeno se combinan con el oxígeno para formar agua, que fluye fuera de la célula.

431

Development of FeNiMoB thin film materials for microfabricated magnetoelastic sensors  

SciTech Connect

Metglas{sup TM} 2826MB foils of 25-30 {mu}m thickness with the composition of Fe{sub 40}Ni{sub 38}Mo{sub 4}B{sub 18} have been used for magnetoelastic sensors in various applications over many years. This work is directed at the investigation of {approx}3 {mu}m thick iron-nickel-molybdenum-boron (FeNiMoB) thin films that are intended for integrated microsystems. The films are deposited on Si substrate by co-sputtering of iron-nickel (FeNi), molybdenum (Mo), and boron (B) targets. The results show that dopants of Mo and B can significantly change the microstructure and magnetic properties of FeNi materials. When FeNi is doped with only Mo its crystal structure changes from polycrystalline to amorphous with the increase of dopant concentration; the transition point is found at about 10 at. % of Mo content. A significant change in anisotropic magnetic properties of FeNi is also observed as the Mo dopant level increases. The coercivity of FeNi films doped with Mo decreases to a value less than one third of the value without dopant. Doping the FeNi with B together with Mo considerably decreases the value of coercivity and the out-of-plane magnetic anisotropy properties, and it also greatly changes the microstructure of the material. In addition, doping B to FeNiMo remarkably reduces the remanence of the material. The film material that is fabricated using an optimized process is magnetically as soft as amorphous Metglas{sup TM} 2826MB with a coercivity of less than 40 Am{sup -1}. The findings of this study provide us a better understanding of the effects of the compositions and microstructure of FeNiMoB thin film materials on their magnetic properties.

Liang Cai; Gooneratne, Chinthaka; Cha, Dongkyu; Chen Long; Kosel, Jurgen [Computer Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955 (Saudi Arabia); Gianchandani, Yogesh [Department of Electrical Engineering and Computer Science, 1301 Beal Ave., University of Michigan, Ann Arbor, Michigan 48109 (United States)

2012-12-01T23:59:59.000Z

432

Construction and Commissioning of a Collinear Laser Spectroscopy Setup at TRIGA Mainz and Laser Spectroscopy of Magnesium Isotopes at ISOLDE (CERN)  

E-Print Network (OSTI)

Construction and Commissioning of a Collinear Laser Spectroscopy Setup at TRIGA Mainz and Laser Spectroscopy of Magnesium Isotopes at ISOLDE (CERN)

Kraemer, Joerg

433

Fabrication of Chemically Doped, High Upper Critical Field Magnesium Diboride Superconducting Wires  

SciTech Connect

Controlled chemical doping of magnesium diboride (MgB2) has been shown to substantially improve its superconducting properties to the levels required for high field magnets, but the doping is difficult to accomplish through the usual route of solid state reaction and diffusion. Further, superconducting cables of MgB2 are difficult to fabricate because of the friable nature of the material. In this Phase I STTR project, doped and undoped boron fibers were made by chemical vapor deposition (CVD). Several >100m long batches of doped and undoped fiber were made by CVD codeposition of boron plus dopants. Bundles of these fibers infiltrated with liquid magnesium and subsequently converted to MgB2 to form Mg-MgB2 metal matrix composites. In a parallel path, doped boron nano-sized powder was produced by a plasma synthesis technique, reacted with magnesium to produce doped MgB2 superconducting ceramic bodies. The doped powder was also fabricated into superconducting wires several meters long. The doped boron fibers and powders made in this program were fabricated into fiber-metal composites and powder-metal composites by a liquid metal infiltration technique. The kinetics of the reaction between boron fiber and magnesium metal was investigated in fiber-metal composites. It was found that the presence of dopants had significantly slowed the reaction between magnesium and boron. The superconducting properties were measured for MgB2 fibers and MgB2 powders made by liquid metal infiltration. Properties of MgB2 products (Jc, Hc2) from Phase I are among the highest reported to date for MgB2 bulk superconductors. Chemically doped MgB2 superconducting magnets can perform at least as well as NbTi and NbSn3 in high magnetic fields and still offer an improvement over the latter two in terms of operating temperature. These characteristics make doped MgB2 an effective material for high magnetic field applications, such as magnetic confined fusion, and medical MRI devices. Developing fusion as an energy source will dramatically reduce energy costs, global warming, and radioactive waste. Cheaper and more efficient medical MRI devices could lower examination costs, find potential health problems earlier, and thus also benefit society as a whole. Other potential commercial applications for this material are devices for the generation and storage of electrical power, thus lowering the cost of delivered electricity.

Marzik, James, V.

2005-10-13T23:59:59.000Z

434

B(E2) values and the search for the critical point symmetry X(5) in 104Mo and 106Mo  

Science Journals Connector (OSTI)

Lifetimes of the first 4+ and 6+ states in 104Mo and 106Mo have been measured using the recoil distance method following spontaneous fission of 252Cf. The experiment was performed at the 88-inch cyclotron of the Lawrence Berkeley National Laboratory employing the Gammasphere array and the New Yale Plunger Device. Reduced transition probabilities in the ground state band of 104Mo are compared with predictions of the critical point symmetry X(5) for phase transitional nuclei between rotational and vibrational shape. While known level energies of 104Mo are in good agreement with the X(5) predictions, the analysis of the measured B(E2) values favors a rotor interpretation.

C. Hutter; R. Krcken; A. Aprahamian; C. J. Barton; C. W. Beausang; M. A. Caprio; R. F. Casten; W.-T. Chou; R. M. Clark; D. Cline; J. R. Cooper; M. Cromaz; A. A. Hecht; A. O. Macchiavelli; N. Pietralla; M. Shawcross; M. A. Stoyer; C. Y. Wu; N. V. Zamfir

2003-05-28T23:59:59.000Z

435

AMoRE: Collaboration for searches for the neutrinoless double-beta decay of the isotope of 100Mo with the aid of 40Ca100MoO4 as a cryogenic scintillation detector  

Science Journals Connector (OSTI)

The AMoRE (Advanced Mo based Rare process Experiment) Collaboration is planning to employ 40Ca100MoO4...single crystals as a cryogenic Scintillation detector for studying the neutrinoless double-beta decay of the...

N. D. Khanbekov

2013-09-01T23:59:59.000Z

436

A Cubic Fe4Mo4 Oxo Framework and Its Reversible Four-Electron Redox Chemistry  

Science Journals Connector (OSTI)

Max Planck Institute for Chemical Energy Conversion (formerly Bioinorganic Chemistry), Stiftstrae 34?36, 45470 Mlheim, Germany ... Indeed, a salt with a FeII2FeIII2MoVI4 constellation, [Fe4Mo4](TCNQ)2 (2), could be isolated after treatment with TCNQ. ... data indicate that the binding energies of all the elements in the title compds. ...

Jan P. Falkenhagen; Beatrice Braun; Eckhard Bill; Dominik Sattler; Christian Limberg

2014-07-01T23:59:59.000Z

437

Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant  

E-Print Network (OSTI)

! ! ! Corrosion Behavior of Solution- Annealed CoCrMo Medical Implant Alloys Pooja Panigrahi University June 6, 2011 #12;! ! ""! Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant Alloys and Applied Sciences Northwestern University June 6, 2011 Abstract Corrosion behavior of solution annealed

Shull, Kenneth R.

438

Magnetically Mediated Transparent Conductors: In2O3 Doped with Mo J. E. Medvedeva*  

E-Print Network (OSTI)

Magnetically Mediated Transparent Conductors: In2O3 Doped with Mo J. E. Medvedeva* Department August 2006) First-principles band structure investigations of the electronic, optical, and magnetic properties of Mo- doped In2O3 reveal the vital role of magnetic interactions in determining both

Medvedeva, Julia E.

439

GoPoMoSA: A Goal-Oriented Process Modeling and Simulation Advisor  

E-Print Network (OSTI)

and improvement. This paper presents GoPoMoSA (Goal-oriented Process Modeling and Simulation Advisor), a semi-automatedGoPoMoSA: A Goal-Oriented Process Modeling and Simulation Advisor Xu Bai and LiGuo Huang Dept and Simulation Advisor that semi-automatically discovers suitable Software Process Modeling and Simula- tion

Egyed, Alexander

440

Kinetic, Mechanistic, and Spectroscopic Studies of the Mo/Cu Containing CO dehydrogenase of Oligotropha carboxidovorans  

E-Print Network (OSTI)

et. al. where active site models [Tp iPr MoO(OAr)(?-S)Cu(triazacyclononane) (Tp iPr ) = hydrotris(3-isopropylpyrazol-of CO dehydrogenase: [Tp iPr Mo (V) (O)(OAr)(?-S)Cu (I) (Me

Wilcoxen, Jarett Michael

2013-01-01T23:59:59.000Z

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


441

Stability of Graphene doping with MoO_3 and I_2  

E-Print Network (OSTI)

We dope graphene by evaporation of MoO_3 or by solution-deposition of I_2 and assess the doping stability for its use as transparent electrodes. Electrical measurements show that both dopants increase the graphene sheet conductivity and find that Mo...

