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Note: This page contains sample records for the topic "foam metal casting" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Manufacturers Saving with Lost Foam Metal Casting | Department of Energy  

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

Manufacturers Saving with Lost Foam Metal Casting Manufacturers Saving with Lost Foam Metal Casting Manufacturers Saving with Lost Foam Metal Casting December 18, 2009 - 2:43pm Addthis Eric Barendsen Energy Technology Program Specialist, Office of Energy Efficiency and Renewable Energy What are the key facts? Metal casting was identified as one of the top 10 energy users in manufacturing. The technology represents a 20- to 25-percent reduction in production costs and uses 7 percent fewer materials than traditional processes. One example of this technology is being used by General Motors to make lightweight engine blocks for the fuel-efficient vehicles they manufacture. A government-funded effort to support development of foam metal casting helped reduce an estimated 9.4 million tons of solid waste between 1994 and 2005, which saved industry an estimated 3 trillion Btu.

2

Advanced Lost Foam Casting Technology  

SciTech Connect

This report describes the research done under the six tasks to improve the process and make it more functional in an industrial environment. Task 1: Pattern Pyrolysis Products and Pattern Properties Task 2: Coating Quality Control Task 3: Fill and Solidification Code Task 4: Alternate Pattern Materials Task 5: Casting Distortion Task 6: Technology Transfer

Charles E. Bates; Harry E. Littleton; Don Askeland; Taras Molibog; Jason Hopper; Ben Vatankhah

2000-11-30T23:59:59.000Z

3

Complex foamed aluminum parts as permanent cores in aluminum castings  

SciTech Connect

The feasibility of complex shaped aluminum foam parts as permanent cores in aluminum castings has been investigated. The foamed samples were prepared by injection of the foam into sand molds. It turned out that sound castings can be produced if the foam core is properly preheated and/or surface treated before casting. The effect of the foam core on the performance of the casting was evaluated by in compression testing and by measuring structural damping. The gain in the related properties turned out to be much higher than the weight increase of the casting due to the presence of the core. The weight increase may be partially offset through a reduction of the wall-thickness of the shell.

Simancik, F. [Inst. of Materials and Machine Mechanics, Bratislava (Slovakia); Schoerghuber, F. [Illichmann GmbH, Altmuenster (Austria)

1998-12-31T23:59:59.000Z

4

Clean Metal Casting  

SciTech Connect

The objective of this project is to develop a technology for clean metal processing that is capable of consistently providing a metal cleanliness level that is fit for a given application. The program has five tasks: Development of melt cleanliness assessment technology, development of melt contamination avoidance technology, development of high temperature phase separation technology, establishment of a correlation between the level of melt cleanliness and as cast mechanical properties, and transfer of technology to the industrial sector. Within the context of the first task, WPI has developed a standardized Reduced Pressure Test that has been endorsed by AFS as a recommended practice. In addition, within the context of task1, WPI has developed a melt cleanliness sensor based on the principles of electromagnetic separation. An industrial partner is commercializing the sensor. Within the context of the second task, WPI has developed environmentally friendly fluxes that do not contain fluorine. Within the context of the third task, WPI modeled the process of rotary degassing and verified the model predictions with experimental data. This model may be used to optimize the performance of industrial rotary degassers. Within the context of the fourth task, WPI has correlated the level of melt cleanliness at various foundries, including a sand casting foundry, a permanent mold casting foundry, and a die casting foundry, to the casting process and the resultant mechanical properties. This is useful in tailoring the melt cleansing operations at foundries to the particular casting process and the desired properties of cast components.

Makhlouf M. Makhlouf; Diran Apelian

2002-02-05T23:59:59.000Z

5

Metal-doped organic foam  

DOE Patents (OSTI)

Organic foams having a low density and very small cell size and method for producing same in either a metal-loaded or unloaded (nonmetal loaded) form are described. Metal-doped foams are produced by soaking a polymer gel in an aqueous solution of desired metal salt, soaking the gel successively in a solvent series of decreasing polarity to remove water from the gel and replace it with a solvent of lower polarity with each successive solvent in the series being miscible with the solvents on each side and being saturated with the desired metal salt, and removing the last of the solvents from the gel to produce the desired metal-doped foam having desired density cell size, and metal loading. The unloaded or metal-doped foams can be utilized in a variety of applications requiring low density, small cell size foam. For example, rubidium-doped foam made in accordance with the invention has utility in special applications, such as in x-ray lasers.

Rinde, James A. (Livermore, CA)

1982-01-01T23:59:59.000Z

6

Method of casting pitch based foam  

DOE Patents (OSTI)

A process for producing molded pitch based foam is disclosed which minimizes cracking. The process includes forming a viscous pitch foam in a container, and then transferring the viscous pitch foam from the container into a mold. The viscous pitch foam in the mold is hardened to provide a carbon foam having a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts.

Klett, James W. (Knoxville, TN)

2002-01-01T23:59:59.000Z

7

ITP Metal Casting: A Vision for the U.S. Metal Casting Industry...  

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

mcvision.pdf More Documents & Publications ITP Metal Casting: Metalcasting Industry Technology Roadmap ITP Metal Casting: Implementation of Metal Casting Best Practices ITP...

8

Final Technical Report Quantification and Standardization of Pattern Properties for the Control of the Lost Foam Casting Process  

SciTech Connect

This project takes a fresh look at the ''white side'' of the lost foam casting process. We have developed the gel front hypothesis for foam pyrolysis behavior and the magnetic metal pump method for controlling lost foam casting metal fill event. The subject of this report is work done in the improvement of the Lost Foam Casting Process. The original objective of this project was to improve the control of metal fill by understanding the influence of foam pattern and coating properties on the metal fill event. Relevant pattern properties could then be controlled, providing control of the metal fill event. One of the original premises of this project was that the process of metal fill was relatively well understood. Considerable previous work had been done to develop fluid mechanical and heat transfer models of the process. If we could just incorporate measured pattern properties into these models we would be able predict accurately the metal fill event. As we began to study the pyrolysis behavior of EPS during the metal fill event, we discovered that the chemical nature of this event had been completely overlooked in previous research. Styrene is the most prevalent breakdown product of EPS pyrolysis and it is a solvent for polystyrene. Much of the styrene generated by foam pyrolysis diffuses into intact foam, producing a molten gel of mechanically entangled polystyrene molecules. Much of the work of our project has centered on validation of this concept and producing a qualitative model of the behavior of EPS foam undergoing pyrolysis in a confined environment. A conclusion of this report is that styrene dissolution in EPS is a key phenomenon in the pyrolysis process and deserves considerable further study. While it is possible to continue to model the metal fill event parametrically using empirical data, we recommend that work be undertaken by qualified researchers to directly characterize and quantify this phenomenon for the benefit of modelers, researchers, and workers in the field. Another original premise of this project was that foam pattern and coating properties could be used to efficiently control metal fill. After studying the structure of EPS foam in detail for the period of this contract, we have come to the conclusion that EPS foam has an inherent variability at a scale that influences metal fill behavior. This does not allow for the detailed fine control of the process that we originally envisioned. We therefore have sought other methods for the control of the metal fill event. Of those, we now believe that the magnetic metal pump shows the most promise. We have conducted two casting trials using this method and preliminary results are very encouraging. A conclusion of our report is that, while every effort should continue to be made to produce uniform foam and coatings, the use of the magnetic metal pump should be encouraged and closed loop control mechanisms should be developed for this pouring method.

Ronald Michaels

2005-09-30T23:59:59.000Z

9

Energy Saving Melting and Revert Reduction Technology (Energy SMARRT): Manufacturing Advanced Engineered Components Using Lost Foam Casting Technology  

SciTech Connect

This project was a subtask of Energy Saving Melting and Revert Reduction Technology (?¢????Energy SMARRT?¢???) Program. Through this project, technologies, such as computer modeling, pattern quality control, casting quality control and marketing tools, were developed to advance the Lost Foam Casting process application and provide greater energy savings. These technologies have improved (1) production efficiency, (2) mechanical properties, and (3) marketability of lost foam castings. All three reduce energy consumption in the metals casting industry. This report summarizes the work done on all tasks in the period of January 1, 2004 through June 30, 2011. Current (2011) annual energy saving estimates based on commercial introduction in 2011 and a market penetration of 97% by 2020 is 5.02 trillion BTU?¢????s/year and 6.46 trillion BTU?¢????s/year with 100% market penetration by 2023. Along with these energy savings, reduction of scrap and improvement in casting yield will result in a reduction of the environmental emissions associated with the melting and pouring of the metal which will be saved as a result of this technology. The average annual estimate of CO2 reduction per year through 2020 is 0.03 Million Metric Tons of Carbon Equivalent (MM TCE).

Harry Littleton; John Griffin

2011-07-31T23:59:59.000Z

10

Eddy current characterization of metal foams  

SciTech Connect

Cellular materials are characterized by their relative density, pore shape and orientation, the average cell size, and the degree of pore interconnectivity which all depend upon the method and conditions used for processing. This has created an interest in non-invasive sensor techniques to characterize the foam structure. Multifrequency electrical impedance measurements were performed using an eddy current technique on open cell aluminum foam with systematically varied relative densities and pore sizes. The impedance was dominated at all frequencies by the amount of metal contained within a probed volume of foam and the tortuosity of the current path. At low frequency, the impedance data were found to be relatively insensitive to pore size variations enabling an independent measure of the relative density. At higher frequency, the data indicated a strong dependence on the cell size.

Dharmasena, K.P.; Wadley, H.N.G. [Univ. of Virginia, Charlottesville, VA (United States). Intelligent Processing of Materials Lab.

1998-12-31T23:59:59.000Z

11

Modeling of Sandwich Sheets with Metallic Foam  

SciTech Connect

World-wide vehicles safety experts agree that significant further reductions in fatalities and injuries can be achieved as a result of the use of new lightweight and energy absorbing materials. On this work, the authors present the development and evaluation of an innovative system able to perform reliable panels of sandwich sheets with metallic foam cores for industrial applications. The mathematical model used to describe the behavior of sandwich shells with metal cores foam is presented and some numerical examples are presented. In order to validate those results mechanical experiments are carried out. Using the crushable foam constitutive model, available on ABAQUS, a set of different mechanical tests were simulated. There are two variants of this model available on ABAQUS: the volumetric hardening model and the isotropic hardening model. As a first approximation we chose the isotropic hardening variant. The isotropic hardening model available uses a yield surface that is an ellipse centered at the origin in the p-q stress plane. Based on this constitutive model for the foam, numerical simulations of the tensile and bulge test will be conducted. The numerical results will be validated using the data obtained from the experimental results.

Mata, H.; Jorge, R. Natal; Fernandes, A. A.; Parente, M. P. L. [IDMEC-FEUP, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias 4200-465 Porto (Portugal); Santos, A. [INEGI, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias 4200-465 Porto (Portugal); Valente, R. A. F. [Universidade de Aveiro, Campus Universitario de Santiago 3810-193 Aveiro (Portugal)

2011-08-22T23:59:59.000Z

12

ITP Metal Casting: Corrosion Testing Practices - High Alloy Corrosion...  

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

Metal Casting: Corrosion Testing Practices - High Alloy Corrosion Program ITP Metal Casting: Corrosion Testing Practices - High Alloy Corrosion Program lehighfs.pdf More Documents...

13

ITP Metal Casting: Advanced Melting Technologies: Energy Saving...  

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

Advanced Melting Technologies: Energy Saving Concepts and Opportunities for the Metal Casting Industry ITP Metal Casting: Advanced Melting Technologies: Energy Saving Concepts and...

14

Reliability Tools for Resonance Inspection of Light Metal Castings...  

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

for Light Metal Castings FY 2009 Progress Report for Lightweighting Materials - 10. Nondestructive Evaluation NDE 701: Enhanced Resonance Inspection for Light Metal Castings...

15

NDE 701: Enhanced Resonance Inspection for Light Metal Castings...  

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

NDE 701: Enhanced Resonance Inspection for Light Metal Castings NDE 701: Enhanced Resonance Inspection for Light Metal Castings Presentation from the U.S. DOE Office of Vehicle...

16

An Investigation and Characterization of Metal Foam Filled Double-Pipe Heat Exchangers.  

E-Print Network (OSTI)

??The effect of using metal foams in double-pipe heat exchangers is investigated in this work. The advantages and drawbacks of using metal foams in these (more)

Chen, Xi

2014-01-01T23:59:59.000Z

17

Energy-Saving Melting and Revert Reduction Technology (E-SMARRT): Lost Foam Thin Wall - Feasibility of Producing Lost Foam Castings in Aluminum and Magnesium Based Alloys  

SciTech Connect

With the increased emphasis on vehicle weight reduction, production of near-net shape components by lost foam casting will make significant inroad into the next-generation of engineering component designs. The lost foam casting process is a cost effective method for producing complex castings using an expandable polystyrene pattern and un-bonded sand. The use of un-bonded molding media in the lost foam process will impose less constraint on the solidifying casting, making hot tearing less prevalent. This is especially true in Al-Mg and Al-Cu alloy systems that are prone to hot tearing when poured in rigid molds partially due to their long freezing range. Some of the unique advantages of using the lost foam casting process are closer dimensional tolerance, higher casting yield, and the elimination of sand cores and binders. Most of the aluminum alloys poured using the lost foam process are based on the Al-Si system. Very limited research work has been performed with Al-Mg and Al-Cu type alloys. With the increased emphasis on vehicle weight reduction, and given the high-strength-to-weight-ratio of magnesium, significant weight savings can be achieved by casting thin-wall (? 3 mm) engineering components from both aluminum- and magnesium-base alloys.

Fasoyinu, Yemi [CanmetMATERIALS] [CanmetMATERIALS; Griffin, John A. [University of Alabama - Birmingham] [University of Alabama - Birmingham

2014-03-31T23:59:59.000Z

18

Effect of flask vibration time on casting integrity, Surface Penetration and Coating Inclusion in lost foam casting of Al-Si Alloy  

SciTech Connect

The paper presents the result of an experimental investigation conducted on medium aluminum silicon alloy casting- LM6, using no-vacuum assisted lost foam casting process. The study is directed for establishing the relationship between the flask vibrations times developed for molded sample on the casting integrity, surface penetration and coating inclusion defects of the casting. Four different flask vibration times namely 180, 120, 90 and 60 sec. were investigated. The casting integrity was investigated in terms of fulfilling in all portions and edges. The surface penetration was measured using optical microscope whilst image analyzer was used to quantify the percentage of coating inclusion in the casting. The results show that vibration time has significant influence on the fulfilling as well as the internal integrity of the lost foam casting. It was found that the lower vibration time produced comparatively sound casing.

Karimian, Majid [Dept. of Materials Engineering, Dept. of Mechanical Engineering, Khomeinishahr branch, Islamic Azad University-(Khomeinishahr- Isfahan) (Iran, Islamic Republic of); Idris, M. H. [Dept. of Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, University Technology Malaysia, Johor Bauru (Malaysia); Ourdjini, A.; Muthu, Kali [Dept. of Materials Engineering, Khomeinishahr branch, Islamic Azad University-(Khomeinishahr- Isfahan) (Iran, Islamic Republic of)

2011-01-17T23:59:59.000Z

19

Preparation of actinide metal targets using special casting techniques  

Science Journals Connector (OSTI)

Various casting techniques and mold design have been evaluated at Rocky Flats for preparing actinide metal targets. A tilt-pour casting technique is used for targets > 0.040 in. thick, and an injection casting technique has been developed for targets neptunium, and uranium metal ingots and disks ranging from 0.0050.600 in. thickness have been cast.

W.V. Conner

1972-01-01T23:59:59.000Z

20

ITP Metal Casting: Implementation of Metal Casting Best Practices  

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

The project examined cases where metal casters had implemented ITP research results and detailed the benefits they received due to that implementation.

Note: This page contains sample records for the topic "foam metal casting" 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

Pyrophoric metal-carbon foam composites and methods of making the same  

DOE Patents (OSTI)

A method for creating a pyrophoric material according to one embodiment includes thermally activating a carbon foam for creating micropores therein; contacting the activated carbon foam with a liquid solution comprising a metal salt for depositing metal ions in the carbon foam; and reducing the metal ions in the foam to metal particles. A pyrophoric material in yet another embodiment includes a pyrophoric metal-carbon foam composite comprising a carbon foam having micropores and mesopores and a surface area of greater than or equal to about 2000 m.sup.2/g, and metal particles in the pores of the carbon foam. Additional methods and materials are also disclosed.

Gash, Alexander E. (Brentwood, CA); Satcher, Jr., Joe H. (Patterson, CA); Simpson, Randall L. (Livermore, CA); Baumann, Theodore F. (Discovery Bay, CA); Worsley, Marcus A. (Belmont, CA)

2012-05-08T23:59:59.000Z

22

Method of making metal-doped organic foam products  

DOE Patents (OSTI)

Organic foams having a low density and very small cell size and method for roducing same in either a metal-loaded or unloaded (nonmetal loaded) form are described. Metal-doped foams are produced by soaking a polymer gel in an aqueous solution of desired metal salt, soaking the gel successively in a solvent series of decreasing polarity to remove water from the gel and replace it with a solvent of lower polarity with each successive solvent in the series being miscible with the solvents on each side and being saturated with the desired metal salt, and removing the last of the solvents from the gel to produce the desired metal-doped foam having desired density cell size, and metal loading. The unloaded or metal-doped foams can be utilized in a variety of applications requiring low density, small cell size foam. For example, rubidium-doped foam made in accordance with the invention has utility in special applications, such as in x-ray lasers.

Rinde, James A. (Livermore, CA)

1981-01-01T23:59:59.000Z

23

Parameters of construction for applications of metal foams  

SciTech Connect

Foamed parts must be bonded to other components in order to be able to use them. In practice, it is not possible to limit applications to merely foaming out parts, whereby the framework construction can receive the connection elements (links). Therefore, the assembly of foamed parts requires to search for suitable detachable joint connections and to quantify the durability of them. To reach this goal, the connection pull-out strength is to be determined for the widest variety of links. Because of the required higher processing accuracies, the thermal behavior of components is becoming more and more important for practical applications. This also applies to sandwich composite materials with metal foam. Of particular interest is the interrelationship between thermal deformations and the structure of the sandwich plate. Factors such as cover sheet material and thickness, plate thickness and foam density play an important roll in this relationship.

Neugebauer, R.; Hipke, T. [Fraunhofer Inst. for Machine Tools and Forming Technologies, Chemnitz (Germany)

1998-12-31T23:59:59.000Z

24

Mechanical Properties of a Metal Powder-Loaded Polyurethane Foam  

SciTech Connect

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

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

1999-04-01T23:59:59.000Z

25

Volatile Species Retention During Metallic Fuel Casting  

SciTech Connect

Metallic nuclear fuels are candidate transmutation fuel forms for advanced fuel cycles. Through the operation of the Experimental Breeder Reactor II metallic nuclear fuels have been shown to be robust and easily manufactured. However, concerns have been raised concerning loss of americium during the casting process because of its high vapor pressure. In order to address these concerns a gaseous diffusion model was developed and a series of experiments using both manganese and samarium as surrogates for americium were conducted. The modeling results showed that volatility losses can be controlled to essentially no losses with a modest overpressure. Experimental results also showed volatile species retention down to no detectable losses through overpressure, although the loss values varied from the model results the same trend was seen. Bases on these results it is very probably that americium losses through volatility can be controlled to no detectable losses through application of a modest overpressure during casting.

Randall S. Fielding; Douglas L. Proter

2013-10-01T23:59:59.000Z

26

Lightweight products with metal foam -- Properties and methods of processing  

SciTech Connect

The aim of future production technology is the economic application of lightweight components with improved property profiles. Demands for weight reduction made by both the automotive industry and the machine-building industry can be met through selective utilization of metal foam composite--structures. To that end, basic investigations into material behavior and the machineability of metal foam composites are necessary. The presentation will submit an overview of the properties and processing parameters of selected composites based on an analysis of industrial requirements. The development of analytical models of the process mechanics will contribute to the creation of preconditions for a numerical simulation of selected processes. Innovative applications and the potential for future use of metal foam composites in lightweight construction will be shown as well. Finally, results from projects of the Fraunhofer-Institut fuer Werkzeugmaschinen und Umformtechnik together with industrial companies in Saxony will be presented.

Neugebauer, R. [Institutsleiter FhG IWU, Chemnitz (Germany); Braeunlich, H.; Wagner, U. [Abteilung Umformtechnologien FhG IWU, Chemnitz (Germany)

1998-12-31T23:59:59.000Z

27

ITP Metal Casting: Metalcasting Industry Technology Roadmap  

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

Castings are essential building blocks of U. S. industry. More than 90% of all mnaufactured, durable good and 100% of all manufacturing machinery contain castings.

28

Method and mold for casting thin metal objects  

SciTech Connect

Provided herein are various embodiments of systems for casting thin metal plates and sheets. Typical embodiments include layers of mold cavities that are oriented vertically for casting the metal plates. In some embodiments, the mold cavities include a beveled edge such that the plates that are cast have a beveled edge. In some embodiments, the mold cavities are filled with a molten metal through an open horizontal edge of the cavity. In some embodiments, the mold cavities are filled through one or more vertical feed orifices. Further disclosed are methods for forming a thin cast metal plate or sheet where the thickness of the cast part is in a range from 0.005 inches to 0.2 inches, and the surface area of the cast part is in a range from 16 square inches to 144 square inches.

Pehrson, Brandon P; Moore, Alan F

2014-04-29T23:59:59.000Z

29

Material accountancy for metallic fuel pin casting  

SciTech Connect

The operation of the Fuel Conditioning Facility (FCF) is based on the electrometallurgical processing of spent metallic reactor fuel. The pin casting operation, although only one of several operations in FCF, was the first to be on-line. As such, it has served to demonstrate the material accountancy system in many of its facets. This paper details, for the operation of the pin casting process with depleted uranium, the interaction between the mass tracking system (MTG) and some of the ancillary computer codes which generate pertinent information for operations and material accountancy. It is necessary to distinguish between two types of material balance calculations -- closeout for operations and material accountancy for safeguards. The two have much in common, for example, the mass tracking system database and the calculation of an inventory difference, but, in general, are not congruent with regard to balance period and balance spatial domain. Moreover, the objective, assessment, and reporting requirements of the calculated inventory difference are very different in the two cases.

Bucher, R.G.; Orechwa, Y.; Beitel, J.C.

1995-08-01T23:59:59.000Z

30

Metallic Fuel Casting Development and Parameter Optimization Simulations  

SciTech Connect

One of the advantages of metallic fuel is the abilility to cast the fuel slugs to near net shape with little additional processing. However, the high aspect ratio of the fuel is not ideal for casting. EBR-II fuel was cast using counter gravity injection casting (CGIC) but, concerns have been raised concerning the feasibility of this process for americium bearing alloys. The Fuel Cycle Research and Development program has begun developing gravity casting techniques suitable for fuel production. Compared to CGIC gravity casting does not require a large heel that then is recycled, does not require application of a vacuum during melting, and is conducive to re-usable molds. Development has included fabrication of two separate benchscale, approximately 300 grams, systems. To shorten development time computer simulations have been used to ensure mold and crucible designs are feasible and to identify which fluid properties most affect casting behavior and therefore require more characterization.

R.S. Fielding; J. Crapps; C. Unal; J.R. Kennedy

2013-03-01T23:59:59.000Z

31

ITP Metal Casting: Metalcasting Industry Technology Roadmap  

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

A partial listing of these projects is provided below. Products and Markets ' Casting Conversions Materials Technology ' Development of Material Data Bases for HPNb and HPNb+...

32

Cast Metal Coalition Research and Development Closeout Report  

SciTech Connect

The Cast Metal Coalition, composed of more than 22 research providers and universities and 149 industrial partners, has completed a four-year research and development partnership with the Department of Energy. This report provides brief summaries of the 29 projects performed by the Coalition. These projects generated valuable information in such aspects of the metals industry as process prediction technologies, quality control, improved alloys, product machinability, and casting process improvements.

Allen, D.

2000-08-01T23:59:59.000Z

33

Aluminium foams for lighter vehicles  

Science Journals Connector (OSTI)

Metallic foams have become an attractive research field both from the scientific viewpoint and the prospect of industrial applications. Various methods for making such foams are available. Some techniques start from specially prepared molten metals with adjusted viscosities. Such melts can be foamed by injecting gases or by adding gas-releasing blowing agents which decompose in-situ, causing the formation of bubbles. A further way is to start from solid precursors containing a blowing agent. These can be prepared by mixing metal powders with a blowing agent, compacting the mix and then foaming the compact by melting. Alternatively, casting routes can be used to make such precursors. The unique properties of foams promise a variety of applications in vehicle design ranging from light-weight construction, impact energy absorption to various types of acoustic damping and thermal insulation. Four applications are discussed, including a lifting arm on a lorry, an automobile and a train crash box, and a motor bracket.

John Banhart

2005-01-01T23:59:59.000Z

34

Electromagnetic augmentation for casting of thin metal sheets  

DOE Patents (OSTI)

Thin metal sheets are cast by magnetically levitating molten metal deposited in a model within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled by the water-cooled walls of the mold to form a solid metal sheet. A conducting shield is electrically coupled to the molten metal sheet to provide a return path for eddy currents induced in the metal sheet by the current in the AC conducting coils. In another embodiment, a DC conducting coil is coupled to the metal sheet for providing a direct current therein which interacts with the magnetic field to levitate the moving metal sheet. Levitation of the metal sheet in both molten and solid forms reduces its contact pressure with the mold walls while maintaining sufficient engagement therebetween to permit efficient conductive cooling by the mold through which a coolant fluid may be circulated. 8 figs.

Hull, J.R.

1987-10-28T23:59:59.000Z

35

Optimization of functionally graded metallic foam insulation under transient heat transfer conditions  

Science Journals Connector (OSTI)

The problem of minimizing the maximum temperature of a structure insulated by a functionally graded metal foam insulation under transient heat conduction is studied. First, the performance of insulation designed ...

H. Zhu; B.V. Sankar; R.T. Haftka

2004-11-01T23:59:59.000Z

36

Casting of metallic fuel containing minor actinide additions  

SciTech Connect

A significant attribute of the Integral Fast Reactor (IFR) concept is the transmutation of long-lived minor actinide fission products. These isotopes require isolation for thousands of years, and if they could be removed from the waste, disposal problems would be reduced. The IFR utilizes pyroprocessing of metallic fuel to separate auranium, plutonium, and the minor actinides from nonfissionable constituents. These materials are reintroduced into the fuel and reirradiated. Spent IFR fuel is expected to contain low levels of americium, neptunium, and curium because the hard neutron spectrum should transmute these isotopes as they are produced. This opens the possibility of using an IFR to trnasmute minor actinide waste from conventional light water reactors (LWRs). A standard IFR fuel is based on the alloy U-20% Pu-10% Zr (in weight percent). A metallic fuel system eases the requirements for reprocessing methods and enables the minor actinide metals to be incorporated into the fuel with simple modifications to the basic fuel casting process. In this paper, the authors report the initial casting experience with minor actinide element addition to an IFR U-Pu-Zr metallic fuel.

Trybus, C.L.; Henslee, S.P. (Argonne National Lab.-West, Idaho Falls, ID (United States)); Sanecki, J.E. (Argonne National Lab., IL (United States))

1992-01-01T23:59:59.000Z

37

ITP Metal Casting: Advanced Melting Technologies: Energy Saving Concepts and Opportunities for the Metal Casting Industry  

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

The study examines current and emerging melting technologies and discusses their technical barriers to scale-up issues and research needed to advance these technologies, improving melting efficiency, lowering metal transfer heat loss, and reducing scrap.

38

Holographic study of conventional and negative Poisson's ratio metallic foams  

E-Print Network (OSTI)

. Inhomogeneous, non-affine deformation was observed holographically in both foam materials. Introduction in this series were determined from displacement measurements of high magnification video tapes of the tensile a very useful and reliable tool to determine the Poisson's ratio of orthotropic FRP (Fiber Reinforced

Lakes, Roderic

39

REFORMULATION OF COAL-DERIVED TRANSPORTATION FUELS: SELECTIVE OXIDATION OF CARBON MONOXIDE ON METAL FOAM CATALYSTS  

SciTech Connect

Uses for structured catalytic supports, such as ceramic straight-channel monoliths and ceramic foams, have been established for a long time. One of the most prominent examples is the washcoated ceramic monolith as a three-way catalytic converter for gasoline-powered automobiles. A distinct alternative to the ceramic monolith is the metal foam, with potential use in fuel cell-powered automobiles. The metal foams are characterized by their pores per inch (ppi) and density ({rho}). In previous research, using 5 wt% platinum (Pt) and 0.5 wt% iron (Fe) catalysts, washcoated metal foams, 5.08 cm in length and 2.54 cm in diameter, of both varying and similar ppi and {rho} were tested for their activity (X{sub CO}) and selectivity (S{sub CO}) on a CO preferential oxidation (PROX) reaction in the presence of a H{sub 2}-rich gas stream. The variances in these metal foams' activity and selectivity were much larger than expected. Other structured supports with 5 wt% Pt, 0-1 wt% Fe weight loading were also examined. A theory for this phenomenon states that even though these structured supports have a similar nominal catalyst weight loading, only a certain percentage of the Pt/Fe catalyst is exposed on the surface as an active site for CO adsorption. We will use two techniques, pulse chemisorption and temperature programmed desorption (TPD), to characterize our structured supports. Active metal count, metal dispersion, and other calculations will help clarify the causes for the activity and selectivity variations between the supports. Results on ceramic monoliths show that a higher Fe loading yields a lower dispersion, potentially because of Fe inhibition of the Pt surface for CO adsorption. This theory is used to explain the reason for activity and selectivity differences for varying ppi and {rho} metal foams; less active and selective metal foams have a lower Fe loading, which justifies their higher metal dispersion. Data on the CO desorption temperature and average metal crystallite size for TPD are also collected.

Paul Chin; George W. Roberts; James J. Spivey

2003-12-31T23:59:59.000Z

40

Shear properties on aluminum metal foams prepared by the melt route  

SciTech Connect

The shear modulus and shear strength of AlSi7Mg Aluminum foam with 15% (vol) of 13 {micro}m SiC particles were determined through shear testing. A foam slab with a density of 0.31 g/cm3 was supplied by Hydro Aluminium. Four samples were tested according to ASTM C 273-61. The specimens were bonded to steel load plates. The relative displacement of the plates was measured using two extensometers. In order to evaluate the effect of the cell size distribution on shear properties, cell size and material distribution analyses were carried out for the metal foam slab in areas close to those from which the shear specimens were extracted. A fast failure was observed after the maximum shear load. The failure in the samples were located in the central section of the slab mainly because the lower density was located there.

Saenz, E. [UTRC GmbH, Aachen (Germany). Technologiezentrum; Baranda, P.S. [UTRC, S.L., Minano (Spain); Bonhomme, J. [ITMA, Coruno-Llanera (Spain). Parque Tecnologico de Asturias

1998-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Analysis of Sandwich Shells with Metallic Foam Cores based on the Uniaxial Tensile Test  

SciTech Connect

On this work, the authors present the development and evaluation of an innovative system able to perform reliable panels of sandwich sheets with metallic foam cores for industrial applications, especially in automotive and aeronautical industries. This work is divided into two parts; in the first part the mathematical model used to describe the behavior of sandwich shells with metal cores form is presented and some numerical examples are presented. In the second part of this work, the numerical results are validated using the experimental results obtained from the mechanical experiments. Using the isotropic hardening crushable foam constitutive model, available on ABAQUS, a set of different mechanical tests were simulated. The isotropic hardening model available uses a yield surface that is an ellipse centered at the origin in the p-q stress plane. Using this constitutive model, the uniaxial tensile test for this material was simulated, and a comparison with the experimental results was made.

Mata, H.; Fernandes, A. A.; Parente, M. P. L.; Jorge, R. Natal [IDMEC-FEUP, Rua Dr. Roberto Frias, 4200-465, Porto (Portugal); Santos, A. [INEGI, Rua Dr. Roberto Frias, 4200-465, Porto (Portugal); Valente, R. A. F. [Universidade de Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro (Portugal)

2011-05-04T23:59:59.000Z

42

Metal foam-supported PdRh catalyst for steam methane reforming and its application to SOFC fuel processing  

Science Journals Connector (OSTI)

Abstract PdRh/metal foam catalyst was studied for steam methane reforming and application to SOFC fuel processing. Performance of 0.068wt% PdRh/metal foam catalyst was compared with 13wt% Ni/Al2O3 and 8wt% Ru/Al2O3 catalysts in a tubular reactor. At 1023K with GHSV 2000h?1 and S/C ratio 2.5, CH4 conversion and H2 yield were 96.7% and 3.16molper mole of CH4 input for PdRh/metal foam, better than the alumina-supported catalysts. In 200h stability test, PdRh/metal foam catalyst exhibited steady activity. PdRh/metal foam catalyst performed efficiently in a heat exchanger platform reactor to be used as prototype SOFC fuel processor: at 983K with GHSV 1200h?1 and S/C ratio 2.5, CH4 conversion was nearly the same as that in the tubular reactor, except for more H2 and CO2 yields. Used PdRh/metal foam catalyst was characterized by SEM, TEM, BET and CO chemisorption measurements, which provided evidence for thermal stability of the catalyst.

Partho Sarothi Roy; No-Kuk Park; Kiseok Kim

2014-01-01T23:59:59.000Z

43

Energy Saving Melting and Revert Reduction Technology (Energy-SMARRT): Light Metals Permanent Mold Casting  

SciTech Connect

Current vehicles use mostly ferrous components for structural applications. It is possible to reduce the weight of the vehicle by substituting these parts with those made from light metals such as aluminum and magnesium. Many alloys and manufacturing processes can be used to produce these light metal components and casting is known to be most economical. One of the high integrity casting processes is permanent mold casting which is the focus of this research report. Many aluminum alloy castings used in automotive applications are produced by the sand casting process. Also, aluminum-silicon (Al-Si) alloys are the most widely used alloy systems for automotive applications. It is possible that by using high strength aluminum alloys based on an aluminum-copper (Al-Cu) system and permanent mold casting, the performance of these components can be enhanced significantly. This will also help to further reduce the weight. However, many technological obstacles need to be overcome before using these alloys in automotive applications in an economical way. There is very limited information in the open literature on gravity and low-pressure permanent mold casting of high strength aluminum alloys. This report summarizes the results and issues encountered during the casting trials of high strength aluminum alloy 206.0 (Al-Cu alloy) and moderate strength alloy 535.0 (Al-Mg alloy). Five engineering components were cast by gravity tilt-pour or low pressure permanent mold casting processes at CanmetMATERIALS (CMAT) and two production foundries. The results of the casting trials show that high integrity engineering components can be produced successfully from both alloys if specific processing parameters are used. It was shown that a combination of melt processing and mold temperature is necessary for the elimination of hot tears in both alloys.

Fasoyinu, Yemi [CanmetMATERIALS] [CanmetMATERIALS

2014-03-31T23:59:59.000Z

44

ITP Metal Casting: Energy Use in Selected Metalcasting Facilities- 2003  

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

This report represents an energy benchmark for various metalcasting processes. It describes process flows and energy use by fuel type and processes for selected casting operations. It also provides recommendations for improving energy efficiency in casti

45

A continuum plasticity model for the constitutive behavior of foamed metals  

SciTech Connect

A yield surface is proposed that can be fit to the plastic flow properties of a broad class of solids which exhibit plastic compressibility and different yield points in tension and compression. The yield surface is proposed to describe cellular solids, including foamed metals, and designed to be fit to three simple experimental results: (1) the compressive stress-strain response (including densification), (2) the difference between the tensile and compressive yield points and (3) the degree of compressibility of the foam, as measured by the lateral expansion during a uniaxial compression test. The model is implemented using finite elements and used to study the effects of plastic compressibility on two problems: the compression of a doubly notched specimen and indentation by a spherical indenter.

Miller, R.E.; Hutchinson, J.W. [Harvard Univ., Cambridge, MA (United States). Div. of Applied Science

1998-12-31T23:59:59.000Z

46

Aluminum foam, ALPORAS: The production process, properties and applications  

SciTech Connect

The production of foamed aluminum has long been considered difficult to realize because of such problems as the low foamability of molten metal, the varying size of cellular structures, solidification shrinkage and so on. Recently these problems have been solved by a number of researchers and some manufacturers produce foamed aluminum by their own methods. The authors have been employing a batch casting process and manufacturing foamed aluminum under the tradename ALPORAS{reg_sign} since 1986. This paper presents the manufacturing process, physical properties and some typical applications of ALPORAS.

Miyoshi, T.; Itoh, M. [Shinko Wire Co., Ltd., Amagasaki (Japan); Akiyama, S.; Kitahara, A. [Kyushu National Industrial Research Inst., Tosu (Japan). Material Engineering Dept.

1998-12-31T23:59:59.000Z

47

High-Energy Redox-Flow Batteries with Hybrid Metal Foam Electrodes  

Science Journals Connector (OSTI)

A nonaqueous redox-flow battery employing [Co(bpy)3]+/2+ and [Fe(bpy)3]2+/3+ redox couples is proposed for use in large-scale energy-storage applications. ... We successfully demonstrate a redox-flow battery with a practical operating voltage of over 2.1 V and an energy efficiency of 85% through a rational cell design. ... By utilizing carbon-coated Ni-FeCrAl and Cu metal foam electrodes, the electrochemical reactivity and stability of the nonaqueous redox-flow battery can be considerably enhanced. ...

Min-Sik Park; Nam-Jin Lee; Seung-Wook Lee; Ki Jae Kim; Duk-Jin Oh; Young-Jun Kim

2014-06-06T23:59:59.000Z

48

REFORMULATION OF COAL-DERIVED TRANSPORTATION FUELS: SELECTIVE OXIDATION OF CARBON MONOXIDE ON METAL FOAM CATALYSTS  

SciTech Connect

Hydrocarbon fuels must be reformed in a series of steps to provide hydrogen for use in proton exchange membrane fuel cells (PEMFCs). Preferential oxidation (PROX) is one method to reduce the CO concentration to less than 10 ppm in the presence of {approx}40% H{sub 2}, CO{sub 2}, and steam. This will prevent CO poisoning of the PEMFC anode. Structured supports, such as ceramic monoliths, can be used for the PROX reaction. Alternatively, metal foams offer a number of advantages over the traditional ceramic monolith.

Paul Chin; Xiaolei Sun; George W. Roberts; Amornmart Sirijarhuphan; Sourabh Pansare; James G. Goodwin Jr; Richard W. Rice; James J. Spivey

2005-06-01T23:59:59.000Z

49

Graded pitch electromagnetic pump for thin strip metal casting systems  

DOE Patents (OSTI)

A metal strip casing system is provided with an electromagnetic pump which includes a pair of primary blocks having a graded pole pitch, polyphase ac winding and being arranged on opposite sides of a movable heat sink. A nozzle is provided for depositing liquid metal on the heat sink such that the resulting metal strip and heat sink combination is subjected to a longitudinal electromagnetic field which increases in wavelength in the direction of travel of the heat sink, thereby subjecting the metal and heat sink to a longitudinal force having a magnitude which increases in the direction of travel. 4 figs.

Kuznetsov, S.B.

1986-04-01T23:59:59.000Z

50

nanoFOAM  

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

nanoFOAM nanoFOAM nanoFOAM Los Alamos National Laboratory's (LANL) nanoFOAM technique produces self-supporting, nanoporous metal foams. July 30, 2013 nanoFOAM In the upper left frame, the slanted U-shape with the bright spot is a resistively heated wire igniting a pellet pressed from one of our high-nitrogen transition-metal complexes. (The spot is a reflection from the window of the experimental chamber.) As the pellet rapidly burns, its volume dramatically increases as nitrogen gas released by the combustion creates nanoscopic pores in coalescing metal particles that are also released. Available for thumbnail of Feynman Center (505) 665-9090 Email nanoFOAM Applications: Nanofoams can improve the efficiencies of: Catalytic production of ammonia, sulfuric acid, fuels, plastics,

51

Apparatus for injection casting metallic nuclear energy fuel rods  

DOE Patents (OSTI)

Molds for making metallic nuclear fuel rods are provided which present reduced risks to the environment by reducing radioactive waste. In one embodiment, the mold is consumable with the fuel rod, and in another embodiment, part of the mold can be re-used. Several molds can be arranged together in a cascaded manner, if desired, or several long cavities can be integrated in a monolithic multiple cavity re-usable mold.

Seidel, Bobby R. (Idaho Falls, ID); Tracy, Donald B. (Firth, ID); Griffiths, Vernon (Butte, MT)

1991-01-01T23:59:59.000Z

52

Journal of Crystal Growth 287 (2006) 402407 Transition metals in photovoltaic-grade ingot-cast multicrystalline  

E-Print Network (OSTI)

Journal of Crystal Growth 287 (2006) 402­407 Transition metals in photovoltaic-grade ingot silicon (mc-Si) ingot casting for cost-effective solar cell wafer production. Highly sensitive to the invited talk ``Transition metals in photovoltaic-grade multicrystalline silicon'' by A.A. Istratov, T

53

Advanced Pattern Material for Investment Casting Applications  

SciTech Connect

Cleveland Tool and Machine (CTM) of Cleveland, Ohio in conjunction with Harrington Product Development Center (HPDC) of Cincinnati, Ohio have developed an advanced, dimensionally accurate, temperature-stable, energy-efficient and cost-effective material and process to manufacture patterns for the investment casting industry. In the proposed technology, FOPAT (aFOam PATtern material) has been developed which is especially compatible with the investment casting process and offers the following advantages: increased dimensional accuracy; increased temperature stability; lower cost per pattern; less energy consumption per pattern; decreased cost of pattern making equipment; decreased tooling cost; increased casting yield. The present method for investment casting is "the lost wax" process, which is exactly that, the use of wax as a pattern material, which is then melted out or "lost" from the ceramic shell. The molten metal is then poured into the ceramic shell to produce a metal casting. This process goes back thousands of years and while there have been improvements in the wax and processing technology, the material is basically the same, wax. The proposed technology is based upon an established industrial process of "Reaction Injection Molding" (RIM) where two components react when mixed and then "molded" to form a part. The proposed technology has been modified and improved with the needs of investment casting in mind. A proprietary mix of components has been formulated which react and expand to form a foam-like product. The result is an investment casting pattern with smooth surface finish and excellent dimensional predictability along with the other key benefits listed above.

F. Douglas Neece Neil Chaudhry

2006-02-08T23:59:59.000Z

54

Energy Saving Melting and Revert Reduction (E-SMARRT): Precision Casting of Steel  

SciTech Connect

This project addresses improvements in metal casting processes by reducing scrap and reducing the cost of production, due to scrap reduction from investment casting and yield improvement offered by lost foam casting as compared to no-bake or green sand molding. The objectives for the investment casting portion of the subtask are to improve knowledge of fracture toughness of mold shells and the sources of strength limiting flaws and to understand the effects of wax reclamation procedures on wax properties. Applying 'clean steel' approaches to pouring technology and cleanliness in investment casting of steel are anticipated to improve incoming materials inspection procedures as they affect the microstructure and toughness of the shell. This project focused on two areas of study in the production of steel castings to reduce scrap and save energy: (1) Reducing the amount of shell cracking in investment cast steel production; (2) Investigate the potential of lost foam steel casting The basic findings regarding investment casting shell cracking were: (1) In the case of post pouring cracking, this could be related to phase changes in silica upon cooling and could be delayed by pouring arrangement strategies that maintained the shell surface at temperature for longer time. Employing this delay resulted in less adherent oxidation of castings since the casting was cooler at the time o fair exposure. (2) A model for heat transfer through water saturated shell materials under steam pressure was developed. (3) Initial modeling result of autoclave de-waxing indicated the higher pressure and temperature in the autoclave would impose a steeper temperature gradient on the wax pattern, causing some melt flow prior to bulk expansion and decreasing the stress on the green shell. Basic findings regarding lost foam casting of steel at atmospheric pressure: (1) EPS foam generally decomposes by the collapse mode in steel casting. (2) There is an accumulation of carbon pick-up at the end of the casting opposite the gate. (3) It is recommended that lost foam castings in steel be gated for a quiescent fill in an empty cavity mold to prevent foam occlusion defects from the collapse mode. The energy benefit is primarily in yield savings and lower casting weight per function due to elimination of draft and parting lines for the larger lost foam castings. For the smaller investment casting, scrap losses due to shell cracking will be reduced. Both of these effects will reduce the metal melted per good ton of castings. There will also be less machine stock required per casting which is a yield savings and a small additional energy savings in machining. Downstream savings will come from heavy truck and railroad applications. Application of these processes to heavy truck castings will lighten the heavy truck fleet by about ten pounds per truck. Using ten years to achieve full penetration of the truck fleet at linear rate this will result in a fuel savings of 131 trillion BTU over ten years.

Dr. Von L. Richards

2011-09-30T23:59:59.000Z

55

A survey of foundries that cast red brass products to ascertain an effective pouring rate of molten metal  

E-Print Network (OSTI)

A SURVEY OF FOUNDRIES THAT CAST RED BRASS PRODUCTS TO ASCERTAIN AN EFPECTIVE POURING RATE OF MOLTEN METAL A Thesis by RONALD KEE TOM Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE May 1974 Major Subject: Industrial Technology A SURVEY OF FOUNDRIES THAT CAST RED BRASS PRODUCTS TO ASCERTAIN AN EFFECTIVE POURING RATE OF MOLTEN METAL A Thesis by RONALD KEE TOM Approved as to style and content by...

Tom, Ronald Kee

2012-06-07T23:59:59.000Z

56

Size-resolved engine exhaust aerosol characteristics in a metal foam particulate filter for GDI light-duty vehicle  

Science Journals Connector (OSTI)

The particulate emissions generated from a side-mounted 2.4L gasoline direct injection (GDI) engine were evaluated using a metal foam-type gasoline particulate filter (GPF), placed on the downstream of a three-way catalyst. An ULEV legislation-compliant light-duty vehicle was tested under the new European driving cycle (NEDC) and at constant-speed driving conditions. Particle number (PN) concentrations, particulate size distribution and the filtration efficiency of the GPF were evaluated with the condensation particle counter (CPC) and the differential mobility spectrometer (DMS). The PN emissions for the entire NEDC were 1.17E+12N/km for the base GDI vehicle and 4.99E+11N/km for the GPF-equipped GDI vehicle, and the filtration efficiency of the GPF was 57%. In particular, the number of sub-23nm particles formed in the GDI vehicle was substantially reduced, with 97% efficiency. The pressure drop in the metal foam-type GPF was constrained to be below 1.0kPa at a 120km/h vehicle speed, and as a result, the fuel economy and the CO2 emission for the GPF-applied vehicle were equivalent to those for the base vehicle.

Kwanhee Choi; Juwon Kim; Ahyun Ko; Cha-Lee Myung; Simsoo Park; Jeongmin Lee

2013-01-01T23:59:59.000Z

57

Ceramic plasma-sprayed coating of melting crucibles for casting metal fuel slugs  

SciTech Connect

Thermal cycling and melt reaction studies of ceramic coatings plasma-sprayed on Nb substrates were carried out to evaluate the performance of barrier coatings for metallic fuel casting applications. Thermal cycling tests of the ceramic plasma-sprayed coatings to 1450 degrees C showed that HfN, TiC, ZrC, and Y2O3 coating had good cycling characteristics with few interconnected cracks even after 20 cycles. Interaction studies by 1550 degrees C melt dipping tests of the plasma-sprayed coatings also indicated that HfN and Y2O3 do not form significant reaction layer between U20 wt.% Zr melt and the coating layer. Plasma-sprayed Y2O3 coating exhibited the most promising characteristics among HfN, TiC, ZrC, and Y2O3 coating.

K.H. Kim; C.T. Lee; C.B. Lee; R.S. Fielding; J.R. Kennedy

2013-10-01T23:59:59.000Z

58

Molten metal holder furnace and casting system incorporating the molten metal holder furnace  

DOE Patents (OSTI)

A bottom heated holder furnace (12) for containing a supply of molten metal includes a storage vessel (30) having sidewalls (32) and a bottom wall (34) defining a molten metal receiving chamber (36). A furnace insulating layer (42) lines the molten metal receiving chamber (36). A thermally conductive heat exchanger block (54) is located at the bottom of the molten metal receiving chamber (36) for heating the supply of molten metal. The heat exchanger block (54) includes a bottom face (65), side faces (66), and a top face (67). The heat exchanger block (54) includes a plurality of electrical heaters (70) extending therein and projecting outward from at least one of the faces of the heat exchanger block (54), and further extending through the furnace insulating layer (42) and one of the sidewalls (32) of the storage vessel (30) for connection to a source of electrical power. A sealing layer (50) covers the bottom face (65) and side faces (66) of the heat exchanger block (54) such that the heat exchanger block (54) is substantially separated from contact with the furnace insulating layer (42).

Kinosz, Michael J. (Apollo, PA); Meyer, Thomas N. (Murrysville, PA)

2003-02-11T23:59:59.000Z

59

Panelized wall system with foam core insulation  

DOE Patents (OSTI)

A wall system includes a plurality of wall members, the wall members having a first metal panel, a second metal panel, and an insulating core between the first panel and the second panel. At least one of the first panel and the second panel include ridge portions. The insulating core can be a foam, such as a polyurethane foam. The foam can include at least one opacifier to improve the k-factor of the foam.

Kosny, Jan (Oak Ridge, TN); Gaskin, Sally (Houston, TX)

2009-10-20T23:59:59.000Z

60

Electrode Plate For An Eletrlchemical Cell And Having A Metal Foam Type Support, And A Method Of Obtaining Such An Electrode  

DOE Patents (OSTI)

The electrode plate includes an active portion that is pasted with active material, and a plate head that is made up of three layers of compressed metal foam comprising: a non-pasted portion of height G of the support of the electrode plate; and two strips of non-pasted metal foam of height R on either side of the non-pasted portion of height G of the support and also extending for an overlap height h.sub.2 over the pasted portion of the support. The plate head includes a zone of reduced thickness including a portion that is maximally compressed, and a transitional portion between said maximally compressed portion and the remainder of the electrode which is of thickness e.sub.2. A portion of said plate head forms a connection tab. The method of obtaining the electrode consists in simultaneously rolling all three layers of metal foam in the plate head, and then in cutting matter away from the plates so as to obtain respective connection tabs.

Verhoog, Roelof (Bordeaux, FR); Precigout, Claude (Bordeaux, FR); Stewart, Donald (Bordeaux, FR)

1996-05-21T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Method Of Bonding A Metal Connection To An Electrode Including A Core Having A Fiber Or Foam Type Structure For An Electrochemical Cell, An  

SciTech Connect

A method of bonding a metal connection to an electrode including a core having a fiber or foam-type structure for an electrochemical cell, in which method at least one metal strip is pressed against one edge of the core and is welded thereto under compression, wherein, at least in line with the region in which said strip is welded to the core, which is referred to as the "main core", a retaining core of a type analogous to that of the main core is disposed prior to the welding.

Loustau, Marie-Therese (Bordeaux, FR); Verhoog, Roelof (Bordeaux, FR); Precigout, Claude (Lormont, FR)

1996-09-24T23:59:59.000Z

62

Prompt Neutron Time Decay in Single HEU and DU Metal Annular Storage Castings  

SciTech Connect

Previous measurements of highly enriched uranium (HEU) storage castings performed by Oak Ridge National Laboratory (ORNL) at the Y-12 National Security Complex showed a prompt neutron time decay that is not exponential. These measurements showed that multiple time constants originating from multiplication, time-of-flight, scattering in the assembly and room return could be associated with this prompt neutron decay. In this work, the contribution not associated with neutron multiplication was investigated via measurements with a depleted uranium (DU) casting. The measurements at ORNL used an annular (5.0-in OD, 3.5-in ID, 6.0-in H) DU casting with a time-tagged 252Cf source, centered vertically on the axis, and four closely coupled 1 1 6-in.-long plastic scintillators with -in.- thick lead shielding adjacent to the outer surface of the casting. This setup was identical to the configuration used in the previously performed measurements with HEU castings at Y-12. The time correlation between fission events and detections in the plastic scintillators was measured, as well as the time distribution of coincidences between multiple detectors within a 512-ns time window. The measurement results were then compared to MCNP-PoliMi calculations and the previous HEU measurements. Time constants from decay fits to the HEU and DU data were compared to characterize the contributions resulting from multiplication, time-of-flight, and scattering.

Pena, Kirsten E [ORNL] [ORNL; McConchie, Seth M [ORNL] [ORNL; Mihalczo, John T [ORNL] [ORNL

2010-01-01T23:59:59.000Z

63

Investigation for the selection of foaming agents to produce steel foams  

SciTech Connect

During earlier investigators conducted at the Fraunhofer Institute for Applied Materials Research (IFAM), concentrating on the metal foaming technology using the powder metallurgy process, it was shown that some steel alloys are foamable with Fraunhofer`s patented powder technology approach. To further investigate the foamability of steel alloys, suitable foaming agents need to be identified and characterized. This article reports the finding of two metallic compounds used for steel foaming. The foaming behaviors of the selected foaming agents in the steel powder compacts are also evaluated in terms of different alloying elements.

Yu, C.J.; Eifert, H.H. [Fraunhofer Resource Center Delaware, Newark, DE (United States); Knuewer, M.; Weber, M.; Baumeister, J. [Fraunhofer Inst. for Applied Materials Research, Bremen (Germany)

1998-12-31T23:59:59.000Z

64

Field Evaluations of Low-Frequency SAFT-UT on Cast Stainless Steel and Dissimilar Metal Weld Components  

SciTech Connect

This report documents work performed at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington, and at the Electric Power Research Institute's (EPRI) Nondestructive Examination (NDE) Center in Charlotte, North Carolina, on evalutating a low frequency ultrasonic inspection technique used for examination of cast stainless steel (CSS) and dissimilar metal (DMW) reactor piping components. The technique uses a zone-focused, multi-incident angle, low frequency (250-450 kHz) inspection protocol coupled with the synthetic aperture focusing technique (SAFT). The primary focus of this work is to provide information to the United States Nuclear Regulatory Commission on the utility, effectiveness and reliability of ultrasonic testing (UT) inspection techniques as related to the inservice ultrasonic inspection of coarse grained primary piping components in pressurized water reactors (PWRs).

Diaz, Aaron A.; Harris, R. V.; Doctor, Steven R.

2008-11-01T23:59:59.000Z

65

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

E-Print Network (OSTI)

arc welding GTAW Gas tungsten arc welding HAZ Heat affected zone HF High frequency MMC Metal matrix composite MMCs Metal matrix composites NDE Non-destructive examination SAW Submerged arc welding SMAW Shielded metal arc... limited their applications. Further, the use of composite materials requires us to stay from the established processes and areas of practice that were relevant to more conventional engineering materials. Except for gas tungsten arc welding (GTAW...

Kothari, Mitul Arvind

2005-11-01T23:59:59.000Z

66

A National Assistance Extension Program for Metal Casting: a foundation industry. Final report for the period February 16, 1994 through May 15, 1997  

SciTech Connect

The TRP award was proposed as an umbrella project to build infrastructure and extract lessons about providing extension-enabling services to the metal casting industry through the national network of Manufacturing Technology Center`s (MTC`s). It targeted four discrete task areas required for the MCC to service the contemplated needs of industry, and in which the MCC had secured substantial involvement of partner organizations. Task areas identified included Counter-Gravitational Casting, Synchronous Manufacturing, Technology Deployment, and Facility and Laboratory Improvements. Each of the task areas includes specific subtasks which are described.

NONE

1997-09-01T23:59:59.000Z

67

Strip casting apparatus and method  

DOE Patents (OSTI)

Strip casting apparatus including a molten-metal-holding container and a nozzle to deposit molten metal onto a moving chill drum to directly cast continuous metallic strip. The nozzle body includes a slot bounded between a back and a front lip. The slot width exceeds about 20 times the gap distance between the nozzle and the chill drum surface. Preferably, the slot width exceeds 0.5 inch. This method of strip casting minimizes pressure drop, insuring better metal-to-chill-drum contact which promotes heat transfer and results in a better quality metallic strip. 6 figs.

Williams, R.S.; Baker, D.F.

1988-09-20T23:59:59.000Z

68

Pitch based foam with particulate  

DOE Patents (OSTI)

A thermally conductive, pitch based foam composite having a particulate content. The particulate alters the mechanical characteristics of the foam without severely degrading the foam thermal conductivity. The composite is formed by mixing the particulate with pitch prior to foaming.

Klett, James W. (Knoxville, TN)

2001-01-01T23:59:59.000Z

69

Energy Consumption of Die Casting Operations  

SciTech Connect

Molten metal processing is inherently energy intensive and roughly 25% of the cost of die-cast products can be traced to some form of energy consumption [1]. The obvious major energy requirements are for melting and holding molten alloy in preparation for casting. The proper selection and maintenance of melting and holding equipment are clearly important factors in minimizing energy consumption in die-casting operations [2]. In addition to energy consumption, furnace selection also influences metal loss due to oxidation, metal quality, and maintenance requirements. Other important factors influencing energy consumption in a die-casting facility include geographic location, alloy(s) cast, starting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting machine, related equipment (robots, trim presses), and downstream processing (machining, plating, assembly, etc.). Each of these factors also may influence the casting quality and productivity of a die-casting enterprise. In a die-casting enterprise, decisions regarding these issues are made frequently and are based on a large number of factors. Therefore, it is not surprising that energy consumption can vary significantly from one die-casting enterprise to the next, and within a single enterprise as function of time.

Jerald Brevick; clark Mount-Campbell; Carroll Mobley

2004-03-15T23:59:59.000Z

70

The effect of oxide layers on gas-generating hydride particles during production of aluminium foams  

SciTech Connect

Melt routes to metallic foam production offer attractions of low cost and the potential for good microstructural control. In situ gas generation may be preferable to external gas injection in terms of the important objective of generating a fine and uniform cell structure. The main difficulty with this approach has been that of ensuring that the gas-generating powder is suitably dispersed throughout the melt before the gas is released and the cells are formed. In the present paper, procedures are outlined for preparation of powders for use in aluminium melts, where gas will be released only after a suitable delay, allowing the powders to first become well-dispersed in the melt and solidification to start. Pre-treatment of the foaming agent also facilitates a flexible production of castings with various porosity at the same processing conditions simply by varying the thickness of a diffusion barrier layer on the gas-releasing agent. The role of the melt viscosity history, as a function of a heat extraction rate from the solidifying melt and an alloy composition, on the final porosity of the castings is also briefly discussed.

Gergely, V.; Clyne, T.W. [Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy

1998-12-31T23:59:59.000Z

71

High Temperature Structural Foam  

Science Journals Connector (OSTI)

The Aerospace Industry is experiencing growing demand for high performance polymer foam. The X-33 program needs structural foam insulation capable of retaining its strength over a wide range of environmental conditions. The High Speed Research Program ...

Weiser Erik S.; Baillif Faye F.; Grimsley Brian W.; Marchello Joseph M.

1998-05-01T23:59:59.000Z

72

Foam Processing of Textiles  

E-Print Network (OSTI)

limits line speed of finishing ranges, the use of foam has led to doubling of line speeds. Foam finishing has also led to reduction in the consumption of chemical agents per unit of fabric because foam finishing provides for more uniform distribution...

Bafford, R. A.; Namboodri, C. G.

1984-01-01T23:59:59.000Z

73

Coated foams, preparation, uses and articles  

DOE Patents (OSTI)

Hydrophobic cellular material is coated with a thin hydrophilic polymer skin which stretches tightly over the foam but which does not fill the cells of the foam, thus resulting in a polymer-coated foam structure having a smoothness which was not possible in the prior art. In particular, when the hydrophobic cellular material is a specially chosen hydrophobic polymer foam and is formed into arbitrarily chosen shapes prior to the coating with hydrophilic polymer, inertial confinement fusion (ICF) targets of arbitrary shapes can be produced by subsequently coating the shapes with metal or with any other suitable material. New articles of manufacture are produced, including improved ICF targets, improved integrated circuits, and improved solar reflectors and solar collectors. In the coating method, the cell size of the hydrophobic cellular material, the viscosity of the polymer solution used to coat, and the surface tension of the polymer solution used to coat are all very important to the coating.

Duchane, D.V.; Barthell, B.L.

1982-10-21T23:59:59.000Z

74

Structural graphitic carbon foams  

SciTech Connect

Graphitic carbon foams are a unique material form with very high structural and thermal properties at a light weight. A process has been developed to produce microcellular, open-celled graphitic foams. The process includes heating a mesophase pitch preform above the pitch melting temperature in a pressurized reactor. At the appropriate time, the pressure is released, the gas nucleates bubbles, and these bubbles grow forming the pitch into the foam structure. The resultant foamed pitch is then stabilized in an oxygen environment. At this point a rigid structure exists with some mechanical integrity. The foam is then carbonized to 800 C followed by a graphitization to 2700 C. The shear action from the growing bubbles aligns the graphitic planes along the foam struts to provide the ideal structure for good mechanical properties. Some of these properties have been characterized for some of the foam materials. It is known that variations of the blowing temperature, blowing pressure and saturation time result in foams of variously sized with mostly open pores; however, the mechanism of bubble nucleation is not known. Therefore foams were blown with various gases to begin to determine the nucleation method. These gases are comprised of a variety of molecular weights as well as a range of various solubility levels. By examining the resultant structures of the foam, differences were noted to develop an explanation of the foaming mechanism.

Kearns, K.M.; Anderson, H.J. [Air Force Lab., Wright-Patterson AFB, OH (United States). Materials and Mfg. Directorate

1998-12-31T23:59:59.000Z

75

Development of microwave foaming method for phenolic insulation foams  

Science Journals Connector (OSTI)

Many types of foams are used for thermal insulation in building, frozen food industries and LNG containment systems. Low thermal conductivity, low density and low flammability are required for thermal insulation. Among many foams, phenolic foams are preferred for thermal insulation due to its lower flammability and lower gas generation than any other polymer insulation foams. However, it takes long time to manufacture large size phenolic foams and the environmental regulation limits the use of blowing agents. Urethane foams and polystyrene foams are widely used in spite of their high flammability and toxic gas generation because conventional phenolic foams usually have higher thermal conductivity than expected. In this work, a foaming method for the resole-type phenolic foams was developed using microwave and air instead of blowing agents, and its thermal and mechanical properties were measured. From the measured results, it was found that the phenolic foams developed had low thermal conductivity and low density suitable for insulation foams.

Bu Gi Kim; Dai Gil Lee

2008-01-01T23:59:59.000Z

76

The industrial ecology of the iron casting industry  

E-Print Network (OSTI)

Metal casting is an energy and materials intensive manufacturing process, which is an important U.S. industry. This study analyzes iron casting, in particular, for possible improvements that will result in greater efficiencies ...

Jones, Alissa J. (Alissa Jean)

2007-01-01T23:59:59.000Z

77

Nanoclay Syntactic Foam Composites.  

E-Print Network (OSTI)

??Syntactic foams are composite materials in which the matrix phase is reinforced with hollow particles called microballoons. They possess low moisture absorption, low thermal conductivity (more)

Peter, Sameer Leo

2008-01-01T23:59:59.000Z

78

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

SciTech Connect

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

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

1998-09-30T23:59:59.000Z

79

Strip casting with fluxing agent applied to casting roll  

DOE Patents (OSTI)

A strip caster (10) for producing a continuous strip (24) includes a tundish (12) for containing a melt (14), a pair of horizontally disposed water cooled casting rolls (22) and devices (29) for electrostatically coating the outer peripheral chill surfaces (44) of the casting rolls with a powder flux material (56). The casting rolls are juxtaposed relative to one another for forming a pouting basin (18) for receiving the melt through a teeming tube (16) thereby establishing a meniscus (20) between the rolls for forming the strip. The melt is protected from the outside air by a non-oxidizing gas passed through a supply line (28) to a sealing chamber (26). A preferred flux is boron oxide having a melting point of about 550.degree. C. The flux coating enhances wetting of the steel melt to the casting roll and dissolves any metal oxide formed on the roll.

Williams, Robert S. (Fairfield, OH); O'Malley, Ronald J. (Miamisburg, OH); Sussman, Richard C. (West Chester, OH)

1997-01-01T23:59:59.000Z

80

Recycling Foam Countercurrent Chromatography  

Science Journals Connector (OSTI)

A new sample injection method for foam countercurrent chromatography (CCC), named the recycle injection system, has been developed. ... In this recycling foam CCC system, the effluent from the liquid outlet is directly returned into the column through the sample feed line so that the sample solution is continuously recycled. ...

Hisao Oka; Masato Iwaya; Ken-ichi Harada; Makoto Suzuki; Yoichiro Ito

2000-02-26T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Casting methods  

DOE Patents (OSTI)

A casting device includes a covered crucible having a top opening and a bottom orifice, a lid covering the top opening, a stopper rod sealing the bottom orifice, and a reusable mold having at least one chamber, a top end of the chamber being open to and positioned below the bottom orifice and a vacuum tap into the chamber being below the top end of the chamber. A casting method includes charging a crucible with a solid material and covering the crucible, heating the crucible, melting the material, evacuating a chamber of a mold to less than 1 atm absolute through a vacuum tap into the chamber, draining the melted material into the evacuated chamber, solidifying the material in the chamber, and removing the solidified material from the chamber without damaging the chamber.

Marsden, Kenneth C.; Meyer, Mitchell K.; Grover, Blair K.; Fielding, Randall S.; Wolfensberger, Billy W.

2012-12-18T23:59:59.000Z

82

Foam encapsulated targets  

DOE Patents (OSTI)

Foam encapsulated laser-fusion targets wherein a quantity of thermonuclear fuel is embedded in low density, microcellular foam which serves as an electron conduction channel for symmetrical implosion of the fuel by illumination of the target by one or more laser beams. The fuel, such as DT, is contained within a hollow shell constructed of glass, for example, with the foam having a cell size of preferably no greater than 2 .mu.m, a density of 0.065 to 0.6.times.10.sup.3 kg/m.sup.3, and external diameter of less than 200 .mu.m.

Nuckolls, John H. (Livermore, CA); Thiessen, Albert R. (Livermore, CA); Dahlbacka, Glen H. (Livermore, CA)

1983-01-01T23:59:59.000Z

83

Foam drilling simulator  

E-Print Network (OSTI)

Although the use of compressible drilling fluids is experiencing growth, the flow behavior and stability properties of drilling foams are more complicated than those of conventional fluids. In contrast with conventional mud, the physical properties...

Paknejad, Amir Saman

2007-04-25T23:59:59.000Z

84

Compressive tensile and shear testing of melt-foamed aluminium  

SciTech Connect

For construction purposes it is utterly important to get detailed information on the possible influence of the foam thickness on the mechanical properties and on the deformation behavior of metallic foams. The effect of compressive, tensile and shear loads on aluminium foam samples has been examined with the testing methods for sandwich material as described in German and ASTM-standards. The aim is to provide more data on these mechanical properties varying the sample density and thickness. Regarding the results the most reliable material parameters as well as steps towards a relationship between the different strength parameters can be obtained.

Von Hagen, H.; Bleck, W. [Aachen Univ. of Technology (Germany). Inst. of Ferrous Metallurgy

1998-12-31T23:59:59.000Z

85

Method of preparation of removable syntactic foam  

DOE Patents (OSTI)

Easily removable, environmentally safe, low-density, syntactic foams are disclosed which are prepared by mixing insoluble microballoons with a solution of water and/or alcohol-soluble polymer to produce a pourable slurry, optionally vacuum filtering the slurry in varying degrees to remove unwanted solvent and solute polymer, and drying to remove residual solvent. The properties of the foams can be controlled by the concentration and physical properties of the polymer, and by the size and properties of the microballoons. The suggested solute polymers are non-toxic and soluble in environmentally safe solvents such as water or low-molecular weight alcohols. The syntactic foams produced by this process are particularly useful in those applications where ease of removability is beneficial, and could find use in packaging recoverable electronic components, in drilling and mining applications, in building trades, in art works, in the entertainment industry for special effects, in manufacturing as temporary fixtures, in agriculture as temporary supports and containers and for delivery of fertilizer, in medicine as casts and splints, as temporary thermal barriers, as temporary protective covers for fragile objects, as filters for particulate matter, which matter may be easily recovered upon exposure to a solvent, as in-situ valves (for one-time use) which go from maximum to minimum impedance when solvent flows through, and for the automatic opening or closing of spring-loaded, mechanical switches upon exposure to a solvent, among other applications.

Arnold, Jr., Charles (Albuquerque, NM); Derzon, Dora K. (Albuquerque, NM); Nelson, Jill S. (Albuquerque, NM); Rand, Peter B. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

86

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

87

Low density, microcellular, dopable, agar/gelatin foams for pulsed power experiments  

SciTech Connect

Low-density, microcellular foams prepared from the natural polymers agar and gelatin have been developed for pulsed-power physics experiments. Numerous experiments were supported with foams having densities at or below 10 mg/cm{sup 3}. For some of the experiments, the agar/gelatin foam was uniformly doped with metallic elements using soluble salts. Depending on the method of preparation, cell sizes were typically below 10 microns and for one process were below 1.0 micron.

McNamara, W.F. [Orion International Technologies, Inc., Albuquerque, NM (United States); Aubert, J.H. [Sandia National Lab., Albuquerque, NM (United States)

1997-04-01T23:59:59.000Z

88

Honeywell's Solstice liquid blowing agent approved by EPA for foam insulation  

Science Journals Connector (OSTI)

Honeywell has announced that its new low global-warming-potential (LGWP) blowing agent for foam insulation has received final approval from the US Environmental Protection Agency under the latter's Significant New Alternatives Policy (SNAP) programme. The approval allows the company's Solstice Liquid Blowing Agent (LBA) to be used in foam insulation in refrigerators, spray foam insulation for residential and commercial buildings, insulated metal panels and other applications in the USA.

2012-01-01T23:59:59.000Z

89

Surfactant monitoring by foam generation  

DOE Patents (OSTI)

A device for monitoring the presence or absence of active surfactant or other surface active agents in a solution or flowing stream based on the formation of foam or bubbles is presented. The device detects the formation of foam with a light beam or conductivity measurement. The height or density of the foam can be correlated to the concentration of the active surfactant present.

Mullen, Ken I. (Los Alamos, NM)

1997-01-01T23:59:59.000Z

90

Foams in porous media  

SciTech Connect

In 1978 a literature search on selective blocking of fluid flow in porous media was done by Professor S.S. Marsden and two of his graduate students, Tom Elson and Kern Huppy. This was presented as SUPRI Report No. TR-3 entitled ''Literature Preview of the Selected Blockage of Fluids in Thermal Recovery Projects.'' Since then a lot of research on foam in porous media has been done on the SUPRI project and a great deal of new information has appeared in the literature. Therefore we believed that a new, up-to-date search should be done on foam alone, one which would be helpful to our students and perhaps of interest to others. This is a chronological survey showing the development of foam flow, blockage and use in porous media, starting with laboratory studies and eventually getting into field tests and demonstrations. It is arbitrarily divided into five-year time periods. 81 refs.

Marsden, S.S.

1986-07-01T23:59:59.000Z

91

Relationship between casting distortion, mold filling, and interfacial heat transfer. Annual technical report, September 1997 - September 1998  

SciTech Connect

In the third year of this program, the final castings necessary to evaluate the effect of casting orientation and gating in silica sand lost foam were poured and measured using a CMM machine. Interfacial heat transfer and gap formation measurements continued. However, significant problems were encountered in making accurate measurements. No consistent evidence of gap formation was found in aluminum sand casting. Initial analysis yields heat transfer values below those previously reported in the literature. The program in continuing.

Woodbury, K.A.; Parker, J.K.; Piwonka, T.S.; Owusu, Y.

1998-10-22T23:59:59.000Z

92

Method of reducing the green density of a slip cast article  

DOE Patents (OSTI)

The method disclosed in this specification is one of reducing the green density of an article cast in a slip casting operation. The article is cast from a casting slip containing silicon metal particles, yttrium containing particles, and a small amount of a fluoride salt which is effective to suppress flocculation of the silicon metal particles by y.sup.+3 ions derived from the yttrium containing particles. The method is characterized by the following step. A small amount of compound which produces a cation which will partly flocculate the particles of silicon metal is added to the casting slip. The small amount of this compound is added so that when the casting slip is slip cast into a casting mold, the partly flocculated particles of silicon will interrupt an otherwise orderly packing of the particles of silicon and particles of yttrium. In this manner, the green density of the slip cast article is reduced and the article may be more easily nitrided.

Mangels, John A. (Flat Rock, MI); Dickie, Ray A. (Birmingham, MI)

1985-01-01T23:59:59.000Z

93

High cycle fatigue properties of aluminium foams  

SciTech Connect

Fatigue lifetime measurements have been performed on foamed Al-Mg-Si wrought alloys and Al-Si cast alloys in the high cycle range using an ultrasonic resonance testing method. The porous structure of the material is described by quantitative image analysis of optical micrographs and non destructively by X-ray computer tomography. The static mechanical properties as determined by tensile, compression and bending tests in earlier studies are used for material characterization in this paper. The evaluation of the stress main curves is specified for porous structures to obtain the stiffness and the plateau strength. The influence of the surface skin on the mechanical properties as well as an oscillation behavior during lifetime measurements was studied.

Zettl, B.E.; Stanzl-Tschegg, S.E. [Univ. of Agricultural Sciences (Austria). Inst. of Meteorology and Physics; Gradinger, R. [LKR-Centre of Competence on Light Metals, Ranshofen (Austria); Degischer, H.P. [Vienna Univ. of Technology (Austria). Inst. of Material Science

1998-12-31T23:59:59.000Z

94

Experimental evidence of foam homogenization  

SciTech Connect

The propagation of an ionization wave through a subcritical foam is studied under inertial confinement fusion conditions. Independent measurements of the ionization wave velocity are compared with hydrodynamic simulations and analytical models. It is shown that simulations of a homogeneous material at equivalent density strongly overestimate the front velocity. The internal foam structure can be accounted for with a simple model of foam homogenization that allows improving agreement between experiment and calculations.

Nicolaie, Ph.; Olazabal-Loume, M.; Tikhonchuk, V. [Univ. Bordeaux-CNRS-CEA, CELIA F-33405 Talence cedex (France); Fujioka, S.; Sunahara, A. [Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita Osaka 565-0871 (Japan); Borisenko, N.; Gus'kov, S.; Orekov, A. [P. N. Lebedev Physical Institute, RAS Leninskii Prospect 53, Moscow 119991 (Russian Federation); Grech, M. [Max-Planck-Institute for the Physics of Complex Systems, D-01187 Dresden (Germany); Riazuelo, G. [CEA, DAM, DIF, F-91297 Arpajon (France); Labaune, C. [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Palaiseau (France); Velechowski, J. [Czech Technical University in Prague, Technicka 2, 166 27 Prague 6 (Czech Republic); Univ. Bordeaux-CNRS-CEA, CELIA F-33405 Talence cedex (France)

2012-11-15T23:59:59.000Z

95

Polypropylene Foam Gains in Appeal  

Science Journals Connector (OSTI)

Wire and cable manufacturers show interest in this product as an insulator for coaxial cable ... The initial market growth for polypropylene foam is as insulation for coaxial cable. ... Boston Insulated Wire & Cable Co. is presently the only commercial producer of foamed polypropylene coaxial cable. ...

1964-06-15T23:59:59.000Z

96

High temperature lightweight foamed cements  

DOE Patents (OSTI)

Cement slurries are disclosed which are suitable for use in geothermal wells since they can withstand high temperatures and high pressures. The formulation consists of cement, silica flour, water, a retarder, a foaming agent, a foam stabilizer, and a reinforcing agent. A process for producing these cements is also disclosed. 3 figs.

Sugama, Toshifumi.

1989-10-03T23:59:59.000Z

97

Heat transfer at the mold-metal interface in permanent mold casting of aluminum alloys project. Quarterly project status report, January 1, 1998--March 31, 1998  

SciTech Connect

There have been numerous developments in the current project over the last three months. The most appropriate geometries for performing the interfacial heat transfer studies have been discussed with both of our Industrial Partners. Both companies have molds which may be available for adaptation to record the thermal history during casting required for determining interfacial heat transfer coefficients. The details of what instrumentation would be the most appropriate remain to be worked out, but the instrumentation would likely include thermocoupling in the mold cavity as well as in the mold wall, as well as pressure sensors in the squeeze casting geometry molds and ultrasonic gap monitoring in the low pressure and gravity fed permanent mold geometry molds. The first advisory committee meeting was held on February 6th, and the steering committee was apprised of the objectives of the program. The capabilities of the Industrial Partners were reviewed, as well as the need for the project to make use of resources from other CMC projects. The second full Advisory Committee Meeting will be held in early May.

Pehlke, R.D.; Hao, Shouwei; Cookson, J.M.

1998-03-31T23:59:59.000Z

98

Mechanical Characterization of Rigid Polyurethane Foams.  

SciTech Connect

Foam materials are used to protect sensitive components from impact loading. In order to predict and simulate the foam performance under various loading conditions, a validated foam model is needed and the mechanical properties of foams need to be characterized. Uniaxial compression and tension tests were conducted for different densities of foams under various temperatures and loading rates. Crush stress, tensile strength, and elastic modulus were obtained. A newly developed confined compression experiment provided data for investigating the foam flow direction. A biaxial tension experiment was also developed to explore the damage surface of a rigid polyurethane foam.

Lu, Wei-Yang

2014-12-01T23:59:59.000Z

99

Superplastic foaming of titanium and Ti-6Al-4V  

SciTech Connect

Solid-state foaming of metals can be achieved by hot-isostatic pressing of powders in presence of argon followed by expansion of the resulting high-pressure argon bubbles at ambient pressure and elevated temperature. This foaming technique was first demonstrated by Kearns et al. for Ti-6Al-4V, but is limited by its low creep rate and ductility, which lead to early cell wall fracture. The authors address these issues by performing the foaming step under superplastic conditions. Rather than using microstructural superplasticity (requiring fine grains which are difficult to achieve in porous powder-metallurgy materials), they used transformation superplasticity, which occurs at all grain sizes by biasing with a deviatoric stress (from the pore pressure) of internal stresses (from the allotropic mismatch during thermal cycling about the allotropic temperature range). As compared to control experiments performed under isothermal creep conditions, superplastic foaming under temperature cycling of unalloyed titanium and alloyed Ti-6Al-4V led to a significantly higher pore volume fraction and higher foaming rate.