DArsi, Lorenzo; Esconjauregui, Santiago; Weatherup, Robert; Guo, Yuzheng; Bhardwaj, Sunil; Centeno, Alba; Zurutuza, Amaia; Cepek, Cinzia; Robertson, John

2014-09-08T23:59:59.000Z

442

Domestic production of medical isotope Mo-99 moves a step closer  

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

Domestic production of medical isotope Mo-99 Domestic production of medical isotope Mo-99 Domestic production of medical isotope Mo-99 moves a step closer Irradiated uranium fuel has been recycled and reused for molybdenum-99 (Mo-99) production, with virtually no losses in Mo-99 yields or uranium recovery. May 13, 2013 From left, Los Alamos scientists Roy Copping, Sean Reilly, and Daniel Rios. Copping examines the Buchi Multivapor P-12 Evaporator, and Reilly and Rios are at the Agilent Technologies Cary 60 UV-Vis Spectrometer. From left, Los Alamos scientists Sean Reilly, Roy Copping, and Daniel Rios. Sean is looking at the Buchi Multivapor P-12 Evaporator, and Roy and Daniel are at the Agilent Technologies Cary 60 UV-Vis Spectrometer. Contact Nancy Ambrosiano Communications Office (505) 667-0471

443

Photo-oxidation method using MoS2 nanocluster materials  

DOE Patents (OSTI)

A method of photo-oxidizing a hydrocarbon compound is provided by dispersing MoS.sub.2 nanoclusters in a solvent containing a hydrocarbon compound contaminant to form a stable solution mixture and irradiating the mixture to photo-oxide the hydrocarbon compound. Hydrocarbon compounds of interest include aromatic hydrocarbon and chlorinated hydrocarbons. MoS.sub.2 nanoclusters with an average diameter less than approximately 10 nanometers are shown to be effective in decomposing potentially toxic aromatic and chlorinated hydrocarbons, such as phenol, pentachlorophenol, chlorinated biphenols, and chloroform, into relatively non-toxic compounds. The irradiation can occur by exposing the MoS.sub.2 nanoclusters and hydrocarbon compound mixture with visible light. The MoS.sub.2 nanoclusters can be introduced to the toxic hydrocarbons as either a MoS.sub.2 solution or deposited on a support material.

Wilcoxon, Jess P. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

444

Development of LEU targets for {sup 99}Mo production and their chemical processing status 1993  

SciTech Connect

Most of the world`s supply of {sup 99m}{Tc} for medical purposes is currently produced from {sup 99}Mo derived from the fastening of high enriched uranium (HEU). Substitution of low enriched uranium (LEU) silicide fuel for the HEU alloy and aluminide fuels used in current target designs will allow equivalent {sup 99}Mo yields with little change in target geometries. Substitution of uranium metal for uranium oxide films in other target designs will also allow the substitution of LEU for HEU. In 1993, DOE renewed funding that was terminated in 1990 for development of LEU targets for {sup 99}Mo production. During the past year, our efforts were to (1) renew contact with {sup 99}Mo producers, (2) define the means to test our process for recovering {sup 99}Mo from irradiated LEU-silicide targets, and (3) begin to test our process on spent LEU-silicide miniplates stored at ANL from past fuel development studies.

Vandegrift, G.F.; Hutter, J.C.; Srinivasan, B.; Matos, J.E.; Snelgrove, J.L.

1993-10-01T23:59:59.000Z

445

Electrical properties of a-C:Mo films produced by dual-cathode filtered cathodic arc plasma deposition  

E-Print Network (OSTI)

and Related Materials Electrical properties of a-C:Mo filmsNo. DE-AC02-05CH11231. Electrical properties of a-C:Mo filmsair. Film resistivity and electrical activation energy were

Sansongsiri, Sakon

2008-01-01T23:59:59.000Z

446

Electronic Structure Description of the Cis-MoOS Unit in Models for Molybdenum Hydroxylases  

SciTech Connect

The molybdenum hydroxylases catalyze the oxidation of numerous aromatic heterocycles and simple organics and, unlike other hydroxylases, utilize water as the source of oxygen incorporated into the product. The electronic structures of the cis-MoOS units in CoCp{sub 2}[Tp{sup iPr}Mo{sup V}OS(OPh)] and Tp{sup iPr}Mo{sup VI}OS(OPh) (Tp{sup iPr} = hydrotris(3-isopropylpyrazol-1-yl)borate), new models for molybdenum hydroxylases, have been studied in detail using S K-edge X-ray absorption spectroscopy, vibrational spectroscopy, and detailed bonding calculations. The results show a highly delocalized Mo {double_bond} S {pi}* LUMO redox orbital that is formally Mo(d{sub xy}) with {approx}35% sulfido ligand character. Vibrational spectroscopy has been used to quantitate Mo-S{sub sulfido} bond order changes in the cis-MoOS units as a function of redox state. Results support a redox active molecular orbital that has a profound influence on MoOS bonding through changes to the relative electro/nucleophilicity of the terminal sulfido ligand accompanying oxidation state changes. The bonding description for these model cis-MoOS systems supports enzyme mechanisms that are under orbital control and dominantly influenced by the unique electronic structure of the cis-MoOS site. The electronic structure of the oxidized enzyme site is postulated to play a role in polarizing a substrate carbon center for nucleophilic attack by metal activated water and acting as an electron sink in the two-electron oxidation of substrates.

Doonan, C.J.; Rubie, N.D.; Peariso, K.; Harris, H.H.; Knottenbelt, S.Z.; George, G.N.; Young, C.G.; Kirk, M.L.; /New Mexico U. /Melbourne U. /SLAC, SSRL

2009-04-29T23:59:59.000Z

447

99Mo/99mTc separation: An assessment of technology options  

Science Journals Connector (OSTI)

Several strategies for the effective separation of 99mTc from 99Mo have been developed and validated. Due to the success of column chromatographic separation using acidic alumina coupled with high specific activity fission 99Mo (F 99Mo) for production of 99Mo/99mTc generators, however, most technologies until recently have generated little interest. The reduced availability of F 99Mo and consequently the shortage of 99Mo/99mTc column generators in the recent past have resurrected interest in the production of 99Mo as well as 99mTc by alternate routes. Most of these alternative production processes require separation techniques capable of providing clinical grade 99mTc from low specific activity 99Mo or irradiated Mo targets. For this reason there has been renewed interest in alternate separation routes. This paper reviews the reported separation technologies which include column chromatography, solvent extraction, sublimation and gel systems that have been traditionally used for the fabrication of 99Mo/99mTc generator systems. The comparative advantage, disadvantage, and technical challenges toward adapting the emerging requirements are discussed. New developments such as solid-phase column extraction, electrochemical separation, extraction chromatography, supported liquid membrane (SLM) and thermochromatographic techniques are also being evaluated for their potential application in the changed scenario of providing 99mTc from alternate routes. Based on the analysis provided in this review, it appears that some proven separation technologies can be quickly resurrected for the separation of clinical grade 99mTc from macroscopic levels of reactor or cyclotron irradiated molybdenum targets. Furthermore, emerging technologies can be developed further to respond to the expected changing modes of 99mTc production.

Ashutosh Dash; F.F. (Russ) Knapp Jr.; M.R.A. Pillai

2013-01-01T23:59:59.000Z

448

Optical properties of Mo6S3I6 nanowires  

Science Journals Connector (OSTI)

Optical reflectivity and absorbance measurements of oriented Mo6S3I6 nanowire thin films and dispersions in different solvents are presented extending from the far infrared to the ultraviolet. In spite of the highly one-dimensional character of the nanowire material and narrow electronic valence and conduction subbands, as predicted by the density-functional theory calculations, sharp Van Hove features in the optical absorption spectra are not observed, partly because of the large density of interpenetrating electron subbands and partly due to damping and disorder. The optically measured electrical conductivity extrapolated to zero frequency ?1(??0) and the calculated conductivity are significantly higher than the typical dc value from resistance measurements, indicating that disorder limits electron transport, a feature characteristic of strongly one-dimensional systems.

D. Vengust; F. Pfuner; L. Degiorgi; I. Vilfan; V. Nicolosi; J. N. Coleman; D. Mihailovic

2007-08-08T23:59:59.000Z

449

United States Environmental Protection Agency | Office of Radiation and Indoor Air (6608J) | EPA 402-F-07-010 | May 2007 WIPP: Planned Change Request for Magnesium Oxide (MgO)  

E-Print Network (OSTI)

402-F-07-010 | May 2007 WIPP: Planned Change Request for Magnesium Oxide (MgO) The U.S. Department Request for Magnesium Oxide." The document includes information regarding the detailed proposal

450

Comparative study of gel-based separated arc-discharge, HiPCO, and CoMoCAT carbon nanotubes  

E-Print Network (OSTI)

Nano Res 1 Comparative study of gel-based separated arc-discharge, HiPCO, and CoMoCAT carbon) Comparative Study of Gel-based Separated Arc-discharge, HiPCO, and CoMoCAT Carbon Nanotubes kinds of mainstream carbon nanotubes (arc-discharge, HiPCO, CoMoCAT) separated using low-cost gel

Zhou, Chongwu

451

Electronic structure and point defect concentrations of \\{C11b\\} MoSi2 by first-principles calculations  

Science Journals Connector (OSTI)

Abstract The electronic structure and point defect concentrations of \\{C11b\\} MoSi2 were studied systematically by the first-principles calculations based on density functional theory. Mo vacancy-induced charge density shows strong directional covalent bonds caused by hybridization of Mo-4d and Si-3p orbitals, which indicates that MoSi2 has low fracture toughness at room temperature. Combining with WagnerSchottky model, these point defect concentrations of \\{C11b\\} MoSi2 at 2173, 1673, 1223, 773K as function of composition were also investigated. It is found that the point defect concentrations change drastically for off-stoichiometric compounds. The main structural defects are preferably Mo vacancies or Si anti-structure atoms on the Mo sublattices in Si-rich alloy, and Mo anti-site in Mo-rich alloy, respectively. According to the calculated effective formation enthalpies of point defects, the effective formation enthalpies from big to small in sequence are Mo anti-site, Si anti-site and vacancy (Mo and Si). This result suggests that the vacancy, especially for Si vacancy, is a main type of point defect in \\{C11b\\} MoSi2 system.

X.P. Li; S.P. Sun; H.J. Wang; W.N. Lei; Y. Jiang; D.Q. Yi

2014-01-01T23:59:59.000Z

452

SiMoL A Modeling Language for Simulation and (Re-)Configuration Iulia Nica and Franz Wotawa  

E-Print Network (OSTI)

be used for both simulation and configuration purposes. SiMoL is an object- oriented language that allows for (restricted) simulation and con- figuration at the same time. SiMoL is an object-oriented languageSiMoL­ A Modeling Language for Simulation and (Re-)Configuration Iulia Nica and Franz Wotawa

Jannach, Dietmar

453

Synthesis and characterization of novel group VI metal (Mo, W) nitride and oxide compounds  

SciTech Connect

Investigations into the preparation of tungsten nitrides have involved the synthesis of molecular precursors, and their conversion to tungsten nitrides at relatively low temperatures. Two interesting molecular precursors, [WNCl{sub 3}{center_dot}NCCH{sub 3}]{sub 4} and WN(N{sub 3}){sub 3}{center_dot}xNCCH{sub 3}, have been prepared and characterized. The molecular structure of the first consists of a W{sub 4}N{sub 4} tetrameric core with multiple and single W-N bonds arranged in an alternating fashion. Three new solid state phases, amorphous W{sub 3}N{sub 5}, cubic WN, and W{sub 2}N{sub 2}(C{sub 2}N{sub 2}), have been discovered by solid state and chemical vapor transport reactions. The structures have been investigated. A systematic study in the Ln{sub 2}O{sub 3}-MoO{sub 3}-Mo (Ln = La, Ce, Pr, Nd, Sm) system has been explored to better understand LnMo{sub 8}O{sub 14}. The study has shown that the sizes of the rare-earth cations affect the formation of these phases. Larger cations (La, Ce, and Pr) aid in the formation of trans-Mo{sub 8} bicapped octahedra, and the smaller cations (Nd, Sm) only stabilize the cis-Mo{sub 8} bicapped octahedra. Magnetic susceptibility measurements have indicated that no effective moment contribution arises from the Mo{sub 8} metal clusters, even though the cis-Mo{sub 8} cluster in LnMo{sub 8}O{sub 14}, containing all cis-Mo{sub 8} octahedra, apparently contains an odd number of electrons (23). Electrical resistivity measurements and electronic structure calculations have shown that the LnMo{sub 8}O{sub 14} compounds containing cis-Mo{sub 8} clusters are metallic, and the LnMo{sub 8}O{sub 14} compounds containing a 1:1 ratio of cis- to trans-Mo{sub 8} clusters are semiconducting.

Zhang, Z.

1998-02-23T23:59:59.000Z

454

Magnesium cage shows promise for carbon capture http://www.rsc.org/chemistryworld/News/2009/December/01120901.asp[12/2/2009 12:27:18 PM  

E-Print Network (OSTI)

Magnesium cage shows promise for carbon capture http://www.rsc.org/chemistryworld/News/2009 Links Tools Magnesium cage shows promise for carbon capture 01 December 2009 US chemists have shown and selectively capture carbon dioxide from a mixture of gases and subsequently release it using little energy

Yaghi, Omar M.

455

Laser cladding Al-Si/Al2O3-TiO2 composite coatings on AZ31B magnesium alloy  

Science Journals Connector (OSTI)

To improve the wear resistance and corrosion resistance of magnesium alloys, a 5 kW continuous wave CO2 laser was used to investigate the laser surface cladding on AZ31B magnesium alloys with Al-Si/...2O3 -TiO2.....

Zeqin Cui ???; Hongwei Yang

2012-12-01T23:59:59.000Z

456

Magnesium deficiency and type of protein during gestation and lactation in rats  

E-Print Network (OSTI)

to the irregular schedule of cage clean1ng. 13 Animals were observed for physical signs of magnesium deficiency. Upon parturition the stainless steel grids were removed from the cages, and dams and pups were maintained on the wood-chip bedding... in a machine designed for this pur- pose. Clean cages with fresh wood-chip bedding were provided as needed, and clean feeders were provided weekly. All other instruments and glassware used in the study were acid-washed in 10% nitric acid or soaked...

Holmes, Kathryn Ellen Hughes

1988-01-01T23:59:59.000Z

457

Effects of dietary potassium and sodium on magnesium and potassium balance in lambs  

E-Print Network (OSTI)

allow a more adequate evaluation of the K status of an animal. Magnesium (Mg) absorption is depressed when animals are fed high levels of K (Greene, 1983a, b, c; Field and Suttle, 1979; MacGregor and Armstrong, 1979; Thomas and Potter, 1976; Suttle... reserves of K in contrast to the bone reserves of Ca, Mg, Na or P. The normal kidney functions to remove excess K from the plasma and even under dangerously low body K concentrations, renal excretion of X continues. Cowan and Phillips (1973) observed a...

Poe, Julie Hamilton

1984-01-01T23:59:59.000Z

458

A Greenhouse-Scale Photosynthetic Microbial Bioreactor for Carbon Sequestration in Magnesium Carbonate Minerals  

Science Journals Connector (OSTI)

A Greenhouse-Scale Photosynthetic Microbial Bioreactor for Carbon Sequestration in Magnesium Carbonate Minerals ... The bioreactor was located in a greenhouse which maintained a minimum air temperature of 18 C and received at least 14 h of light/day through combined natural and artificial lighting. ... We provide a detailed account of the natural process of carbon trapping and storage as it occurs at Clinton Creek and Cassiar, including mineralogy, modes of occurrence, methods of formation for carbonate alteration, light stable isotope geochem., and radiocarbon anal. ...

Jenine McCutcheon; Ian M. Power; Anna L. Harrison; Gregory M. Dipple; Gordon Southam

2014-07-29T23:59:59.000Z

459

Mon. Not. R. Astron. Soc. 000, 122 (2011) Printed 29 July 2011 (MN LATEX style file v2.2) A grid of NLTE corrections for magnesium and calcium in  

E-Print Network (OSTI)

of NLTE corrections for magnesium and calcium in late-type giant and supergiant stars: application to Gaia ?. Received ?; in original form ? ABSTRACT We investigate NLTE effects for magnesium and calcium the Galaxy. Calcium (Ca) and magnesium (Mg) are key elements for the understanding of these events since

Paris-Sud XI, Université de

460

JOURNAL DE PHYSIQUE Colloque C5, suppliment au no 5, Tome 40, Mai 1979, page C5-38 Magnetoresistance and anomalous Hall effect of magnesium singIe crystals  

E-Print Network (OSTI)

-38 Magnetoresistance and anomalous Hall effect of magnesium singIe crystals with heavy rare earth impurities J. Bijvoet splitting, the magnetization of rare earth ions in magnesium single crystals is anisotropic at low and cannot be explained by crystal field splitting of the 4f levels. Single crystals of magnesium with small

Paris-Sud XI, Université de

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


461

The effect of a prolonged magnesium restriction on the humoral immune response in maternal rats and their offspring  

E-Print Network (OSTI)

TIIE EFFECT 0F A PR0L0NGED MAGNESIUM RESTRI CTI0N ON THE HUMORAL IMMUNE RESPONSE IN HATERHAL RATS AHD THEIR OFFSPRING A Thesis by DIANE T. COHILL Submitted to the Graduate College of Texas ASM University in Partial fulfillment... of the requirements for the degree of MASTER OF SC IENCE May 1987 Major Subject: Nutrition THE EFFECT OF A PROLONGED MAGNESIUM RESTRICTION ON THE HUMORAL IMMUNE RESPONSE IN MATERNAL RATS AND THEIR OFFSPRING A Thesis by DIANE T. COHILL Approved as to sty le...

Cohill, Diane T

2012-06-07T23:59:59.000Z

462

Effect of dietary magnesium and calcium on blood lipids and minerals in tissues in rats fed a high fat diet  

E-Print Network (OSTI)

EFFECT OF DIETARY MAGNESIUM AND CALCIUM ON BLOOD LIPIDS AND MINERALS ZN TISSUES IN BATS FED A HIGH FAT DIET A Thesis by JEAN CONBOY-DONNS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1991 Major Subject: Nutrition EFFECT OF DIETARY MAGNESIUM AND CALCIUM ON BLOOD LIPZDS AND MZNERALS ZN TISSUES IN RATS FED A BIGS FAT DIET A Thesis by JEAN CONBOY-DOWNS Approved as to style...