Dunand, D.C. [Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Teisen, J. [Swiss Federal Inst. of Tech., Zuerich (Switzerland). Dept. of Materials

1998-12-31T23:59:59.000Z

100

Process and apparatus for casting multiple silicon wafer articles  

DOE Patents (OSTI)

Method and apparatus of casting silicon produced by the reaction between SiF.sub.4 and an alkaline earth metal into thin wafer-shaped articles suitable for solar cell fabrication.

Nanis, Leonard (Palo Alto, CA)

1992-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Microcellular foams via phase separation  

SciTech Connect

A study of wide variety of processes for making plastic foams shows that phase separation processes for polymers from solutions offers the most viable methods for obtaining rigid plastic foams which met the physical requirements for fusion target designs. Four general phase separation methods have been shown to give polymer foams with densities less than 0.1 g/cm/sup 3/ and cell sizes of 30..mu..m or less. These methods involve the utilization of non-solvent, chemical or thermal cooling processes to achieve a controlled phase separation wherein either two distinct phases are obtained where the polymer phase is a continuous phase or two bicontinuous phases are obtained where both the polymer and solvent are interpenetrating, continuous, labyrinthine phases. Subsequent removal of the solvent gives the final foam structure.

Young, A.T.

1985-01-01T23:59:59.000Z

102

Process for making carbon foam  

DOE Patents (OSTI)

The process obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications.

Klett, James W. (Knoxville, TN)

2000-01-01T23:59:59.000Z

103

Foam shell project: Progress report  

SciTech Connect

The authors report on their work to produce a foam shell target for two possible applications: (1) as liquid-layered cryogenic target on Omega Upgrade, and (2) as a back-up design for the NIF. This target consists of a roughly 1 mm diameter and 100 {mu}m thick spherical low-density foam shell surrounding a central void. The foam will be slightly overfilled with liquid D{sub 2} or DT, the overfilled excess being symmetrically distributed on the inside of the shell and supported by thermal gradient techniques. The outside of the foam is overcoated with full density polymer which must be topologically smooth. The technology for manufacturing this style of foam shell involves microencapsulation techniques and has been developed by the Japanese at ILE. Their goal is to determine whether this technology can be successfully adapted to meet US ICF objectives. To this end a program of foam shell development has been initiated at LLNL in collaboration with both the General Atomics DOE Target Fabrication Contract Corporation and the Target Fabrication Group at LLE.

Overturf, G.; Reibold, B.; Cook, B. [Lawrence Livermore National Lab., CA (United States); Schroen-Carey, D. [WJSA (United States)

1994-03-25T23:59:59.000Z

104

Mechanism of high energy absorption by foamed materials-foamed rigid polyurethane and foamed glass  

Science Journals Connector (OSTI)

Energy absorbability of foamed rigid materials, polyurethane and glass, was studied under a compressive load. The brittle materials were proved to absorb much energy in a manner similar to ductile materials. A me...

Toshio Kurauchi; Norio Sato; Osami Kamigaito

1984-03-01T23:59:59.000Z

105

10 - Polymeric foam materials for insulation in buildings  

Science Journals Connector (OSTI)

Abstract: This chapter discusses polymeric foams used mainly for building insulation with a view to saving energy. It deals first with a brief foam history, the necessary materials for foam production, the polymers and the foaming (blowing) agents, and the foaming mechanism. It continues with the type of processing polymers for foam production and underlines the thermoplastic and thermosetting foams manufactured for the construction industry. It ends with foam main properties and future trends in the field of polymeric insulation materials.

D. Feldman

2010-01-01T23:59:59.000Z

106

Epoxy Foam Encapsulants: Processing and Dielectric Characterization  

SciTech Connect

The dielectric performance of epoxy foams was investigated to determine if such materials might provide advantages over more standard polyurethane foams in the encapsulation of electronic assemblies. Comparisons of the dielectric characteristics of epoxy and urethane encapsulant foams found no significant differences between the two resin types and no significant difference between as-molded and machined foams. This study specifically evaluated the formulation and processing of epoxy foams using simple methylhydrosiloxanes as the flowing agent and compared the dielectric performance of those to urethane foams of similar density.

Linda Domeier; Marion Hunter

1999-01-01T23:59:59.000Z

107

Biopolymer foams - Relationship between material characteristics and foaming behavior of cellulose based foams  

SciTech Connect

Biopolymers are becoming increasingly important to both industry and consumers. With regard to waste management, CO{sub 2} balance and the conservation of petrochemical resources, increasing efforts are being made to replace standard plastics with bio-based polymers. Nowadays biopolymers can be built for example of cellulose, lactic acid, starch, lignin or bio mass. The paper will present material properties of selected cellulose based polymers (cellulose propionate [CP], cellulose acetate butyrate [CAB]) and corresponding processing conditions for particle foams as well as characterization of produced parts. Special focus is given to the raw material properties by analyzing thermal behavior (differential scanning calorimetry), melt strength (Rheotens test) and molecular weight distribution (gel-permeation chromatography). These results will be correlated with the foaming behavior in a continuous extrusion process with physical blowing agents and underwater pelletizer. Process set-up regarding particle foam technology, including extrusion foaming and pre-foaming, will be shown. The characteristics of the resulting foam beads will be analyzed regarding part density, cell morphology and geometry. The molded parts will be tested on thermal conductivity as well as compression behavior (E-modulus, compression strength)

Rapp, F., E-mail: florian.rapp@ict.fraunhofer.de, E-mail: anja.schneider@ict.fraunhofer.de; Schneider, A., E-mail: florian.rapp@ict.fraunhofer.de, E-mail: anja.schneider@ict.fraunhofer.de [Fraunhofer Institute for Chemical Technology ICT (Germany); Elsner, P., E-mail: peter.elsner@ict.fraunhofer.de [Fraunhofer Institute for Chemical Technology ICT, Germany and Karlsruhe Institute of Technology KIT (Germany)

2014-05-15T23:59:59.000Z

108

Engineering the Quantum Foam  

E-Print Network (OSTI)

In 1990 Alcubierre, within the General Relativity model for space-time, proposed a scenario for `warp drive' faster than light travel, in which objects would achieve such speeds by actually being stationary within a bubble of space which itself was moving through space, the idea being that the speed of the bubble was not itself limited by the speed of light. However that scenario required exotic matter to stabilise the boundary of the bubble. Here that proposal is re-examined within the context of the new modelling of space in which space is a quantum system, viz a quantum foam, with on-going classicalisation. This model has lead to the resolution of a number of longstanding problems, including a dynamical explanation for the so-called `dark matter' effect. It has also given the first evidence of quantum gravity effects, as experimental data has shown that a new dimensionless constant characterising the self-interaction of space is the fine structure constant. The studies here begin the task of examining to what extent the new spatial self-interaction dynamics can play a role in stabilising the boundary without exotic matter, and whether the boundary stabilisation dynamics can be engineered; this would amount to quantum gravity engineering.

Reginald T. Cahill

2005-06-06T23:59:59.000Z

109

Assessment of Oxidation in Carbon Foam  

E-Print Network (OSTI)

Carbon foams exhibit numerous unique properties which are attractive for light weight applications such as aircraft and spacecraft as a tailorable material. Carbon foams, when exposed to air, oxidize at temperatures as low as 500-600 degrees Celsius...

Lee, Seung Min

2010-07-14T23:59:59.000Z

110

Aging Characteristics of Polyurethane Foam Insulation  

Science Journals Connector (OSTI)

Closed-cell polyurethane foam insulation displays a time-dependent thermal conductivity characteristic commonly known as aging. Freshly made foam has a relatively low thermal conductivity, which ... in order to e...

J. Navickas; R. A. Madsen

1977-01-01T23:59:59.000Z

111

Salvaged castings and methods of salvaging castings with defective cast cooling bumps  

DOE Patents (OSTI)

Castings for gas turbine parts exposed on one side to a high-temperature fluid medium have cast-in bumps on an opposite cooling surface side to enhance heat transfer. Areas on the cooling surface having defectively cast bumps, i.e., missing or partially formed bumps during casting, are coated with a braze alloy and cooling enhancement material to salvage the part.

Johnson, Robert Alan (Simpsonville, SC); Schaeffer, Jon Conrad (Greenville, SC); Lee, Ching-Pang (Cincinnati, OH); Abuaf, Nesim (Lincoln City, OR); Hasz, Wayne Charles (Pownal, VT)

2002-01-01T23:59:59.000Z

112

Carbon foam characterization tensile evaluation of carbon foam ligaments  

E-Print Network (OSTI)

of Gibson and Ashby [5], [6]. The materials they studied were a high purity alumina with relative densities ranging from 0.09 to 0.25, an alumina-mullite (0.08-0.23) and an alumina-10% zirconia (0.08-0.19). They used scanning electron micrographs... of foam microstructure have been developed to model the foam mechanical behavior where the deformation of the bulk sample is predicted by the deformation of the unit cell. The model most widely used is that of Gibson and Ashby which is represented as a...

Verdugo Rodriguez, Rogelio Alberto

2004-09-30T23:59:59.000Z

113

Foam vessel for cryogenic fluid storage  

DOE Patents (OSTI)

Cryogenic storage and separator vessels made of polyolefin foams are disclosed, as are methods of storing and separating cryogenic fluids and fluid mixtures using these vessels. In one embodiment, the polyolefin foams may be cross-linked, closed-cell polyethylene foams with a density of from about 2 pounds per cubic foot to a density of about 4 pounds per cubic foot.

Spear, Jonathan D (San Francisco, CA)

2011-07-05T23:59:59.000Z

114

Highly concentrated foam formulation for blast mitigation  

DOE Patents (OSTI)

A highly concentrated foam formulation for blast suppression and dispersion mitigation for use in responding to a terrorism incident involving a radiological dispersion device. The foam formulation is more concentrated and more stable than the current blast suppression foam (AFC-380), which reduces the logistics burden on the user.

Tucker, Mark D. (Albuquerque, NM); Gao, Huizhen (Albuquerque, NM)

2010-12-14T23:59:59.000Z

115

The properties of foams and lattices  

Science Journals Connector (OSTI)

...management, for thermal insulation, filtration and...material with a foam-like structure...becomes important in foams of low density intended for thermal insulation, which have a conductivity...management, for thermal insulation, filtration and...material with a foam-like structure...

2006-01-01T23:59:59.000Z

116

Process for epoxy foam production  

DOE Patents (OSTI)

An epoxy resin mixture with at least one epoxy resin of between approximately 60 wt % and 90 wt %, a maleic anhydride of between approximately 1 wt % and approximately 30 wt %, and an imidazole catalyst of less than approximately 2 wt % where the resin mixture is formed from at least one epoxy resin with a 1-30 wt % maleic anhydride compound and an imidazole catalyst at a temperature sufficient to keep the maleic anhydride compound molten, the resin mixture reacting to form a foaming resin which can then be cured at a temperature greater than 50.degree. C. to form an epoxy foam.

Celina, Mathias C. (Albuquerque, NM)

2011-08-23T23:59:59.000Z

117

Method of making a cyanate ester foam  

DOE Patents (OSTI)

A cyanate ester resin mixture with at least one cyanate ester resin, an isocyanate foaming resin, other co-curatives such as polyol or epoxy compounds, a surfactant, and a catalyst/water can react to form a foaming resin that can be cured at a temperature greater than 50.degree. C. to form a cyanate ester foam. The cyanate ester foam can be heated to a temperature greater than 400.degree. C. in a non-oxidative atmosphere to provide a carbonaceous char foam.

Celina, Mathias C.; Giron, Nicholas Henry

2014-08-05T23:59:59.000Z

118

Low density, microcellular foams, preparation, and articles  

DOE Patents (OSTI)

A microcellular low-density foam of poly(4-methyl-1-pentene) particularly useful for forming targets for inertial confinement fusion has been developed. Articles made from the foam have been machined to tolerances of 0.0001 inch, although the densities of the fragile foam are low (about 10 to about 100 mg/cc) and the cell sizes are small (about 10 to about 30 ..mu..m). Methods for forming the foam and articles are given. The yield strength of the foam of the invention is higher than was obtained in other structures of this same material.

Young, A.T.

1982-03-03T23:59:59.000Z

119

The Feasibility of Casting Sculpture in Kirksite  

E-Print Network (OSTI)

given to the various zinc die-casting alloys. Kirksite consists of 91 percent zinc, 4 percent aluminum, 4 percent copper, and 1 percent magnesium. It is a bluish- white metal commonly used commercially by the automobile industry in the production... of zinc extant is an idol found in a prehistoric Dacian settle- ment in Transylvania. This idol was alloyed with lead and had a I physical makeup resembling zinkstuhl, a modern zinc alloy. The ancients probably were unacquainted with zinc; however...

Fox, Lewis Howard

1968-01-01T23:59:59.000Z

120

Twin-belt continuous caster with containment and cooling of the exiting cast product for enabling high-speed casting of molten-center product  

DOE Patents (OSTI)

In continuously casting molten metal into cast product by a twin-belt machine, it is desirable to achieve dramatic increases in speed (linear feet per minute) at which cast product exits the machine, particularly in installations where steel cast product is intended to feed a downstream regular rolling mill (as distinct from a planetary mill) operating in tandem with the twin-belt caster. Such high-speed casting produces product with a relatively thin shell and molten interior, and the shell tends to bulge outwardly due to metallostatic head pressure of the molten center. A number of cooperative features enable high-speed, twin-belt casting: (1) Each casting belt is slidably supported adjacent to the caster exit pulley for bulge control and enhanced cooling of cast product. (2) Lateral skew steering of each belt provides an effective increase in moving mold length plus a continuity of heat transfer not obtained with prior art belt steering apparatus. (3) The exiting slab is contained and supported downstream from the casting machine to prevent bulging of the shell of the cast product, and (4) spray cooling is incorporated in the exit containment apparatus for secondary cooling of cast product.

Dykes, Charles D. (303 Shore Rd., Milton, VT); Daniel, Sabah S. (303 Shore Rd., Pittsburgh, PA); Wood, J. F. Barry (303 Shore Rd., Burlington, VT 05401)

1990-02-20T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

FOAM: NOVEL DELIVERY TECHNOLOGY FOR REMEDIATION OF VADOSE ZONE ENVIRONMENTS  

SciTech Connect

Deep vadose zone environments can be a primary source and pathway for contaminant migration to groundwater. These environments present unique characterization and remediation challenges that necessitate scrutiny and research. The thickness, depth, and intricacies of the deep vadose zone, combined with a lack of understanding of the key subsurface processes (e.g., biogeochemical and hydrologic) affecting contaminant migration, make it difficult to create validated conceptual and predictive models of subsurface flow dynamics and contaminant behavior across multiple scales. These factors also make it difficult to design and deploy sustainable remedial approaches and monitor long-term contaminant behavior after remedial actions. Functionally, the methods for addressing contamination must remove and/or reduce transport of contaminants. This problem is particularly challenging in the arid western United States where the vadose zone is hundreds of feet thick, rendering transitional excavation methods exceedingly costly and ineffective. Delivery of remedial amendments is one of the most challenging and critical aspects for all remedy-based approaches. The conventional approach for delivery is through injection of aqueous remedial solutions. However, heterogeneous deep vadose zone environments present hydrologic and geochemical challenges which limit the effectiveness. Because the flow of solution infiltration is dominantly controlled by gravity and suction, injected liquid preferentially percolates through highly permeable pathways, by-passing low-permeability zones which frequently contain the majority of contamination. Moreover, the wetting front can readily mobilize and enhance contaminant transport to the underlying aquifer prior to stabilization. Development of innovative, in-situ technologies may be the only way to meet remedial action objectives and long-term stewardship goals. Surfactants can be used to lower the liquid surface tension and create stabile foams, which readily penetrate low permeability zones. Although surfactant foams have been utilized for subsurface mobilization efforts in the oil and gas industry, so far, the concept of using foams as a delivery mechanism for transporting remedial amendments into deep vadose zone environments to stabilize metal and long-lived radionuclide contaminants has not been explored. Foam flow can be directed by pressure gradients, rather than being dominated by gravity; and, foam delivery mechanisms limit the volume of water (< 5% vol.) required for remedy delivery and emplacement, thus mitigating contaminant mobilization. We will present the results of a numerical modeling and integrated laboratory- / intermediate-scale investigation to simulate, develop, demonstrate, and monitor (i.e. advanced geophysical techniques and advanced predictive biomarkers) foam-based delivery of remedial amendments to remediate metals and radionuclides in vadose zone environments.

Jansik, Danielle P.; Wellman, Dawn M.; Mattigod, Shas V.; Zhong, Lirong; Wu, Yuxin; Foote, Martin; Zhang, Z. F.; Hubbard, Susan

2011-07-05T23:59:59.000Z

122

Extrusion cast explosive  

DOE Patents (OSTI)

Improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst are disclosed. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants.

Scribner, Kenneth J. (Livermore, CA)

1985-01-01T23:59:59.000Z

123

Blast mitigation capabilities of aqueous foam.  

SciTech Connect

A series of tests involving detonation of high explosive blanketed by aqueous foam (conducted from 1982 to 1984) are described in primarily terms of recorded peak pressure, positive phase specific impulse, and time of arrival. The investigation showed that optimal blast mitigation occurs for foams with an expansion ratio of about 60:1. Simple analyses representing the foam as a shocked single phase mixture are presented and shown inadequate. The experimental data demonstrate that foam slows down and broadens the propagated pressure disturbance relative to a shock in air. Shaped charges and flyer plates were evaluated for operation in foam and appreciable degradation was observed for the flyer plates due to drag created by the foam.

Hartman, William Franklin; Larsen, Marvin Elwood; Boughton, Bruce A.

2006-02-01T23:59:59.000Z

124

ENVIRONMENTALLY FRIENDLY PROCESSING OF POLYURETHANE FOAM FOR THERMAL INSULATION  

E-Print Network (OSTI)

ENVIRONMENTALLY FRIENDLY PROCESSING OF POLYURETHANE FOAM FOR THERMAL INSULATION CHANJOONG KIM was proposed and evaluated for the application of thermal insulation. For the production of polyurethane foam correspondence should be sent. #12;Key Words: Foam; Polyurethane; Thermal insulation; Nucleation; Growth

Kim, Chanjoong

125

Pitch-based carbon foam and composites  

DOE Patents (OSTI)

A process for producing carbon foam or a composite is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications.

Klett, James W. (Knoxville, TN)

2002-01-01T23:59:59.000Z

126

Pitch-based carbon foam and composites  

DOE Patents (OSTI)

A process for producing carbon foam or a composite is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications.

Klett, James W. (Knoxville, TN)

2001-01-01T23:59:59.000Z

127

Process for preparing silicon carbide foam  

DOE Patents (OSTI)

A method of preparing near net shape, monolithic, porous SiC foams is disclosed. Organosilicon precursors are used to produce polymeric gels by thermally induced phase separation, wherein, a sufficiently concentrated solution of an organosilicon polymer is cooled below its solidification temperature to form a gel. Following solvent removal from the gel, the polymer foam is pretreated in an oxygen plasma in order to raise its glass transition temperature. The pretreated foam is then pyrolyzed in an inert atmosphere to form a SiC foam. 9 figs.

Whinnery, L.L.; Nichols, M.C.; Wheeler, D.R.; Loy, D.A.

1997-09-16T23:59:59.000Z

128

Process for preparing silicon carbide foam  

DOE Patents (OSTI)

A method of preparing near net shape, monolithic, porous SiC foams is disclosed. Organosilicon precursors are used to produce polymeric gels by thermally induced phase separation, wherein, a sufficiently concentrated solution of an organosilicon polymer is cooled below its solidification temperature to form a gel. Following solvent removal from the gel, the polymer foam is pretreated in an oxygen plasma in order to raise its glass transition temperature. The pretreated foam is then pyrolized in an inert atmosphere to form a SiC foam.

Whinnery, LeRoy Louis (Livermore, CA); Nichols, Monte Carl (Livermore, CA); Wheeler, David Roger (Albuquerque, NM); Loy, Douglas Anson (Albuquerque, NM)

1997-01-01T23:59:59.000Z

129

Foam insulation for a liquid oxygen densifier  

Science Journals Connector (OSTI)

Analyses indicated that it would not be cost effective to vacuum insulate a 7 foot diameter by 30 foot long liquid nitrogen vessel for a launch facility liquid oxygen densifier. Foam insulation appeared to be the logical choice for this infrequently used ground support equipment but the history of foam problems due to cracking, adhesive failure and internal shearing weighed against the use of commercial spray-on material. These problems were solved with a system consisting of alternate sealing and flexible foam layers: (1) an inner membrane sealed to itself but not attached to the cold shell or pipe; (2) a flexible foam insulation layer; (3) a vapor-tight sealing membrane; (4) a second flexible foam insulation layer and (5) an outer aluminized sealing membrane. The second and subsequent layers are sealed to each underlying layer by flexible foam contact adhesive. The inner sealing membrane is particularly vital in that it allows the first foam layer to expand and contract as the tank temperature changes and it also protects the tank from chloride corrosion from the foam. This paper describes preliminary testing to prove out the system and the steps taken to install flexible foam insulation on the oxygen densifier vessel.

G.E. McIntosh; R. Stuckenschmidt

2012-01-01T23:59:59.000Z

130

Development and Optimization of Polyurea Foam  

Science Journals Connector (OSTI)

This foam block could be sliced into panels, which presented attractive properties as an insulation material. Especially their flexibility, which is...

Dr H. S. Creyf

1980-01-01T23:59:59.000Z

131

Alloy Foam Diesel Emissions Control School Bus Implementation...  

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

Alloy Foam Diesel Emissions Control School Bus Implementation Alloy Foam Diesel Emissions Control School Bus Implementation Poster presentation from the 2007 Diesel...

132

Extrusion cast explosive  

DOE Patents (OSTI)

Improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst are disclosed. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-01-29T23:59:59.000Z

133

Extrusion cast explosive  

DOE Patents (OSTI)

Disclosed is an improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-11-26T23:59:59.000Z

134

The Crystallization Behavior of Porous PLA Prepared by Modified Solvent Casting/Particulate Leaching Technique for Potential Use of Tissue Engineering Scaffold  

E-Print Network (OSTI)

The porous PLA foams potential for tissue engineering usage are prepared by a modified solvent casting/particulate leaching method with different crystallinity. Since in typical method the porogens are solved in the solution and flow with the polymers during the casting and the crystallinity behavior of PLA chains in the limited space cannot be tracked, in this work the processing is modified by diffusing the PLA solution into a steady salt stack. With a thermal treatment before leaching while maintaining the stable structure of the porogens stack, the crystallinity of porous foams is made possible to control. The characterizations indicate the crystallization of porous foams is in a manner of lower crystallibility than the bulk materials. Pores and caves of around 250{\\mu}m size are obtained in samples with different crystallinity. The macro-structures are not much impaired by the crystallization nevertheless the morphological effect of the heating process is still obvious.

Ran Huang; Xiaomin Zhu; Haiyan Tu; Ajun Wan

2014-04-14T23:59:59.000Z

135

NETL: News Release - DOE Transfers Steel Casting Technology to Rock Island  

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

31, 2007 31, 2007 DOE Transfers Steel Casting Technology to Rock Island Arsenal Army Facility to Produce Improved Armor in War on Terrorism WASHINGTON, DC - A steel casting technology developed by the U.S. Department of Energy has been transferred to the U.S. Army's Rock Island Arsenal to manufacture improved armor for vehicles used in the global war on terrorism. MORE INFO Learn more about NETL's cooperative research with the Army The Office of Fossil Energy's National Energy Technology Laboratory (NETL) provided the Rock Island Arsenal with process guidelines, parameters, expertise, and patterns to set up and operate a facility for making steel castings using an NETL-developed process called loose-bonded sand, lost-foam technology. The facilities at the arsenal, in Rock Island, Ill.,

136

Evaluating the bonding condition of NASA spray on foam insulation (SOFI) using audio frequency sound absorption measurements  

Science Journals Connector (OSTI)

The bonding condition of the spray on foam insulation (SOFI) used to insulate the external tank of the NASA space shuttle can be found by using the audio frequency sound absorption coefficient. The ASTM E1050 standard method for sound absorptionmeasurements was used with an open?ended 1?in?diam cast acrylic impedance tube sealed to the SOFI with closed cell PVC foam. Two artificially disbonded locations measuring 1.0 in. by 5.5 in. by 0.0625 in. and 2.0 in. by 8.0 in. by 0.0625 in. were detected by peaks in the sound absorption coefficient spectrum. The peaks in the sound absorptionspectrum between 1000 and 4000 Hz were 25% to 50% higher over disbonded areas when compared to bonded locations. The maximum and minimum sound absorption levels for the foam ranged between approximately 0.1 and 0.3. The entire sample was scanned using the sound absorption peaks as indicators. Samples of 2?in.?thick polystyrene foam were used with different sized defects at different locations in the foam to relate defect size and location to peaks in absorption coeffi?cient spectrum. [Work supported by NASA under Award No. NAG102098.

2005-01-01T23:59:59.000Z

137

Cast dielectric composite linear accelerator  

DOE Patents (OSTI)

A linear accelerator having cast dielectric composite layers integrally formed with conductor electrodes in a solventless fabrication process, with the cast dielectric composite preferably having a nanoparticle filler in an organic polymer such as a thermosetting resin. By incorporating this cast dielectric composite the dielectric constant of critical insulating layers of the transmission lines of the accelerator are increased while simultaneously maintaining high dielectric strengths for the accelerator.

Sanders, David M. (Livermore, CA); Sampayan, Stephen (Manteca, CA); Slenes, Kirk (Albuquerque, NM); Stoller, H. M. (Albuquerque, NM)

2009-11-10T23:59:59.000Z

138

Method for extruding pitch based foam  

DOE Patents (OSTI)

A method and apparatus for extruding pitch based foam is disclosed. The method includes the steps of: forming a viscous pitch foam; passing the precursor through an extrusion tube; and subjecting the precursor in said extrusion tube to a temperature gradient which varies along the length of the extrusion tube to form an extruded carbon foam. The apparatus includes an extrusion tube having a passageway communicatively connected to a chamber in which a viscous pitch foam formed in the chamber paring through the extrusion tube, and a heating mechanism in thermal communication with the tube for heating the viscous pitch foam along the length of the tube in accordance with a predetermined temperature gradient.

Klett, James W. (Knoxville, TN)

2002-01-01T23:59:59.000Z

139

Vacuum insulation properties of phenolic foam  

Science Journals Connector (OSTI)

Characteristic properties of phenolic foam as the interstitial material of a vacuum insulation panel are investigated experimentally. For the measurement of effective thermal conductivity, a vacuum guarded hot plate (VGHP) apparatus is used and the conductivity is measured at various vacuum levels. Radiative properties are found using a Fourier transform infrared spectroscopy (FT-IR) device. Solid conductivity is estimated using the porosity of the foam. Effective thermal conductivity at high level of vacuum is measured to be 5mW/mK which is sum of solid conductivity (2.56mW/mK) and radiative conductivity (2.44mW/mK) with 5% of measurement uncertainty. The pore size of the foam is estimated to be 260?m using rarefied gas conduction theory. This ensures insulation performance of phenolic foam up to about 10?3atm. Other practical characteristics of phenolic foam as the VIP core material are also discussed.

Jongmin Kim; Jae-Hyug Lee; Tae-Ho Song

2012-01-01T23:59:59.000Z

140

Seal welded cast iron nuclear waste container  

DOE Patents (OSTI)

This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the mating plug and main body components of the package. The welding inserts might be bonded in place during casting of the package components. When the waste package closure weld is made, the most severe thermal effects of the process are restricted to the nickel-carbon insert material which is far better able to accommodate them than is cast iron. Use of nickel-carbon weld inserts should eliminate any need for pre-weld and post-weld heat treatments which are a problem to apply to nuclear waste packages. Although the waste package closure weld approach described results in a dissimilar metal combination, the relative surface area of nickel-to-iron, their electrochemical relationship, and the presence of graphite in both materials will act to prevent any galvanic corrosion problem.

Filippi, Arthur M. (Pittsburgh, PA); Sprecace, Richard P. (Murrysville, PA)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Augmented Foam Sculpting for Capturing 3D Models Michael R. Marner Bruce H. Thomas  

E-Print Network (OSTI)

Augmented Foam Sculpting for Capturing 3D Models Michael R. Marner Bruce H. Thomas University. A designer physically sculpts a 3D model from foam using a hand-held hot wire foam cut- ter. Both the foamD model from foam using a hand-held hot wire foam cutter. Both the foam and cutting tool are tracked

Thomas, Bruce

142

Understanding the Relationship Between Filling Pattern and Part Quality in Die Casting  

SciTech Connect

The overall objective of this research project was to investigate phenomena involved in the filling of die cavities with molten alloy in the cold chamber die-casting process. It has long been recognized that the filling pattern of molten metal entering a die cavity influences the quality of die-cast parts. Filling pattern may be described as the progression of molten metal filling the die cavity geometry as a function of time. The location, size and geometric configuration of points of metal entry (gates), as well as the geometry of the casting cavity itself, have great influence on filling patterns. Knowledge of the anticipated filling patterns in die-castings is important for designers. Locating gates to avoid undesirable flow patterns that may entrap air in the casting is critical to casting quality - as locating vents to allow air to escape from the cavity (last places to fill). Casting quality attributes that are commonly flow related are non-fills, poor surface finish, internal porosity due to trapped air, cold shuts, cold laps, flow lines, casting skin delamination (flaking), and blistering during thermal treatment.

Jerald Brevick; R. Allen Miller

2004-03-15T23:59:59.000Z

143

Building a home from foamtngara frog foam nest architecture and three-phase construction process  

Science Journals Connector (OSTI)

...2010 research-article Animal behaviour 1001 23 14 Building a home from foam-tungara frog foam nest architecture and three-phase...Data Supplement: Supplementary figures 1, 2 and 3 Building a home from foam--tungara frog foam nest architecture and three-phase...

2010-01-01T23:59:59.000Z

144

Rheology of nearly ideal 3d foams  

E-Print Network (OSTI)

We probe the complex rheology of nearly ideal 3d foam by flowing through a narrow column. The foams we investigate have large bubble size, to minimize the effects of coarsening, and are very dry. Foams of this type cannot be studied via conventional rheometry. The foam flows upward through a vertical rectangular column with a 4:1 cross-sectional aspect ratio, by bubbling gas through a soapy solution at the base of our apparatus. At the column's narrow surfaces are sticky boundaries, which create shear due to the zero velocity boundary condition. As expected, the flow profile between the adjacent slippery broad faces is flat, however the profile between the narrow, sticky faces exhibits a curved velocity profile that is dependent on gas flow rate. We are able to analyze a 2d velocity profile from a 3d bulk system. We employ particle image velocimetry to measure the strain rate, and compute the stress from the pressure drop along the channel, to investigate the local stress-strain relationships in a flowing foam. We find these dry foams to have a Hershel-Bulkley exponent of 0.21, which is significantly lower (more shear thinning) than other results shown in the literature for much wetter foams.

C. D. Jones; K. N. Nordstrom; D. J. Durian

2014-04-10T23:59:59.000Z

145

Ultra Large Castings For Lightweight Vehicle Structures  

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

Die Casting process for their potential to enable the production of aluminum and magnesium primary automotive cast structural components with consistent and predictable...

146

Strength scaling of brittle graphitic foam  

Science Journals Connector (OSTI)

...many different type of open- and closed-cell solids such as aerogels (Pekala et al. 1991), graphitic foams (Brezny & Green...mechanical properties and scaling law relationships for silica aerogels and their organic counterparts. Mater. Res. Soc. Symp...

2002-01-01T23:59:59.000Z

147

Fire spread in concealed foamed plastic insulation  

Science Journals Connector (OSTI)

A test program, jointly sponsored by the Society of the Plastics Industry of Canada and the National Research Council, examined the contribution of plastic foams to fire spread in buildings. The conditions und...

Dr. W. Taylor

1983-08-01T23:59:59.000Z

148

Reinforced Phenolic Foams for Thermal Insulation  

Science Journals Connector (OSTI)

The reported research is related to phenolic resins panels for thermal insulation. This research started from previous results on the fabrication of foams from powdered Novolaque phenolic resins without acid...

P. Dubois; C. Reinaudo; E. Morel; C. Chauvelier

1984-01-01T23:59:59.000Z

149

Math of Popping Bubbles in a Foam  

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

in which liquids mix or in the formation of solid foams such as those used to cushion bicycle helmets. Applying these equations, they used supercomputers at DOE's National Energy...

150

Generalized correlation for foam flow in tubes  

E-Print Network (OSTI)

GENERALIZED CORRELATION FOR FOAM FLOW IN TUBES A Thesis by CAROL LYNNETTE COTTER 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.... (December 1996) Carol Lynnette Cotter, B. S. , Texas A&M University Chair of Advisory Committee: Dr. Raymond W. Flumerfelt A novel experimental procedure to determine the behavior of foam flow in tubes is established. Using an approach developed...

Cotter, Carol Lynnette

2012-06-07T23:59:59.000Z

151

Application of Genetic Algorithms and Thermogravimetry to Determine the Kinetics of Polyurethane Foam in Smoldering Combustion  

E-Print Network (OSTI)

for modeling urethane foam insulation performance, Journalinsulation, upholstery, as well as sound and shock dampening materials. PU foam

Rein, Guillermo; Lautenberger, Chris; Fernandez-Pello, Carlos; Torero, Jose; Urban, David

2006-01-01T23:59:59.000Z

152

Micropore Characterization of Mesocellular Foam and Hybrid Organic Functional Mesocellular Foam Materials  

Science Journals Connector (OSTI)

Micropore Characterization of Mesocellular Foam and Hybrid Organic Functional Mesocellular Foam Materials ... The authors acknowledge the Australian Research Council (ARC) for the support of ARC Discovery Grant DP0451387 and access to infrastructure from the Particulate Fluids Processing Centre, a Special Research Centre of the ARC. ...

Sasha Boskovic; Anita J. Hill; Terry W. Turney; Geoffrey W. Stevens; Michelle L. Gee; Andrea J. OConnor

2009-12-01T23:59:59.000Z

153

Wick for metal vapor laser  

DOE Patents (OSTI)

An improved wick for a metal vapor laser is made of a refractory metal cylinder, preferably molybdenum or tungsten for a copper laser, which provides the wicking surface. Alternately, the inside surface of the ceramic laser tube can be metalized to form the wicking surface. Capillary action is enhanced by using wire screen, porous foam metal, or grooved surfaces. Graphite or carbon, in the form of chunks, strips, fibers or particles, is placed on the inside surface of the wick to reduce water, reduce metal oxides and form metal carbides.

Duncan, David B. (Livermore, CA)

1992-01-01T23:59:59.000Z

154

Characterization of Al-Mn particles in AZ91D investment castings  

SciTech Connect

Manganese is currently added to Mg-Al alloys in order to improve the corrosion behavior of cast components. A part of this manganese is dissolved in the magnesium matrix and the balance is found as fine Al(Mn,Fe) particles dispersed within castings. For AZ91D specimens prepared using the plaster mould investment casting process, these particles were observed in very large quantity at the surface of castings. These particles were characterized by scanning electron microscopy and electron probe microanalysis. It was found that they consist of Al{sub 8}Mn{sub 5} phase and that their morphology and size depend on local solidification conditions. Their presence at the surface of the castings is related to low solidification rates and reduced thermal gradients at the mould/metal interface.

Lun Sin, S. [Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec, Quebec, G1K 7P4 (Canada); Dube, D. [Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec, Quebec, G1K 7P4 (Canada)], E-mail: dominique.dube@gmn.ulaval.ca; Tremblay, R. [Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec, Quebec, G1K 7P4 (Canada)

2007-10-15T23:59:59.000Z

155

ITP Metal Casting: Energy and Environmental Profile of the U.S. Metal casting Industry  

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

The DOE's Office of Industrial Technologies has formed apartnership with the U.S. metalcasting industry to accelerate the development of technoloiges and processes that will improve the industry's energy efficiency and environmental performance.

156

ITP Metal Casting: A Vision for the U.S. Metal Casting Industry...  

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

defects. An appropriate blend of statistical, shop floor layout, computer numerical control, and scheduling techniques is not currently used to optimize operating...

157

ITP Metal Casting: A Vision for the U.S. Metal Casting Industry: 2002 and Beyond  

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

The U.S. metalcasting industry will exhibit increased strength, vitality and innovation, contributing to the nations economy and security.

158

Fabrication of thin-wall hollow nickel spheres and low density syntactic foams  

SciTech Connect

A process has been developed to fabricate thin-wall hollow spheres from conventional oxide powders at room temperature. The polymer- bonded powder shells are fired in air to sinter the walls, leaving the shells either impervious or porous. Alternatively, the oxide shells can be preferentially reduced to produce thin-wall hollow metal spheres which can be bonded together to produce an ultra light weight closed-cell foam. Processing and properties of this class of low density structures will be discussed.

Clancy, R.B.; Sanders, T.H. Jr.; Cochran, J.K.

1991-12-31T23:59:59.000Z

159

FOAM: Fast Ocean Atmosphere Model | Argonne National Laboratory  

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

FOAM: Fast Ocean Atmosphere Model FOAM: Fast Ocean Atmosphere Model FOAM: Fast Ocean Atmosphere Model FOAM is a fully coupled, mixed-resolution, general circulation model designed for high-throughput (simulated years per day) while still providing a good simulated mean climate and simulated variability. FOAM uses the combination of a low resolution (R15) atmosphere model, a highly efficient medium-resolution ocean model, and distributed memory parallel processing to achieve high throughput on relatively modest numbers of processors (16-64). The quality of the simulated climate compares well with higher resolution models. No flux corrections are used. FOAM's intended purpose is to study long-term natural variability in the climate system. FOAM is also well suited for paleoclimate applications. FOAM is highly

160

Bioresistance of Foam-Glass Crystal Materials to Filamentous Fungi  

Science Journals Connector (OSTI)

Foam-glass crystal (FGC) materials used for heat insulation obtained by the technology described in [7...] were chosen for the present study. It is known that foam glass is environmentally harmless and safe for ....

O. V. Kazmina; M. A. Dushkina; M. V. Chubik

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Effects of foamed plastic insulation on severity of room fires  

Science Journals Connector (OSTI)

The results of a series of full scale room burn experiments with foamed plastic insulation in two walls indicate that the severity ... appear to be increased by the addition of foamed plastic insulation.

K. K. Choi

1986-02-01T23:59:59.000Z

162

LCA Case Studies of Starch-Based Foam  

Science Journals Connector (OSTI)

The LDPE block/WBF was delivered to the company specialising in foam conversion (Foam Engineers Ltd., UK). Here the ... cut and converted to the shaped pieces of insulation for the final manufacture of the coolbo...