Conboy-Downs, Jean

2012-06-07T23:59:59.000Z

463

Ash, calcium, phosphorus and magnesium content of the metacarpus of hereford cows under different nutritional and physiological conditions  

E-Print Network (OSTI)

of hone is (plant Ltntivc Jy expl essed as lr~ &3 p0/ )2]3 ~ CnOOq. Other su ncrals besides calcium mhich are present in bone are phosphorus, magnesium' odium, chlorine and fluorine. The skeletal system is the main. depot for calcium, phosphorus...ASH, CALCIUM, PHOSPHORUS AND MAGNESIUM CONTENT OF THE METACARPUS OF HEREFORD COWS UNDER DIFFERENT NUTRITIONAL AND PHYSIOLOGICAL CONDITIONS A Thesis By MOZAMMEL HAQUE Submitted to the Graduate College of the Texas A&M University in partial...

Haque, Mozammel

2012-06-07T23:59:59.000Z

464

Investigation of the optical properties of MoS{sub 2} thin films using spectroscopic ellipsometry  

SciTech Connect

Spectroscopic ellipsometry (SE) characterization of layered transition metal dichalcogenide (TMD) thin films grown by vapor phase sulfurization is reported. By developing an optical dispersion model, the extinction coefficient and refractive index, as well as the thickness of molybdenum disulfide (MoS{sub 2}) films, were extracted. In addition, the optical band gap was obtained from SE and showed a clear dependence on the MoS{sub 2} film thickness, with thinner films having a larger band gap energy. These results are consistent with theory and observations made on MoS{sub 2} flakes prepared by exfoliation, showing the viability of vapor phase derived TMDs for optical applications.

Yim, Chanyoung; O'Brien, Maria; Winters, Sinad [School of Chemistry, Trinity College Dublin, Dublin 2 (Ireland); Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2 (Ireland); McEvoy, Niall [Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2 (Ireland); Mirza, Inam; Lunney, James G. [Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2 (Ireland); School of Physics, Trinity College Dublin, Dublin 2 (Ireland); Duesberg, Georg S., E-mail: duesberg@tcd.ie [School of Chemistry, Trinity College Dublin, Dublin 2 (Ireland); Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2 (Ireland); Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College Dublin, Dublin 2 (Ireland)

2014-03-10T23:59:59.000Z

465

Density functional theory investigation of the electronic structure and thermoelectric properties of layered MoS{sub 2}, MoSe{sub 2} and their mixed-layer compound  

SciTech Connect

First principles density functional theory calculations were carried out for the 2H-MoQ{sub 2} (Q=S and Se) and their hypothetical mixed-layer compound. Due to the different electronegativities of S and Se atoms on MoQ{sub 2}, the band gap size could be adjusted in mixed-layer compound MoS{sub 2}/MoSe{sub 2}. Also, the indirect band gap in pure MoQ{sub 2} compounds is changed to the pseudo direct band gap in mixed-layer MoS{sub 2}/MoSe{sub 2} which is similar to the monolayer compound. The layer mixing enhances the thermoelectric properties because of the increased density of states around the Fermi level and the decreased band gap size. Therefore, we suggest that this layer mixing approach should be regarded as a useful way to modulate their electronic structures and to improve their thermoelectric properties. -- Graphical abstract: On the basis of density functional calculations we predict that the mixed-layer compounds 2H-MoS{sub 2}/2H-MoSe{sub 2}, in which two different layers 2H-MoS{sub 2} and 2H-MoSe{sub 2}, have enhanced thermoelectric properties because of the increased density of states around the Fermi level and the decreased band gap size. Highlights: We explored a way of improving TE properties of 2H-MoQ{sub 2} on DFT methods. The mixed-layer compounds MoS{sub 2}/MoSe{sub 2} have enhanced thermoelectric properties. This is caused by modulated electronic structure of mixed layer compound. Layer mixing approach should be regarded as a useful way to improve TE properties.

Lee, Changhoon; Hong, Jisook [Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Lee, Wang Ro [Faculty of Liberal Education, Chonbuk National University, Jeonju, Jeonbuk 561-756 (Korea, Republic of); Kim, Dae Yeon [Agency for Defense Development (ADD), Chinhae, Kyungnam 645-600 (Korea, Republic of); Shim, Ji Hoon, E-mail: jhshim@postech.ac.kr [Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Divisions of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)

2014-03-15T23:59:59.000Z

466

Manufacture of gradient micro-structures of magnesium alloys using two stage extrusion dies  

SciTech Connect

This paper aims to manufacture magnesium alloy metals with gradient micro-structures using hot extrusion process. The extrusion die was designed to have a straight channel part combined with a conical part. Materials pushed through this specially-designed die generate a non-uniform velocity distribution at cross sections inside the die and result in different strain and strain rate distributions. Accordingly, a gradient microstructure product can be obtained. Using the finite element analysis, the forming temperature, effective strain, and effective strain rate distributions at the die exit were firstly discussed for various inclination angles in the conical die. Then, hot extrusion experiments with a two stage die were conducted to obtain magnesium alloy products with gradient micro-structures. The effects of the inclination angle on the grain size distribution at cross sections of the products were also discussed. Using a die of an inclination angle of 15, gradient micro-structures of the grain size decreasing gradually from 17 ?m at the center to 4 ?m at the edge of product were achieved.

Hwang, Yeong-Maw; Huang, Tze-Hui [Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, No. 70, Lien-Hai Rd., Kaohsiung, 804, Taiwan (China); Alexandrov, Sergei [Institute for Problems in Mechanics, Russian Academy of Sciences, Moscow (Russian Federation); Naimark, Oleg Borisovich [Institute of Continuous Media Mechanics, Russian Academy of Sciences, Perm (Russian Federation); Jeng, Yeau-Ren [Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-tech Innovations, National Chung Cheng University, Ming-Hsiung, Chia-Yi 621, Taiwan (China)

2013-12-16T23:59:59.000Z

467

Magnesium behavior and structural defects in Mg+ ion implanted silicon carbide  

SciTech Connect

As a candidate material for fusion reactor applications, silicon carbide (SiC) undergoes transmutation reactions under high-energy neutron irradiation with magnesium as the major metallic transmutant; the others include aluminum, beryllium and phosphorus in addition to helium and hydrogen gaseous species. The impact of these transmutants on SiC structural stability is currently unknown. This study uses ion implantation to introduce Mg into SiC. Multiaxial ion-channeling analysis of the as-produced damage state suggests that there are preferred Si <100> interstitial splits. The microstructure of the annealed sample was examined using high-resolution scanning transmission electron microscopy. The results show a high concentration of likely non-faulted tetrahedral voids and possible stacking fault tetrahedra near the damage peak. In addition to lattice distortion, dislocations and intrinsic and extrinsic stacking faults are also observed. Magnesium in 3C-SiC prefers to substitute for Si and it forms precipitates of cubic Mg2Si and tetragonal MgC2. The diffusion coefficient of Mg in 3C-SiC single crystal at 1573 K has been determined to be 3.80.410e-19 m2/sec.

Jiang, Weilin; Jung, Hee Joon; Kovarik, Libor; Wang, Zhaoying; Roosendaal, Timothy J.; Zhu, Zihua; Edwards, Danny J.; Hu, Shenyang Y.; Henager, Charles H.; Kurtz, Richard J.; Wang, Yongqiang

2015-01-01T23:59:59.000Z

468

Tunable hydrogen storage in magnesiumtransition metal compounds: First-principles calculations  

Science Journals Connector (OSTI)

Magnesium dihydride (MgH2) stores 7.7?wt?% hydrogen but it suffers from a high thermodynamic stability and slow (de)hydrogenation kinetics. Alloying Mg with lightweight transition metals (TM) (=Sc,Ti,V,Cr) aims at improving the thermodynamic and kinetic properties. We study the structure and stability of MgxTM1?xH2 compounds, x=[01], by first-principles calculations at the level of density functional theory. We find that the experimentally observed sharp decrease in hydrogenation rates for x?0.8 correlates with a phase transition of MgxTM1?xH2 from a fluorite to a rutile phase. The stability of these compounds decreases along the series Sc, Ti, V, and Cr. Varying the TM and the composition x, the formation enthalpy of MgxTM1?xH2 can be tuned over the substantial range of 02 eV/f.u. Assuming however that the alloy MgxTM1?x does not decompose upon dehydrogenation, the enthalpy associated with reversible hydrogenation of compounds with a high magnesium content (x=0.75) is close to that of pure Mg.

Sleyman Er; Dhirendra Tiwari; Gilles A. de Wijs; Geert Brocks

2009-01-09T23:59:59.000Z

469

Experimental investigation of anisotropy evolution of AZ31 magnesium alloy sheets under tensile loading  

SciTech Connect

Increasing demand for lighter final products has created new opportunities for the application of new light weight materials. Due to high strength to density ratio and good magnetic resistance properties, magnesium alloys are good candidates to replace steel and aluminum for same application. However, limited numbers of active slip deformation mechanisms, result in a decreased formability at room temperature. Furthermore, wrought magnesium alloys have an initial crystallographic texture, remained from the prior rolling operations, which makes them highly anisotropic. In this paper, tensile tests are performed at room temperature and 200 deg. C at different strain rates and orientations relative to the rolling direction, including rolling, 30 deg., 45 deg., 60 deg. and transverse orientation. The strain rates adopted for these experiments varied from 0.001 to 1.0. The testing results show the effect of temperature on the strain rate sensitivity of AZ31 sheets. The extent of deformation is continuously recorded using two separate high temperature extensometers. The results of testing show an increase in the r-values with the plastic deformation. The strain rate sensitivity of AZ31 increased as the temperature was elevated. At higher strain rates the measured r-values are larger and the slope of its evolution with the plastic strain is steeper.