Miao Guo

2012-01-01T23:59:59.000Z

163

Foam target experiments with the PF-1000 plasma focus facility  

Science Journals Connector (OSTI)

This paper describes experiments on foam liners performed with the PF-1000 plasma focus facility. A streak camera has been used ... foam liner can be uniformly imploded by a plasma focus current sheath.

L. Karpinski; M. Scholz; J.G. Linhart

1999-09-01T23:59:59.000Z

164

Foam-buffered laser-matter interactions  

SciTech Connect

Recent experiments indicate that low-density foam buffer layers can significantly mitigate the perturbing effects of beam non-uniformities in direct drive laser-matter interactions. Results of a computational study with a 2D ALE code are reported here. Typical targets consisted of 50 {mu}m of 50mg/cm{sup 3} C{sub 10}H{sub 8}O{sub 4} foam attached to a 10 {mu}m foil and covered with 250 {Angstrom} of gold. These targets were exposed to {approximately}1.2ns, flat topped, green light pulses at {approximately}1.4{times}10{sup 14}W/cm{sup 2} intensity, bearing 30 {mu}m lateral perturbations. Without the buffer layers the foils were severely disrupted after 1 ns of laser illumination. Buffering could provide stability for more than 2 ns of full shell acceleration. Our study shows that the high thermal conductivity of the foam results in flattened shocks in the foam plasma, communicating a smoothed laser drive to the accelerated shells. Preheat from the gold hastens conversion of solid foam to a heated plasma. {copyright} {ital 1997 American Institute of Physics.}

Mason, R.J.; Kopp, R.A.; Vu, H.X.; Wilson, D.C.; Goldman, S.R.; Watt, R.G. [Los Alamos National Laboratory, Los Alamos, New Mexico87545 (United States)] Willi, O. [The Blacket Laboratory, Imperial College of Science and Technology London, SW72Bz (United Kingdom)

1997-04-01T23:59:59.000Z

165

Foam-buffered laser-matter interactions  

SciTech Connect

Recent experiments indicate that low-density foam buffer layers can significantly mitigate the perturbing effects of beam non-uniformities in direct drive laser-matter interactions. Results of a computational study with a 2D ALE code are reported here. Typical targets consisted of 50 {mu}m of 50 mg/cm{sup 3} C{sub 10}H{sub 8}O{sub 4} foam attached to a 10 {mu}m foil and covered with 250 A of gold. These targets were exposed to {approx}1.2 ns, flat topped, green light pulses at {approx}1.4x10{sup 14} W/cm{sup 2} intensity, bearing 30 {mu}m lateral perturbations. Without the buffer layers the foils were severely disrupted after 1 ns of laser illumination. Buffering could provide stability for more than 2 ns of full shell acceleration. Our study shows that the high thermal conductivity of the foam results in flattened shocks in the foam plasma, communicating a smoothed laser drive to the accelerated shells. Preheat from the gold hastens conversion of solid foam to a heated plasma.

Mason, R. J.; Kopp, R. A.; Vu, H. X.; Wilson, D. C.; Goldman, S. R.; Watt, R. G. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Willi, O. [Blacket Laboratory, Imperial College of Science and Technology London, SW72Bz (United Kingdom)

1997-04-15T23:59:59.000Z

166

Foam-buffered laser-matter interactions  

SciTech Connect

Recent experiments indicate that low-density foam buffer layers can significantly mitigate the perturbing effects of beam non-uniformities in direct drive laser-matter interactions. Results of a computational study with a 2D ALE code are reported here. Typical targets consisted of 50 {micro}m of 50 mg/cm{sup 3} C{sub 10}H{sub 8}O{sub 4} foam attached to a 10 {micro}m foil and covered with 250 {angstrom} of gold. These targets were exposed to {approximately} 1.2 ns, flat topped, green light pulses at {approximately} 1.4 {times} 10{sup 14} W/cm{sup 2} intensity, bearing 30 {micro}m lateral perturbations. Without the buffer layers the foils were severely disrupted after 1 ns of laser illumination. Buffering could provide stability for more than 2 ns of full shell acceleration. This study shows that the high thermal conductivity of the foam results in flattened shocks in the foam plasma, communicating a smoothed laser drive to the accelerated shells. Preheat from the gold hastens conversion of solid foam to the smoothing heated plasma.

Mason, R.J.; Kopp, R.A.; Vu, H.X.; Wilson, D.C.; Goldman, S.R.; Watt, R.G.

1997-10-01T23:59:59.000Z

167

Fire-Induced Response in Foam Encapsulants  

SciTech Connect

The paper provides a concise overview of a coordinated experimental/theoretical/numerical program at Sandia National Laboratories to develop an experimentally validated model of fire-induced response of foam-filled engineered systems for nuclear and transportation safety applications. Integral experiments are performed to investigate the thermal response of polyurethane foam-filled systems exposed to fire-like heat fluxes. A suite of laboratory experiments is performed to characterize the decomposition chemistry of polyurethane. Mass loss and energy associated with foam decomposition and chemical structures of the virgin and decomposed foam are determined. Decomposition chemistry is modeled as the degradation of macromolecular structures by bond breaking followed by vaporization of small fragments of the macromolecule with high vapor pressures. The chemical decomposition model is validated against the laboratory data. Data from integral experiments is used to assess and validate a FEM foam thermal response model with the chemistry model developed from the decomposition experiments. Good agreement was achieved both in the progression of the decomposition front and the in-depth thermal response.

Borek, T.T.; Chu, T.Y.; Erickson, K.L.; Gill, W.; Hobbs, M.L.; Humphries, L.L.; Renlund, A.M.; Ulibarri, T.A.

1999-04-02T23:59:59.000Z

168

Dissipative flows of 2D foams  

E-Print Network (OSTI)

We analyze the flow of a liquid foam between two plates separated by a gap of the order of the bubble size (2D foam). We concentrate on the salient features of the flow that are induced by the presence, in an otherwise monodisperse foam, of a single large bubble whose size is one order of magnitude larger than the average size. We describe a model suited for numerical simulations of flows of 2D foams made up of a large number of bubbles. The numerical results are successfully compared to analytical predictions based on scaling arguments and on continuum medium approximations. When the foam is pushed inside the cell at a controlled rate, two basically different regimes occur: a plug flow is observed at low flux whereas, above a threshold, the large bubble migrates faster than the mean flow. The detailed characterization of the relative velocity of the large bubble is the essential aim of the present paper. The relative velocity values, predicted both from numerical and from analytical calculations that are discussed here in great detail, are found to be in fair agreement with experimental results.

Isabelle Cantat; Renaud Delannay

2005-07-21T23:59:59.000Z

169

Thermal Transport in High-Strength Polymethacrylimide (PMI) Foam Insulations  

Science Journals Connector (OSTI)

Thermal transport in high-strength polymethacrylimide (PMI) foam insulations is described, with special emphasis on the... $$3\\omega $$ ...

L. Qiu; X. H. Zheng; J. Zhu; D. W. Tang

2014-06-01T23:59:59.000Z

170

Multifunctional Corrosion-resistant Foamed Well Cement Composites  

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

Multifunctional Corrosion-resistant Foamed Well Cement Composites presentation at the April 2013 peer review meeting held in Denver, Colorado.

171

Experiments to Populate and Validate a Processing Model for Polyurethane Foam: Additional Data for Structural Foams.  

SciTech Connect

We are developing computational models to help understand manufacturing processes, final properties and aging of structural foam, polyurethane PMDI. Th e resulting model predictions of density and cure gradients from the manufacturing process will be used as input to foam heat transfer and mechanical models. BKC 44306 PMDI-10 and BKC 44307 PMDI-18 are the most prevalent foams used in structural parts. Experiments needed to parameterize models of the reaction kinetics and the equations of motion during the foam blowing stages were described for BKC 44306 PMDI-10 in the first of this report series (Mondy et al. 2014). BKC 44307 PMDI-18 is a new foam that will be used to make relatively dense structural supports via over packing. It uses a different catalyst than those in the BKC 44306 family of foams; hence, we expect that the reaction kineti cs models must be modified. Here we detail the experiments needed to characteriz e the reaction kinetics of BKC 44307 PMDI-18 and suggest parameters for the model based on these experiments. In additi on, the second part of this report describes data taken to provide input to the preliminary nonlinear visco elastic structural response model developed for BKC 44306 PMDI-10 foam. We show that the standard cu re schedule used by KCP does not fully cure the material, and, upon temperature elevation above 150 o C, oxidation or decomposition reactions occur that alter the composition of the foam. These findings suggest that achieving a fully cured foam part with this formulation may be not be possible through therma l curing. As such, visco elastic characterization procedures developed for curing thermosets can provide only approximate material properties, since the state of the material continuously evolves during tests.

Rao, Rekha R.; Celina, Mathias C.; Giron, Nicholas Henry; Long, Kevin Nicholas; Russick, Edward M.

2015-01-01T23:59:59.000Z

172

Math of Popping Bubbles in a Foam  

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

Math of Popping Math of Popping Bubbles in a Foam Math of Popping Bubbles in a Foam Berkeley Lab researchers mathematically describe the complex evolution and disappearance of foamy bubbles May 9, 2013 | Tags: Hopper, Math & Computer Science Media Contacts: UC Berkeley: Robert Sanders, rsanders@berkeley.edu, (510) 643-6998 Berkeley Lab: Linda Vu, lvu@lbl.gov, (510) 495-2404 Written By Robert Sanders Bubble baths and soapy dishwater, the refreshing head on a beer and the luscious froth on a cappuccino. All are foams, beautiful yet ephemeral as the bubbles pop one by one. Now, two researchers from the Department of Energy's (DOE's) Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California, Berkeley have described mathematically the successive stages in the complex evolution and disappearance of foamy

173

CFC alternatives for thermal insulation foams  

Science Journals Connector (OSTI)

Low density polymeric foam material expanded with chlorofluorocarbon (CFC) blowing agents have found widespread use as highly efficient thermal insulation materials in the construction, refrigeration appliance and transportation industries. The advent of regulations which are reducing the production and consumption of the fully halogenated \\{CFCs\\} for environmental reasons has prompted the development of environmentally acceptable substitutes for the CFC blowing agents. This paper summarizes the physical properties and performance of the leading alternatives for CFC-11, which is used to expand rigid polyurethane and polyisocyanurate foams, and the leading alternatives for CFC-12 which is used to expand extruded polystyrene board foam. Although the alternatives, HCFC-123 and HCFC-141b for CFC-11 and HCFC-142b and HCFC-124 for CFC-12, are not perfect matches from the performance viewpoint, they represent the optimum choice given the constraints on environmental acceptability, toxicity, flammability and performance.

Ian R Shankland

1990-01-01T23:59:59.000Z

174

Thermal radiative properties of phenolic foam insulation  

Science Journals Connector (OSTI)

Thermal insulation has long been an important subject in engineering. Foam insulations have become the most widely used insulations due to their low cost and ease of procesing. In recent years, phenolic foams find increasing applications because of their fire retardation. This paper presents experimental results of thermal radiative properties of phenolic foams, with or without activated carbon. Transmittance spectra were first taken using FTIR for samples of various densities. Extinction coefficient spectra were then obtained by applying Beer's law. Finally, by using the diffusion approximation, the Rosseland mean extinction coefficients and radiative thermal conductivities were obtained for various temperatures. Results show that the extinction coefficient increases with sample density. The addition of activated carbon increases the extinction coefficient slightly.

Chung-jen Tseng; Kuang-te Kuo

2002-01-01T23:59:59.000Z

175

Experiments for foam model development and validation.  

SciTech Connect

A series of experiments has been performed to allow observation of the foaming process and the collection of temperature, rise rate, and microstructural data. Microfocus video is used in conjunction with particle image velocimetry (PIV) to elucidate the boundary condition at the wall. Rheology, reaction kinetics and density measurements complement the flow visualization. X-ray computed tomography (CT) is used to examine the cured foams to determine density gradients. These data provide input to a continuum level finite element model of the blowing process.

Bourdon, Christopher Jay; Cote, Raymond O.; Moffat, Harry K.; Grillet, Anne Mary; Mahoney, James F. (Honeywell Federal Manufacturing and Technologies, Kansas City Plant, Kansas City, MO); Russick, Edward Mark; Adolf, Douglas Brian; Rao, Rekha Ranjana; Thompson, Kyle Richard; Kraynik, Andrew Michael; Castaneda, Jaime N.; Brotherton, Christopher M.; Mondy, Lisa Ann; Gorby, Allen D.

2008-09-01T23:59:59.000Z

176

Low density microcellular carbon foams and method of preparation  

DOE Patents (OSTI)

A low density, open-celled microcellular carbon foam is disclosed which is prepared by dissolving a carbonizable polymer or copolymer in a solvent, pouring the solution into a mold, cooling the solution, removing the solvent, and then carbonizing the polymer or copolymer in a high temperature oven to produce the foam. If desired, an additive can be introduced in order to produce a doped carbon foam, and the foams can be made isotropic by selection of a suitable solvent. The low density, microcellular foams produced by this process are particularly useful in the fabrication of inertial confinement fusion targets, but can also be used as catalysts, absorbents, and electrodes.

Arnold, Jr., Charles (Albuquerque, NM); Aubert, James H. (Albuquerque, NM); Clough, Roger L. (Albuquerque, NM); Rand, Peter B. (Albuquerque, NM); Sylwester, Alan P. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

177

Bending properties of foamed aluminum panels and sandwiches  

SciTech Connect

The foamed panels and sandwiches were prepared by powder metallurgical route using various matrix alloys. The effect of the apparent density, geometry and structure of the foam on its bending stiffness was studied with respect to the results of the four-point-bending. It has been shown that the modulus of elasticity of the foam cannot be related only to its apparent density, because the distribution of the cell-wall material along the thickness of the foamed panel is not uniform. Therefore the real moment of inertia of the foam`s cross-section should be used for the calculation of bending stiffness. This moment can be determined from the square weight of the foamed sample.

Simancik, F.; Kovacik, J.; Minarikova, N. [Inst. of Materials and Machine Mechanics, Bratislava (Slovakia)

1998-12-31T23:59:59.000Z

178

Experimental characterization of foam drainage and stability  

E-Print Network (OSTI)

generated from AOS, CD 1045, and SDS. These foams are stable under our experimental conditions (applied pressure difference = 3-7 psi). The critical concentrations for these surfactants are found to be 0.014, 0.04, and 0.06 wt % respectively. A theoretical...

Sheth, Vikas Rameshchandra

2012-06-07T23:59:59.000Z

179

Process development of thin strip steel casting  

SciTech Connect

An important new frontier is being opened in steel processing with the emergence of thin strip casting. Casting steel directly to thin strip has enormous benefits in energy savings by potentially eliminating the need for hot reduction in a hot strip mill. This has been the driving force for numerous current research efforts into the direct strip casting of steel. The US Department of Energy initiated a program to evaluate the development of thin strip casting in the steel industry. In earlier phases of this program, planar flow casting on an experimental caster was studied by a team of engineers from Westinghouse Electric corporation and Armco Inc. A subsequent research program was designed as a fundamental and developmental study of both planar and melt overflow casting processes. This study was arranged as several separate and distinct tasks which were often completed by different teams of researchers. An early task was to design and build a water model to study fluid flow through different designs of planar flow casting nozzles. Another important task was mathematically modeling of melt overflow casting process. A mathematical solidification model for the formation of the strip in the melt overflow process was written. A study of the material and conditioning of casting substrates was made on the small wheel caster using the melt overflow casting process. This report discusses work on the development of thin steel casting.

Sussman, R.C.; Williams, R.S.

1990-12-01T23:59:59.000Z

180

Super Building Insulation by CO2 Foaming Process Research Project |  

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

Emerging Technologies » Super Building Insulation by CO2 Foaming Emerging Technologies » Super Building Insulation by CO2 Foaming Process Research Project Super Building Insulation by CO2 Foaming Process Research Project The Department of Energy is currently researching the development of building superinsulation through a carbon dioxide (CO2) foaming process. Project Description This project seeks to develop building super insulation through a carbon dioxide foaming process that does not use hydrofluorocarbons (HFCs), and which produces insulation with a high R-value. Project Partners Research is being undertaken between the Department of Energy and The Industrial Science & Technology Network. Project Goals The goal of this project is to develop advanced insulation without HFC, and to achieve a competitive processing cost for CO2 foaming technology.

Note: This page contains sample records for the topic "foam metal casting" 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

Capillary Flow of Oil in a Single Foam Microchannel  

Science Journals Connector (OSTI)

When using appropriate surfactants, oil and aqueous foam can be intimately mixed without the foam being destroyed. In this Letter, we show that a foam, initially free of oil, can draw an oil drop under the action of capillary forces and stretch it through the aqueous network. We focus on the suction of oil by a single horizontal foam channel, known as a Plateau border. In such confined channels, imbibition dynamics are governed by a balance between capillarity and viscosity. Yet, the scaling law for our system differs from that of classical imbibition in porous media such as aqueous foam. This is due to the particular geometry of the liquid channels: Plateau borders filled with foaming solution are always concave whereas they can be convex or flat when filled with oil. Finally, the oil slug, confined in the Plateau border, fragments into droplets following a film breakup.

Keyvan Piroird and lise Lorenceau

2013-12-04T23:59:59.000Z

182

Thermal conductivity of rigid foam insulations for aerospace vehicles  

Science Journals Connector (OSTI)

The present work describes measurements of the effective thermal conductivity of NCFI 24-124 foam, a spray-on foam insulation used formerly on the Space Shuttle external fuel tank. A novel apparatus to measure the effective thermal conductivity of rigid foam at temperatures ranging from 20K to 300K was developed and used to study three samples of NCFI 24-124 foam insulation. In preparation for measurement, the foam samples were either treated with a uniquely designed moisture absorption apparatus or different residual gases to study their impact on the effective thermal conductivity of the foam. The resulting data are compared to other measurements and mathematical models reported in the literature.

M. Barrios; S.W. Van Sciver

2013-01-01T23:59:59.000Z

183

Enhancement of Energy Absorption in Syntactic Foams by Nanoclay Incorporation for Sandwich Core Applications  

Science Journals Connector (OSTI)

Syntactic foams are closed pore foams fabricated by the mechanical mixing of hollow glass particles in a matrix resin. The present study deals with change in compressive properties of syntactic foams due to th...

Nikhil Gupta; Rahul Maharsia

184

Joining of aluminium structures with aluminium foams  

SciTech Connect

The aim of this work is the evaluation of new construction elements for applications in transportation industry which are based on new designs incorporating commonly applied aluminium structures and aluminium foams. The work includes the characterization of the joining process, the joining mechanism and the mechanical properties of the joining zone. A testing method for the joints is developed which is based on a common tensile test in order to evaluate the influence of the main laser welding parameters on the toughness of the joints and to afford a comparison between laser beam welding and gluing process. The analysis of the joining mechanism is investigated with the help of metallographic studies. In addition, the energy absorption properties of aluminium hollows filled and joined with foam structures are characterized.

Burzer, J.; Bernard, T.; Bergmann, H.W. [Univ. of Bayreuth (Germany). Inst. for Materials Research

1998-12-31T23:59:59.000Z

185

Military housing foam application and analysis  

SciTech Connect

Sandia and Forest City have established a Cooperative Research and Development Agreement (CRADA), the partnership provides a unique opportunity to take technology research and development from demonstration to application in sustainable communities. This project consists of two activities conducted in Hawaii that focus on performance, integration and application of energy saving technologies. Hawaii has many energy challenges, making this location an excellent testbed for these activities. Under this project, spray foam technology was applied at military housing on Oahu and the consumption data collected. A cost benefit and operational analysis of the foam was completed. The second phase of this project included design, integration, and analysis of photovoltaic systems at a military community on Oahu. This phase of the project was conducted as part of Forest City's second Solar America Showcase Award.

Torres, J. J.

2012-03-01T23:59:59.000Z

186

Design of composite plastic foams for improved cushioning  

E-Print Network (OSTI)

. As shown in Appendix A, the three test foams for 28 this research are all nonlinear. Expanded polystyrene is a tangent-type material; polyurethane and polyethylene are anomalous-type materials. Tangent Type Anomalous Type U) (D U) Linear Type... group resins (polyester or polyether) . Poly- urethane foams are used frequently as cushioning materials because of their extremely resilient properties. For flexible foams, the polyols are primarily long- chain polyoxypropylene diols, with a small...

Eskew, James Oliver

1989-01-01T23:59:59.000Z

187

ENHANCEMENT OF STRUCTURAL FOAM MATERIALS BY INCORPORATION OF GASIFIER SLAG  

SciTech Connect

As advanced gasification technology is increasingly adopted as an energy source, disposal of the resulting slag will become a problem. We have shown that gasifier slag can be incorporated into foamed glass, which is currently being manufactured as an abrasive and as an insulating material. The slag we add to foamed glass does not simply act as filler, but improves the mechanical properties of the product. Incorporation of gasifier slag can make foamed glass stronger and more abrasion resistant.

Olin Perry Norton; Ronald A. Palmer; W. Gene Ramsey

2006-03-15T23:59:59.000Z

188

Thermal Energy Storage in Metal Foams filled with Paraffin Wax.  

E-Print Network (OSTI)

??Phase change materials (PCM) such as paraffin wax are known to exhibit slow thermal response due to their relatively low thermal conductivity. In this study, (more)

Vadwala, Pathik

2012-01-01T23:59:59.000Z

189

Geometry and foams: 2D dynamics and 3D statics  

Science Journals Connector (OSTI)

We discuss the implications of the classical Gauss-Bonnet formula to foam in two and three dimensions. For a two-dimensional foam it gives a generalization of the von Neumann law for the coarsening of foams to curved surfaces. As a consequence of this we find that the stability properties of stationary bubbles of such a froth depend on the Gaussian curvature of the surface. For three-dimensional foam we find a relation between the average Gaussian curvature of a soap film and the average number of vertices for each face.

Joseph E. Avron and Dov Levine

1992-07-06T23:59:59.000Z

190

Sticky foam as a less-than-lethal technology  

SciTech Connect

Sandia National Labs (SNL) in 1994 completed a project funded by the National Institute of Justice (NIJ) to determine the applicability of sticky foam for correctional applications. Sticky foam is an extremely tacky, tenacious material used to block, entangle, and impair individuals. The NIJ project developed a gun capable of firing multiple shots of sticky foam, tested the gun and sticky foam effectiveness on SNL volunteers acting out prison and law enforcement scenarios, and had the gun and sticky foam evaluated by correctional representatives. Based on the NIJ project work, SNL supported the Marine Corps Mission, Operation United Shield, with sticky foam guns and supporting equipment to assist in the withdrawal of UN Peacekeepers from Somalia. Prior to the loan of the equipment, the Marines were given training in sticky foam characterization, toxicology, safety issues, cleanup and waste disposal, use limitations, use protocol and precautions, emergency facial clean-up, skin cleanup, gun filling, targeting and firing, and gun cleaning. The Marine Corps successfully used the sticky foam guns as part of that operation. This paper describes these recent developments of sticky foam for non-lethal uses and some of the lessons learned from scenario and application testing.

Scott, S.H.

1996-12-31T23:59:59.000Z

191

Polyurethane rigid foam from soybean oil-based polyol.  

E-Print Network (OSTI)

??Polyurethane rigid foams are widely used as thermal insulation materials. The general route to make polyurethane is through the reaction between polyol and isocyanate. Blowing (more)

Tan, Suqin

2010-01-01T23:59:59.000Z

192

Material Characterization Of Rigid Foam Insulation For Aerospace Vehicles.  

E-Print Network (OSTI)

?? There is a continuing need for improved rigid foam insulation, particularly for cryogenic storage aboard aerospace vehicles. The present work is a material characterization (more)

Barrios, Matt

2011-01-01T23:59:59.000Z

193

Evaluation of the Transient Thermal Performance of a Graphite Foam/Phase Change Material Composite.  

E-Print Network (OSTI)

?? The thermal transient response of graphite foam infiltrated with paraffin wax as a thermal protection composite was investigated. Graphite foam is a rigid open-celled (more)

Trammell, Michael Paul

2013-01-01T23:59:59.000Z

194

Improving the Performance of Heat Insulation Polyurethane Foams by Silica Nanoparticles  

Science Journals Connector (OSTI)

Heat insulation polyurethane foam materials were doped by silica nano particles, ... , thermal and mechanical properties of polyurethane rigid foam were investigated. Thermal and mechanical properties were...

M. M. Alavi Nikje; A. Bagheri Garmarudi; M. Haghshenas

2009-01-01T23:59:59.000Z

195

E-Print Network 3.0 - aluminium foam fitted Sample Search Results  

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

aluminium foam under either... -cell 6101 aluminium foam in relation to its fracture ... Source: Groningen, Rijksuniversiteit - Centre for Ecological and Evolutionary...

196

Gating of Permanent Molds for ALuminum Casting  

SciTech Connect

This report summarizes a two-year project, DE-FC07-01ID13983 that concerns the gating of aluminum castings in permanent molds. The main goal of the project is to improve the quality of aluminum castings produced in permanent molds. The approach taken was determine how the vertical type gating systems used for permanent mold castings can be designed to fill the mold cavity with a minimum of damage to the quality of the resulting casting. It is evident that somewhat different systems are preferred for different shapes and sizes of aluminum castings. The main problems caused by improper gating are entrained aluminum oxide films and entrapped gas. The project highlights the characteristic features of gating systems used in permanent mold aluminum foundries and recommends gating procedures designed to avoid common defects. The study also provides direct evidence on the filling pattern and heat flow behavior in permanent mold castings.

David Schwam; John F. Wallace; Tom Engle; Qingming Chang

2004-03-30T23:59:59.000Z

197

SmartCast - Novel Textile Sensors for Embedded Pressure Sensing of Orthopedic Casts  

E-Print Network (OSTI)

J. Kaiser, Chair An orthopedic plaster or fiberglass cast is1 - Introduction 1.1 Background A plaster or fiberglass castunderstand how well a plaster or fiberglass cast fits over

Danilovic, Andrew

2013-01-01T23:59:59.000Z

198

Effect of Porosity on the Stiffness of Cast Steel RICHARD A. HARDIN and CHRISTOPH BECKERMANN  

E-Print Network (OSTI)

the location, amount, and size characteristics of micro- and macroporosity, an integrated design process service perfor- mance.[2] It is anticipated that such a design process will guide and improve inspection in cast metal due to porosity or inclusions are not considered directly in part design. Instead, ad

Beckermann, Christoph

199

Manual HVOF thermal spray repair of nickel aluminum bronze castings  

SciTech Connect

Manual high velocity oxyfuel (HVOF) thermal spray repairs were accomplished on a large nickel aluminum bronze propeller castings. The repairs were done on three different configurations of surface defects of up to 100 square inches and as deep as 90 mils. Nickel aluminum bronze alloy powder, sieve sized for the HVOF process, was sprayed. High quality, high coating density, repairs were achieved even on porous areas of the castings. Prior to performance of the repairs, a procedure was qualified in accordance with MIL-STD-1687 and a mock-up simulating the repair was produced. After HVOF spraying of the mock-up, the sprayed surface was sanded, milled, and drilled to determine how finishing of the actual castings would be done. After successful procedure qualification, the HVOF equipment was moved to the job site, metal masking was devised for the spray areas and grit blasting and manual HVOF spraying was done. Results of HVOF coating chemical analyses, bend tests, coating tensile bond strength tests, coating microscopic examinations, and mock-up evaluations are reported along with the spray procedures and techniques used in the repairs.

Brenna, R.T.; McCaw, R.L.; Pugh, J.L.

1994-12-31T23:59:59.000Z

200

Commercialization effort in support of electroslag-casting technology  

SciTech Connect

This report summarizes the results of an effort to revive interest in the electroslag casting (ESC) of components in the United States. The ESC process is an extension of a well established electroslag-remelting (ESR) process. Both processes use the electrode of a material that is continuously melted and cast in a water-cooled copper mold. For simple shapes, the mold can be movable, allowing the continuous casting of long lengths. In an effort to revive US industries` interest in ESC, the following approaches were taken: (1) US industries with prior experience in ESC or currently operating an ESR unit were contacted, followed up with telephone conversation, and/or sent copies of prior published reports on the topic, and, in some cases, personal visits were made; (2) with two companies, a potential interest in ESC was worked out by initially conducting ESR; and (3) to further strengthen the industrial interest, the newly developed iron-aluminide alloy, FA-129, was chosen as the material of choice for this study. The two industrial companies that worked with ORNL were Special Metals Corporation (New Hartford, New York) and Precision Rolled Products, Inc. (PRP) [Florham Park, New Jersey]. Even with its advantages, a survey of the industry indicated that ESC technology has a very limited chance of advancement in the United States. However, the processing of rounds and slabs by the ESR process is a well established commercial technology and will continue to expand. 16 figs, 3 tabs, 12 refs.

Sikka, V.K.

1993-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Nonaqueous composition for slip casting or cold forming refractory material into solid shapes  

SciTech Connect

A composition is described for slip casting or cold forming non-oxide refractory material(s) into solid shape comprising finely divided solid refractory materials selected from the group consisting of metal boride, refractory carbide, nitride, silicide and a refractory metal of tungsten, molybdenum, tantalum and chromium suspended in a nonaqueous liquid slip composition consisting essentially of a deflocculent composed of a vinyl chloride-vinyl acetate resin dissolved in an organic solvent.

Montgomery, L.C.

1993-08-24T23:59:59.000Z

202

Foams As Viewed by Small-Angle Neutron Scattering  

Science Journals Connector (OSTI)

Foams As Viewed by Small-Angle Neutron Scattering ... For wet foams, we met other difficulties, common to any strongly scattering system:? a part of the scattered beam is collected in the central cells along with the transmitted beam; this can spoil the transmission measurements. ...

Monique A. V. Axelos; Franois Bou

2003-07-04T23:59:59.000Z

203

Potpourri of Los Alamos National Laboratory foam efforts  

SciTech Connect

This presentation provides an update on microcellular foam research efforts at Los Alamos. Topics include the influence of pressure on the phase separation of poly(4-methyl-1-pentene) from organic solution, a new concept of phase diagrams, physical testing of foams, and recent emulsion polymerization results.

Williams, J.M.; Wilkerson, M.H.; Wrobleski, D.A.

1986-01-01T23:59:59.000Z

204

Periodic explosions by positive feedback in a rising foam column  

Science Journals Connector (OSTI)

...for a small outward heat flow from the foam to the containing wall. We also predict...explosions would be prevented by sufficient insulation between the foam and the surrounding wall. Such insulation could be provided by a thin film of high...

Clarence Zener; Jaime Noriega

1982-01-01T23:59:59.000Z

205

Recovery of flexible polyurethane foam from shredder residue.  

SciTech Connect

Argonne National Laboratory has developed a patented, continuous process for the recovery of flexible polyurethane foam (PUF) from auto shredder residue (ASR). To test the process, Argonne researchers conceived of, designed, and built a continuous foam washing and drying system that was pilot-tested at a shredder facility for six months. Economic analysis of the process, using manufacturers' quotes and operating data from Argonne's pilot plant, indicates a payback of less than two years for a plant producing about 1,000 ton/yr of foam. Samples of clean foam were shipped to three major foam reprocessors; all three indicated that the quality of the PUF recovered by the Argonne process met their requirements. Tests of the recovered foam by an independent testing laboratory showed that the recycled foam met the specifications for several automotive applications, including carpet padding, headliner, and sound-suppression support materials. Recovery of foam reduces the mass and the volume of material going to the landfill by about 5% and 30%, respectively. Annually, recovery will save about 1.2 x 10{sup 12} Btu of energy, cut the amount of solid waste being landfilled by about 150,000 tons, and eliminate the emission of about 250 tons of volatile organic compounds (VOCs) into the air.

Daniels, E. J.; Jody, b. J.

1999-06-29T23:59:59.000Z

206

Development of Foamed Emulsion Bioreactor for Air Pollution Control  

E-Print Network (OSTI)

Development of Foamed Emulsion Bioreactor for Air Pollution Control Eunsung Kan, Marc A. Deshusses used bioreactors for air pollution control. © 2003 Wiley Periodicals, Inc. Biotechnol Bioeng 84: 240­244, 2003. Keywords: VOC control; biofilter; air pollution control; toluene; biologically activated foam

207

Flux and the Continuous Casting of Steel  

Science Journals Connector (OSTI)

......removed by the cooling water. It is the loss of heat...in the space above the pool of liquid steel. Some...casting is cooled by water jets. The casting then...of liquid steel in the pooL The stage, from the...provided that the overall conservation of energy is satisfied......

D. R. BLAND

1984-01-01T23:59:59.000Z

208

RELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION  

E-Print Network (OSTI)

RELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION Richard Hardin1 , K.K. Choi1 , and Christoph 52242-1527 Keywords: Casting Process Design, Optimization, Reliability-Based Design Optimization purpose reliability-based design optimization (RBDO) software tool previously developed at the University

Beckermann, Christoph

209

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...

210

Ultra Large Castings for Lightweight Vehicle Structures ?AMD...  

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

Maryland. merit08mccarty6.pdf More Documents & Publications Ultra Large Castings For Lightweight Vehicle Structures Magnesium Powertrain Cast Components Project (AMD 304)...

211

Ultra Large Castings for Lightweight Vehicle Structures ?AMD...  

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

high volume casting process capable of producing large, thin-walled aluminum or magnesium castings.* HPDCs are not suitable for most primary automotive body structural...

212

Simulation of Distortion and Residual Stress Development During Heat Treatment of Steel Castings  

SciTech Connect

Heat treatment and associated processing, such as quenching, are critical during high strength steel casting production. These processes must be managed closely to prevent thermal and residual stresses that may result in distortion, cracking (particularly after machining), re-work, and weld repair. The risk of casting distortion limits aggressive quenching that can be beneficial to the process and yield an improved outcome. As a result of these distortions, adjustments must be made to the casting or pattern design, or tie bars must be added. Straightening castings after heat treatments can be both time-consuming and expensive. Residual stresses may reduce a casting???¢????????s overall service performance, possibly resulting in catastrophic failure. Stress relieving may help, but expends additional energy in the process. Casting software is very limited in predicting distortions during heat treatment, so corrective measures most often involve a tedious trial-and-error procedure. An extensive review of existing heat treatment residual stress and distortion modeling revealed that it is vital to predict the phase transformations and microstructure of the steel along with the thermal stress development during heat treatment. After reviewing the state-of-the-art in heat treatment residual stress and distortion modeling, an existing commercial code was selected because of its advanced capabilities in predicting phase transformations, the evolving microstructure and related properties along with thermal stress development during heat treatment. However, this software was developed for small parts created from forgings or machined stock, and not for steel castings. Therefore, its predictive capabilities for heat treatment of steel castings were investigated. Available experimental steel casting heat treatment data was determined to be of insufficient detail and breadth, and so new heat treatment experiments were designed and performed, casting and heat treating modified versions of the Navy-C ring (a classical test shape for heat treatment experiments) for several carbon and low alloy steels in order to generate data necessary to validate the code. The predicted distortions were in reasonable agreement with the experimentally measured values. However, the final distortions in the castings were small, making it difficult to determine how accurate the predictions truly are. It is recommended that further validation of the software be performed with the aid of additional experiments with large production steel castings that experience significant heat treatment distortions. It is apparent from this research that the mechanical properties of the bonded sand used for cores and sand molds are key in producing accurate stress simulation results. Because of this, experiments were performed to determine the temperature-dependent elastic modulus of a resin-bonded sand commonly utilized in the steel casting industry. The elastic modulus was seen to vary significantly with heating and cooling rates. Also, the retained room temperature elastic modulus after heating was seen to degrade significantly when the sand was heated above 125???????°C. The elastic modulus curves developed in this work can readily be utilized in casting simulation software. Additional experiments with higher heating rates are recommended to determine the behavior of the elastic modulus in the sand close to the mold-metal interface. The commercial heat treatment residual stress and distortion code, once fully validated, is expected to result in an estimated energy savings of 2.15 trillion BTU???¢????????s/year. Along with these energy savings, reduction of scrap and improvement in casting yield will result in a reduction of the environmental emissions associated with the melting and pouring of the metal which will be saved as a result of this technology.

Christoph Beckermann; Kent Carlson

2011-07-22T23:59:59.000Z

213

Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media  

SciTech Connect

Foam has the potential to effectively carry and distribute either aqueous or gaseous amendments to the deep vadose zone for contaminant remediation. However, the transport of foam in porous media is complicated because flow characteristics such as the effective viscosity are affected not only by foam properties but also by the sediment properties and flow conditions. We determined the average effective foam viscosity via a series of laboratory experiments and found that the effective foam viscosity increased with the liquid fraction in foam, the injection rate, and sediment permeability. These impacts are quantified with an empirical expression, which is further demonstrated with data from literature. The results show that the liquid fraction in foam and sediment permeability are two primary factors affecting effective foam viscosity. These results suggest that, when foam is used in deep vadose zone remediation, foam flow will not suffer from gravitational drainage and can distribute amendments uniformly in heterogeneous sediments.

Zhang, Z. F.; Zhong, Lirong; White, Mark D.; Szecsody, James E.

2012-11-01T23:59:59.000Z

214

A study on the oxidation characteristics of cast irons containing aluminum  

SciTech Connect

Isothermal-oxidation characteristics of cast irons containing aluminum (5-15% Al) from 700 to 1000{degrees}C in air have been studied. In addition to mass-gain measurements, the morphology and composition of the oxide scales have been examined by SEM-EDX system and XRD analysis. A normal Fe-5Al-C alloy does not develop protective, adherent scales. Even the addition of misch metal and calcium silicide to such an alloy does not improve its oxidation resistance. But aluminum cast iron develops considerable oxidation resistance only when a sufficient quantity of silicon is also present in the alloy. Treatment of the alloy with misch metal and calcium silicide together assists in protective scale formation. Among the alloys investigated Fe-15Al-Si-C treated with misch metal and calcium silicide shows minimum oxidation at 1000{degrees}C.

Ghosh, S.; Prodhan, A. [National Metallurigical Laboratory, Jamshedpur (India); Mohanty, O.N. [Tata Steel, Jamshedpur (India)] [and others

1996-02-01T23:59:59.000Z

215

FOAM DENSITY SENSITIVITY STUDY FOR THE 9977 PACKAGE  

SciTech Connect

Two layers of insulation fill the volume of the 9977 package between the drum liner and the shell. One of these layers is composed of General Plastics FR-3716 polyurethane foam (also known as Last-A-Foam{reg_sign}), poured through fill holes in the drum bottom and foamed in place. There was concern that the density of the foam insulating layer may vary due to the manufacturing process and that variations in foam density would compromise the safety basis of the package. Thus, a structural finite element analysis was performed to investigate this concern. The investigation examined the effect of replacing the material properties for the FR-3716 polyurethane foam, which has a density equal to 16 lb{sub m}/ft{sup 3}, with material properties of similar foam with varying densities through finite element analysis of hypothetical accident conditions (HAC) pertaining to impact conditions. The results showed that the functional performance of the containment vessel (CV) was not compromised under the conditions investigated.

Gorczyca, J; Tsu-Te Wu, T

2008-05-02T23:59:59.000Z

216

Surface effects on the radiation response of nanoporous Au foams  

SciTech Connect

We report on an experimental and simulation campaign aimed at exploring the radiation response of nanoporous Au (np-Au) foams. We find different defect accumulation behavior by varying radiation dose-rate in ion-irradiated np-Au foams. Stacking fault tetrahedra are formed when np-Au foams are irradiated at high dose-rate, but they do not seem to be formed in np-Au at low dose-rate irradiation. A model is proposed to explain the dose-rate dependent defect accumulation based on these results.

Fu, E. G.; Caro, M.; Wang, Y. Q.; Baldwin, K.; Caro, A. [Materials Science in Radiation and Dynamics Extremes, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Zepeda-Ruiz, L. A. [Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States); Bringa, E. [CONICET and Instituto de Ciencias Basicas, Universidad Nacional de Cuyo, Mendoza 5500 (Argentina); Nastasi, M. [Nebraska Center for Energy Sciences Research, University of Nebraska-Lincoln, Lincoln, Nebraska 68508 (United States)

2012-11-05T23:59:59.000Z

217

Gasification of waste rigid polyurethane foam: optimizing operational conditions  

Science Journals Connector (OSTI)

The influence of temperature and catalyst type on production of combustible gas during the air gasification of waste rigid polyurethane foam has been...16 (43...) of three parameters was employed to optimize the...

Xiaoya Guo; Lixin Wang; Shouguang Li

2014-07-01T23:59:59.000Z

218

Capillary flow of oil in a single foam microchannel  

E-Print Network (OSTI)

Under specific physico-chemical conditions, oil droplets are able to invade the liquid network of a foam without damaging it. We study experimentally the capillary suction of oil in a single foam channel, a Plateau border. Oil flows as an unbroken stream with a dynamics that differs from classical wicking in a capillary tube due to the deformability of the foam channel. The oil forms a long and stable liquid slug inside the Plateau border, which does not break into droplets as long as the oil is confined within the Plateau Border. Yet, destabilization occurs when oil is transferred from the Plateau border to a soap film, after the break-up of a soap film as may happen in real foams.

Piroird, Keyvan

2013-01-01T23:59:59.000Z

219

Heat transfer in open cell polyurethane foam insulation  

Science Journals Connector (OSTI)

This paper study systematic investigates the combined conductive and non-gray radiative heat transfer of open cell polyurethane (PU) foam in the pressure range between 760 and 0.02?Torr. Direct transmission m...

J.-W. Wu; H.-S. Chu

1998-11-01T23:59:59.000Z

220

A Structural Plastic Foam Thermal Insulation for Cryogenic Service  

Science Journals Connector (OSTI)

Today, with the impending energy crisis and the rush to construct LNG facilities as one method to alleviate the energy shortage, it is not surprising that we find plastic foams and other thermal insulating materi...

R. B. Bennett

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Fungi associated with urea-formaldehyde foam insulation in Canada  

Science Journals Connector (OSTI)

Sixty-eight fungal taxa were identified from samples of urea-formaldehyde foam insulation taken from Canadian residences. Mesophilic taxa were...Penicillium spp., Trichoderma harzianum and Paecilomyces variotii o...

John Bissett

1987-07-01T23:59:59.000Z

222

Polyurethane and Polyisocyanurate Foams in External Tank Cryogenic Insulation  

Science Journals Connector (OSTI)

External tanks of the spacecrafts need not only efficient, but also safe cryogenic insulation materials and the issues of their development ... , polyurethane (PUR) or polyisocyanurate (PIR) foams cryogenic insulation

U. Stirna; I. Beverte; V. Yakushin; U. Cabulis

2013-01-01T23:59:59.000Z

223

Spectroscopic diagnosis of foam z-pinch plasmas on SATURN  

Science Journals Connector (OSTI)

Solid and annular silicon aerogel and agar foams were imploded on the SATURN accelerator to study plasma initiation acceleration and stagnation. SATURN delivers 7 MA with a 50 ns rise time to these foam loads. We fielded several spectroscopic diagnostics to measureplasma parameters throughout the z-pinch discharge. A spatially resolved single frame time-gated extreme ultravioletspectrometermeasured the extent of plasma ablation off the surface of the foam. A time integrated crystal spectrometer showed that characteristicK shell radiation of silicon in the aerogel and of sulfur and sodium impurities in the agar were attenuated when the foam loads were coated with a conductive layer of gold. A time-resolved pinhole camera showed that in general the quality of the pinch implosions was poor but improved with increasing efforts to improve current continuity such as prepulse and conductive coatings.

T. J. Nash; M. S. Derzon; G. Allshouse; D. Jobe; J. Seaman; T. Gilliland; J. McGurn; J. J. MacFarlane; P. Wang

1997-01-01T23:59:59.000Z

224

Sidewall containment of liquid metal with vertical alternating magnetic fields  

DOE Patents (OSTI)

An apparatus is disclosed for containing molten metal using a magnet producing vertical alternating magnetic field positioned adjacent the area in which the molten metal is to be confined. This invention can be adapted particularly to the casting of metal between counter-rotating rollers with the vertical alternating magnetic field used to confine the molten metal at the edges of the rollers. Alternately, the vertical alternating magnetic field can be used as a flow regulator in casting molten metal from an opening in a channel. 9 figs.

Lari, R.J.; Praeg, W.F.; Turner, L.R.; Battles, J.E.; Hull, J.R.; Rote, D.M.

1990-12-04T23:59:59.000Z

225

Sidewall containment of liquid metal with vertical alternating magnetic fields  

DOE Patents (OSTI)

An apparatus for containing molten metal using a magnet producing vertical alternating magnetic field positioned adjacent to the area in which the molten metal is to be confined. This invention can be adapted particularly to the casting of metal between counter-rotating rollers with the vertical alternating magnetic field used to confine the molten metal at the edges of the rollers. Alternately, the vertical alternating magnetic field can be used as a flow regulator in casting molten metal from an opening in a channel. 8 figs.

Lari, R.J.; Praeg, W.F.; Turner, L.R.; Battles, J.E.; Hull, J.R.; Rote, D.M.

1988-06-17T23:59:59.000Z

226

Observation of ionization fronts in low density foam targets  

SciTech Connect

Ionization fronts have been observed in low density chlorinated foam targets and low density foams confined in gold tubes using time resolved {ital K}-shell absorption spectroscopy. The front was driven by an intense pulse of soft x-rays produced by high power laser irradiation. The density and temperature profiles inferred from the radiographs provided detailed measurement of the conditions. The experimental data were compared to radiation hydrodynamics simulations and reasonable agreement was obtained. {copyright} {ital 1999 American Institute of Physics.}

Hoarty, D. [Imperial College of Science, Technology and Medicine, London (United Kingdom)] [Imperial College of Science, Technology and Medicine, London (United Kingdom); [Radiation Physics Department, AWE Aldermaston, Reading, Berkshire (United Kingdom); Willi, O.; Barringer, L.; Vickers, C. [Imperial College of Science, Technology and Medicine, London (United Kingdom)] [Imperial College of Science, Technology and Medicine, London (United Kingdom); Watt, R. [P24, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [P24, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Nazarov, W. [Chemistry Department, University of Dundee (United Kingdom)] [Chemistry Department, University of Dundee (United Kingdom)

1999-05-01T23:59:59.000Z

227

Experimental Study of a New PVC Foam Insulation System for Liquid-Hydrogen-Liquid-Oxygen Space Vehicles  

Science Journals Connector (OSTI)

This paper discusses the development of a rigid external foam insulation for liquid-hydrogen-liquid-oxygen space vehicles...1...], dealing with the use of Klegecell G 300,* a PVC closed-cell foam. This foam does ...

F. J. Muller

1971-01-01T23:59:59.000Z

228

GRAIN REFINEMENT OF PERMANENT MOLD CAST COPPER BASE ALLOYS  

SciTech Connect

Grain refinement behavior of copper alloys cast in permanent molds was investigated. This is one of the least studied subjects in copper alloy castings. Grain refinement is not widely practiced for leaded copper alloys cast in sand molds. Aluminum bronzes and high strength yellow brasses, cast in sand and permanent molds, were usually fine grained due to the presence of more than 2% iron. Grain refinement of the most common permanent mold casting alloys, leaded yellow brass and its lead-free replacement EnviroBrass III, is not universally accepted due to the perceived problem of hard spots in finished castings and for the same reason these alloys contain very low amounts of iron. The yellow brasses and Cu-Si alloys are gaining popularity in North America due to their low lead content and amenability for permanent mold casting. These alloys are prone to hot tearing in permanent mold casting. Grain refinement is one of the solutions for reducing this problem. However, to use this technique it is necessary to understand the mechanism of grain refinement and other issues involved in the process. The following issues were studied during this three year project funded by the US Department of Energy and the copper casting industry: (1) Effect of alloying additions on the grain size of Cu-Zn alloys and their interaction with grain refiners; (2) Effect of two grain refining elements, boron and zirconium, on the grain size of four copper alloys, yellow brass, EnviroBrass II, silicon brass and silicon bronze and the duration of their effect (fading); (3) Prediction of grain refinement using cooling curve analysis and use of this method as an on-line quality control tool; (4) Hard spot formation in yellow brass and EnviroBrass due to grain refinement; (5) Corrosion resistance of the grain refined alloys; (6) Transfer the technology to permanent mold casting foundries; It was found that alloying elements such as tin and zinc do not change the grain size of Cu-Zn alloys. Aluminum promoted b phase formation and modified the grain structure from dendritic to equiaxed. Lead or bismuth reduces the size of grains, but not change the morphology of the structure in Cu-Zn alloys. The grain size of the Cu-Zn-alloy can be reduced from 3000 mm to 300 mm after the addition of aluminum and lead. Similar effects were observed in EnviroBrass III after the addition of aluminum and bismuth. Boron refined the structure of yellow brasses in the presence of iron. At least 50 ppm of iron and 3 ppm of boron are necessary to cause grain refinement in these alloys. Precipitation of iron from the melt is identified as the cause of grain refinement. Boron initiates the precipitation of iron which could not be explained at this time. On the other hand zirconium causes some reduction in grain size in all four alloys investigated. The critical limit for the zirconium was found to be around 100 ppm below which not much refinement could be observed. The mechanism of grain refinement in the presence of zirconium could not be explained. Grain refinement by boron and iron can remain over a long period of time, at least for 72 hours of holding or after remelting few times. It is necessary to have the iron and boron contents above the critical limits mentioned earlier. On the other hand, refinement by zirconium is lost quite rapidly, some times within one hour of holding, mostly due to the loss of zirconium, most probably by oxidation, from the melt. In all the cases it is possible to revive the refinement by adding more of the appropriate refining element. Cooling curve analysis (thermal analysis) can be used successfully to predict the grain refinement in yellow brasses. The precipitation of iron in the liquid metal causes the metal to solidify without undercooling. Absence of this reaction, as indicated by the time-temperature (t-T) and its first derivative (dt/dT) curves, proved to be an indicator of refinement. The viability of the technique as an on-line quality control tool was proved in two foundries. The method can also correctly predict the onset of fading. Th

M. SADAYAPPAN, J.P. THOMSON, M.ELBOUJDAINI, G. PING GU, M. SAHOO

2004-04-29T23:59:59.000Z

229

ITP Metal Casting: Corrosion Testing Practices ? High Alloy...  

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

Office of Energy Efficiency and Renewable Energy INDUSTRIAL TECHNOLOGIES PROGRAM Corrosion Testing Practices - High Alloy Corrosion Program This subtask under ESMARRT Material...

230

Reliability Tools for Resonance Inspection of Light Metal Castings  

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

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

231

Enhanced Resonance Inspection for Light Metal Castings | Department...  

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

Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. lm027sun2010o.pdf More Documents & Publications FY 2009 Progress Report for Lightweighting...

232

Modeling and Optimization of Direct Chill Casting to Reduce Ingot Cracking  

SciTech Connect

Approximately 68% of the aluminum produced in the United States is first cast into ingots prior to further processing into sheet, plate, extrusions, or foil. The direct chill (DC) semi-continuous casting process has been the mainstay of the aluminum industry for the production of ingots due largely to its robust nature and relative simplicity. Though the basic process of DC casting is in principle straightforward, the interaction of process parameters with heat extraction, microstructural evolution, and development of solidification stresses is too complex to analyze by intuition or practical experience. One issue in DC casting is the formation of stress cracks [1-15]. In particular, the move toward larger ingot cross-sections, the use of higher casting speeds, and an ever-increasing array of mold technologies have increased industry efficiencies but have made it more difficult to predict the occurrence of stress crack defects. The Aluminum Industry Technology Roadmap [16] has recognized the challenges inherent in the DC casting process and the control of stress cracks and selected the development of 'fundamental information on solidification of alloys to predict microstructure, surface properties, and stresses and strains' as a high-priority research need, and the 'lack of understanding of mechanisms of cracking as a function of alloy' and 'insufficient understanding of the aluminum solidification process', which is 'difficult to model', as technology barriers in aluminum casting processes. The goal of this Aluminum Industry of the Future (IOF) project was to assist the aluminum industry in reducing the incidence of stress cracks from the current level of 5% to 2%. Decreasing stress crack incidence is important for improving product quality and consistency as well as for saving resources and energy, since considerable amounts of cast metal could be saved by eliminating ingot cracking, by reducing the scalping thickness of the ingot before rolling, and by eliminating butt sawing. Full-scale industrial implementation of the results of the proposed research would lead to energy savings in excess of 6 trillion Btu by the year 2020. The research undertaken in this project aimed to achieve this objective by a collaboration of industry, university, and national laboratory personnel through Secat, Inc., a consortium of aluminum companies. During the four-year project, the industrial partners and the research team met in 16 quarterly meetings to discuss research results and research direction. The industrial partners provided guidance, facilities, and experience to the research team. The research team went to two industrial plants to measure temperature distributions in commercial 60,000-lb DC casting ingot production. The project focused on the development of a fundamental understanding of ingot cracking and detailed models of thermal conditions, solidification, microstructural evolution, and stress development during the initial transient in DC castings of the aluminum alloys 3004 and 5182. The microstructure of the DC casting ingots was systematically characterized. Carefully designed experiments were carried out at the national laboratory and university facilities as well as at the industrial locations using the industrial production facilities. The advanced computational capabilities of the national laboratories were used for thermodynamic and kinetic simulations of phase transformation, heat transfer and fluid flow, solidification, and stress-strain evolution during DC casting. The achievements of the project are the following: (1) Identified the nature of crack formation during DC casting; (2) Developed a novel method for determining the mechanical properties of an alloy at the nonequilibrium mushy zone of the alloy; (3) Measured heat transfer coefficients (HTCs) between the solidifying ingot and the cooling water jet; (4) Determined the material constitutive model at high temperatures; and (5) Developed computational capabilities for the simulation of cracking formation in DC casting ingot. The models and the database de

Das, S.K.; Ningileri, S.; Long, Z.; Saito, K.; Khraisheh, M.; Hassan, M.H.; Kuwana, K.; Han, Q.; Viswanathan, S.; Sabau, A.S.; Clark, J.; Hyrn, J. (ANL)

2006-08-15T23:59:59.000Z

233

Sidewall containment of liquid metal with horizontal alternating magnetic fields  

DOE Patents (OSTI)

An apparatus is disclosed for confining molten metal with a horizontal alternating magnetic field. In particular, this invention employs a magnet that can produce a horizontal alternating magnetic field to confine a molten metal at the edges of parallel horizontal rollers as a solid metal sheet is cast by counter-rotation of the rollers. 19 figs.

Praeg, W.F.

1995-01-31T23:59:59.000Z

234

Methods and apparatus for manufacturing monocrystalline cast silicon and monocrystalline cast silicon bodies for photovoltaics  

DOE Patents (OSTI)

Methods and apparatuses are provided for casting silicon for photovoltaic cells and other applications. With such methods and apparatuses, a cast body of monocrystalline silicon may be formed that is free of, or substantially free of, radially-distributed impurities and defects and having at least two dimensions that are each at least about 35 cm is provided.

Stoddard, Nathan G

2014-01-14T23:59:59.000Z

235

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams  

Science Journals Connector (OSTI)

Flexible polyurethane/organically modified nanoclay (organoclay) nanocomposite foams were synthesized by ... polyurethane foam sample containing 2 wt.% of nanoclay revealed clay intercalation. Furthermore, SEM im...

Reza Jahanmardi; Behrad Kangarlou

2013-11-01T23:59:59.000Z

236

The X-ray Telescope of CAST  

E-Print Network (OSTI)

The Cern Axion Solar Telescope (CAST) is in operation and taking data since 2003. The main objective of the CAST experiment is to search for a hypothetical pseudoscalar boson, the axion, which might be produced in the core of the sun. The basic physics process CAST is based on is the time inverted Primakoff effect, by which an axion can be converted into a detectable photon in an external electromagnetic field. The resulting X-ray photons are expected to be thermally distributed between 1 and 7 keV. The most sensitive detector system of CAST is a pn-CCD detector combined with a Wolter I type X-ray mirror system. With the X-ray telescope of CAST a background reduction of more than 2 orders off magnitude is achieved, such that for the first time the axion photon coupling constant g_agg can be probed beyond the best astrophysical constraints g_agg < 1 x 10^-10 GeV^-1.

M. Kuster; H. Bruninger; S. Cbrian; M. Davenport; C. Elefteriadis; J. Englhauser; H. Fischer; J. Franz; P. Friedrich; R. Hartmann; F. H. Heinsius; D. H. H. Hoffmann; G. Hoffmeister; J. N. Joux; D. Kang; K. Knigsmann; R. Kotthaus; T. Papaevangelou; C. Lasseur; A. Lippitsch; G. Lutz; J. Morales; A. Rodrguez; L. Strder; J. Vogel; K. Zioutas

2007-05-10T23:59:59.000Z

237

The Effect of Moisture Absorption on the Physical Properties of Polyurethane Shape Memory Polymer Foams  

E-Print Network (OSTI)

. 6 2. EXPERIMENTAL 2.1 Polyurethane foam synthesis and sample preparation Polyurethane SMP foams were prepared based on a technique developed by Dr. Thomas S. Wilson at Lawrence Livermore National Laboratory. Prepolymers were made from...

Yu, Ya-Jen

2012-07-16T23:59:59.000Z

238

Characterization of New Glass Coated Foam Glass Insulating Tiles by Standard Tests  

Science Journals Connector (OSTI)

A good thermal insulation of buildings is today more and more...1). Among insulating materials, foam glasses are increasing their importance because of...2). Foam glasses are fiber-free inorganic insulation mater...

Andrea Ventrella; Federico Smeacetto

2012-11-01T23:59:59.000Z

239

Computational and Experimental Evaluation of Actuating Shape Memory Polymer Foams in the Context of Aneurysm Treatment  

E-Print Network (OSTI)

foam actuation necessitates an evaluation of potential thermal damage to nearby tissue. In the present investigation, the foam is idealized as a heat-dissipating, volumetrically static object centered in a straight tube of flowing water. Velocity...

Hahn, Edward

2010-07-14T23:59:59.000Z

240

Strain localization and cyclic damage of polyurethane foam cylinders: experimental tests and theoretical model  

E-Print Network (OSTI)

Strain localization and cyclic damage of polyurethane foam cylinders: experimental tests subject to progressive damage. The chain of springs models the strain localization, and the second series qualitative agreement with the experiments. Keywords: polyurethane foams; strain localization; cyclic damage

Boyer, Edmond

Note: This page contains sample records for the topic "foam metal casting" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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241

OPTIMISATION OF EXTRUDED POLYMER FOAM BY THE RESIDENT TIME DISTRIBUTION APPROACH  

E-Print Network (OSTI)

to simulate the twin-screw extruder[1] to [11] . In this paper, we have studied the processing of polystyrene foam by extrusion in a single screw extruder coupled with a gear pump. The basic principle of foamingOPTIMISATION OF EXTRUDED POLYMER FOAM BY THE RESIDENT TIME DISTRIBUTION APPROACH Frédéric Leonardi

Paris-Sud XI, Université de

242

Void Detection in Foam with Knit Lines Using THz Pulse Interrogation H. T. Banks 1  

E-Print Network (OSTI)

Columbia. The detection of voids inside the Sprayed on Foam Insulation (SOFI) belonging to the ThermalVoid Detection in Foam with Knit Lines Using THz Pulse Interrogation H. T. Banks 1 and N. L. Gibson­8205 February 4, 2006 Abstract We model electromagnetic interrogation of a polyurethane foam using the TE mode

243

Method for epoxy foam production using a liquid anhydride  

DOE Patents (OSTI)

An epoxy resin mixture with at least one epoxy resin of between approximately 50 wt % and 100 wt %, an anhydride cure agent of between approximately 0 wt % and approximately 50 wt %, a tert-butoxycarbonyl anhydride foaming agent of between proximately 0.1-20 wt %, a surfactant and an imidazole or similar catalyst of less than approximately 2 wt %, where the resin mixture is formed from at least one epoxy resin with a 1-10 wt % tert-butoxycarbonyl anhydride compound and an imidazole catalyst at a temperature sufficient to keep the resin in a suitable viscosity range, the resin mixture reacting to form a foaming resin which in the presence of an epoxy curative can then be cured at a temperature greater than 50.degree. C. to form an epoxy foam.

Celina, Mathias (Albuquerque, NM)

2012-06-05T23:59:59.000Z

244

Foam-buffered spherical implosions at 527 nm  

SciTech Connect

Creation of a low density, high temperature plasma buffer between the absorption and ablation layers of a directly driven inertial confinement fusion implosion capsule has been proposed as a means to reduce {open_quotes}early time{close_quotes} imprint from laser nonuniformities. This thermal smoothing blanket might be created from a low density foam layer wrapped around the deuterium{endash}tritium filled microballoon. Preliminary spherical implosion tests of this concept using a polystyrene foam layer surrounding a glass microballoon were performed at the Nova laser [Rev. Sci. Instrum. {bold 57}, 2101 (1986)], using a 527 nm drive wavelength. Comparison of capsule yield and imploded core symmetry showed promising improvements in overall target performance, relative to one-dimensional undegraded hydrodynamic simulations, when the foam-buffer layer was present. {copyright} {ital 1997 American Institute of Physics.}

Watt, R.G.; Wilson, D.C.; Chrien, R.E.; Hollis, R.V.; Gobby, P.L.; Mason, R.J.; Kopp, R.A. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Lerche, R.A.; Kalantar, D.H.; MacGowan, B.; Nelson, M.B.; Phillips, T. [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)] [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States); McKenty, P.W. [University of Rochester, Laboratory for Laser Energetics, Rochester, New York 14627 (United States)] [University of Rochester, Laboratory for Laser Energetics, Rochester, New York 14627 (United States); Willi, O. [Imperial College of Science and Technology, London (United Kingdom)] [Imperial College of Science and Technology, London (United Kingdom)

1997-05-01T23:59:59.000Z

245

Nanoclay syntactic foam compositesHigh strain rate properties  

Science Journals Connector (OSTI)

The effect of nanoclay on the high strain rate mechanical properties of syntactic foam composites is studied. Nanoclay syntactic foam composites are fabricated with 10, 30 and 60% microballoon volume fractions, each having 0, 1, 2 and 5% volume fraction of nanoclay. High strain rate tests using split Hopkinson pressure bar (SHPB) apparatus are performed on all types of composites. Quasi-static tests are also carried out on MTS-810 machine to compare the results with the dynamic SHPB results. It is found that inclusion of 1% nanoclay volume fraction gives the optimum enhancement in peak stress and modulus of nanoclay syntactic foam composites. In addition, specimens tested at high strain rate are shown to exhibit higher stress and modulus compared to those tested at low strain rate. Scanning electron microscopy is performed to study the fracture behavior under different loading rates.

Sameer Peter; Eyassu Woldesenbet

2008-01-01T23:59:59.000Z

246

Parabolic-Dish Solar Concentrators of Film on Foam  

E-Print Network (OSTI)

Parabolic and spherical mirrors are constructed of aluminized PET polyester film on urethane foam. During construction, the chosen shape of the mirror is created by manipulating the elastic/plastic behavior of the film with air pressure. Foam is then applied to the film and, once hardened, air pressure is removed. At an f-number of 0.68, preliminary models have an optical angular spread of less than 0.25 degrees, a factor of 3.3 smaller than that for a perfectly spherical mirror. The possibility exists for creating large-lightweight mirrors with excellent shape and stiffness. These "film-on-foam" construction techniques may also be applicable to parabolic-trough solar concentrators but do not appear to be suitable for optical imaging applications because of irregularities in the film.

Barton, Sean A

2009-01-01T23:59:59.000Z

247

E-Print Network 3.0 - a356 solidification cast Sample Search...  

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

Mathematics 10 Capabilities and Integration Potential of Current Casting Design Software Summary: and engineering information, simulation of the casting process...

248

Casting inorganic structures with DNA molds  

Science Journals Connector (OSTI)

...ligands can be used to tune the energy difference of selected crystallographic...casting a Ag cuboid. Cyan and green dots denote (anti-)connectors...likely a consequence of surface energy minimization of...properties Next we used electron energy loss spectroscopy (EELS...

Wei Sun; Etienne Boulais; Yera Hakobyan; Wei Li Wang; Amy Guan; Mark Bathe; Peng Yin

249

Casting inorganic structures with DNA molds  

Science Journals Connector (OSTI)

...ligands can be used to tune the energy difference of selected crystallographic...casting of Ag cuboid. Cyan and green dots denote (anti-)connectors...likely a consequence of surface energy minimization of Ag...properties Next, we used electron energy loss spectroscopy (EELS...

Wei Sun; Etienne Boulais; Yera Hakobyan; Wei Li Wang; Amy Guan; Mark Bathe; Peng Yin

2014-11-07T23:59:59.000Z

250

Structural effects in ICF foam-buffered targets  

SciTech Connect

Experiments have indicated that low-density foam buffer layers can significantly mitigate the perturbing effects of beam non-uniformities in direct drive laser-matter interactions. A smooth drive is essential to obtaining ignition in the Direct Drive approach to ICF ignition. Consequently, the authors have conducted a detailed study of the mitigating capabilities of foam-buffers, and how to optimize then. Smoothly driven implosions may prove crucial to obtaining the high energy and neutron yields needed for Science Based Stockpile Steward ship applications.

Mason, R.J.; Kopp, R.A.; Goldman, S.R.; Wilson, D.C.; Watt, R.G.

1997-10-01T23:59:59.000Z

251

Corrosion testing of urea-formaldehyde foam insulating material  

SciTech Connect

Two tests of the corrosiveness of urea-formaldehyde (UF) foam insulating materials were compared. One test, the Timm test, had test coupons foamed in place. In the second, the Canadian test, blocks of foam already set were placed in contact with test coupons. The Timm test uses 10 gage thick coupons, while the Canadian test specifies 3 mil thick ones. Two samples of UF foam were tested by the Timm and the Canadian tests. The electrical-resistance probes showed that the corrosion rate against steel was initially quite high, of the order of 12 to 20 mpy (mils per year). After about 20 days, the rate was almost zero. In the Timm test, the corrosion rates of steel coupons were of the order to 0.5 to 2 mpy when averaged over the 28 or 56 day test period. The greater corrosion rate of the thick coupons in the Canadian test as well as poor reproducibility of the corrosion rates was attributed primarily to variations in the contact areas between the sample and the UF foam. The corrosion rates of galvanized steel coupons in the Canadian test in several cases exceeded the failure value. In the Timm test, the corrosion rates averaged over the whole test period were quite low. The corrosion rates of copper and aluminum in both tests were quite low. On the basis of the results of this study the following recommendations for a corrosion-test procedure for UF foam were made: two corrosion tests should be conducted, one for foam while curing and one after it has stabilized; the Timm test for corrosiveness while curing should be used, but for only 1 to 2 days; the test for corrosiveness after stabilizing should be of the accelerated type such as the Canadian one. To insure a constant-contact area, thicker coupons should be used; and the coupons for both tests should have a controlled part of the area not in contact with the foam to simulate field conditions.

Weil, R.; Graviano, A.; Sheppard, K.

1980-09-01T23:59:59.000Z

252

Electrical conductivity of dispersions: from dry foams to dilute suspensions  

E-Print Network (OSTI)

We present new data for the electrical conductivity of foams in which the liquid fraction ranges from two to eighty percent. We compare with a comprehensive collection of prior data, and we model all results with simple empirical formul\\ae. We achieve a unified description that applies equally to dry foams and emulsions, where the droplets are highly compressed, as well as to dilute suspensions of spherical particles, where the particle separation is large. In the former limit, Lemlich's result is recovered; in the latter limit, Maxwell's result is recovered.

K. Feitosa; S. Marze; A. Saint-Jalmes; D. J. Durian

2005-07-18T23:59:59.000Z

253

Preliminary Investigation of the Thermal Decomposition of Ablefoam and EF-AR20 Foam (Ablefoam Replacement)  

SciTech Connect

Preliminary thermal decomposition experiments with Ablefoam and EF-AR20 foam (Ablefoam replacement) were done to determine the important chemical and associated physical phenomena that should be investigated to develop the foam decomposition chemistry sub-models that are required in numerical simulations of the fire-induced response of foam-filled engineered systems for nuclear safety applications. Although the two epoxy foams are physically and chemically similar, the thermal decomposition of each foam involves different chemical mechanisms, and the associated physical behavior of the foams, particularly ''foaming'' and ''liquefaction,'' have significant implications for modeling. A simplified decomposition chemistry sub-model is suggested that, subject to certain caveats, may be appropriate for ''scoping-type'' calculations.

ULIBARRI, TAMARA A.; DERZON, DORA K.; ERICKSON, KENNETH L.; CASTANEDA, JAIME N.; BOREK III, THEODORE T.; RENLUND, ANITA M.; MILLER, JILL C.; CLAYTON, DANIEL; FLETCHER, THOMAS H.

2002-01-01T23:59:59.000Z

254

Quasistatic rheology of foams II. Continuous shear flow  

E-Print Network (OSTI)

and numerically. We extract, from the images of the sheared foam, the plastic flow profiles and the modifications AND GEORGES DEBREGEAS2 1 Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, 29 in the temporal and spatial correlations of the plastic events. The spa- tial fluctuations of the static stress

255

FOAM: Expanding the Horizons of Climate Michael Tobis  

E-Print Network (OSTI)

on a project that expands the applicability of dynamic climate modeling to very long time scales. The FastFOAM: Expanding the Horizons of Climate Modeling Michael Tobis Mathematics and Computer Science passing, scientific supercomputing, climate, meteorology, oceanography, hydrology #12;Introduction Climate

256

Solidification of Aluminum Alloys Edited by TMS (The Minerals, Metals & Materials Society), 2004  

E-Print Network (OSTI)

Solidification of Aluminum Alloys Edited by TMS (The Minerals, Metals & Materials Society), 2004 Modeling the Effects of Mold Topography on Aluminum Cast Surfaces Lijian Tan1 , Nicholas Zabaras1 1 14853, USA Keywords: Aluminum Solidification; Mold topography; Cast Surfaces Abstract The air

Zabaras, Nicholas J.

257

Solar axion search with the CAST experiment  

E-Print Network (OSTI)

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of an LHC dipole. The analysis of the data recorded during the first phase of the experiment with vacuum in the magnet pipes has resulted in the most restrictive experimental limit on the coupling constant of axions to photons. In the second phase, CAST is operating with a buffer gas inside the magnet pipes in order to extent the sensitivity of the experiment to higher axion masses. We will present the first results on the $^{4}{\\rm He}$ data taking as well as the system upgrades that have been operated in the last year in order to adapt the experiment for the $^{3}{\\rm He}$ data taking. Expected sensitivities on the coupling constant of axions to photons will be given for the recent $^{3}{\\rm He}$ run just started in March 2008.

CAST Collaboration; E. Arik; S. Aune; D. Autiero; K. Barth; A. Belov; B. Beltrn; S. Borghi; F. S. Boydag; H. Bruninger; G. Cantatore; J. M. Carmona; S. A. Cetin; J. I. Collar; T. Dafni; M. Davenport; L. Di Lella; O. B. Dogan; C. Eleftheriadis; N. Elias; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; J. Franz; J. Galn; E. Gazis; T. Geralis; I. Giomataris; S. Gninenko; H. Gmez; M. Hasinoff; F. H. Heinsius; I. Hikmet; D. H. H. Hoffmann; I. G. Irastorza; J. Jacoby; K. Jakov?i?; D. Kang; T. Karageorgopoulou; M. Karuza; K. Knigsmann; R. Kotthaus; M. Kr?mar; K. Kousouris; M. Kuster; B. Laki?; C. Lasseur; A. Liolios; A. Ljubi?i?; V. Lozza; G. Lutz; G. Luzn; D. Miller; J. Morales; T. Niinikoski; A. Nordt; A. Ortiz; T. Papaevangelou; M. J. Pivovaroff; A. Placci; G. Raiteri; G. Raffelt; H. Riege; A. Rodrguez; J. Ruz; I. Savvidis; Y. Semertzidis; P. Serpico; S. K. Solanki; R. Soufli; L. Stewart; M. Tsagri; K. van Bibber; J5D. Villar; J. Vogel; L. Walckiers; K. Zioutas

2008-10-10T23:59:59.000Z

258

Steam-foam mechanistic field trial in the Midway-Sunset field  

SciTech Connect

A one-pattern, steam-foam mechanistic field trial was conducted in Section 26C of the Midway-Sunset field (upper Monarch sand). The test objectives were (1) to understand the mechanisms of steam diversion caused by foam under reservoir conditions, (2) to establish whether foam can exist in-depth away from the injection well, and (3) to measure incremental oil that can be attributed to foam. Surfactant was injected with steam and nitrogen continuously, and bottom-hole injection pressure (BIHP) increased from 100 to 300 psig, indicating good foam generation. Better steam distribution across the injector's perforations occurred when foam was generated. Improvements in both vertical and areal sweep efficiency of steam were observed. Substantial temperature and gas saturation increases coincided with surfactant breakthrough and local reservoir pressure increases at observation wells. Complementary laboratory core-floods showed that foam generation could occur at low-pressure gradients, which are typical of in-depth conditions. Both laboratory and field data were interpreted as evidence that the in-depth presence of foam was the result of local generation wherever surfactant, steam, and nitrogen were present, rather than propagation of a foam bank generated near the injector. Some oil-production increase was also observed during the test; however, an accurate quantitative estimate of incremental oil owing to foam was difficult to establish.

Friedmann, F.; Smith, M.E.; Guice, W.R. (Chevron Petroleum Technology Co., La Habra, CA (United States)); Gump, J. (Chevron USA Production Co., Bakersfield, CA (United States)); Nelson, D.G. (Chevron USA Production Co., Coalinga, CA (United States))

1994-11-01T23:59:59.000Z

259

APPLICATION OF POLYURETHANE FOAM FOR IMPACT ABSORPTION AND THERMAL INSULATION FOR RADIOACTIVE MATERIALS PACKAGINGS.  

SciTech Connect

Polyurethane foam has been widely used as an impact absorbing and thermal insulating material for large radioactive materials packages, since the 1980's. With the adoption of the regulatory crush test requirement, for smaller packages, polyurethane foam has been adopted as a replacement for cane fiberboard, because of its ability to withstand the crush test. Polyurethane foam is an engineered material whose composition is much more closely controlled than that of cane fiberboard. In addition, the properties of the foam can be controlled by controlling the density of the foam. The conditions under which the foam is formed, whether confined or unconfined have an affect on foam properties. The study reported here reviewed the application of polyurethane foam in RAM packagings and compared property values reported in the literature with published property values and test results for foam specimens taken from a prototype 9977 packaging. The study confirmed that, polyurethane foam behaves in a predictable and consistent manner and fully satisfies the functional requirements for impact absorption and thermal insulation.

Smith, A; Glenn Abramczyk, G; Paul Blanton, P; Steve Bellamy, S; William Daugherty, W; Sharon Williamson, S

2007-05-15T23:59:59.000Z

260

Cast Stone Formulation At Higher Sodium Concentrations  

SciTech Connect

A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased with increasing sodium molarity and with decreasing water to premix ratio, as expected given the individual densities of these components. Rheology measurements showed that all of the test mixes produced very fluid slurries. The fresh density and rheology data are of potential value in designing a future Cast Stone production facility. Standing water and density gradient testing showed that settling is not of particular concern for the high sodium compositions studied. Heat of hydration measurements may provide some insight into the reactions that occur within the test mixes, which may in turn be related to the properties and performance of the waste form. These measurements showed that increased sodium concentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. Leachability indices were determined for the test mixes for contaminants of interest. The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. This may be beneficial in demonstrating that the performance of the waste form is robust with respect to changes in the mix composition. The results of this study demonstrate the potential to achieve significantly higher waste loadings in Cast Stone and other low temperature, cementitious waste forms. Additional work is needed to elucidate the hydration mechanisms occurring in Cast Stone formulated with highly concentrated salt solutions since these reactions are responsible for determining the performance of the cured waste form. The thermal analyses completed in this study provide some preliminary insight, although the l

Fox, K. M.; Roberts, K. A.; Edwards, T. B.

2014-02-28T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Atomization of metal (Materials Preparation Center)  

SciTech Connect

Atomization of metal requires high pressure gas and specialized chambers for cooling and collecting the powders without contamination. The critical step for morphological control is the impingement of the gas on the melt stream. The video is a color video of a liquid metal stream being atomized by high pressure gas. This material was cast at the Ames Laboratorys Materials Preparation Center http://www.mpc.ameslab.gov WARNING - AUDIO IS LOUD.

None

2010-01-01T23:59:59.000Z

262

Energy-Saving Melting and Revert Reduction Technology (E-SMARRT): Development of Elevated Temperature Aluminum Metal Matrix Composite (MMC) Alloy and Its Processing Technology  

SciTech Connect

The objective of this project was to provide a production capable cast aluminum metal matrix composite (MMC) alloy with an operating temperature capability of 250-300C. Important industrial sectors as well as the military now seek lightweight aluminum alloy castings that can operate in temperature ranges of 250-300C. Current needs in this temperature range are being satisfied by the use of titanium alloy castings. These have the desired strength properties but the end components are heavier and significantly more costly. Also, the energy requirements for production of titanium alloy castings are significantly higher than those required for production of aluminum alloys and aluminum alloy castings.

Weiss, David C. [Eck Industreis, Inc.] [Eck Industreis, Inc.; Gegal, Gerald A.

2014-04-15T23:59:59.000Z

263

Foam for improving sweep efficiency in subterranean oil-bearing formations  

SciTech Connect

This patent describes a conformance improvement treatment process for a subterranean oil-bearing formation having a region of higher permeability and a region of lower permeability. It comprises injecting a foam into the region of higher permeability to reduce the permeability therein, the foam comprising a crosslinkable carboxylate-containing polymer, a crosslinking agent capable of crosslinking the polymer, a surfactant, a liquid solvent, and a foaming gas. A process for recovering oil from a subterranean oil-bearing formation by improving the mobility of a displacement fluid, the process. It comprises preparing a flowing mobility control foam comprising a crosslinkable polymer, a crosslinking agent capable of crosslinking the polymer, a surfactant, a liquid solvent, and a foaming gas; and displacing the foam through the formation by the displacement fluid to control the mobility of the displacement fluid in the formation.

Sydansk, R.D.