Tari, D. Ghaffari; Worswick, M. J. [University of Waterloo, 200 University Ave West, Waterloo, Ontario (Canada)

2011-05-04T23:59:59.000Z

470

EBSD analysis of magnesium addition on inclusion formation in SS400 structural steel  

SciTech Connect

In this study, the effect of magnesium addition on the inclusion formation in SS400 steel was investigated. The experimental specimens with and without Mg addition treatment were compared. The microstructure was observed using optical microscopy after etching with 3% nital. The morphology and chemical composition of the inclusions were analyzed via scanning electron microscopy and energy dispersive spectrometry. The lattice structure and orientation of the inclusions were identified by electron backscattering diffraction. The average size of inclusions in SS400 was between 0.67 and 0.75 ?m, and between 0.65 and 0.68 ?m in SS400 + Mg. The 2 ppm Mg addition resulted in the oxide formation change from Al{sub 2}O{sub 3} to MgOAl{sub 2}O{sub 3} and in the inclusion formation change from Al{sub 2}O{sub 3}MnS to MgOAl{sub 2}O{sub 3}MnS. Moreover, a simple-phase MnS with an average grain size of 1 ?m to 2 ?m was observed in rod-like, globular, and polyhedron forms. - Highlights: The effect of magnesium addition was investigated for SS400 steel. 2 ppm Mg addition changes the inclusion formation from Al2O3-MnS to MgOAl2O3-MnS. MnS observed in inclusions exhibits rod-like, globular, and polyhedron forms.

Luo, Sin-Jie [Department of Materials Science and Engineering, National Cheng-Kung University, No. 1, University Road, Tainan 701, Taiwan (China); Su, Yen-Hao Frank; Lu, Muh-Jung [China Steel Corporation, Kaohsiung 81233, Taiwan (China); Kuo, Jui-Chao, E-mail: jckuo@mail.ncku.edu.tw [Department of Materials Science and Engineering, National Cheng-Kung University, No. 1, University Road, Tainan 701, Taiwan (China)

2013-08-15T23:59:59.000Z

471

A Compiled Catalogue of Spectroscopically Determined Elemental Abundances for Stars with Accurate Parallaxes. I.Magnesium  

E-Print Network (OSTI)

We present a compiled catalogue of effective temperatures, surface gravities, iron and magnesium abundances, distances, velocity components, and orbital elements for stars in the solar neighborhood. The atmospheric parameters and iron abundances are averages of published values derived from model synthetic spectra for a total of about 2000 values in 80 publications. Our relative magnesium abundances were found from 1412 values in 31 publications for 876 dwarfs and subgiants using a three-step iteration averaging procedure, with weights assigned to each source of data as well as to each individual determination and taking into account systematic deviations of each scale relative to the reduced mean scale. The estimated assumed completeness for data sources containing more than five stars, up to late December 2003, exceeds 90%. For the vast majority of stars in the catalogue, the spatial velocity components were derived from modern high-precision astrometric observations, and their Galactic orbit elements were computed using a three-component model of the Galaxy, consisting of a disk, a bulge, and a massive extended halo.

T. V. Borkova; V. A. Marsakov

2005-03-28T23:59:59.000Z

472

Friction Stir Lap Welding of Magnesium Alloy to Steel: A Preliminary Investigation  

SciTech Connect

An initial study was made to evaluate the feasibility of joining Magnesium alloy AZ31 sheet to galvanized steel sheet in lap configuration using friction stir welding (FSW). Two different automotive sheet steels were used for comparative evaluation of the dissimilar joining potential; a 0.8mm thick, electro galvanized (EG) mild steel, and a 1.5mm thick hot dipped galvanized (HDG) high-strength, low-alloy steel (HSLA). These steels were joined to 2.33mm thick AZ31B magnesium sheet. A single FSW tool design was used for both dissimilar welds, and process parameters were kept the same. Average peak load for the AZ31-1.5 mm steel weld joint in lap shear mode was found to be 6.3 1.0 kN. For the AZ31-0.8 mm steel weld, joint strength was 5.1 1.5 kN. Microstructural investigation indicates melting of the Zn coating at the interface and subsequent alloying with the Mg sheet resulting in formation of solidified Zn-Mg alloy layer at AZ31/steel interface.

Jana, Saumyadeep; Hovanski, Yuri; Grant, Glenn J.

2010-12-01T23:59:59.000Z

473

Structure-dielectric properties relationships in copper-substituted magnesium ferrites  

SciTech Connect

Graphical abstract: - Highlights: Synthesis of copper substituted magnesium ferrites materials is reported. A shift from cubic to tetragonal structure starting with x = 0.84 was observed. The dielectric properties are influenced by Cu-substitution. - Abstract: Nanocrystalline powders of copper-substituted magnesium ferrites with general formula Mg{sub 1?x}Cu{sub x}Fe{sub 2}O{sub 4} (x = 0.00, 0.17, 0.34, 0.50, 0.67, 0.84, 1.00) were prepared for the first time by solgel auto-combustion method, using glycine as fuel agent. Solid phase chemical reactions and the occurrence of spinel structure were monitored by using infrared spectroscopy. X-ray diffraction analysis confirmed the spinel single-phase formation. A shift from cubic structure to tetragonal structure starting with x = 0.84 was also observed. Microstructure of the samples was analyzed by scanning electron microscopy and particle size was estimated from the micrographs. Analysis of dielectric properties revealed very low values of dielectric loss at frequencies over 10 MHz.

Druc, A.C.; Borhan, A.I. [Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi (Romania); Nedelcu, G.G.; Leontie, L. [Faculty of Physics, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi (Romania); Iordan, A.R. [Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi (Romania); Palamaru, M.N., E-mail: palamaru@uaic.ro [Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi (Romania)

2013-11-15T23:59:59.000Z

474

Identification of an advanced constitutive model of Magnesium alloy AZ31B  

SciTech Connect

The main aim of this paper is to study the flow behavior of the AZ31B magnesium alloy by means of tensile tests performed in extended ranges of temperature and strain rates. The flow stress-strain curves analyzed by power law type constitutive equation can only fit well with experimental curves at the work-hardening stage. A new mathematical model is studied to describe the softening behavior of material based on tensile experiments. The relative parameters are obtained by fitting the equation with the experimental data. The genetic algorithm has been used to obtain the global optimal fitting parameters. The comparison between the fitted and experimental data proves the effectiveness of the model. The results indicate that this model leads to a better simulation of the flow stress during the softening stage than that of the power law equation. Based on this model, the deep drawing process has been simulated with the commercial finite element code FORGE registered. The punch load and thickness distribution of AZ31 sheet have been studied. The study of the results is helpful to the application of the stamping technology for the magnesium alloy sheet.

Liu, Z. G.; Massoni, E. [CEMEF, Centre de Mise en Forme des Materiaux, Ecole Nationale Superieure des Mines de Paris 1, rue Claude Daunesse, BP 207, 06904, Sophia-Antipolis Cedex (France)

2011-05-04T23:59:59.000Z

475

Optimized deposition and characterization of nanocrystalline magnesium indium oxide thin films for opto-electronic applications  

Science Journals Connector (OSTI)

Transparent conducting magnesium indium oxide films (MgIn2O4) were deposited on to quartz substrates without a buffer layer at an optimized deposition temperature of 450C to achieve high transmittance in the visible spectral range and electrical conductivity in the low temperature region. Magnesium ions are distributed over the tetrahedral and octahedral sites of the inverted spinel structure with preferential orientation along (311) Miller plane. The possible mechanism that promotes conductivity in this system is the charge transfer between the resident divalent (Mg2+) and trivalent (In3+) cations in addition to the available oxygen vacancies in the lattice. A room temperature electrical conductivity of 1.5נ10?5Scm?1 and an average transmittance >75% have been achieved. Hall measurements showed n-type conductivity with electron mobility value 0.95נ10?2cm2V?1s?1 and carrier concentration 2.7נ1019cm?3. Smoothness of the film surface observed through atomic force microscope measurements favors this material for gas sensing and opto-electronic device development.

A. Moses Ezhil Raj; C. Ravidhas; R. Ravishankar; A. Rathish Kumar; G. Selvan; M. Jayachandran; C. Sanjeeviraja

2009-01-01T23:59:59.000Z

476

Aboveground test of an advanced Li$_2$MoO$_4$ scintillating bolometer to search for neutrinoless double beta decay of $^{100}$Mo  

E-Print Network (OSTI)

Large lithium molybdate (Li$_2$MoO$_4$) crystal boules were produced by using the low thermal gradient Czochralski growth technique from deeply purified molybdenum. A small sample from one of the boules was preliminary characterized in terms of X-ray-induced and thermally-excited luminescence. A large cylindrical crystalline element (with a size of $\\oslash 40\\times40$ mm) was used to fabricate a scintillating bolometer, which was operated aboveground at $\\sim 15$ mK by using a pulse-tube cryostat housing a high-power dilution refrigerator. The excellent detector performance in terms of energy resolution and $\\alpha$ background suppression along with preliminary positive indications on the radiopurity of this material show the potentiality of Li$_2$MoO$_4$ scintillating bolometers for low-counting experiment to search for neutrinoless double beta decay of $^{100}$Mo.