1992-04-21T23:59:59.000Z

264

Rigid foam polyurethane (PU) derived from castor oil (Ricinus communis) for thermal insulation in roof systems  

Science Journals Connector (OSTI)

This paper discusses the response of the thermal insulation lining of rigid foam polyurethane (PU) derived from castor oil (Ricinus communis) in heat conditions, based on dynamic climate approach. Liners have been widely used, because the coverage of buildings is responsible for the greatest absorption of heat by radiation, but the use of PU foam derived from this vegetal oil is unprecedented and has the advantage of being biodegradable and renewable. The hot wire parallel method provided the thermal conductivity value of the foam. The thermogravimetric analysis enabled the study of the foam decomposition and its lifetime by kinetic evaluation that involves the decomposition process. The PU foam thermal behavior analysis was performed by collecting experimental data of internal surface temperature measured by thermocouples and assessed by representative episode of the climatic fact. The results lead to the conclusion that the PU foam derived from castor oil can be applied to thermal insulation of roof systems and is an environmentally friendly material.

Grace Tibrio Cardoso; Salvador Claro Neto; Francisco Vecchia

2012-01-01T23:59:59.000Z

265

Development and Characterization of a New Epoxy Foam Encapsulant as an Ablefoam Replacement  

SciTech Connect

A new epoxy foam encapsulant, EF-ARIO/20, has been developed at Sandia National Laboratories (SNL) as a replacement for Ablefoam", an epoxy foam encapsulant used in the W76 Arming, Fusing, and Firing (Al%@) system. Since it contained toxic ingredients including a known carcinogen, Ablefoarn" is no longer commercially available. It has been demonstrated by scanning electron microscopy (SEM) that the microstructure of the new epoxy foam is similar to that of Ablefoam@. Mechanical properties of tensile and compressive strength, and tensile and compressive modulus, and thermal properties of glass transition temperature (.TJ, and coefficient of thermal expansion (CTE) have been measured for the new foam. Electrical properties of dielectric constant, dissipation factors, volume resistivity, and dielectric strength were also measured. These property measurements are comparable to those of Ablefoam@. Development and characterization of the new foam will be discusse~ and a comparison of mechanical, thermal, and electrical properties for the new epoxy foam and Ablefoam@ will be reported.

Rand, P.B.; Russick, E.M.

1998-12-01T23:59:59.000Z

266

Laser:powder:substrate interactions in laser cladding and casting  

Science Journals Connector (OSTI)

Laser cladding and the recently developed laser casting technique are similar in their physical mechanisms. A transition from cladding to casting and vice versa can be achieved by proper control of the process parameters, both for preplaced and blown powder. In the present work, the preplaced powder technique is studied at a fundamental level. Its physical nature is responsible for a large operating window of dilution free cladding on the one hand and bond free casting on the other.

A.F.H. Kaplan; John Powell; Hans Gedda

2010-01-01T23:59:59.000Z

267

A New Type of Submerged-Arc Flux-Cored Wire Used for Hardfacing Continuous Casting Rolls  

Science Journals Connector (OSTI)

It is expected that the welding hardfacing of continuous casting rolls has better welding performance and higher wear resistance. A new type of submerged-arc hardfacing flux-cored wire has been developed through nitrogen replacing part of carbon and addition of the nitrogen-fixing elements of niobium and titanium. And microstructure, degree of hardness and high-temperature wear resistance of its deposited metal samples were also investigated. It is found that the microstructure is martensite, residual austenite and carbonitride precipitates. As a result, the hardfacing metal with homogeneous distribution of very fine carbonitride particles had high hardness and excellent wear-resisting property during high-temperature wear, which could significantly extend the service life of continuous casting rolls.

Ke YANG; Zhi-xi ZHANG; Wang-qin HU; Ye-feng BAO; Yong-feng JIANG

2011-01-01T23:59:59.000Z

268

Low-density hydrocarbon foams for laser fusion targets: Progress report, 1987  

SciTech Connect

This report describes progress made in the development of direct-drive hydrocarbon foam targets for laser inertial confinement fusion during 1987. The foam materials are polystyrene, resorcinol-formaldehyde, carbonized resorcinol-formaldehyde, and cellulose acetate. The processes for making the foams, their properties, characterization techniques, and the relationship of their properties to target specifications are presented. Progress in the creation and testing of prototype targets is also described.

Haendler, B.L.; Buckley, S.R.; Chen, C.; Cook, A.R.; Cook, R.C.; Hair, L.M.; Kong, F.M.; Kramer, H.D.; Letts, S.A.; Overturf, G.E. III

1988-06-01T23:59:59.000Z

269

Virtual Aluminum Castings An Industrial Application of Integrated...  

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

Virtual Aluminum Castings An Industrial Application of Integrated Computational Materials Engineering Home Author: J. Allison, M. Li, C. Wolverton, X. Su Year: 2006 Abstract: The...

270

Development of Integrated Die Casting Process for Large Thin...  

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

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

271

Advanced precision expendable pattern casting technology. 1994 Summary report  

SciTech Connect

Casting technology is described. The following areas are reported on: precision pattern production; pattern coating; sand fill and compaction; pattern gating; mechanical properties; and technology transfer efforts.

NONE

1995-05-01T23:59:59.000Z

272

Spray-on foam insulations for launch vehicle cryogenic tanks  

Science Journals Connector (OSTI)

Spray-on foam insulation (SOFI) has been developed for use on the cryogenic tanks of space launch vehicles beginning in the 1960s with the Apollo program. The use of SOFI was further developed for the Space Shuttle program. The External Tank (ET) of the Space Shuttle, consisting of a forward liquid oxygen tank in line with an aft liquid hydrogen tank, requires thermal insulation over its outer surface to prevent ice formation and avoid in-flight damage to the ceramic tile thermal protection system on the adjacent Orbiter. The insulation also provides system control and stability throughout the lengthy process of cooldown, loading, and replenishing the tank. There are two main types of SOFI used on the ET: acreage (with the rind) and closeout (machined surface). The thermal performance of the seemingly simple SOFI system is a complex array of many variables starting with the large temperature difference of 200260K through the typical 25-mm thickness. Environmental factors include air temperature and humidity, wind speed, solar exposure, and aging or weathering history. Additional factors include manufacturing details, launch processing operations, and number of cryogenic thermal cycles. The study of the cryogenic thermal performance of SOFI under large temperature differentials is the subject of this article. The amount of moisture taken into the foam during the cold soak phase, termed Cryogenic Moisture Uptake, must also be considered. The heat leakage rates through these foams were measured under representative conditions using laboratory standard liquid nitrogen boiloff apparatus. Test articles included baseline, aged, and weathered specimens. Testing was performed over the entire pressure range from high vacuum to ambient pressure. Values for apparent thermal conductivity and heat flux were calculated and compared with prior data. As the prior data of record was obtained for small temperature differentials on non-weathered foams, analysis of the different methods is provided. Recent advancements and applications of SOFI systems on future launch vehicles and spacecraft are also addressed.

J.E. Fesmire; B.E. Coffman; B.J. Meneghelli; K.W. Heckle

2012-01-01T23:59:59.000Z

273

Carbon foam characterization: sandwich flexure, tensile and shear response  

E-Print Network (OSTI)

pitches. More recently, new manufacturing developments have been made at Oakridge National Laboratory (ORNL) [4,5]. Changes in the manufacturing process have led to enhancement of certain thermal properties, and are leading the way to use of carbon foam.... As the material becomes more available to industry, the list of potential applications will continue to grow; however, there are some promising potential applications currently under development. ORNL is currently investigating and applying the unique thermal...

Sarzynski, Melanie Diane

2004-09-30T23:59:59.000Z

274

Comments on Cahill's Quantum Foam Inflow Theory of Gravity  

E-Print Network (OSTI)

We reveal an underlying flaw in Reginald T. Cahill's recently promoted quantum foam inflow theory of gravity. It appears to arise from a confusion of the idea of the Galilean invariance of the acceleration of an individual flow with what is obtained as an acceleration when a homogeneous flow is superposed with an inhomogeneous flow. We also point out that the General Relativistic covering theory he creates by substituting a generalized Painleve-Gullstrand metric into Einstein's field equations leads to absurd results.

T. D. Martin

2004-07-20T23:59:59.000Z

275

Explosively driven low-density foams and powders  

DOE Patents (OSTI)

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

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

2010-05-04T23:59:59.000Z

276

Continuation of Crosscutting Technology Development at Cast  

SciTech Connect

This Final Technical Report describes progress made on the sub-projects awarded in the Cooperative Agreement DE-FC26-05NT42457: Continuation of Crosscutting Technology Development at Center for Advanced Separation Technologies (CAST). The final reports for each sub-project are attached in the appendix. Much of the research to be conducted with Cooperative Agreement funds will be longer-term, high-risk, basic research and will be carried out in five broad areas: a) Solid-solid separation b) Solid-liquid separation c) Chemical/Biological Extraction d) Modeling and Control, and e) Environmental Control.

Yoon, Roe-Hoan

2012-03-31T23:59:59.000Z

277

Thermal Characterization of Graphitic Carbon Foams for Use in Thermal Storage Applications.  

E-Print Network (OSTI)

?? Highly conductive graphitic foams are currently being studied for use as thermal conductivity enhancers (TCEs) in thermal energy storage (TES) systems. TES systems store (more)

Drummond, Kevin P.

2012-01-01T23:59:59.000Z

278

The use of coated micropowders to reduce radiation heat transfer in foam insulation  

E-Print Network (OSTI)

Polyurethane foam is the most effective insulation currently available for buildings. Chlorofluorocarbon (CFC) blowing agents, which have low thermal conductivities, contribute highly to the effectiveness of this insulation. ...

Marge, Arlene Lanciani

1991-01-01T23:59:59.000Z

279

E-Print Network 3.0 - advanced lost foam Sample Search Results  

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

of Fusion Energy, Madison WI, Sept. 14-16, 2004. Summary: ratios. Based on these recent innovations and advances, we suggest the development of ceramic foams... ., Pacoima...

280

Development of High Performance Hybrid Syntactic Foams: Structure and Material Property Characterization.  

E-Print Network (OSTI)

??Syntactic foams are light weight particulate composites that use hollow particles (microballoons) as reinforcement in a polymer resin matrix. High strength microballoons provide closed cell (more)

Maharsia, Rahul R

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Physical simulation and fine digital study of thermal foam compound flooding  

Science Journals Connector (OSTI)

According to the similarity criterion of 3D physical simulation of thermal recovery, experimental parameters of 3D physical simulation of steam flooding and thermal foam compound flooding in extra-heavy oil reservoirs of the Gudao Oilfield were calculated, and relevant experiments were carried out. Based on the experimental results, 3D fine numerical simulation was carried out to analyze the steam flooding and thermal foam compound flooding in heavy oil reservoirs. The results show that thermal foam compound flooding could effectively inhibit steam channeling and improve sweep efficiency, and thus enhance the oil recovery in heavy oil reservoirs after steam flooding. Technological parameters of thermal foam compound flooding were optimized according to the results of fine numerical simulation. The optimum injection method is foam-slug injection, the optimal steam injection rate is 25 mL/min, nitrogen injection rate is 1 000 mL/min (standard conditions), the time of foam-slug injection is 1.0 min and the interval between foam-slugs is about 10-20 min during thermal foam-slug injection. At last, the similarity criterion was employed for inversion calculation of the optimization results. Based on the results, optimal field injection and production parameters can be confirmed. The ultimate recovery ratio of thermal foam compound flooding in super-heavy oil reservoirs could reach 42.15%, which is 12.50% higher than steam flooding.

Zhanxi PANG; Huiqing LIU; Pingyuan GE; Li HAN

2012-01-01T23:59:59.000Z

282

Pitch-based carbon foam heat sink with phase change material  

DOE Patents (OSTI)

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications. The foam is encased and filled with a phase change material to provide a very efficient heat sink device.

Klett, James W. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN)

2002-01-01T23:59:59.000Z

283

Pitch-based carbon foam heat sink with phase change material  

DOE Patents (OSTI)

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications. The foam is encased and filled with a phase change material to provide a very efficient heat sink device.

Klett, James W. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

284

Numerical Analysis and Design of Carbon-Foam-based Garment and Helmet for Firefighters.  

E-Print Network (OSTI)

??Carbon foam is known for its excellent insulation properties and is also regarded as an effective shock absorbing material. In the present work, a numerical (more)

Mishra, Sarthak

2014-01-01T23:59:59.000Z

285

Analysis of Fire Performance, Smoke Development and Combustion Gases from Flame Retarded Rigid Polyurethane Foams.  

E-Print Network (OSTI)

??Rigid polyurethane foam is a polymeric material which is widely used for thermal insulation in building construction and other applications. Given recent emphasis on energy (more)

Adeosun, David

2014-01-01T23:59:59.000Z

286

Assessment of Computer Simulation Software and Process Data for High Pressure Die Casting of Magnesium  

SciTech Connect

Computer software for the numerical simulation of solidification and mold filling is an effective design tool for cast structural automotive magnesium components. A review of commercial software capabilities and their validation procedures was conducted. Aside form the software assessment, the program addressed five main areas: lubricant degradation, lubricant application, gate atomization, and heat transfer at metal mold interfaces. A test stand for lubricant application was designed. A sensor was used for the direct measurement of heat fluxes during lubricant application and casting solidification in graphite molds. Spray experiments were conducted using pure deionized water and commercial die lubricants. The results show that the sensor can be used with confidence for measuring heat fluxes under conditions specific to the die lube application. The data on heat flux was presented in forms suitable for use in HPDC simulation software. Severe jet breakup and atomization phenomena are likely to occur due to high gate velocities in HPDC. As a result of gate atomization, droplet flow affects the mold filling pattern, air entrapment, skin formation, and ensuing defects. Warm water analogue dies were designed for obtaining experimental data on mold filling phenomena. Data on break-up jet length, break-up pattern, velocities, and droplet size distribution were obtained experimentally and was used to develop correlations for jet break-up phenomena specific to die casting gate configurations.

Sabau, Adrian S [ORNL; Hatfield, Edward C [ORNL; Dinwiddie, Ralph Barton [ORNL; Kuwana, Kazunori [University of Kentucky; Viti, Valerio [University of Kentucky, Lexington; Hassan, Mohamed I [University of Kentucky, Lexington; Saito, Kozo [University of Kentucky

2007-09-01T23:59:59.000Z

287

Method of making metal matrix composites reinforced with ceramic particulates  

DOE Patents (OSTI)

Composite materials and methods for making such materials are disclosed in which dispersed ceramic particles are at chemical equilibrium with a base metal matrix, thereby permitting such materials to be remelted and subsequently cast or otherwise processed to form net weight parts and other finished (or semi-finished) articles while maintaining the microstructure and mechanical properties (e.g. wear resistance or hardness) of the original composite. The composite materials of the present invention are composed of ceramic particles in a base metal matrix. The ceramics are preferably carbides of titanium, zirconium, tungsten, molybdenum or other refractory metals. The base metal can be iron, nickel, cobalt, chromium or other high temperature metal and alloys thereof. For ferrous matrices, alloys suitable for use as the base metal include cast iron, carbon steels, stainless steels and iron-based superalloys.

Cornie, James A. (North Chelmsford, MA); Kattamis, Theodoulos (Watertown, MA); Chambers, Brent V. (Cambridge, MA); Bond, Bruce E. (Bedford, MA); Varela, Raul H. (Canton, MA)

1989-01-01T23:59:59.000Z

288

Method of making metal matrix composites reinforced with ceramic particulates  

DOE Patents (OSTI)

Composite materials and methods for making such materials are disclosed in which dispersed ceramic particles are at chemical equilibrium with a base metal matrix, thereby permitting such materials to be remelted and subsequently cast or otherwise processed to form net weight parts and other finished (or semi-finished) articles while maintaining the microstructure and mechanical properties (e.g. wear resistance or hardness) of the original composite. The composite materials of the present invention are composed of ceramic particles in a base metal matrix. The ceramics are preferably carbides of titanium, zirconium, tungsten, molybdenum or other refractory metals. The base metal can be iron, nickel, cobalt, chromium or other high temperature metal and alloys thereof. For ferrous matrices, alloys suitable for use as the base metal include cast iron, carbon steels, stainless steels and iron-based superalloys. 2 figs.

Cornie, J.A.; Kattamis, T.; Chambers, B.V.; Bond, B.E.; Varela, R.H.

1989-08-01T23:59:59.000Z

289

The Effect of Applied Pressure During Feeding of Critical Cast Aluminum Alloy Components With Particular Reference to Fatigue Resistance  

SciTech Connect

the medium to long freezing range alloys of aluminum such as A356, A357, A206, 319 for example are known to exhibit dispersed porosity, which is recognized as a factor affecting ductility, fracture toughness, and fatigue resistance of light alloy castings. The local thermal environment, for example, temperature gradient and freezing from velocity, affect the mode of solidification which, along with alloy composition, heat treatment, oxide film occlusion, hydrogen content, and the extent to which the alloy contracts on solidification, combine to exert strong effects on the porosity formation in such alloys. In addition to such factors, the availability of liquid metal and its ability to flow through the partially solidified casting, which will be affect by the pressure in the liquid metal, must also be considered. The supply of molten metal will thus be controlled by the volume of the riser available for feeding the particular casting location, its solidification time, and its location together with any external pressure that might be applied at the riser.

J.T. Berry; R. Luck; B. Zhang; R.P. Taylor

2003-06-30T23:59:59.000Z

290

SPUF - a simple polyurethane foam mass loss and response model.  

SciTech Connect

A Simple PolyUrethane Foam (SPUF) mass loss and response model has been developed to predict the behavior of unconfined, rigid, closed-cell, polyurethane foam-filled systems exposed to fire-like heat fluxes. The model, developed for the B61 and W80-0/1 fireset foam, is based on a simple two-step mass loss mechanism using distributed reaction rates. The initial reaction step assumes that the foam degrades into a primary gas and a reactive solid. The reactive solid subsequently degrades into a secondary gas. The SPUF decomposition model was implemented into the finite element (FE) heat conduction codes COYOTE [1] and CALORE [2], which support chemical kinetics and dynamic enclosure radiation using 'element death.' A discretization bias correction model was parameterized using elements with characteristic lengths ranging from 1-mm to 1-cm. Bias corrected solutions using the SPUF response model with large elements gave essentially the same results as grid independent solutions using 100-{micro}m elements. The SPUF discretization bias correction model can be used with 2D regular quadrilateral elements, 2D paved quadrilateral elements, 2D triangular elements, 3D regular hexahedral elements, 3D paved hexahedral elements, and 3D tetrahedron elements. Various effects to efficiently recalculate view factors were studied -- the element aspect ratio, the element death criterion, and a 'zombie' criterion. Most of the solutions using irregular, large elements were in agreement with the 100-{micro}m grid-independent solutions. The discretization bias correction model did not perform as well when the element aspect ratio exceeded 5:1 and the heated surface was on the shorter side of the element. For validation, SPUF predictions using various sizes and types of elements were compared to component-scale experiments of foam cylinders that were heated with lamps. The SPUF predictions of the decomposition front locations were compared to the front locations determined from real-time X-rays. SPUF predictions of the 19 radiant heat experiments were also compared to a more complex chemistry model (CPUF) predictions made with 1-mm elements. The SPUF predictions of the front locations were closer to the measured front locations than the CPUF predictions, reflecting the more accurate SPUF prediction of mass loss. Furthermore, the computational time for the SPUF predictions was an order of magnitude less than for the CPUF predictions.

Hobbs, Michael L.; Lemmon, Gordon H.

2003-07-01T23:59:59.000Z

291

Final Report: Use of Graphite Foam as a Thermal Performance Enhancement of Heavy Hybrid Propulsion Systems  

SciTech Connect

Oak Ridge National Laboratory's graphite foam has the potential to be used as a heat exchanger for the Army's Future Combat System Manned Ground Vehicle and thus has the potential to improve its thermal performance. The computational fluid dynamics (CFD) program FLOW3D was used to develop a new CFD model for the graphite foam to be used in the development of a proper heat exchanger. The program was calibrated by first measuring the properties of the solid foams and determining the parameters to be used in the CFD model. Then the model was used to predict within 5% error the performance of finned foam heat sinks. In addition, the f factors and j factors commonly used to predict pressure drop and heat transfer were calculated for both the solid and finned structures. There was some evidence that corrugating the foams would yield higher j/f ratios than state of the art heat exchangers, confirming previously measured data. Because the results show that the CFD model was validated, it is recommended that the funding for Phases 2 through 5 be approved for the design of both the finned heat exchanger using tubes and round fin structures and the solid foam design using corrugated foams. It was found that the new CFD model using FLOW3D can predict both solid foam heat transfer and finned foam heat transfer with the validated model parameters. In addition, it was found that the finned foam structures exhibited j/f ratios that indicate that significant heat transfer is occurring within the fin structures due to aerodynamically induced flow, which is not present in solid aluminum fin structures. It is possible that the foam surfaces can act as turbulators that increase heat transfer without affecting pressure drop, like the vortex generators seen in state of the art heat exchangers. These numbers indicate that the foam can be engineered into an excellent heat exchanger. It was also found that corrugating the solid foams would increase the j/f ratio dramatically, allowing the solid foams to compete directly with standard heat exchangers. Although corrugated L1 foam samples have not been produced (attempts are under way), it is possible that their j/f ratio can be even higher than those of the finned structures.

Klett, James William [ORNL; Conklin, Jim [ORNL

2011-06-01T23:59:59.000Z

292

Brief paper: Adaptive robust stabilization of continuous casting  

Science Journals Connector (OSTI)

Continuous casting processes can suffer from a disturbance effect, called ''dynamic bulging'', that causes large oscillations of the mold level, significantly reduces the quality of the final product and may cause instability and damages. In this paper ... Keywords: Adaptive systems, Continuous casting, Disturbance rejection, Stability of linear plants, Time-delay systems

Christian Furtmller; Patrizio Colaneri; Luigi del Re

2012-01-01T23:59:59.000Z

293

Automatic 3D modeling of palatal plaster casts Marco Andreetto  

E-Print Network (OSTI)

Automatic 3D modeling of palatal plaster casts Marco Andreetto Dept. of Information Engineer-form surfaces of anatomi- cal interest. 1. Introduction Plaster models derived from palate's impressions. A data-base with the 3D models of the plaster casts, which could be called a "virtual gypsotheque", can

Abu-Mostafa, Yaser S.

294

A boosting discriminative model for moving cast shadow detection  

Science Journals Connector (OSTI)

Moving cast shadow causes serious problem while segmenting and extracting foreground from image sequences, due to the misclassification of moving shadow as foreground. This paper proposes a boosting discriminative model for moving cast shadow detection. ... Keywords: boosting, discriminative random fields, graph cut, shadow detection

Yufei Zha; Ying Chu; Duyan Bi

2007-08-01T23:59:59.000Z

295

Removal of Cu, Pb and Zn by foam fractionation and a soil washing process from contaminated industrial soils using soapberry-derived saponin: A comparative effectiveness assessment  

Science Journals Connector (OSTI)

Abstract The feasibility of using the eco-friendly biodegradable surfactant saponin (a plant-based surfactant) from soapberry and surfactin from Bacillus subtilis (BBK006) for the removal of heavy metals from contaminated industrial soil (6511mgkg?1 copper, 4955mgkg?1 lead, and 15090mgkg?1 zinc) by foam fractionation and a soil flushing process was evaluated under variation of fundamental factors (surfactant concentration, pH, temperature and time). The results of latter process showed that 12% Pb, 1617% Cu and 2124% Zn was removed by surfactin after 48h, whereas the removal of Pb, Cu and Zn was increased from 40% to 47%, 30% to 36% and 16% to 18% in presence of saponin with an increase from 24 to 72h at room temperature by the soil washing process at pH 4. In the foam fractionation process, the metal removal efficiencies were increased with increases in the saponin concentration (0.0750.15gL?1) and time (2472h), whereas the efficiency was decreased with increasing pH (410) and temperature (>40C). The removal efficiencies of Pb, Cu and Zn were increased significantly from 57% to 98%, 85% to 95% and 55% to 56% with an increase in the flow rate from 0.2 to 1.0Lmin?1 at 0.15gL?1 saponin (pH 4 and 30C). The present investigation indicated that the foam fractionation process is more efficient for the removal of heavy metal from contaminated industrial soil in comparison to the soil washing process. The plant-based eco-friendly biodegradable biosurfactant saponin can be used for environmental cleanup and pollution management.

Jyoti Prakash Maity; Yuh Ming Huang; Chun-Mei Hsu; Ching-I Wu; Chien-Cheng Chen; Chun-Yi Li; Jiin-Shuh Jean; Young-Fo Chang; Chen-Yen Chen

2013-01-01T23:59:59.000Z

296

Grain Refinement of Permanent Mold Cast Copper Base Alloys  

SciTech Connect

Grain refinement is a well established process for many cast and wrought alloys. The mechanical properties of various alloys could be enhanced by reducing the grain size. Refinement is also known to improve casting characteristics such as fluidity and hot tearing. Grain refinement of copper-base alloys is not widely used, especially in sand casting process. However, in permanent mold casting of copper alloys it is now common to use grain refinement to counteract the problem of severe hot tearing which also improves the pressure tightness of plumbing components. The mechanism of grain refinement in copper-base alloys is not well understood. The issues to be studied include the effect of minor alloy additions on the microstructure, their interaction with the grain refiner, effect of cooling rate, and loss of grain refinement (fading). In this investigation, efforts were made to explore and understand grain refinement of copper alloys, especially in permanent mold casting conditions.

M.Sadayappan; J.P.Thomson; M.Elboujdaini; G.Ping Gu; M. Sahoo

2005-04-01T23:59:59.000Z

297

The Influence of Casting Conditions on the Microstructure of As-Cast U-10Mo Alloys: Characterization of the Casting Process Baseline  

SciTech Connect

Sections of eight plate castings of uranium alloyed with 10 wt% molybdenum (U-10Mo) were sent from Y-12 to the Pacific Northwest National Laboratory (PNNL) for microstructural characterization. This report summarizes the results from this study.

Nyberg, Eric A.; Joshi, Vineet V.; Lavender, Curt A.; Paxton, Dean M.; Burkes, Douglas

2013-12-13T23:59:59.000Z

298

Rigid polyurethane foams in refrigeration. (Latest citations from the Rubber and Plastics Research Association database). Published Search  

SciTech Connect

The bibliography contains citations concerning the use of rigid polyurethane as thermal insulation in refrigerators. Production machinery, foam systems such as one-shot prepolymer systems, and properties of rigid polyurethane foams used in refrigerators are among the topics discussed. Curing methods, in-place foaming, and bun foaming are also included. (Contains a minimum of 70 citations and includes a subject term index and title list.)

Not Available

1994-03-01T23:59:59.000Z

299

Polyurethane/polyisocyanurate foam thermal insulation. (Latest citations from the Rubber and Plastics Research Association database). Published Search  

SciTech Connect

The bibliography contains citations concerning the use of polyisocyanurate/polyurethane foam for thermal insulation building materials. The topics discussed include flammability and smoke generation characteristics, building frame sheathing materials, fiber reinforcement, laminated insulation foam boards, substitution for controversial formaldehyde foams and aging characteristics. Performance evaluations of existing buildings with installed foam insulation are included. (Contains a minimum of 187 citations and includes a subject term index and title list.)

Not Available

1994-06-01T23:59:59.000Z

300

E-Print Network 3.0 - astrophysicists cast doubt Sample Search...  

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

STRESSES DURING CASTING OF BINARY MAGNESIUM-ALUMINUM ALLOYS M.G. Pokorny1 , C... , Geesthacht, Germany Keywords: Magnesium Alloys, Casting, Stress Simulation Abstract A visco...

Note: This page contains sample records for the topic "foam metal casting" 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

E-Print Network 3.0 - alloy dental castings Sample Search Results  

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

STRESSES DURING CASTING OF BINARY MAGNESIUM-ALUMINUM ALLOYS M.G. Pokorny1 , C... , Geesthacht, Germany Keywords: Magnesium Alloys, Casting, Stress Simulation Abstract A visco......

302

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical...  

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

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Print Wednesday,...

303

Thermal degradation of new and aged urethane foam and epon 826 epoxy.  

SciTech Connect

Thermal desorption spectroscopy was used to monitor the decomposition as a function of temperature for the foam and epoxy as a function of temperature in the range of 60C to 170C. Samples were studied with one day holds at each of the studied temperatures. Both new (FoamN and EpoxyN) and aged (FoamP and EpoxyP) samples were studied. During these ~10 day experiments, the foam samples lost 11 to 13% of their weight and the EpoxyN lost 10% of its weight. The amount of weight lost was difficult to quantify for EpoxyP because of its inert filler. The onset of the appearance of organic degradation products from FoamP began at 110C. Similar products did not appear until 120C for FoamN, suggesting some effect of the previous decades of storage for FoamP. In the case of the epoxies, the corresponding temperatures were 120C for EpoxyP and 110C for EpoxyN. Suggestions for why the aged epoxy seems more stable than newer sample include the possibility of incomplete curing or differences in composition. Recommendation to limit use temperature to 90-100C for both epoxy and foam.

Kruizenga, Alan Michael; Mills, Bernice E.

2013-08-01T23:59:59.000Z

304

Honeywell developing low-GWP liquid blowing agent for foam insulation  

Science Journals Connector (OSTI)

Honeywell reports that it is developing a new blowing agent with low global warming potential (GWP) for energy-efficient polyurethane foam insulation. The non-flammable liquid blowing agent will provide customers with an alternative to hydrocarbons and traditional hydrofluorocarbons (HFCs) and assist customers in reducing the overall environmental impact of foam, the company says.

2009-01-01T23:59:59.000Z

305

Short- and Long-Term Releases of Fluorocarbons from Disposal of Polyurethane Foam Waste  

Science Journals Connector (OSTI)

Short- and Long-Term Releases of Fluorocarbons from Disposal of Polyurethane Foam Waste ... In another study by Bomberg and Brandreth12 foam samples showed that around 30% of the CFC-11 was present in the PUR phase after 11 years of laboratory storage. ... and diffusivity for these blowing agents in polyurethane are explained in terms of the soly. ...

Peter Kjeldsen; Charlotte Scheutz

2003-10-01T23:59:59.000Z

306

Liquid Foams D. Weaire, S.J. Cox and K. Brakke  

E-Print Network (OSTI)

is clumsy in English and it is elusive in French. The book is mainly based upon a series of papers of Foams (Weaire and Hutzler 1999) is a broad introduction, mostly con- centrating on liquid foams, close to the optimum for electrical or thermal conductivity (Durand et al. 2004). For other properties

Cox, Simon

307

Effect of Gas Diffusion on Mobility of Foam for Enhanced Oil Recovery Lars E. Nonnekes1  

E-Print Network (OSTI)

Effect of Gas Diffusion on Mobility of Foam for Enhanced Oil Recovery Lars E. Nonnekes1 Foam can improve the sweep efficiency of gas injected into oil reservoirs for enhanced oil recovery University William Richard Rossen Email: W.R.Rossen@tudelft.nl Abstract Transport of gas across

Cox, Simon

308

NETL Technology Transfer Agreements & Research Partnerships Available  

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

How to Partner How to Partner Technology Transfer NETL Technology Transfer Agreements & Research Partnerships Pouring molten metal into a lost foam, loose sand casting for cast steel armorplate Pouring molten metal into a lost foam, loose sand casting for cast steel armorplate A technology transfer agreement with the National Energy Technology Laboratory (NETL) provides access to the research and development expertise, facilities, and intellectual property of a government research facility. Specializing in fossil fuel energy research, NETL technology transfer options include: Research Partnership Notice - "Seeking Partnerships on Field Research Related to Shale Gas Development" Cooperative Research and Development Agreement (CRADA) Contributed Funds-in Agreement (CFA)

309

Method of casting silicon into thin sheets  

DOE Patents (OSTI)

Silicon (Si) is cast into thin shapes within a flat-bottomed graphite crucible by providing a melt of molten Si along with a relatively small amount of a molten salt, preferably NaF. The Si in the resulting melt forms a spherical pool which sinks into and is wetted by the molten salt. Under these conditions the Si will not react with any graphite to form SiC. The melt in the crucible is pressed to the desired thinness with a graphite tool at which point the tool is held until the mass in the crucible has been cooled to temperatures below the Si melting point, at which point the Si shape can be removed.

Sanjurjo, Angel (San Jose, CA); Rowcliffe, David J. (Los Altos, CA); Bartlett, Robert W. (Tucson, AZ)

1982-10-26T23:59:59.000Z

310

Radiation Resistant Foams | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Radiation Resistant Foams Radiation Resistant Foams Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights Highlight Archives News & Events Publications Contact BES Home 04.27.12 Radiation Resistant Foams Print Text Size: A A A RSS Feeds FeedbackShare Page Scientific Achievement Experiments and computer simulations demonstrate that nanoscale gold foams can be designed for radiation resistanceSignificance and Impact May lead to the design of new radiation resistant materials that extend the lifetime and increase the safety of nuclear reactors.Research Details The optimal nanostructural design appears to be the consequence of the combined effect of two length scales dependent on the irradiation conditions: (i) foams with ligament diameters below a minimum value melt

311

Rayleigh-Taylor instability growth on low-density foam targets  

SciTech Connect

In recent laser fusion programs, foam cryogenic targets have been developed as promising targets which have a great potential to realize efficient nuclear fusion. The foam is porous plastic material having a microstructure inside. We observed the growth of the Rayleigh-Taylor (RT) instability on the foam target with initial surface perturbation for the first time. The measured RT growth rate on the foam target was clearly suppressed in comparison to that of normal-density polystyrene (CH) targets. The values of the RT growth rate for the low-density foam target and the normal-density CH target were 0.84{+-}0.15 (1/ns) and 1.33{+-}0.1 (1/ns), respectively.

Watari, T.; Nakai, M.; Azechi, H.; Sakaiya, T.; Shiraga, H.; Shigemori, K.; Fujioka, S.; Otani, K.; Nagai, K.; Sunahara, A.; Nagatomo, H.; Mima, K. [Institute of Laser Engineering, Osaka University, Yamada-Oka 2-6, Suita, Osaka 565-0871 (Japan)

2008-09-15T23:59:59.000Z

312

Drag coefficient for the air-sea exchange: foam impact in hurricane conditions  

E-Print Network (OSTI)

A physical model is proposed for the estimation of the foam impact on the variation of the effective drag coefficient, C_d, with reference to the wind speed U10 in stormy and hurricane conditions. In the present model C_d is approximated by partitioning the sea surface into foam-covered and foam-free areas. Based on the available optical and radiometric measurements of the fractional foam coverage and the characteristic roughness of the sea-surface in the saturation limit of the foam coverage, the model yields the resulting dependence of C_d vs U10. This dependence is in fair agreement with that evaluated from field measurements of the vertical variation of the mean wind speed.

Golbraikh, Ephim

2014-01-01T23:59:59.000Z

313

Development of a low loss magnetic composite utilizing amorphous metal flake. Third semi-annual progress report, 19 September 1979-18 March 1980  

SciTech Connect

The objective of this project is to determine the feasibility of casting amorphous metal ribbon in the shape of a helix with properties suitable for motor applications. The tasks include (1) determination of the casting parameters required to produce a helical ribbon, (2) evaluation of magnetic properties and methods for bonding, and (3) developing methods for patterning a wheel for producing motor slots in as-cast ribbon.

Johnson, L.

1980-04-01T23:59:59.000Z

314

Spray Foam Exterior Insulation with Stand-Off Furring  

SciTech Connect

IBACOS, in collaboration with GreenHomes America, was contracted by the New York State Energy Research and Development Authority to research exterior wall insulation solutions. This research investigated cost-effective deep energy retrofit (DER) solutions for improving the building shell exterior while achieving a cost-reduction goal, including reduced labor costs to reach a 50/50 split between material and labor. The strategies included exterior wall insulation plus energy upgrades as needed in the attic, mechanical and ventilation systems, and basement band joist, walls, and floors. The work can be integrated with other home improvements such as siding or window replacement. This strategy minimizes physical connections to existing wall studs, encapsulates existing siding materials (including lead paint) with spray foam, and creates a vented rain screen assembly to promote drying. GreenHomes America applied construction details created by IBACOS to a test home. 2x4 framing members were attached to the wall at band joists and top plates using 'L' clips, with spray foam insulating the wall after framing was installed. Windows were installed simultaneously with the framing, including extension jambs. The use of clips in specific areas provided the best strength potential, and 'picture framing' the spray foam held the 2x4s in place. Short-term testing was performed at this house, with monitoring equipment installed for long-term testing. Testing measurements will be provided in a later report, as well as utility impact (before and after), costs (labor and materials), construction time, standard specifications, and analysis for the exterior wall insulation strategy.

Herk, A.; Baker, R.; Prahl, D.

2014-03-01T23:59:59.000Z

315

Process for casting hard-faced, lightweight camshafts and other cylindrical products  

DOE Patents (OSTI)

A process for casting a hard-faced cylindrical product such as an automobile camshaft includes the steps of: (a) preparing a composition formed from a molten base metal and an additive in particle form and having a hardness value greater than the hardness value of the base metal; (b) introducing the composition into a flask containing a meltable pattern of a cylindrical product such as an automobile camshaft to be manufactured and encased in sand to allow the composition to melt the pattern and assume the shape of the pattern within the sand; and (c) rotating the flask containing the pattern about the longitudinal axes of both the flask and the pattern as the molten base metal containing the additive in particle form is introduced into the flask to cause particles of the additive entrained in the molten base metal to migrate by centrifugal action to the radial extremities of the pattern and thereby provide a cylindrical product having a hardness value greater at it's radial extremities than at its center when the molten base metal solidifies.

Hansen, Jeffrey S. (Corvallis, OR); Turner, Paul C. (Albany, OR); Argetsinger, Edward R. (Albany, OR); Wilson, Rick D. (Corvallis, OR)

1996-01-01T23:59:59.000Z

316

Stabilization of Electrocatalytic Metal Nanoparticles at Metal...  

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

Electrocatalytic Metal Nanoparticles at Metal-Metal Oxide-Graphene Triple Junction Points. Stabilization of Electrocatalytic Metal Nanoparticles at Metal-Metal Oxide-Graphene...

317

Apparatus for efficient sidewall containment of molten metal with horizontal alternating magnetic fields utilizing a ferromagnetic dam  

DOE Patents (OSTI)

An apparatus is disclosed for casting sheets of metal from molten metal. The apparatus includes a containment structure having an open side, a horizontal alternating magnetic field generating structure and a ferromagnetic dam. The magnetic field and the ferromagnetic dam contain the molten metal from leaking out side portions of the open side of the containment structure. 25 figs.

Praeg, W.F.

1997-02-11T23:59:59.000Z

318

Development of a thin steel strip casting process. Final report  

SciTech Connect

This is a comprehensive effort to develop direct strip casting to the point where a pilot scale program for casting carbon steel strip could be initiated. All important aspects of the technology were being investigated, however the program was terminated early due to a change in the business strategy of the primary contractor, Armco Inc. (focus to be directed at specialty steels, not low carbon steel). At termination, the project was on target on all milestones and under budget. Major part was casting of strip at the experiment casting facility. A new caster, capable of producing direct cast strip of up to 12 in. wide in heats of 1000 and 3000 lb, was used. A total of 81 1000-1200 lb heats were cast as well as one test heat of 3000 lb. Most produced strip of from 0.016 to 0.085 in. thick. Process reliability was excellent for short casting times; quality was generally poor from modern hot strip mill standards, but the practices necessary for good surface quality were identified.