T. B. Bekker; N. Coron; F. A. Danevich; V. Ya. Degoda; A. Giuliani; V. D. Grigorieva; N. V. Ivannikova; M. Mancuso; P. de Marcillac; I. M. Moroz; C. Nones; E. Olivieri; G. Pessina; D. V. Poda; V. N. Shlegel; V. I. Tretyak; M. Velazquez

2014-10-25T23:59:59.000Z

477

Aboveground test of an advanced Li$_2$MoO$_4$ scintillating bolometer to search for neutrinoless double beta decay of $^{100}$Mo  

E-Print Network (OSTI)

Large lithium molybdate (Li$_2$MoO$_4$) crystal boules were produced by using the low thermal gradient Czochralski growth technique from deeply purified molybdenum. A small sample from one of the boules was preliminary characterized in terms of X-ray-induced and thermally-excited luminescence. A large cylindrical crystalline element (with a size of $\\oslash 40\\times40$ mm) was used to fabricate a scintillating bolometer, which was operated aboveground at $\\sim 15$ mK by using a pulse-tube cryostat housing a high-power dilution refrigerator. The excellent detector performance in terms of energy resolution and $\\alpha$ background suppression along with preliminary positive indications on the radiopurity of this material show the potentiality of Li$_2$MoO$_4$ scintillating bolometers for low-counting experiment to search for neutrinoless double beta decay of $^{100}$Mo.

T. B. Bekker; N. Coron; F. A. Danevich; V. Ya. Degoda; A. Giuliani; V. D. Grigorieva; N. V. Ivannikova; M. Mancuso; P. de Marcillac; I. M. Moroz; C. Nones; E. Olivieri; G. Pessina; D. V. Poda; V. N. Shlegel; V. I. Tretyak; M. Velazquez

2014-12-17T23:59:59.000Z

478

First bolometric measurement of the two neutrino double beta decay of $^{100}$Mo with a ZnMoO$_4$ crystals array  

E-Print Network (OSTI)

The large statistics collected during the operation of a ZnMoO$_4$ array, for a total exposure of 1.3 kg $\\cdot$ day of $^{100}$Mo, allowed the first bolometric observation of the two neutrino double beta decay of $^{100}$Mo. The observed spectrum of each crystal was reconstructed taking into account the different background contributions due to environmental radioactivity and internal contamination. The analysis of coincidences between the crystals allowed the assignment of constraints to the intensity of the different background sources, resulting in a reconstruction of the measured spectrum down to an energy of $\\sim$300 keV. The half-life extracted from the data is T$_{1/2}^{2\

L. Cardani; L. Gironi; N. Ferreiro Iachellini; L. Pattavina; J. W. Beeman; F. Bellini; N. Casali; O. Cremonesi; I. Dafinei; S. Di Domizio; F. Ferroni; E. Galashov; C. Gotti; S. Nagorny; F. Orio; G. Pessina; G. Piperno; S. Pirro; E. Previtali; C. Rusconi; C. Tomei; M. Vignati

2014-04-30T23:59:59.000Z

479

Precipitation behavior of Ni-Cr-22 Fe-18 Mo (Hastelloy-X) and Ni-Cr-22 Co-12 Mo (Inconel-617) after isothermal aging  

SciTech Connect

The precipitation behavior of the nickel-base alloys Ni-Cr-22Fe-18Mo (Hastelloy-X) and Ni-Cr-22Co12Mo (Inconel-617) has been investigated as a function of aging temperature. Hastelloy-X shows that M/sub 6/C and TiN are primary precipitates and M/sub 12/C, A/sub 3/B/sub 2/ (approx. = Fe/sub 3/Mo/sub 2/), and M/sub 23/C/sub 6/ are secondary precipitates, while Inconel-617 also has M/sub 6/C and TiN as primary precipitates and M/sub 23/C/sub 6/, M/sub 12/C, and Ni/sub 3/AlTi as secondary precipitates. The characterization has been carried out by metallographic and transmission electron microscopy investigations and by x-ray examinations of electrochemical isolated precipitates.

Kirchhofer, H.; Nickel, H.; Schubert, F.

1984-07-01T23:59:59.000Z

480

Aboveground test of an advanced Li$_2$MoO$_4$ scintillating bolometer to search for neutrinoless double beta decay of $^{100}$Mo  

E-Print Network (OSTI)

Large lithium molybdate (Li$_2$MoO$_4$) crystal boules were produced by using the low thermal gradient Czochralski growth technique from deeply purified molybdenum. A small sample from one of the boules was preliminary characterized in terms of X-ray-induced and thermally-excited luminescence. A large cylindrical crystalline element (with a size of $\\oslash 40\\times40$ mm) was used to fabricate a scintillating bolometer, which was operated aboveground at $\\sim 15$ mK by using a pulse-tube cryostat housing a high-power dilution refrigerator. The excellent detector performance in terms of energy resolution and $\\alpha$ background suppression along with preliminary positive indications on the radiopurity of this material show the potentiality of Li$_2$MoO$_4$ scintillating bolometers for low-counting experiment to search for neutrinoless double beta decay of $^{100}$Mo.

Bekker, T B; Danevich, F A; Degoda, V Ya; Giuliani, A; Grigorieva, V D; Ivannikova, N V; Mancuso, M; de Marcillac, P; Moroz, I M; Nones, C; Olivieri, E; Pessina, G; Poda, D V; Shlegel, V N; Tretyak, V I; Velazquez, M

2014-01-01T23:59:59.000Z

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


481

Detailed characterization of Mo/Au TES microcalorimeters  

Science Journals Connector (OSTI)

We are optimizing Mo/Au transition-edge-sensor (TES) calorimeters to meet the specifications of NASAs Constellation-X mission. Our calorimeters have already demonstrated very good energy resolution of X rays (2.4 eV at 1.5 keV). We wish to further improve the energy resolution by reducing excess noise in the calorimeters. Development of a detailed model and understanding of the noise is instrumental to reaching this goal. Towards that end we employ a linear model that describes the response of a calorimeter to signal and various sources of noise. The model is based on detailed measurements of the parameters that affect the calorimeters performance such as current-voltage characteristics of the TES thermal conductance of our silicon-nitride membranes and inductance in the electronic circuit used to bias the TES. We determine the sharpness of the superconducting phase transition by fitting the model to the measured responsivity of the calorimeter. The model relates sources of noise such as phonon noise Johnson noise and hypothetical sources of excess noise to measurements of noise in the TES. Based on this analysis we find that the excess noise is consistent with frequency-independent voltage noise in the TES

Mark A. Lindeman; Regis P. Brekosky; Enectali Figueroa-Feliciano; Fred M. Finkbeiner; Mary Li; Caroline K. Stahle; Carl M. Stahle; Nilesh Tralshawala

2002-01-01T23:59:59.000Z

482

Electrochemical Testing of Ni-Cr-Mo-Gd Alloys  

SciTech Connect

The waste package site recommendation design specified a boron-containing stainless steel, Neutronit 976/978, for fabrication of the internal baskets that will be used as a corrosion-resistant neutron-absorbing material. Recent corrosion test results gave higher-than-expected corrosion rates for this material. The material callout for these components has been changed to a Ni-Cr-Mo-Gd alloy (ASTM-B 932-04, UNS N06464) that is being developed at the Idaho National Laboratory. This report discusses the results of initial corrosion testing of this material in simulated in-package environments that could contact the fuel baskets after breach of the waste package outer barrier. The corrosion test matrix was executed using the potentiodynamic and potentiostatic electrochemical test techniques. The alloy performance shows low rates of general corrosion after initial removal of a gadolinium-rich second phase that intersects the surface. The high halide-containing test solutions exhibited greater tendencies toward initiation of crevice corrosion.

T. E. Lister; R. E. Mizia; H. Tian

2005-10-01T23:59:59.000Z

483

Ring size and strain as a control of reaction selectivity: ethylene sulfide on Mo(110)  

SciTech Connect

The adsorption and reaction of sulfur-containing organic on single-crystal transition-metal surfaces form a subject of current to the authors and others. The primary focus of their work is an investigation of how thermodynamic properties of adsorbate molecules affect the mechanism(s) by which they react. To this end, they have studied the reactions of two saturated cyclic sulfides-trimethylene sulfide (c-C/sub 3/H/sub 6/S) and tetrahydrothiophene (c-C/sub 4/H/sub 8/S)--on Mo(110). On the basis of these studies they proposed that ring strain in the cyclic sulfide controls reaction selectivity on Mo(110). This work concerns the reactions of a third cyclic sulfide, ethylene sulfide (c-C/sub 2/H/sub 4/S), on Mo(110). The results presented here demonstrate that ring size as well as ring strain determines the reaction selectivity of cyclic sulfides on Mo(110).

Roberts, J.T.; Friend, C.M.

1987-12-09T23:59:59.000Z

484

Growth and crystal structure of binary molybdate CsFe(MoO{sub 4}){sub 2}  

SciTech Connect

CsFe(MoO{sub 4}){sub 2} single crystals have been grown by solution-melt crystallization with a charge-to-solvent ratio of 1: 3 (with Cs{sub 2}Mo{sub 3}O{sub 10} used as a solvent). The crystal structure of this compound has been refined by X-ray diffraction (X8 APEX automatic diffractometer, MoK{sub {alpha}} radiation, 356 F(hkl), R = 0.0178). The trigonal unit cell has the following parameters: a = b = 5.6051(2) A, c = 8.0118(4) A, V = 217.985(15) A{sup 3}, Z = 1, {rho}{sub calc} = 3.875 g/cm{sup 3}, and sp. gr. P3-barm1. The structure is composed of alternating layers of FeO{sub 6} octahedra (with MoO{sub 4} tetrahedra attached by sharing vertices) and CsO{sub 12} icosahedra.