Williams, R.S.

1994-04-01T23:59:59.000Z

319

Hanford's Simulated Low Activity Waste Cast Stone Processing  

SciTech Connect

Cast Stone is undergoing evaluation as the supplemental treatment technology for Hanfords (Washington) high activity waste (HAW) and low activity waste (LAW). This report will only cover the LAW Cast Stone. The programs used for this simulated Cast Stone were gradient density change, compressive strength, and salt waste form phase identification. Gradient density changes show a favorable outcome by showing uniformity even though it was hypothesized differently. Compressive strength exceeded the minimum strength required by Hanford and greater compressive strength increase seen between the uses of different salt solution The salt waste form phase is still an ongoing process as this time and could not be concluded.

Kim, Young

2013-08-20T23:59:59.000Z

320

Effect of different secondary quinoline insoluble content on the cellular structure of carbon foam derived from coal tar pitch  

Science Journals Connector (OSTI)

Abstract Carbon foam was produced using mesophase pitches obtained under different temperatures as precursors, via foaming and carbonization process. The physicochemical properties of mesophase pitch, as well as the microstructure and physical properties of carbon foam were investigated by optical microscope, infrared spectrometer, thermograviment analyzer (TGA), X-ray diffractometer (XRD), scanning electron microscope (SEM) and universal testing machine, respectively. The results show that the amount of secondary quinoline insoluble in mesophase pitches increase with heat-treatment temperature increase, meanwhile, the cell size of carbon foams increased firstly and then reduced. Moreover, the compressive strength of carbon foams also exhibited the same variation trend. The cellular structure of carbon foam can be severely affected by the secondary quinoline insoluble content of mesophase pitch; thus it is critical to tailor the secondary quinoline insoluble content of mesophase pitch for obtaining carbon foam with high performance.

Heguang Liu; Tiehu Li; Yachun Shi; Xilin Wang; Jing Lv; Wenjuan Zhang

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Computational study of laser imprint mitigation in foam-buffered inertial confinement fusion targets  

SciTech Connect

Recent experiments have shown that low density foam layers can significantly mitigate the perturbing effects of beam nonuniformities affecting the acceleration of thin shells. This problem is studied parametrically with two-dimensional LASNEX [G. B. Zimmerman and W. L. Kruer, Comments Plasma Phys. Controlled Fusion {bold 2}, 51 (1975)]. Foam-buffered targets are employed, consisting typically of 250 {Angstrom} of gold, and 50 {mu}m of 50mg/cm{sup 3} C{sub 10}H{sub 8}O{sub 4} foam attached to a 10 {mu}m foil. In simulation these were characteristically exposed to 1.2 ns, flat-topped green light pulses at 1.4{times}10{sup 14}W/cm{sup 2} intensity, bearing 30 {mu}m lateral perturbations of up to 60{percent} variation in intensity. Without the buffer layers the foils were severely disrupted by 1 ns. With buffering only minimal distortion was manifest at 3 ns. The smoothing is shown to derive principally from the high thermal conductivity of the heated foam. The simulation results imply that (1) the foam thickness should exceed the disturbance wavelength; (2) intensities exceeding 5{times}10{sup 13}W/cm{sup 2} are needed for assured stability beyond 2 ns; (3) longer foams at lower densities are needed for effective mitigation with shorter wavelength light; (4) the gold layer hastens conversion of the structured foam to a uniform plasma. {copyright} {ital 1998 American Institute of Physics.}

Mason, R.J.; Kopp, R.A.; Vu, H.X.; Wilson, D.C.; Goldman, S.R.; Watt, R.G. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Dunne, M. [Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR (United Kingdom)] [Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR (United Kingdom); Willi, O. [The Blackett Laboratory, Imperial College of Science and Technology, London SW72BZ (United Kingdom)] [The Blackett Laboratory, Imperial College of Science and Technology, London SW72BZ (United Kingdom)

1998-01-01T23:59:59.000Z

322

Bright x-ray sources from laser irradiation of foams with high concentration of Ti  

SciTech Connect

Low-density foams irradiated by a 20 kJ laser at the Omega laser facility (Laboratory for Laser Energetics, Rochester, NY, USA) are shown to convert more than 5% of the laser energy into 4.6 to 6.0?keV x rays. This record efficiency with foam targets is due to novel fabrication techniques based on atomic-layer-deposition of Ti atoms on an aerogel scaffold. A Ti concentration of 33 at.?% was obtained in a foam with a total density of 5?mg/cm{sup 3}. The dynamics of the ionization front through these foams were investigated at the 1 kJ laser of the Gekko XII facility (Institute for Laser Engineering, Osaka, Japan). Hydrodynamic simulations can reproduce the average electron temperature but fail to predict accurately the heat front velocity in the foam. This discrepancy is shown to be unrelated to the possible water adsorbed in the foam but could be attributed to effects of the foam micro-structure.

Prez, F., E-mail: perez75@llnl.gov; Patterson, J. R.; May, M.; Colvin, J. D.; Biener, M. M.; Wittstock, A.; Kucheyev, S. O.; Charnvanichborikarn, S.; Satcher, J. H.; Gammon, S. A.; Poco, J. F.; Fournier, K. B. [Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550 (United States); Fujioka, S.; Zhang, Z.; Ishihara, K.; Tanaka, N.; Ikenouchi, T.; Nishimura, H. [Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871 (Japan)] [Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871 (Japan)

2014-02-15T23:59:59.000Z

323

Report: EM Management Analysis and Strategic Vision-Casting  

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

Management Analysis and Strategic Vision-Casting Management Analysis and Strategic Vision-Casting September 25, 2008 Submitted by the EMAB Strategic Vision-Casting Subcommittee Background: In the course of developing the Environmental Management Advisory Board's (EMAB) fiscal year (FY) 2008 review topics, EM leadership and Board members recognized a need to re-examine the program's strategy and vision for the future, in order to better position EM and continue its momentum for clean-up and closure. This endeavor will also ensure that the next administration and current stakeholders are aligned with EM's proposed priorities, funding requirements, and commitments for 2009 and beyond. Consequently, the Board formed a Strategic Vision-Casting Subcommittee that was charged with the assignment of reviewing EM's current and past missions and strategic visions to assess

324

Cast Stainless Steel Aging Research Plan | Department of Energy  

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

Cast Stainless Steel Aging Research Plan Cast Stainless Steel Aging Research Plan Cast Stainless Steel Aging Research Plan This work plan proposes to build a systematic knowledge base for the thermal aging behavior of cast stainless steels (CASSs) within a limited time of five years. The final output of execution of the plan is expected to provide conclusive predictions for the integrity of the CASS components of LWR power plants during the extended service life up to and beyond 60 years. Mechanical and microstructural data obtained through accelerated aging experiment and computational simulation will be the key input for the prediction of CASS behaviors and for the integrity analyses for various CASS components. While the accelerated aging experiment and computational simulation results will comprise the main components of the knowledge base

325

Kin selection, genomics and caste-antagonistic pleiotropy  

Science Journals Connector (OSTI)

...Special feature 1001 14 70 Kin selection, genomics and caste-antagonistic pleiotropy David...evolution of social behaviours. The genomics revolution now provides the opportunity...Outlook: kin selection and social insect genomics The revolution in social insect genomics...

2013-01-01T23:59:59.000Z

326

Mold, flow, and economic considerations in high temperature precision casting  

E-Print Network (OSTI)

Casting high temperature alloys that solidify through a noticeable two phase region, specifically platinum-ruthenium alloys, is a particularly challenging task due to their high melting temperature and this necessitates ...

Humbert, Matthew S

2013-01-01T23:59:59.000Z

327

An Energy Savings Model for the Heat Treatment of Castings  

SciTech Connect

An integrated system of software, databases, and design rules have been developed, verified, and to be marketed to enable quantitative prediction and optimization of the heat treatment of aluminum castings to increase quality, increase productivity, reduce heat treatment cycle times and reduce energy consumption. The software predicts the thermal cycle in critical locations of individual components in a furnace, the evolution of microstructure, and the attainment of properties in heat treatable aluminum alloy castings. The model takes into account the prior casting process and the specific composition of the component. The heat treatment simulation modules can be used in conjunction with software packages for simulation of the casting process. The system is built upon a quantitative understanding of the kinetics of microstructure evolution in complex multicomponent alloys, on a quantitative understanding of the interdependence of microstructure and properties, on validated kinetic and thermodynamic databases, and validated quantitative models.

Y. Rong; R. Sisson; J. Morral; H. Brody

2006-12-31T23:59:59.000Z

328

Melt-solid interactions in laser cladding and laser casting  

Science Journals Connector (OSTI)

Experimental data in conjunction with mathematical models are used to explain various aspects of laser casting and laser cladding by the preplaced powder method. For increasing ... the powder bed is analyzed to i...

H. Gedda; A. Kaplan; J. Powell

2005-10-01T23:59:59.000Z

329

Marry for What? Caste and Mate Selection in Modern India  

E-Print Network (OSTI)

This paper analyzes how preferences for a noneconomic characteristic (e.g., caste) can affect equilibrium patterns of matching, and empirically evaluates this in the context of middle-class Indian arranged marriages. We ...

Banerjee, Abhijit

330

Methods for manufacturing monocrystalline or near-monocrystalline cast materials  

DOE Patents (OSTI)

Methods are provided for casting one or more of a semiconductor, an oxide, and an intermetallic material. With such methods, a cast body of a monocrystalline form of the one or more of a semiconductor, an oxide, and an intermetallic material may be formed that is free of, or substantially free of, radially-distributed impurities and defects and having at least two dimensions that are each at least about 35 cm.

Stoddard, Nathan G

2014-04-29T23:59:59.000Z

331

Metal Aminoboranes  

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

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

332

Structure of Liquid Films of an Ordered Foam Confined in a Narrow Channel  

Science Journals Connector (OSTI)

X-ray experiments highlighted the equality of the equilibrium thickness for each film within a foam. ... 14 Recent experiments performed by A. Le Goff and D. Qur revealed that this type of foam can stop solid particles without making burst films, which constitutes a useful tool to study the kinetic energy absorption properties in aqueous foams. ... The other part was filtered through a green optical filter (546 nm, bandpass 10 nm) and was collected in a Gamma scientific ocular equipped with a 450 ?m optic fiber probe. ...

Emmanuel Terriac; Franck Artzner; Alain Morac; Cristelle Meriadec; Patrick Chasle; Jean-Claude Ameline; Jrmy Ohana; Janine Emile

2007-10-19T23:59:59.000Z

333

Steam-foam pilot project in Dome-Tumbador, Midway-Sunset field  

SciTech Connect

This paper describes a steam-foam pilot project in the Potter sand, Midway-Sunset field. The pilot consists of four inverted five-spot patterns with a confined producer covering 5.2 acres (2.1 ha). Steam foam was generated by continuous injection of steam with NaCl, alpha olefin sodium sulfonate, and nitrogen. Production and subsurface data, obtained from two observation wells, were used as monitoring tools in the pilot. Overall, during the first 2 years of foam injection, 207,000 bbl (32 900 m/sup 3/) of incremental oil was produced.

Not Available

1989-02-01T23:59:59.000Z

334

Polyol-Based Rigid Urethane Foam Systems Kansas City Division  

Office of Scientific and Technical Information (OSTI)

A Study of Polyether-Polyol- and Polyester- A Study of Polyether-Polyol- and Polyester- Polyol-Based Rigid Urethane Foam Systems Kansas City Division J. P. Madden, G. K. Baker, and 6. H. Smith BDX-613-531 Published September 1971 Replacement Copy Delivered December 1994 Approved for public release; distribution is unlimited Prepared Under Contract Number DE-AC04-76-DP00613 for the United States Department of Energy tlHSTRI8UVON OF THlS DOCUMENT I S UNUMED f- DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus,

335

Plastic flow of foams and emulsions in a channel  

E-Print Network (OSTI)

In order to understand the flow profiles of complex fluids, a crucial issue concerns the emergence of spatial correlations among plastic rearrangements exhibiting cooperativity flow behaviour at the macroscopic level. In this paper, the rate of plastic events in a Poiseuille flow is experimentally measured on a confined foam in a Hele-Shaw geometry. The correlation with independently measured velocity profiles is quantified. To go beyond a limitation of the experiments, namely the presence of wall friction which complicates the relation between shear stress and shear rate, we compare the experiments with simulations of emulsion droplets based on the lattice-Boltzmann method, which are performed both with, and without, wall friction. Our results indicate a correlation between the localisation length of the velocity profiles and the localisation length of the number of plastic events. Finally, unprecedented results on the distribution of the orientation of plastic events show that there is a non-trivial correla...

Dollet, B; Sbragaglia, M

2014-01-01T23:59:59.000Z

336

Bubble Production Mechanism in a Microfluidic Foam Generator  

Science Journals Connector (OSTI)

We present the design and characterization of a microfluidic bubble generator that has the potential of producing monodisperse bubbles in 256 production channels that can operate in parallel. For a single production channel we demonstrate a production rate of up to 4kHz with a coefficient of variation of less than 1%. We observe a two-stage bubble production mechanism: initially the gas spreads onto a shallow terrace, and then overflows into a larger foam collection channel; pinning of the liquid-gas meniscus is observed at the terrace edge, the result being an asymmetric pinch-off. A semiempirical physical model predicts the scaling of bubble size with fluid viscosity and gas pressure from measurements of the pinned meniscus width.

M. Stoffel; S. Wahl; E. Lorenceau; R. Hhler; B. Mercier; D. E. Angelescu

2012-05-07T23:59:59.000Z

337

Activated carbon system cuts foaming and amine losses  

SciTech Connect

Alkanolamines have been successfully used to treat sour gas for removal of H/sub 2/S and CO/sub 2/ for over 30 years. More recently, alkanolamines have also been used to purify flue gas, liquid hydrocarbon streams and process gas streams. Acid gas must be scrubbed because of the lack of heating value of CO/sub 2/, the toxicity of H/sub 2/S and the corrosiveness of CO/sub 2/ and H/sub 2/S in wet gas. During the scrubbing process, other compounds which form degradation products are absorbed by the amine; these degradation products cause fouling of the amine, corrosion and foaming. Southwestern Refining Co., Inc., in Corpus Christi, Texas, installed a diethanolamine (DEA) treatment system to purify sour gas and liquid hydrocarbon streams in 1975. The amine unit was not used until May, 1982, however, because the sulfur content of the gas stream was low until then.

Keaton, M.M.; Bourke, M.J.

1983-08-01T23:59:59.000Z

338

Advanced Remedial Methods for Metals and Radionuclides in Vadose Zone Environments  

SciTech Connect

Functionally, the methods for addressing contamination must remove and/or reduce transport or toxicity of contaminants. This problem is particularly challenging in arid environments where the vadose zone can be up to hundreds of feet thick, rendering transitional excavation methods exceedingly costly and ineffective. Delivery of remedial amendments is one of the most challenging and critical aspects for all remedy-based approaches. The conventional approach for delivery is through injection of aqueous remedial solutions. However, heterogeneous vadose zone environments present hydrologic and geochemical challenges that limit the effectiveness. Because the flow of solution infiltration is dominantly controlled by gravity and suction, injected liquid preferentially percolates through highly permeable pathways, by-passing low-permeability zones which frequently contain the majority of the contamination. Moreover, the wetting front can readily mobilize and enhance contaminant transport to underlying aquifers prior to stabilization. Development of innovative, in-situ technologies may be the only way to meet remedial action objectives and long-term stewardship goals. Shear-thinning fluids (i.e., surfactants) can be used to lower the liquid surface tension and create stabile foams, which readily penetrate low permeability zones. Although surfactant foams have been utilized for subsurface mobilization efforts in the oil and gas industry, so far, the concept of using foams as a delivery mechanism for transporting reactive remedial amendments into deep vadose zone environments to stabilize metal and long-lived radionuclide contaminants has not been explored. Foam flow can be directed by pressure gradients, rather than being dominated by gravity; and, foam delivery mechanisms limit the volume of water (< 20% vol.) required for remedy delivery and emplacement, thus mitigating contaminant mobilization. We will present the results of a numerical modeling and integrated laboratory-/ intermediate-scale investigation to simulate, develop, demonstrate, and monitor (i.e. advanced geophysical techniques and advanced predictive biomarkers) foam-based delivery of remedial amendments to remediate metals and radionuclides in vadose zone environments.

Wellman, Dawn M.; Mattigod, Shas V.; Hubbard, Susan; Miracle, Ann L.; Zhong, Lirong; Foote, Martin; Wu, Yuxin; Jansik, Danielle P.

2010-10-03T23:59:59.000Z

339

Self-Similar Collapse of Stationary Bulk Foams Tad W. Patzek  

E-Print Network (OSTI)

), oil well drilling and workovers (Hutchinson and Anderson, 1972; Rand and Kraynik, 1983), and froth again. Preformed drilling foams are used to lift crushed rock, sand or mud, and their lifetimes

Patzek, Tadeusz W.

340

Low gas-liquid ratio foam flooding for conventional heavy oil  

Science Journals Connector (OSTI)

The recovery of heavy oil by water flooding is 10% lower than that of conventional crude oil, so enhanced oil recovery (EOR) is of great significance for heavy oil. In this paper, foam flooding with a gas-liqu...

Jing Wang; Jijiang Ge; Guicai Zhang; Baodong Ding; Li Zhang

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

APPLICATION OF POLYURETHANE FOAM FOR IMPACT ABSORPTION AND THERMAL INSULATION FOR GENERAL PURPOSE RADIOACTIVE MATERIALS PACKAGINGS  

SciTech Connect

Polyurethane foam has been employed in impact limiters for large radioactive materials packagings since the early 1980's. Its consistent crush response, controllable structural properties and excellent thermal insulating characteristics have made it attractive as replacement for the widely used cane fiberboard for smaller, drum size packagings. Accordingly, polyurethane foam was chosen for the overpack material for the 9977 and 9978 packagings. The study reported here was undertaken to provide data to support the analyses performed as part of the development of the 9977 and 9978, and compared property values reported in the literature with published property values and test results for foam specimens taken from a prototype 9977 packaging. The study confirmed that, polyurethane foam behaves in a predictable and consistent manner and fully satisfies the functional requirements for impact absorption and thermal insulation.

Smith, A; Glenn Abramczyk, G; Paul Blanton, P; Steve Bellamy, S; William Daugherty, W; Sharon Williamson, S

2009-02-18T23:59:59.000Z

342

Time domain terahertz detection of flaws within space shuttle sprayed on foam insulation  

Science Journals Connector (OSTI)

We demonstrate the detection of voids and disbonds intentionally incorporated within the sprayed on foam insulation of a space shuttle external tank mock-up segment using time domain...

Zimdars, David A; Valdmanis, Janis A; White, Jeffrey S; Winfree, William P; Madaras, Eric I; Stuk, G

343

Developing & tailoring multi-functional carbon foams for multi-field response  

E-Print Network (OSTI)

As technological advances occur, many conventional materials are incapable of providing the unique multi-functional characteristics demanded thus driving an accelerated focus to create new material systems such as carbon and graphite foams...

Sarzynski, Melanie Diane

2009-05-15T23:59:59.000Z

344

Mechanisms of nanoclay-enhanced plastic foaming processes: effects of nanoclay intercalation and exfoliation  

Science Journals Connector (OSTI)

The foaming behaviors of high-density polypropylenenanoclay composites with intercalated and exfoliated nanoclay particles blown with carbon dioxide were examined ... -temperature/high-pressure view-cell. The in...

Anson Wong; Stephan F. L. Wijnands; Takashi Kuboki

2013-07-01T23:59:59.000Z

345

Composites: Part B 44 (2013) 584591 584 Tensile Properties of Carbon Nanofiber Reinforced Multiscale Syntactic Foams  

E-Print Network (OSTI)

packing limit. The use of nanoclay and carbon nanofibers for matrix modification in syntactic foams that may be attributed to the large surface area of nanoclay platelets available to bonds with the resin

Gupta, Nikhil

346

A study on rigid foam/evacuated powder composite panels for thermal insulation  

Science Journals Connector (OSTI)

The present study investigates the feasibility of a composite panel: a series of individually evacuated panels incapsulated in a rigid closed cell foam matrix. The panels were encapsulated in a thin glass shee...

L. R. Glicksman; N. Solomou; J. K. Hong

1997-03-01T23:59:59.000Z

347

An experimental study of the heat transfer in PS foam insulation  

Science Journals Connector (OSTI)

Heat transfer mechanisms in 14 samples of vacuum insulation panels (VIPs) are examined to reveal the influence of porous foam structure on VIP performance. The samples were ... house equipment that was able to va...

Pen-Chang Tseng; Hsin-Sen Chu

2009-02-01T23:59:59.000Z

348

An Analytical Model for Determining the Thermal Conductivity of Closed-Cell Foam Insulation  

Science Journals Connector (OSTI)

The purpose of this paper is to present analytical methods and some preliminary test results for determining the thermal conductivity and net heat flow in closed-cell foam materials used as cryogenic insulation. ...

M. B. Hammond Jr.

1995-01-01T23:59:59.000Z

349

Foamed epoxy resin composite waterproofing and heat insulation in hydraulic construction  

Science Journals Connector (OSTI)

Laboratory and field tests and work on an experimental-industrial scale confimed the feasibility of using foamed epoxy resin heat insulation and waterproofing for protecting hydraulic engineering structures...

V. I. Sakharov

1969-05-01T23:59:59.000Z

350

E-Print Network 3.0 - abrogating foam cell Sample Search Results  

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

Mathematics 2 List of Publications 1. E. Amsterdam, P.R. Onck, J.Th.M. De Hosson. Fracture and microstructure of Summary: of open-cell aluminium foam. Journal of Materials...

351

E-Print Network 3.0 - aluminium foam core Sample Search Results  

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

Mathematics 5 List of Publications 1. E. Amsterdam, P.R. Onck, J.Th.M. De Hosson. Fracture and microstructure of Summary: of open-cell aluminium foam. Journal of Materials...

352

Sound insulation property of AlSi closed-cell aluminum foam sandwich panels  

Science Journals Connector (OSTI)

AlSi closed-cell aluminum foam sandwich panels (1240mmנ1100mm) of different thicknesses and different densities were prepared by molten body transitional foaming process in Northeastern University. The experiments were carried out to investigate the sound insulation property of AlSi closed-cell aluminum foam sandwich panels of different thicknesses and different densities under different frequencies (1004000Hz). Results show that sound reduction index (R) is small under low frequencies, large under high frequencies; thickness affects the sound insulation property of material obviously: when the thicknesses of AlSi closed-cell aluminum foam sandwich panels are 12, 22, and 32mm, the corresponding weighted sound reduction indices (RW) are 26.3, 32.2, and 34.6dB, respectively, the rising trend tempered; the increase of density of AlSi closed-cell aluminum foam can also increase the sound insulation property: when the densities of aluminum foam are 0.31, 0.51, and 0.67g/cm3, the corresponding weighted sound reduction indices (RW) are 28.9, 34.3, and 34.6dB, the increasing value mitigating.

Haijun Yu; Guangchun Yao; Xiaolin Wang; Yihan Liu; Hongbin Li

2007-01-01T23:59:59.000Z

353

Thermal Transport in Porous Media with Application to Fuel Cell Diffusion Media and Metal Foams  

E-Print Network (OSTI)

. of Mechanical Engineering, University of Victoria) Dr. David Sinton, Departmental Member (Dept. of Mechanical, University of Victoria) Dr. David Sinton, Departmental Member (Dept. of Mechanical Engineering, University

Victoria, University of

354

Mechanical behavior of closed-cell and hollow-sphere metallic foams  

E-Print Network (OSTI)

(cont.) The elastic anisotropy and yield surfaces are fully characterized, and numerical equations are developed to allow the simple evaluation of the effect of geometric and material properties on the mechanical behavior ...

Sanders, Wynn Steven, 1974-

2002-01-01T23:59:59.000Z

355

Transition Metal Oxide Nanoparticles Anchored Nanocarbon Hybrid Foam for High Performance Electrochemical Energy Storage Applications.  

E-Print Network (OSTI)

??In real life applications, supercapacitors (SCs) often can only be used as part of a hybrid system together with other high energy storage devices due (more)

Wang, Wei

2014-01-01T23:59:59.000Z

356

Casting of particle-based hollow shapes  

DOE Patents (OSTI)

A method for the production of hollow articles made of a particle-based material; e.g., ceramics and sintered metals. In accordance with one aspect of the invention, a thermally settable slurry containing a relatively high concentration of the particles is coated onto a prewarmed continuous surface in a relatively thin layer so that the slurry is substantially uniformly coated on the surface. The heat of the prewarmed surface conducts to the slurry to initiate a reaction which causes the slurry to set or harden in a shape conforming to the surface. The hardened configurations may then be sintered to consolidate the particles and provide a high density product.

Menchhofer, Paul (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

357

Fluid casting of particle-based articles  

DOE Patents (OSTI)

A method for the production of articles made of a particle-based material; e.g., ceramics and sintered metals. In accordance with one aspect of the invention, a thermally settable slurry containing a relatively high concentration of the particles is introduced into an immiscible, heated fluid. The slurry sets or hardens into a shape determined by the physical characteristics of the fluid and the manner of introduction of the slurry into the fluid. For example, the slurry is pulse injected into the fluid to provide spherical articles. The hardened spheres may then be sintered to consolidate the particles and provide a high density product.

Menchhofer, Paul (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

358

Casting of particle-based hollow shapes  

DOE Patents (OSTI)

A method for the production of hollow articles made of a particle-based material; e.g., ceramics and sintered metals. In accordance with one aspect of the invention, a thermally settable slurry containing a relatively high concentration of the particles is coated onto a prewarmed continuous surface in a relatively thin layer so that the slurry is substantially uniformly coated on the surface. The heat of the prewarmed surface conducts to the slurry to initiate a reaction which causes the slurry to set or harden in a shape conforming to the surface. The hardened configurations may then be sintered to consolidate the particles and provide a high density product.

Menchhofer, Paul (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

359

Casting a Light on California | Department of Energy  

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

Casting a Light on California Casting a Light on California Casting a Light on California October 28, 2010 - 4:00pm Addthis John Schueler John Schueler Former New Media Specialist, Office of Public Affairs What does this project do? Combined, the six projects will produce 2,837 megawatts of energy, enough to power 851,500 to 2.1 million homes, as well as create 3,700 new construction jobs and more than six hundred permanent plant operations positions. Yesterday, Secretary Salazar joined Gov. Arnold Schwarzenegger to celebrate the groundbreaking of the Ivanpah Solar Electric Generating System, an innovative "power tower" project in San Bernardino County, California. Located in Southern California's Mojave Desert, Ivanpah will use solar "power tower" technology to produce up to 370 megawatts of clean,

360

Casting a Light on California | Department of Energy  

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

Casting a Light on California Casting a Light on California Casting a Light on California October 28, 2010 - 4:00pm Addthis John Schueler John Schueler Former New Media Specialist, Office of Public Affairs What does this project do? Combined, the six projects will produce 2,837 megawatts of energy, enough to power 851,500 to 2.1 million homes, as well as create 3,700 new construction jobs and more than six hundred permanent plant operations positions. Yesterday, Secretary Salazar joined Gov. Arnold Schwarzenegger to celebrate the groundbreaking of the Ivanpah Solar Electric Generating System, an innovative "power tower" project in San Bernardino County, California. Located in Southern California's Mojave Desert, Ivanpah will use solar "power tower" technology to produce up to 370 megawatts of clean,

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


361

Thermal analysis of cast-resin dry-type transformers  

Science Journals Connector (OSTI)

Non-flammable characteristic of dry-type cast-resin transformers make them suitable for residential and hospital usages. However, because of resins property, thermal behavior of these transformers is undesirable, so it is important to analyze their thermal behavior. In this paper temperature distribution of cast-resin transformers is modeled by two different approaches. A FEM-based model which uses experimental-analytical formula for aircooling vertical ducts and a 3D finite volume based CFD model which is established in the ANSYS CFX software. In order to evaluate and compare the models, the simulation results were compared with the experimental data measured from an 800kVA transformer. Finally, the influences of some construction parameters and environmental conditions on temperature distribution of cast-resin transformers were discussed.

M. Eslamian; B. Vahidi; A. Eslamian

2011-01-01T23:59:59.000Z

362

Tape-cast sensors and method of making  

DOE Patents (OSTI)

A method of making electrochemical sensors in which an electrolyte material is cast into a tape. Prefabricated electrodes are then partially embedded between two wet layers of the electrolyte tape to form a green sensor, and the green sensor is then heated to sinter the electrolyte tape around the electrodes. The resulting sensors can be used in applications such as, but not limited to, combustion control, environmental monitoring, and explosive detection. A electrochemical sensor formed by the tape-casting method is also disclosed.

Mukundan, Rangachary (Santa Fe, NM); Brosha, Eric L. (Los Alamos, NM); Garzon, Fernando H. (Santa Fe, NM)

2009-08-18T23:59:59.000Z

363

Plaster Casts at Berkeley. Collections of the Hearst Museum of Anthropology & Department of Classics at UC Berkeley. An Exhibition of Rare Plaster Casts of Ancient Greek and Roman Sculpture. 2nd edition 2005, pp. vi + 76 + ii  

E-Print Network (OSTI)

Britain: An Oxford Story of Plaster Casts from the Antique (sculptor Lysistratos took plaster impressions not only fromPlaster Casts at Berkeley COLLECTIONS OF THE HEARST MUSEUM

Miller, Stephen G.

2005-01-01T23:59:59.000Z

364

Improving the manufacturing yield of investment cast turbine blades through robust design  

E-Print Network (OSTI)

The manufacturing of turbine blades is often outsourced to investment casting foundries by aerospace companies that design and build jet engines. Aerospace companies have found that casting defects are an important cost ...

Margetts, David (David Lawrence)

2008-01-01T23:59:59.000Z

365

Developments of cast superalloys and technology for gas turbine blades in BIAM  

Science Journals Connector (OSTI)

Since 1960's many important subjects relating to cast turbine blades including alloy developments, directional solidification (DS) and single crystal (SC) technique and casting technology for blades have been ...

R. Z. Chen

1995-09-01T23:59:59.000Z

366

Metal inks  

DOE Patents (OSTI)

Self-reducing metal inks and systems and methods for producing and using the same are disclosed. In an exemplary embodiment, a method may comprise selecting metal-organic (MO) precursor, selecting a reducing agent, and dissolving the MO precursor and the reducing agent in an organic solvent to produce a metal ink that remains in a liquid phase at room temperature. Metal inks, including self-reducing and fire-through metal inks, are also disclosed, as are various applications of the metal inks.

Ginley, David S; Curtis, Calvin J; Miedaner, Alex; van Hest, Marinus Franciscus Antonius Maria; Kaydanova, Tatiana

2014-02-04T23:59:59.000Z

367

'Dark Matter' as a Quantum Foam In-Flow Effect  

E-Print Network (OSTI)

The galactic `dark matter' effect is regarded as one of the major problems in fundamental physics. Here it is explained as a self-interaction dynamical effect of space itself, and so is not caused by an unknown form of matter. Because it was based on Kepler's Laws for the motion of the planets in the solar system the Newtonian theory of gravity was too restricted. A reformulation and generalisation of the Newtonian theory of gravity in terms of a velocity in-flow field, representing at a classical level the relative motion of a quantum-foam substructure to space, reveals a key dynamical feature of the phenomenon of gravity, namely the so called `dark matter' effect, which manifests not only in spiral galaxy rotation curves, but also in the borehole g anomaly, globular and galactic black holes, and in ongoing problems in improving the accuracy with which Newton's gravitational constant G is measured. The new theory of gravity involves an additional new dimensionless gravitational constant, and experimental data reveals this to be the fine structure constant. The new theory correctly predicts the globular cluster black hole masses, and that the `frame-dragging' effect is caused by vorticity in the in-flow. The relationship of the new theory of gravity to General Relativity which, like Newtonian gravity, does not have the `dark matter' dynamics, is explained.

Reginald T. Cahill

2005-08-25T23:59:59.000Z

368

Influence of pH of the BSA solutions on velocity of the rising bubbles and stability of the thin liquid films and foams  

Science Journals Connector (OSTI)

Influence of pH of the BSA solutions on velocity of the rising bubbles, stability of foams, and properties of single foam...IEP...=4.8) the BSA showed the highest surface activity. The equilibrium microscopic foa...

J. Zawala; R. Todorov; A. Olszewska; D. Exerowa; K. Malysa

2010-10-01T23:59:59.000Z

369

Cast Alloys for Advanced Ultra Supercritical Steam Turbines  

SciTech Connect

The proposed steam inlet temperature in the Advanced Ultra Supercritical (A-USC) steam turbine is high enough (760 C) that traditional turbine casing and valve body materials such as ferritic/martensitic steels will not suffice due to temperature limitations of this class of materials. Cast versions of several traditionally wrought Ni-based superalloys were evaluated for use as casing or valve components for the next generation of industrial steam turbines. The full size castings are substantial: 2-5,000 kg each half and on the order of 100 cm thick. Experimental castings were quite a bit smaller, but section size was retained and cooling rate controlled to produce equivalent microstructures. A multi-step homogenization heat treatment was developed to better deploy the alloy constituents. The most successful of these cast alloys in terms of creep strength (Haynes 263, Haynes 282, and Nimonic 105) were subsequently evaluated by characterizing their microstructure as well as their steam oxidation resistance (at 760 and 800 C).

G. R. Holcomb, P. Wang, P. D. Jablonski, and J. A. Hawk,

2010-05-01T23:59:59.000Z

370

Valid from Michaelmas 2009 1 2P3 Casting  

E-Print Network (OSTI)

between microstructure and a phase diagram Practical Skills 1. Melting and casting methods 2 handled tongs. 2. Remove the crucibles from the furnace after 1hour and stir with a graphite rod. Replace there is no possibility for any materials to be set alight by the molten alloy or any chance of contact with personnel. 5

Paxton, Anthony T.

371

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

372

Metal Oxides  

Science Journals Connector (OSTI)

Metal oxides are the class of materials having the widest application in gas sensors. This chapter presents information related to the application of various metal oxides in gas sensors designed on different p...

Ghenadii Korotcenkov

2013-01-01T23:59:59.000Z

373

Characterization of corrosive agents in polyurethane foams for thermal insulation of pipelines  

Science Journals Connector (OSTI)

Thermal insulated pipelines consists of a pipe, an optional anticorrosive coating, covered by rigid polyurethane (PU) foam and an outer casing made of high-density polyethylene (HDPE). In this paper, a methodology to investigate corrosion under thermal insulation and the compatibility between the polyurethane foams and anticorrosive coatings was developed. It consists of chemical, electrochemical and mass loss tests in aqueous extracts of the foams. The aqueous extracts were prepared according to an adaptation of ASTM C871 standard, taking into account the temperature range commonly employed in pipes operations of heavy petroleum derivatives. The chemical analysis of the extracts included pH, conductivity, phosphate, chloride and fluoride contents. Mass loss, electrochemical impedance and linear polarization were accomplished in autoclave. The influence of temperature, flame retardant and blowing agent was considered on the generation of corrosive agents. It was verified that the content of chloride in the foams is a very important parameter that must be controlled. Still in this paper, the compatibility of polyurethane foams with anticorrosive coatings is preliminary evaluated. The results show that investments on a proper coating selection are essential to guarantee good performance.

F.V.V. de Sousa; R.O. da Mota; J.P. Quintela; M.M. Vieira; I.C.P. Margarit; O.R. Mattos

2007-01-01T23:59:59.000Z

374

Experimental study on cryogenic moisture uptake in polyurethane foam insulation material  

Science Journals Connector (OSTI)

Rigid foam is widely used to insulate cryogenic tanks, in particular for space launch vehicles due to its lightweight, mechanical strength and thermal-insulating performance. Up to now, little information is available on the intrusion of moisture into the material under cryogenic conditions, which will bring substantial additional weight for the space vehicles at lift-off. A cryogenic moisture uptake apparatus has been designed and fabricated to measure the amount of water uptake into the polyurethane foam. One side of the specimen is exposed to an environment with high humidity and ambient temperature, while the other with cryogenic temperature at approximately 78K. A total of 16 specimens were tested for up to 24h to explore the effects of the surface thermal protection layer, the foam thickness, exposed time, the butt joints, and the material density on water uptake of the foam. The results are constructive for the applications of the foam to the cryogenic insulation system in space launch vehicles.

X.B. Zhang; L. Yao; L.M. Qiu; Z.H. Gan; R.P. Yang; X.J. Ma; Z.H. Liu

2012-01-01T23:59:59.000Z

375

Silicone metalization  

DOE Patents (OSTI)

A system for providing metal features on silicone comprising providing a silicone layer on a matrix and providing a metal layer on the silicone layer. An electronic apparatus can be produced by the system. The electronic apparatus comprises a silicone body and metal features on the silicone body that provide an electronic device.

Maghribi, Mariam N. (Livermore, CA); Krulevitch, Peter (Pleasanton, CA); Hamilton, Julie (Tracy, CA)

2006-12-05T23:59:59.000Z

376

DESIGN OF FOAM COVERING FOR ROBOTIC ARMS TO ENSURE HUMAN SAFETY Lingqi Zeng and Gary M. Bone  

E-Print Network (OSTI)

DESIGN OF FOAM COVERING FOR ROBOTIC ARMS TO ENSURE HUMAN SAFETY Lingqi Zeng and Gary M. Bone neglected coupling of the human head to the torso and the coupling of the robot arm to its base. The impact and maintain, which limits their applicability. Using foam to cover the robot arm surface is a simple

Bone, Gary

377

Energy Saving Melting and Revert Reduction Technology: Improved Die Casting Process to Preserve the Life of the Inserts  

SciTech Connect

The goal of this project was to study the combined effects of die design, proper internal cooling and efficient die lubricants on die life. The project targeted improvements in die casting insert life by: Optomized Die Design for Reduced Surface Temperature: The life of die casting dies is significantly shorter when the die is exposed to elevated temperature for significant periods of time. Any die operated under conditions leading to surface temperature in excess of 1050oF undergoes structural changes that reduce its strength. Optimized die design can improve die life significantly. This improvement can be accomplished by means of cooling lines, baffles and bubblers in the die. A key objective of the project was to establish criteria for the minimal distance of the cooling lines from the surface. This effort was supported with alloys and machining by BohlerUddeholm, Dunn Steel, HH Stark and Rex Buckeye. In plant testing and evaluation was conducted as in-kind cost share at St. Clair Die Casting. The Uddeholm Dievar steel evaluated in this program showed superior resistance to thermal fatigue resistance. Based on the experimental evidence, cooling lines could be placed as close as 0.5" from the surface. Die Life Extension by Optimized Die Lubrication: The life of die casting dies is affected by additions made to its surface with the proper lubricants. These lubricants will protect the surface from the considerable temperature peaks that occur when the molten melt enters the die. Dies will reach a significantly higher temperature without this lubricant being applied. The amount and type of the lubricant are critical variables in the die casting process. However, these lubricants must not corrode the die surface. This effort was supported with alloys and machining by BohlerUddeholm, Dunn Steel, HH Stark and Rex Buckeye. In plant testing and evaluation was conducted as in-kind cost share at St. Clair Die Casting. Chem- Trend participated in the program with die lubricants and technical support. Experiments conducted with these lubricants demonstrated good protection of the substrate steel. Graphite and boron nitride used as benchmarks are capable of completely eliminating soldering and washout. However, because of cost and environmental considerations these materials are not widely used in industry. The best water-based die lubricants evaluated in this program were capable of providing similar protection from soldering and washout. In addition to improved part quality and higher production rates, improving die casting processes to preserve the life of the inserts will result in energy savings and a reduction in environmental wastes. Improving die life by means of optimized cooling line placement, baffles and bubblers in the die will allow for reduced die temperatures during processing, saving energy associated with production. The utilization of optimized die lubricants will also reduce heat requirements in addition to reducing waste associated with soldering and washout. This new technology was predicted to result in an average energy savings of 1.1 trillion BTU's/year over a 10 year period. Current (2012) annual energy saving estimates, based on commercial introduction in 2010, a market penetration of 70% by 2020 is 1.26 trillion BTU's/year. Along with these energy savings, reduction of scrap and improvement in casting yield will result in a reduction of the environmental emissions associated with the melting and pouring of the metal which will be saved as a result of this technology. The average annual estimate of CO2 reduction per year through 2020 is 0.025 Million Metric Tons of Carbon Equivalent (MM TCE).