Bazarov, B. G., E-mail: jbaz@binm.bscnet.ru; Namsaraeva, T. V. [Russian Academy of Sciences, Baikal Institute of Nature Management, Siberian Branch (Russian Federation); Klevtsova, R. F., E-mail: klev@che.nsk.su; Anshits, A. G. [Russian Academy of Sciences, Institute of Inorganic Chemistry, Siberian Branch (Russian Federation); Vereshchagina, T. A. [Russian Academy of Sciences, Institute of Chemistry and Chemical Technology, Siberian Branch (Russian Federation); Glinskaya, L. A. [Russian Academy of Sciences, Institute of Inorganic Chemistry, Siberian Branch (Russian Federation); Fedorov, K. N.; Bazarova, Zh. G. [Russian Academy of Sciences, Baikal Institute of Nature Management, Siberian Branch (Russian Federation)

2010-07-15T23:59:59.000Z

485

Cr17Ni14Mo3 Powder Laser Cladding on 45Steel Substrate  

Science Journals Connector (OSTI)

The relationship between laser power, scan-rate, thickness of pre-placed powder particles, overlap, preheating and laser cladding coating quality was analyzed. Laser cladding of Cr17Ni14Mo3 stainless steel powder...

Sun Huilai; Lin Shuzhong; Zhao Fangfang; Qi Xiangyang

2010-01-01T23:59:59.000Z

486

Electronic structure of alkaline metal hydrides according to MO LCAO-SCF-CNDO cluster calculations  

Science Journals Connector (OSTI)

This paper presents the results of a quantum chemical study of compounds MH (M = Li, Na, K, Rb, and Cs) in a cluster approximation. The calculations were performed by the MO LCAO-SCF- ... model systems of high-te...

E. A. Zharikova; A. I. Ermakov; R. P. Ozerov

487

Phase Development in a U-7 wt.% Mo vs. Al-7 wt.% Ge Diffusion Couple  

SciTech Connect

Fuel development for the Reduced Enrichment for Research and Test Reactors (RERTR) program has demonstrated that U-Mo alloys in contact with Al develop interaction regions with phases that have poor irradiation behavior. The addition of Si to the Al has been considered with positive results. Compositional modification to replace Si with Ge is now under evaluation to attempt to further improve irradiation behavior. In this study, the microstructural and phase development of a diffusion couple of U-7 wt.% Mo in contact with Al-7 wt.% Ge was examined by transmission electron microscopy, scanning electron microscopy and energy dispersive spectroscopy. The interdiffusion zone developed a microstructure that included the cubic-UGe3 phase and amorphous phases. The UGe3 phase was observed with and without Mo and Al solid solutioning developing a (U,Mo)(Al,Ge)3 phase.

E. Perez; D.D. Keiser, Jr.; Y.H. Sohn

2013-10-01T23:59:59.000Z

488

AB INITIO Modeling of Thermomechanical Properties of Mo-Based Alloys for Fossil Energy Conversion  

SciTech Connect

In this final scientific/technical report covering the period of 3.5 years started on July 1, 2011, we report the accomplishments on the study of thermo-mechanical properties of Mo-based intermetallic compounds under NETL support. These include computational method development, physical properties investigation of Mo-based compounds and alloys. The main focus is on the mechanical and thermo mechanical properties at high temperature since these are the most crucial properties for their potential applications. In particular, recent development of applying ab initio molecular dynamic (AIMD) simulations to the T1 (Mo{sub 5}Si{sub 3}) and T2 (Mo{sub 5}SiB{sub 2}) phases are highlighted for alloy design in further improving their properties.

Ching, Wai-Yim

2013-12-31T23:59:59.000Z

489

Mo{sub 5}Si{sub 3} single crystals: Physical properties and mechanical behavior  

SciTech Connect

The materials processing, physical properties and mechanical behavior of an ultra-high temperature structural silicide, Mo{sub 5}Si{sub 3}, have been studied. High purity single crystals of Mo{sub 5}Si{sub 3} have been synthesized by both optical floating zone and Czochralski methods. The thermal and elastic properties of the MO{sub 5}Si{sub 3} single crystals were experimentally measured. Results show that Mo{sub 5}Si{sub 3} has significant thermal expansion anisotropy along the a and c directions with {alpha}{sub c}/{alpha}{sub a} = 2.2. Single crystal elastic moduli of Mo{sub 5}Si{sub 3} indicate that it has less elastic anisotropy and lower shear moduli than transition metal disilicides. Tensile stresses of up to 1.8 GPa can develop at grain boundaries after cooling from the melting point due to the thermal expansion mismatch in Mo{sub 5}Si{sub 3}, causing grain boundary cracking during processing of polycrystals. Room temperature Vickers indentation tests on (100) and (001) planes have been performed with different indenter diagonal orientations. The orientation dependence of hardness and fracture toughness of Mo{sub 5}Si{sub 3} single crystals have been obtained. The corresponding deformation and fracture modes have been revealed by microscopy studies. A comparison of Mo{sub 5}Si{sub 3} with other high temperature structural silicides, e.g., C11{sub b} and C40 transition metal disilicides, is discussed.

Chu, F.; Thoma, D.J.; McClellan, K.J.; Peralta, P.

1998-12-01T23:59:59.000Z

490

Magnesium in the atmosphere of the planet HD209458b: Observations of the thermosphere-exosphere transition region  

E-Print Network (OSTI)

We report new near ultraviolet HST/STIS observations of atmospheric absorptions during the planetary transit of HD209458b. We detect absorption in atomic magnesium (MgI), while no signal has been detected in the lines of singly ionized magnesium (MgII). We measure the MgI atmospheric absorption to be 6.2+/-2.9% in the velocity range from -62 to -19 km/s. The detection of atomic magnesium in the planetary upper atmosphere at a distance of several planetary radii gives a first view into the transition region between the thermosphere and the exobase, where atmospheric escape takes place. We estimate the electronic densities needed to compensate for the photo-ionization by dielectronic recombination of Mg+ to be in the range of 10^8-10^9 cm^{-3}. Our finding is in excellent agreement with model predictions at altitudes of several planetary radii. We observe MgI atoms escaping the planet, with a maximum radial velocity (in the stellar rest frame) of -60 km/s. Because magnesium is much heavier than hydrogen, the es...

Vidal-Madjar, A; Bourrier, V; Dsert, J -M; Ballester, G; Etangs, A Lecavelier des; Sing, D K; Ehrenreich, D; Ferlet, R; Hbrard, G; McConnell, J C

2013-01-01T23:59:59.000Z

491

Density Functional Theory Simulations Predict New Materials for Magnesium-Ion Batteries (Fact Sheet), NREL Highlights, Science  

SciTech Connect

Multivalence is identified in the light element, B, through structure morphology. Boron sheets exhibit highly versatile valence, and the layered boron materials may hold the promise of a high-energy-density magnesium-ion battery. Practically, boron is superior to previously known multivalence materials, especially transition metal compounds, which are heavy, expensive, and often not benign. Based on density functional theory simulations, researchers at the National Renewable Energy Laboratory (NREL) have predicted a series of stable magnesium borides, MgB{sub x}, with a broad range of stoichiometries, 2 < x < 16, by removing magnesium atoms from MgB{sub 2}. The layered boron structures are preserved through an in-plane topological transformation between the hexagonal lattice domains and the triangular domains. The process can be reversibly switched as the charge transfer changes with Mg insertion/extraction. The mechanism of such a charge-driven transformation originates from the versatile valence state of boron in its planar form. The discovery of these new physical phenomena suggests the design of a high-capacity magnesium-boron battery with theoretical energy density 876 mAh/g and 1550 Wh/L.

Not Available

2011-10-01T23:59:59.000Z

492

Neutron and X-ray diffraction and empirical potential structure refinement modelling of magnesium stabilised amorphous calcium  

E-Print Network (OSTI)

Neutron and X-ray diffraction and empirical potential structure refinement modelling of magnesium online xxxx Keywords: Amorphous calcium carbonate; EPSR modelling; Neutron diffraction; X-ray diffraction Amorphous calcium carbonate (ACC) plays a key role in biomineralisation processes in sea organisms. Neutron

Benning, Liane G.

493

MoS{sub 2} nanotube exfoliation as new synthesis pathway to molybdenum blue  

SciTech Connect

Graphical abstract: . Display Omitted Highlights: ? New synthesis approach to obtaining molybdenum blue via exfoliated MoS{sub 2} nanotubes. ? Material is prone to self assembly and is stable in high vacuum. ? Molecules are as small as 2 nm and their clusters are up to tens of nanometers. ? Change in absorption and oxidation states from the precursor MoS{sub 2}. -- Abstract: Molybdenum blue-type materials are usually obtained by partially reducing Mo{sup VI+} in acidic solutions, while in the presented method it is formed in ethanol solution of exfoliated MoS{sub 2} nanotubes, where the MoS{sub 2} flakes are the preferential location for their growth. Material was investigated by means of scanning electron and atomic force microscopy, showing the structure and self assembly, while also confirming that it is stable in high vacuum with molecules as small as 1.6 nm and the agglomerates of few tens of nanometres. The ultravioletvisible and photoelectron spectrometry show the change in absorption properties and oxidation states from MoS{sub 2} structure to molybdenum blue, while the presence of sulphur suggests that this is a new type of molybdenum blue material.

Visic, B., E-mail: bojana.visic@ijs.si [Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana (Slovenia); Gunde, M. Klanjsek [National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana (Slovenia)] [National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana (Slovenia); Kovac, J.; Iskra, I. [Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana (Slovenia)] [Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana (Slovenia); Jelenc, J.; Remskar, M. [Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana (Slovenia) [Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana (Slovenia); Centre of Excellence Namaste, Jamova cesta 39, SI-1000 Ljubljana (Slovenia)

2013-02-15T23:59:59.000Z

494

Soft zone formation in dissimilar welds between two Cr-Mo steels  

SciTech Connect

Two dissimilar weldments between 9Cr-1Mo and 2.25Cr-1Mo ferritic steels have been characterized for their microstructural stability during various postweld heat treatments (PWHTs). The samples for the investigation were extracted from bead-on-plate weldments made by depositing 2.25Cr-1Mo weld metal on 9Cr-1Mo base plate and vice versa. Subsequent application of PWHT resulted in the formation of a soft zone in the low Cr ferritic steel weld or base plate. A carbide-rich hard zone, adjoining the soft zone, was also detected in the high Cr side of the weldment. Unmixed zones in the weld metal provided additional soft and hard zones in the weld metals. The migration of carbon from low-Cr steel to high-Cr steel, driven by the carbon activity gradient, has been shown to be responsible for the formation of soft and hard zones. A carbon activity diagram for 2.25Cr-1Mo/9Cr-1Mo weldments has been proposed to aid in the selection of welding consumables for reducing or preventing the soft zone formation.

Albert, S.K.; Gill, T.P.S.; Tyagi, A.K.; Mannan, S.L.; Rodriguez, P. [Indira Gandhi Centre for Atomic Research, Kalpakkam (India); Kulkarni, S.D. [Indian Inst. of Tech., Bombay (India)

1997-03-01T23:59:59.000Z

495

Magnesium Projects  

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

bounds MSF upper bounds Strain Amplitude Cycles to Failure Mississippi State U, Brian Jordan etal Multi-stage Fatigue Model Prediction compared with experimental results for...

496

Solidification, growth mechanisms, and associated properties of Al-Si and magnesium lightweight casting alloys  

SciTech Connect

Continually rising energy prices have inspired increased interest in weight reduction in the automotive and aerospace industries, opening the door for the widespread use and development of lightweight structural materials. Chief among these materials are cast Al-Si and magnesium-based alloys. Utilization of Al-Si alloys depends on obtaining a modified fibrous microstructure in lieu of the intrinsic flake structure, a process which is incompletely understood. The local solidification conditions, mechanisms, and tensile properties associated with the flake to fiber growth mode transition in Al-Si eutectic alloys are investigated here using bridgman type gradient-zone directional solidification. Resulting microstructures are examined through quantitative image analysis of two-dimensional sections and observation of deep-etched sections showing three-dimensional microstructural features. The transition was found to occur in two stages: an initial stage dominated by in-plane plate breakup and rod formation within the plane of the plate, and a second stage where the onset of out-of-plane silicon rod growth leads to the formation of an irregular fibrous structure. Several microstructural parameters were investigated in an attempt to quantify this transition, and it was found that the particle aspect ratio is effective in objectively identifying the onset and completion velocity of the flake to fiber transition. The appearance of intricate out-of-plane silicon instability formations was investigated by adapting a perturbed-interface stability analysis to the Al-Si system. Measurements of silicon equilibrium shape particles provided an estimate of the anisotropy of the solid Si/liquid Al-Si system and incorporation of this silicon anisotropy into the model was found to improve prediction of the instability length scale. Magnesium alloys share many of the benefits of Al-Si alloys, with the added benefit of a 1/3 lower density and increased machinability. Magnesium castings often contain additions of heavier elements, such as zinc, zirconium, and rare earth elements, which significantly improve high temperature performance. However, additions of these elements can lead to macrosegregational effects in castings, which are detectable by radiographic scans. The effect of these flow-line indications on alloy mechanical properties is not well quantified. An examination of these flow-line indications and their effects on mechanical properties in three magnesium-based casting alloys was performed here in order to determine the best practice for dealing with affected castings. Preliminary results suggest the flow-lines do not measurably impact bulk material properties. Three additional methods of characterizing three-dimensional material structures are also presented: a minimum spanning tree analysis is utilized to quantify local structure in Cu-Zr liquid phase simulations obtained from molecular dynamics; the radial distribution function is applied to directionally solidified Al-Si structures in an attempt to extract local spacing data; and the critical diameter measurement is also defined and applied to irregular eutectic Al-Si structures.

Hosch, Timothy

2010-05-16T23:59:59.000Z

497

Overview of DOE'S programs on aluminum and magnesium for automotive application  

SciTech Connect

The U.S. Department of Energy will present an update and review of its programs in aluminum and magnesium for automotive and heavy-duty vehicle applications. While the main programs focused on vehicle materials are in the Office of Transportation Technologies, contributing efforts will be described in the DOE Office of Industrial Technologies and the DOE Office of Energy Research. The presentation will discuss materials for body/chassis and power train, and will highlight the considerable synergy among the efforts. The bulk of the effort is on castings, sheet, and alloys with a smaller focus on metal matrix composites. Cost reduction and energy savings are the overriding themes of the programs.

Carpenter, J.; Diamond, S.; Dillich, S.; Fitzsimmons, T.; Milliken, J.; Sklad, P.

1999-02-28T23:59:59.000Z

498

Multiphoton Ionization of Magnesium in a Ti-Sapphire laser field  

E-Print Network (OSTI)

In this paper we report the theoretical results obtained for partial ionization yields and the above-threshold ionization (ATI) spectra of Magnesium in a Ti:sapphire laser field (804 nm) in the range of short pulse duration (20-120 fs). Ionization yield, with linearly polarized light for a 120 fs laser pulse, is obtained as a function of the peak intensity motivated by recent experimental data \\cite{gillen:2001}. For this, we have solved the time-dependent Schr\\"{o}dinger equation nonperturbatively on a basis of discretized states obtained with two different methods; one with the two-electron wavefunction relaxed at the boundaries, giving a quadratic discretized basis and the other with the two-electron wavefunction expanded in terms of Mg$^+$-orbitals plus one free electron allowing the handling of multiple continua (open channels). Results, obtained with the two methods, are compared and advantages and disadvantages of the open-channel method are discussed.

Nikolopoulos, L A A; Lambropoulos, P; 10.1140/epjd/e2003-00265-7

2013-01-01T23:59:59.000Z

499

The effect of magnesium added at C{sub 60}/Rubrene heterointerfaces  

SciTech Connect

This study examines the effect of adding magnesium (Mg) at C{sub 60}/rubrene heterointerfaces by using synchrotron-radiation photoemission spectroscopy. The heterointerface was obtained by depositing C{sub 60} on a 4- Mg/rubrene surface. The photoemission spectra showed that the added Mg preferentially interacts with and transfers negative charges to C{sub 60}. The interfacial dipole potential was significantly enlarged, as was the separation between the lowest unoccupied molecular orbital of C{sub 60} and the highest occupied molecular orbital of rubrene. The results demonstrate that the addition of Mg should be an effective method for improving the efficiency of light- and current-generating devices.

Cheng, Chiu-Ping; Lee, Cheng-Wei; Chu, Yu-Ya [Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan (China)] [Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan (China); Wei, Ching-Hsuan [Department of Material Science, National Chiao-Tung University, Hsinchu 30076, Taiwan (China)] [Department of Material Science, National Chiao-Tung University, Hsinchu 30076, Taiwan (China); Pi, Tun-Wen [National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)] [National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)

2013-12-28T23:59:59.000Z

500

Punchless Drawing of Magnesium Alloy Sheet under Cold Condition and its Computation  

SciTech Connect

The punchless drawing with Maslennikov's technique was applied to the circular cup drawing of magnesium alloy AZ31B sheet under cold condition. The elastic rubber ring was used instead of the 'hard' punch, where the compressed ring dragged the sheet inward the die cavity. Attainable circumferential strain of the blank was increased by this technique with repetitive drawing operation. Thickness of the rubber pad affected little the attainable strain. The shape appearance became better when a harder rubber was used. The cup forming by single drawing operation was also tested using a small die shoulder radius. The LDR of 1.250 was obtained with the straight cup wall. Further, the computation of the punchless drawing was also conducted for the single drawing operation. The computed deformation pattern was well consistent with the corresponding experimental result.

Yamashita, Minoru [Center for Advanced Die Engineering and Technology, Gifu University, Yanagido Gifu, 501-1193 (Japan); Hattori, Toshio [Department of Mechanical and Systems Engineering, Gifu University, ditto. (Japan); Sato, Joji [Research Institute for Machinery and Materials, Gifu Prefectural Government, 1288 Oze Seki, 501-3265 (Japan)

2011-01-17T23:59:59.000Z