David Schwam, PI; Xuejun Zhu, Sr. Research Associate

2012-09-30T23:59:59.000Z

378

Materials Science and Engineering A, 2006. 417(1-2): p. 249-258 249 Investigation of Flexural Strength Properties of Rubber and Nanoclay Reinforced Hybrid Syntactic Foams  

E-Print Network (OSTI)

Strength Properties of Rubber and Nanoclay Reinforced Hybrid Syntactic Foams Rahul Maharsia* , Nikhil Gupta are developed by using rubber and nanoclay particles to modify the matrix microstructure in syntactic foams% by volume quantity. In nanoclay hybrid foams, volume of nanoclay particles is maintained at 2 and 5

Gupta, Nikhil

379

CYRANO CAST LIST: All Cast members need to be measured in the costume shop before semester break. Please  

E-Print Network (OSTI)

/s CHERESTANI); Katherine Schooler FULMINA; Jenna Jo Pawlicki TERRAMOTA; Marley Boone Peter Pan Cast List PETER Schenfisch MICHAEL: Forest Colson MR. DARLING: Avery Bell MRS. DARLING/ CAPTAIN HOOK: Jacqueline Wheeler SMEE/Ensemble Michael Barbour Launce/Ensemble Jacqueline Wheeler Lucetta/Ensemble Sarah Matthews Duke/Ensemble Jeremy

Liu, Taosheng

380

Validation of Heat Transfer Thermal Decomposition and Container Pressurization of Polyurethane Foam.  

SciTech Connect

Polymer foam encapsulants provide mechanical, electrical, and thermal isolation in engineered systems. In fire environments, gas pressure from thermal decomposition of polymers can cause mechanical failure of sealed systems. In this work, a detailed uncertainty quantification study of PMDI-based polyurethane foam is presented to assess the validity of the computational model. Both experimental measurement uncertainty and model prediction uncertainty are examined and compared. Both the mean value method and Latin hypercube sampling approach are used to propagate the uncertainty through the model. In addition to comparing computational and experimental results, the importance of each input parameter on the simulation result is also investigated. These results show that further development in the physics model of the foam and appropriate associated material testing are necessary to improve model accuracy.

Scott, Sarah Nicole; Dodd, Amanda B.; Larsen, Marvin E. [Sandia National Laboratories, Albuquerque, NM; Suo-Anttila, Jill M. [Sandia National Laboratories, Albuquerque, NM; Erickson, Kenneth L

2014-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Low density microcellular carbon or catalytically impregnated carbon foams and process for their preparation  

DOE Patents (OSTI)

Machinable and structurally stable, low density microcellular carbon, and catalytically impregnated carbon, foams, and process for their preparation, are provided. Pulverized sodium chloride is classified to improve particle size uniformity, and the classified particles may be further mixed with a catalyst material. The particles are cold pressed into a compact having internal pores, and then sintered. The sintered compact is immersed and then submerged in a phenolic polymer solution to uniformly fill the pores of the compact with phenolic polymer. The compact is then heated to pyrolyze the phenolic polymer into carbon in the form of a foam. Then the sodium chloride of the compact is leached away with water, and the remaining product is freeze dried to provide the carbon, or catalytically impregnated carbon, foam.

Hooper, R.W.; Pekala, R.W.

1987-04-30T23:59:59.000Z

382

8 - Bioactive glass and glassceramic foam scaffolds for bone tissue restoration  

Science Journals Connector (OSTI)

Abstract: One of the major goals of bone tissue engineering is the development of appropriate porous biomaterials (scaffolds) that can stimulate the bodys own regenerative mechanism, to induce tissue healing and self-repair. Bioactive glasses are excellent candidates for producing 3-D scaffolds, as their properties can be finely tailored depending on the glass composition, and they can bond to bone, inducing osteogenesis at the defect site. This chapter is focused on glass/glassceramic scaffolds characterized by foam-like architecture closely mimicking that of natural cancellous bone. After giving an overview of the features and limitations of the biomedical glass foams investigated in the literature, future directions of research will be described, emphasizing the challenge to develop multifunctional foams able to combine bone regeneration with special therapeutic functionalities.

F. Baino; C. Vitale-Brovarone

2014-01-01T23:59:59.000Z

383

Aging of polyurethane foam insulation in simulated refrigerator panels -- Initial results with third-generation blowing agents  

SciTech Connect

Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements -- HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and {minus}10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for about 250 days of aging for the core-foam specimens and for the first six months of aging for the full-thickness panels.

Wilkes, K.E.; Gabbard, W.A.; Weaver, F.J.

1998-11-01T23:59:59.000Z

384

Aging of Polyurethane Foam Insulation in Simulated Refrigerator Panels--One-Year Results with Third-Generation Blowing Agents  

SciTech Connect

Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements--HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and {minus}10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first year of a multi-year study for the full-thickness panels and for about 1-1/2 years of aging for the core-foam specimens.

Gabbard, W.A.; Weaver, F.J.; Wilkes, K.E.

1999-09-27T23:59:59.000Z

385

Technetium and Iodine Getters to Improve Cast Stone Performance  

SciTech Connect

To determine the effectiveness of the various getter materials prior to their solidification in Cast Stone, a series of batch sorption experiments was performed at Pacific Northwest National Laboratory. To quantify the effectiveness of the removal of Tc(VII) and I(I) from solution by getters, the distribution coefficient, Kd (mL/g), was calculated. Testing involved placing getter material in contact with spiked waste solutions at a 1:100 solid-to-solution ratio for periods up to 45 days with periodic solution sampling. One Tc getter was also tested at a 1:10 solid-to-solution ratio. Two different solution media, 18.2 M? deionized water (DI H2O) and a 7.8 M Na LAW simulant, were used in the batch sorption tests. Each test was conducted at room temperature in an anoxic chamber containing N2 with a small amount of H2 (0.7%) to maintain anoxic conditions. Each getter-solution combination was run in duplicate. Three Tc- and I-doping concentrations were used separately in aliquots of both the 18.2 M? DI H2O and a 7.8 M Na LAW waste simulant. The 1 concentration was developed based on Hanford Tank Waste Operations Simulator (HTWOS) model runs to support the River Protection Project System Plan Revision 6. The other two concentrations were 5 and 10 of the HTWOS values. The Tc and I tests were run separately (i.e., the solutions did not contain both solutes). Sampling of the solid-solution mixtures occurred nominally after 0.2, 1, 3, 6, 9, 12, 15 days and ~35 to 45 days. Seven getter materials were tested for Tc and five materials were tested for I. The seven Tc getters were blast furnace slag 1 (BFS1) (northwest source), BFS2 (southeast source), Sn(II)-treated apatite, Sn(II) chloride, nano tin phosphate, KMS (a potassium-metal-sulfide), and tin hydroxapatite. The five iodine getters were layered bismuth hydroxide (LBH), argentite mineral, synthetic argentite, silver-treated carbon, and silver-treated zeolite. The Tc Kd values measured from experiments conducted using the 7.8 M Na LAW simulant (the simulant selected to represent LAW) for the first 15 days for four Tc getters (BFS1, BFS2, Sn(II)-treated apatite, and Sn(II) chloride) show no, to a very small, capacity to remove Tc from the LAW simulant. For the Tc-getter experiments in the 7.8 M LAW simulant, the majority of the effluent samples show very small drops in Tc concentrations for the 35-day compared to the 15-day samplings. However, the Tc concentration in the simulant blanks also dropped slightly during this period, so the effect of the getter contacting LAW simulant at 35 days compared to 15 days is minimal; except that the BFS1 1:10 test shows a slow but steady decrease in Tc concentration in the LAW simulant supernatant from the beginning to the 35 day contact at which point about 20% of the original Tc has been removed from solution. Lastly, the KMS getter gives the highest Kd value for Tc at 35 days where Kd values have increased to 104 mL/g. When considering the different I getters reacting with the 7.8 M LAW simulant, two getters are much more effective than the others: Ag zeolite and Syn Arg. The other getters have calculated iodide distribution coefficients that show very limited effectiveness in the caustic conditions created by the LAW simulant. These are preliminary results that will need more detailed analyses including both pre- and post-batch sorption getter solid-phase characterization using state-of-the-art instrumentation such as synchrotron X ray absorption spectroscopy, which can delineate the oxidation state of the Tc and likely iodine species as well as some of the getters key major components, sulfur and iron in the BFS, and tin and sulfur in the tin-bearing and sulfur-bearing getters. This report also describes future experimental studies to be performed to better elucidate the mechanisms controlling the Tc and I sequestration processes in the various getters and leach tests of getter-bearing Cast Stone monoliths.

Qafoku, Nikolla; Neeway, James J.; Lawter, Amanda R.; Levitskaia, Tatiana G.; Serne, R. Jeffrey; Westsik, Joseph H.; Snyder, Michelle MV

2014-07-01T23:59:59.000Z

386

Application of Spray Foam Insulation Under Plywood and Oriented Strand Board Roof Sheathing  

SciTech Connect

Unvented roof strategies with open cell and closed cell spray polyurethane foam insulation sprayed to the underside of roof sheathing have been used since the mid-1990's to provide durable and efficient building enclosures. However, there have been isolated moisture related incidents reported anecdotally that raise potential concerns about the overall hygrothermal performance of these systems. The incidents related to rainwater leakage and condensation concerns. Condensation concerns have been extensively studied by others and are not further discussed in this report. This project involved hygrothermal modeling of a range of rainwater leakage and field evaluations of in-service residential roofs using spray foam insulation. All of the roof assemblies modeled exhibited drying capacity to handle minor rainwater leakage. All field evaluation locations of in-service residential roofs had moisture contents well within the safe range for wood-based sheathing. Explorations of eleven in-service roof systems were completed. The exploration involved taking a sample of spray foam from the underside of the roof sheathing, exposing the sheathing, then taking a moisture content reading. All locations had moisture contents well within the safe range for wood-based sheathing. One full-roof failure was reviewed, as an industry partner was involved with replacing structurally failed roof sheathing. In this case the manufacturer's investigation report concluded that the spray foam was installed on wet OSB based on the observation that the spray foam did not adhere well to the substrate and the pore structure of the closed cell spray foam at the ccSPF/OSB interface was indicative of a wet substrate.

Grin, A.; Smegal, J.; Lstiburek, J.

2013-10-01T23:59:59.000Z

387

Key Findings of Liquefied Natural Gas Pool Fire Outdoor Tests with Expansion Foam Application  

Science Journals Connector (OSTI)

(12, 13) These tests identified that a foam application rate of 10 L/minm2 is effective for LNG pool fire control on concrete containment pits. ... (17) As seen in Figure 5, the flame height increased steadily up to 13.13 m during free burn (36 s period); subsequently, foam was applied at 37 s. ... Subsequently, the level changes were converted into the mass-burning rate using the LNG density (450 kg/m3?(18, 19)) and the dimensions of the pit. ...

Geunwoong Yun; Dedy Ng; M. Sam Mannan

2011-01-19T23:59:59.000Z

388

Rigid Polyurethane Foam (RPF) Technology for Countermines (Sea) Program Phase II  

SciTech Connect

This Phase II report documents the results of one subtask initiated under the joint Department of Energy (DOE)/Department of Defense (DoD) Memorandum of Understanding (MOU) for Countermine Warfare. The development of Rigid Polyurethane Foams for neutralization of mines and barriers in amphibious assault was the objective of the tasking. This phase of the program concentrated on formation of RPF in water, explosive mine simulations, and development of foam and fabric pontoons. Field experimentation was done primarily at the Energetic Materials Research and Testing Center (EMRTC) of the New Mexico Institute of Mining and Technology, Socorro, NM between February 1996 and September 1998.

WOODFIN,RONALD L.; FAUCETT,DAVID L.; HANCE,BRADLEY G.; LATHAM,AMY E.; SCHMIDT,C.O.

1999-10-01T23:59:59.000Z

389

METALLURGICAL EVALUATION OF CAST DUPLEX STAINLESS STEELS AND THEIR WELDMENTS  

Office of Scientific and Technical Information (OSTI)

FINAL REPORT FINAL REPORT VOLUME 1 METALLURGICAL EVALUATION OF CAST DUPLEX STAINLESS STEELS AND THEIR WELDMENTS SUBMITTED TO U. S. DEPARTMENT OF ENERGY Award Number - DE-FC36-00 ID13975 OCTOBER 1, 2000 - SEPTEMBER 30, 2005 SONGQING WEN CARL D. LUNDIN GREG BATTEN MATERIALS JOINING GROUP MATERIALS SCIENCE AND ENGINEERING THE UNIVERSITY OF TENNESSEE, KNOXVILLE CARL D. LUNDIN PROFESSOR OF METALLURGY MATERIALS JOINING GROUP MATERIALS SCIENCE AND ENGINEERING THE UNIVERSITY OF TENNESSEE KNOXVILLE 37996-2200 TELEPHONE (865) 974-5310 FAX (865) 974-0880 lundin@utk.edu This is Volume 1of 5 of the final report for The Department of Energy Grant # DE-FC36-00 ID13975 entitled "Behavior of Duplex Stainless Steel Castings." ii FOREWARD

390

Selecting copper and copper alloys; Part 2: Cast products  

SciTech Connect

This article provides an introduction to the properties, characteristics, and applications of cast coppers and copper alloys. An overview of alloy families is presented since it is impractical to describe all 130 standard grades in detail. However, additional technical information is readily available from the Copper Development Assn. Inc. (CDA) and the resources listed in the references and bibliography at the end of the article. Copper casting alloys are primarily selected for either their corrosion resistance, or their combination of corrosion resistance and mechanical properties. The materials also feature good castability, high machinability, and, compared with other corrosion-resistant alloys, reasonable cost. Additional benefits include biofouling resistance--important in marine applications--and a spectrum of attractive colors. Many of the alloys also have favorable tribological properties, which explains their widespread use for sleeve bearings, wear plates, gears, and other wear-prone components.

Peters, D.T. (Copper Development Association Inc., New York, NY (United States)); Kundig, K.J.A. (Kundig (Konrad J.A.), Randolph, NJ (United States))

1994-06-01T23:59:59.000Z

391

Laser-Ultrasonic Inspection of MG/AL Castings  

SciTech Connect

Laser-ultrasonics is used to assess the metallurgical bond between Mg/Al materials in die-cast Magnesium/Aluminum composite. The acoustic impedances of Mg, Al and air are such that the amplitude of ultrasonic echoes reflected back from a void is many times larger than the amplitude of those reflected back from a well-bonded interface. In addition, the polarity of echoes from a void is inverted compared to that from a well-bonded interface. Laser-ultrasonic F-SAFT is also used for imaging tilted Mg/Al interfaces. Experimental setup, signal processing and results for detecting voids in the Mg/Al interface of cast parts are presented.

Blouin, Alain; Levesque, Daniel; Monchalin, Jean-Pierre [Industrial Materials Institute, National Research Council Canada, 75 de Mortagne blvd, Boucherville, Quebec, J4B 6Y4 (Canada); Baril, Eric [Noranda Inc., 2250 Alfred Nobel blvd, St-Laurent, Quebec, H4S 2C9 (Canada); Fischersworring-Bunk, Andreas [BMW Group, Hufelandstr.8a, 80788 Munich (Germany)

2005-04-09T23:59:59.000Z

392

Sensitivity of Steel Casting Simulation Results to Alloy Property Datasets  

E-Print Network (OSTI)

1 Sensitivity of Steel Casting Simulation Results to Alloy Property Datasets Kent D. Carlson dataset; Ni-based alloys N3M, CW6MC and CW12MW can be represented by the benchmark CW12MW dataset; and Ni-based alloys M30C and M35-1 can be represented by the benchmark M35-1 dataset. While these alloy groupings

Beckermann, Christoph

393

3D Rendering and Ray Casting Michael Kazhdan  

E-Print Network (OSTI)

3D Rendering and Ray Casting Michael Kazhdan (600.357 / 600.457) HB Ch. 13.7, 14.6 FvDFH 15.5, 15.10 #12;Rendering · Generate an image from geometric primitives Rendering Geometric Primitives (3D) Raster Image (2D) #12;3D Rendering Example What issues must be addressed by a 3D rendering system? #12;Overview

Kazhdan, Michael

394

Axion helioscopes update: the status of CAST and IAXO  

E-Print Network (OSTI)

Almost 35 years since their suggestion as a good solution to the strong CP-problem, axions remain one of the few viable candidates for the Dark Matter, although still eluding detection. Most of the methods for their detection are based on their coupling to photons, one of the most sensitive ones being the helioscope technique. We report on the current status of the CERN Axion Solar Telescope and the future International Axion Observatory (IAXO). Recent results from the second part of CAST phase II, where the magnet bores were filled with 3He gas at variable pressure achieving sensibilities on the axion mass up to 1.2 eV, are presented. Currently, CAST is expecting to improve its sensitivity to solar axions with rest mass below 0.02 eV/c^2 after the upgrade of the X-ray detectors and with the implementation of a second X-ray optic. At the same time, it is exploring other possibilities at the low energy physics frontier. On the other hand IAXO, the fourth generation axion helioscope, aims to improve CAST's perf...

Dafni, T

2015-01-01T23:59:59.000Z

395

Axion helioscopes update: the status of CAST and IAXO  

E-Print Network (OSTI)

Almost 35 years since their suggestion as a good solution to the strong CP-problem, axions remain one of the few viable candidates for the Dark Matter, although still eluding detection. Most of the methods for their detection are based on their coupling to photons, one of the most sensitive ones being the helioscope technique. We report on the current status of the CERN Axion Solar Telescope and the future International Axion Observatory (IAXO). Recent results from the second part of CAST phase II, where the magnet bores were filled with 3He gas at variable pressure achieving sensibilities on the axion mass up to 1.2 eV, are presented. Currently, CAST is expecting to improve its sensitivity to solar axions with rest mass below 0.02 eV/c^2 after the upgrade of the X-ray detectors and with the implementation of a second X-ray optic. At the same time, it is exploring other possibilities at the low energy physics frontier. On the other hand IAXO, the fourth generation axion helioscope, aims to improve CAST's performance in terms of axion-photon coupling by 1-1.5 orders of magnitude. The details of the project building a dedicated magnet, optics and X-ray detectors are given.

T. Dafni; F. J. Iguaz; on behalf of the CAST; IAXO collaborations

2015-01-07T23:59:59.000Z

396

Surfactant Based Enhanced Oil Recovery and Foam Mobility Control  

SciTech Connect

Surfactant flooding has the potential to significantly increase recovery over that of conventional waterflooding. The availability of a large number of surfactant structures makes it possible to conduct a systematic study of the relation between surfactant structure and its efficacy for oil recovery. A mixture of two surfactants was found to be particularly effective for application in carbonate formations at low temperature. The mixture is single phase for higher salinity or calcium concentrations than that for either surfactant used alone. This makes it possible to inject the surfactant slug with polymer close to optimal conditions and yet be single phase. A formulation has been designed for a particular field application. It uses partially hydrolyzed polyacrylamide for mobility control. The addition of an alkali such as sodium carbonate makes possible in situ generation of naphthenic soap and significant reduction of synthetic surfactant adsorption. The design of the process to maximize the region of ultra-low IFT takes advantage of the observation that the ratio of soap to synthetic surfactant is a parameter in the conditions for optimal salinity. Even for a fixed ratio of soap to surfactant, the range of salinity for low IFT was wider than that reported for surfactant systems in the literature. Low temperature, forced displacement experiments in dolomite and silica sandpacks demonstrate that greater than 95% recovery of the waterflood remaining oil is possible with 0.2% surfactant concentration, 0.5 PV surfactant slug, with no alcohol. Compositional simulation of the displacement process demonstrates the role of soap/surfactant ratio on passage of the profile through the ultralow IFT region, the importance of a wide salinity range of low IFT, and the importance of the viscosity of the surfactant slug. Mobility control is essential for surfactant EOR. Foam is evaluated to improve the sweep efficiency of surfactant injected into fractured reservoirs as well as a drive fluid for ASP flooding. UTCHEM is a reservoir simulator specially designed for surfactant EOR. It has been modified to represent the effects of a change in wettability produced by surfactant injection.

George J. Hirasaki; Clarence A. Miller

2006-09-09T23:59:59.000Z

397

GASAR porous metals process control  

SciTech Connect

GASAR porous metals are produced by melting under a partial pressure of hydrogen and then casting into a mold that ensures directional solidification. Hydrogen is driven out of solution and usually grows as quasi-cylindrical pores normal to the solidification front. Experiments with pure nickel have been carried out under processing conditions of varying H{sub 2} partial pressure, total pressure (H{sub 2} + Ar), and superheat. An analysis that considers heterogeneous bubble nucleation was developed that identifies processing conditions in which hydrogen bubbles are stable in the liquid before solidification. It is hypothesized that these conditions lead to low porosity because these bubbles float out of the melt and escape the advancing solidification front. Experimental data are shown to support this hypothesis.

Apprill, J.M.; Poirier, D.R. [Univ. of Arizona, Tucson, AZ (United States); Maguire, M.C. [Sandia National Labs., Albuquerque, NM (United States); Gutsch, T.C. [California State Univ., Chico, CA (United States)

1998-12-31T23:59:59.000Z

398

Design and development of a multi-shot foam projectile toy  

E-Print Network (OSTI)

The goal of this research was to design and develop a working prototype of a new toy for Hasbro's Nerfe line of foam projectile toys. Several years ago, Hasbro approached the MIT CADlab about developing a new method for ...

Skaggs, Alan M. (Alan Michael)

2007-01-01T23:59:59.000Z

399

Society of Petroleum Engineers Simulation of Foam Transport in Porous Media  

E-Print Network (OSTI)

Society of Petroleum Engineers SPE 26402 Simulation of Foam Transport in Porous Media A.R. Kovscek, T.W. Patzek, and C.J. Radke, U. of California SPE Members Copyright 1993, Society of Petroleum and Exhibition of the Society of Petroleum Engineers held in Houston, Texas, 3-6 October 1993. This paper

Patzek, Tadeusz W.

400

High-expansion foam for LNG vapor mitigation. Topical report, September 1987-December 1989  

SciTech Connect

One of the purposes of these high expansion foam systems is to reduce the extent of the hazardous vapor cloud generated during an accidental LNG release. Should the LNG ignite, these systems serve the additional function of controlling the LNG fire and minimizing its radiation to the surroundings. Foam generators have been installed along the tops of dike walls surrounding some LNG storage tanks, and around other fenced containment areas where LNG may be accidentally released, such as LNG pump pits and pipe rack trenches. To date there are no technically justifiable guidelines for the design and installation of these systems. Furthermore, there are no models that may be used describe the vapor source so as to be able to predict the reduction in the hazardous vapor cloud zone when high expansion foam is applied to an LNG spill. Information is essential not only for the optimal design of high expansion foam systems, but also for comparing the cost effectiveness of alternative LNG vapor mitigation measures.

Atallah, S.; Shah, J.N.; Peterlinz, M.E.

1990-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Fusion Engineering and Design 81 (2006) 455460 Breeder foam: an innovative low porosity solid breeder material  

E-Print Network (OSTI)

Fusion Engineering and Design 81 (2006) 455­460 Breeder foam: an innovative low porosity solid@ucla.edu (S. Sharafat). breeder pebble beds remains a field of intense R&D for fusion power reactor B.V. All rights reserved. doi:10.1016/j.fusengdes.2005.06.374 #12;456 S. Sharafat et al. / Fusion

Ghoniem, Nasr M.

402

Removal of oil from water using polyurethane foam modified with nanoclay  

Science Journals Connector (OSTI)

Abstract To enhance the removal of oil contaminants from water, polyurethane foam structure was modified by integrating cloisite 20A nanoclay into it. Pure and modified polyurethane foams (nanocomposite adsorbents) were then characterized using scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy tests. Optimum weight fraction of the added cloisite 20A to the foam structure was 3wt%, improving the sorption capacity up to 16% and oil removal efficiency up to 56% in wateroil system. The reusability feature of blank polyurethane and nanocomposites with 3wt% and 4wt% of cloisite 20A nanoclay was studied through chemical regeneration by toluene and petroleum ether. In the case of structurally modified polyurethane foams with nanoclay (nanocomposites), chemical regeneration reduced the oil removal efficiency, but improved the adsorption capacity in the range of low to medium oil initial concentration and reduced it in high oil initial concentrations. A comparison between the obtained adsorption data and adsorption isotherm models, including Langmuir, Freundlich and RedlichPeterson, showed a good agreement with Langmuir and RedlichPeterson models.

Amir Ahmad Nikkhah; Hamid Zilouei; Ahmad Asadinezhad; Alireza Keshavarz

2015-01-01T23:59:59.000Z

403

Two-dimensional flows of foam: drag exerted on circular obstacles and dissipation  

E-Print Network (OSTI)

A Stokes experiment for foams is proposed. It consists in a two-dimensional flow of a foam, confined between a water subphase and a top plate, around a fixed circular obstacle. We present systematic measurements of the drag exerted by the flowing foam on the obstacle, \\emph{versus} various separately controlled parameters: flow rate, bubble volume, solution viscosity, obstacle size and boundary conditions. We separate the drag into two contributions, an elastic one (yield drag) at vanishing flow rate, and a fluid one (viscous coefficient) increasing with flow rate. We quantify the influence of each control parameter on the drag. The results exhibit in particular a power-law dependence of the drag as a function of the solution viscosity and the flow rate with two different exponents. Moreover, we show that the drag decreases with bubble size, increases with obstacle size, and that the effect of boundary conditions is small. Measurements of the streamwise pressure gradient, associated to the dissipation along the flow of foam, are also presented: they show no dependence on the presence of an obstacle, and pressure gradient depends on flow rate, bubble volume and solution viscosity with three independent power laws.

Benjamin Dollet; Florence Elias; Catherine Quilliet; Arnaud Huillier; Miguel Aubouy; Francois Graner

2004-11-22T23:59:59.000Z

404

Effect of Anisotropic Volume Change in Tin Phosphate Nanoparticle Anode Material with Mesocellular Foam Structure  

E-Print Network (OSTI)

, PO = propylene oxide . This material has a mesocelluar foam structure. Experimental Pluronic P123 10 g, BASF were dissolved in 40 mL of distilled water into which 8.8 g of H3PO4 had been previously

Cho, Jaephil

405

Synthesis and characterization of melamineformaldehyde rigid foams for vacuum thermal insulation  

Science Journals Connector (OSTI)

Abstract A novel core material for vacuum thermal insulation, the melamineformaldehyde (MF) rigid foam was processed from an emulsion of the melamineformaldehyde resin at temperatures between 130C and 150C, using pentane as the blowing agent. The achieved porosity was between 92% and 98%. Open pore structure with desired mechanical properties was achieved by variations of the initial chemical composition of liquid reactants and controlled foaming and hardening, employing classical heating. The average pore size was determined directly by SEM and indirectly by measuring the thermal conductivity in a wide pressure range from 10?3mbar to the atmosphere. Optimization of the synthesis resulted in the base thermal conductivity equal to only 0.006Wm?1K?1 and an extremely low outgassing rate. The long-term pressure-rise measurements indicate that these MF rigid foams could be the first organic candidates applied as the core material in Vacuum Insulating Panels (VIPs) whose performance may be comparable to selected inorganic core materials. Their further advantages compared to conventional organic foams are their stability, as they can withstand a temperature in excess of 200C, and good fire resistance.

V. Nemani?; B. Zajec; M. umer; N. Figar; M. Kavek; I. Miheli?

2014-01-01T23:59:59.000Z

406

Elaboration And Characterization Of Foam Glass Based On Cullet With Addition Of Soluble Silicates  

SciTech Connect

The politics of the energy saving and of the acoustic comfort buildings is at the heart of the research of new compounds permitting to improve the materials performance actually commercialised. With this aim in view, we'll purpose to elaborate a porous material (foam glass) with addition of soluble silicates (up to 40%) of which the principal material is the waste glass in order to recycle it and improving the present laws about the waste products in closed circuit: (Finished products (leftarrow) waste products (leftarrow) finished products). The investigations have shown that grinding waste glass to particle size less than 0.1 mm and adding 1% of Ca CO{sub 3} content provide production of material with the following properties: particle density 0,5 g/cm{sup 3}, strength 17,50 MPa and water adsorption 95%, the temperature for foaming ranges were determined at 850 deg. C. The microstructures are homogenous, with pore sizes up to 2 mm. The addition of soluble silicates (up to 40%) has resulted in the foam glass of very high porosity. The foam glass is counted among the new glass products meeting certain requirements sought comfort in the building industry in particular (thermal and acoustic insulation). The product obtained present of excellent properties thermal ({lambda} = 0,031 W/m deg. C) and acoustic (R = 15 dB).

Ayadi, A.; Stiti, N.; Benhaoua, F.; Boumchedda, K.; Lerari, Y. [Laboratory of mineral materials and composite, Faculty of Engineering Sciences, University of Boumerdes (Algeria)

2011-01-17T23:59:59.000Z

407

Geophysical Monitoring of Foam used to Deliver Remediation1 Treatments within the Vadose Zone2  

E-Print Network (OSTI)

for transport of pollutants from the ground surface37 to ground water. Contaminants in the vadose zone1 Geophysical Monitoring of Foam used to Deliver Remediation1 Treatments within the Vadose Zone2 3 amendments into the vadose zone for in situ11 remediation; it is an approach being considered for in situ

Hubbard, Susan

408

Aging of polyurethane insulation foamed with second- and third-generation blowing agents  

SciTech Connect

Results are presented on two studies of the effect of aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators. Both studies are cooperative projects between the Oak Ridge National Laboratory and the Appliance Research Consortium. The first study has been ongoing for four years and involves evaluation of second generation blowing agents: HCFC-141b and HCFC-142/22 blend with CFC-11 for comparison. The second study has recently started and involves third generation blowing agents: HFC-134a, HFC-245fa. and cyclopentane with HCFC-141b for comparison. Both studies consist of periodic thermal measurements on panels made with solid steel and/or plastic skins and a core of foam to simulate refrigerator walls, and measurements on thin slices with cut faces to characterize the core foam. Laboratory data are presented on four years of aging of panels containing second generation blowing agents. Preliminary data are presented for the third generation blowing agents. The data on panels are compared with predictions of computer models of foam aging.

Wilkes, K.E.; Gabbard, W.A.; Weaver, F.J.

1998-05-01T23:59:59.000Z

409

Liquid meniscus friction on a wet plate: Bubbles, lamellae and foams Isabelle Cantat  

E-Print Network (OSTI)

. For enhanced oil recovery [1­3], or soil remediation [4], liquid foams are pushed into porous media to displace]; innovative set-ups are developed to control bubbles motion in micro-channels for lab-on-a-chip applications

Paris-Sud XI, Université de

410

A free boundary problem modeling a foam drainage Thierry Colin and Pierre Fabrie,  

E-Print Network (OSTI)

.1) where is given by = C 2g Ai . Here is the coefficient of surface tension, C = 3 - /2 is a complex porous medium which consists in a set of gaz bubbles which faces are liquid films that contain in order to understand the stability properties of the foam, which has many industrial applications (see [6

Colin, Thierry

411

Foam drainage control using thermocapillary stress in a two-dimensional microchamber. V. Miralles1  

E-Print Network (OSTI)

an interface between two fluids due to a temperature-induced surface tension gradient. We demonstrate in manufacturing such discrete materials is to con- trol the foam stabilization [10�12], or destabilization [13, 14 the liquid films, and iii) coalescence of neighboring bubbles [15]. Although microflu- idics has proven

Boyer, Edmond

412

Heat dissipating nuclear reactor with metal liner  

DOE Patents (OSTI)

Disclosed is a nuclear reactor containment including a reactor vessel disposed within a cavity with capability for complete inherent decay heat removal in the earth and surrounded by a cast steel containment member which surrounds the vessel. The member has a thick basemat in contact with metal pilings. The basemat rests on a bed of porous particulate material, into which water is fed to produce steam which is vented to the atmosphere. There is a gap between the reactor vessel and the steel containment member. The containment member holds any sodium or core debris escaping from the reactor vessel if the core melts and breaches the vessel.

Gluekler, Emil L. (San Jose, CA); Hunsbedt, Anstein (Los Gatos, CA); Lazarus, Jonathan D. (Sunnyvale, CA)

1987-01-01T23:59:59.000Z

413

Challenges and Capabilities for Inspection of Cast Stainless Steel Piping  

SciTech Connect

Studies conducted at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington, have focused on developing and evaluating the reliability of nondestructive examination (NDE) approaches for inspecting coarse-grained, cast stainless steel reactor components. The objective of this work is to provide information to the United States Nuclear Regulatory Commission (US NRC) on the utility, effectiveness and limitations of NDE techniques as related to the inservice inspection of primary system piping components in pressurized water reactors (PWRs). This paper describes results from recent assessments built upon early work with low frequency ultrasonic testing (UT) coupled with synthetic aperture focusing technique (SAFT) signal processing, and has subsequently evolved into an approach using low frequency phased array technology as applied from the outer diameter surface of the piping. In addition, eddy current examination as performed from the inner diameter surface of these piping welds is also reported. Cast stainless steel (CSS) pipe specimens were examined that contain thermal and mechanical fatigue cracks located close to the weld roots and have inside/outside surface geometrical conditions that simulate several PWR primary piping weldments and configurations. In addition, segments of vintage centrifugally cast piping were also examined to understand inherent acoustic noise and scattering due to grain structures and determine consistency of UT responses from different locations. The advanced UT methods were applied from the outside surface of these specimens using automated scanning devices and water coupling. The phased array approach was implemented with a modified instrument operating at low frequencies and composite volumetric images of the samples were generated with 500 kHz, 750 kHz, and 1.0 MHz arrays. Eddy current studies were conducted on the inner diameter surface of these piping welds using a commercially available instrument and a cross point probe design operating at a frequency of 250 kHz. Results from the laboratory studies indicate that 500 kHz phased array methods are capable of detecting flaws greater than 30% through-wall in the cast specimens. Length-sizing of flaws is possible, but no diffracted signals could be observed to support time-of-flight depth sizing. The work with eddy current examinations on the inner diameter surface indicate that, while certain cast austenitic microstructures provide excessive background noise due to permeability variations, surface-breaking flaws are quite easily detected. This work was sponsored by the U.S. Nuclear Regulatory Commission under Contract DE-AC06-76RLO 1830; NRC JCN Y6604; Mr. Wallace Norris, NRC Project Monitor.

Anderson, Michael T.; Crawford, Susan L.; Cumblidge, Stephen E.; Diaz, Aaron A.; Doctor, Steven R.

2007-12-31T23:59:59.000Z

414

Inorganic-Organic Shape Memory Polymers and Foams for Bone Defect Repairs  

E-Print Network (OSTI)

revised solvent casting particulate leaching (SCPL) method. By tailoring scaffold parameters including salt fusion, macromer concentration and salt size, scaffold properties (e.g. pore features, compressive modulus and shape memory behavior) were tuned...

Zhang, Dawei

2013-04-16T23:59:59.000Z

415

Treatment of concentrated industrial wastewaters originating from oil shale and the like by electrolysis polyurethane foam interaction  

DOE Patents (OSTI)

Highly concentrated and toxic petroleum-based and synthetic fuels wastewaters such as oil shale retort water are treated in a unit treatment process by electrolysis in a reactor containing oleophilic, ionized, open-celled polyurethane foams and subjected to mixing and laminar flow conditions at an average detention time of six hours. Both the polyurethane foams and the foam regenerate solution are re-used. The treatment is a cost-effective process for waste-waters which are not treatable, or are not cost-effectively treatable, by conventional process series.

Tiernan, Joan E. (Novato, CA)

1990-01-01T23:59:59.000Z

416

Accumulated CFC-11 in polyurethane foam insulation: an estimate of the total amount in district heating installations in Sweden  

Science Journals Connector (OSTI)

In rigid polyurethane foam used for thermal insulation, CFC-11 has been the main blowing agent for many years, but is now subject to phase-out regulations. During ageing of this foam, air diffuses into it and blowing agents leak into the atmosphere, resulting in a decreased insulating capacity. Determinations of the cell gas composition and the total content of CFC-11 in foam from district heating installations of different ages are reported in this paper. The total amount of CFC-11 in old district heating schemes in Sweden is estimated at 2000 tonnes. The amount in refrigeration equipment in Sweden is about twice as large.

M. Svanstrom

1996-01-01T23:59:59.000Z

417

Reaction-Forming Method for Producing Near Net-Shape Refractory Metal Carbides  

DOE Patents (OSTI)

A method for reaction forming refractory metal carbides. The method involves the fabrication of a glassy carbon preform by casting an organic, resin-based liquid mixture into a mold and subsequently heat treating it in two steps, which cures and pyrolizes the resin resulting in a porous carbon preform. By varying the amounts of the constituents in the organic, resin-based liquid mixture, control over the density of the carbon preform is obtained. Control of the density and microstructure of the carbon preform allows for determination of the microstructure and properties of the refractory metal carbide material produced. The glassy carbon preform is placed on a bed of refractory metal or refractory metal--silicon alloy. The pieces are heated above the melting point of the metal or alloy. The molten metal wicks inside the porous carbon preform and reacts, forming the refractory metal carbide or refractory metal carbide plus a minor secondary phase.

Palmisiano, Marc N.; Jakubenas, Kevin J.; Baranwal, Rita

2004-07-20T23:59:59.000Z

418

National Metal Casting Research Institute final report. Volume 1, Sand reclamation  

SciTech Connect

A mobile thermal foundry sand reclamation unit was designed and constructed. This unit consisted of thermal and mechanical sand reclamation equipment installed on the bed of a 50 foot low-boy trailer. It was transported to a number of Midwest foundries for on-site demonstration of the sand reclamation process. This allowed participating foundries to have their own refuse sand (10-100 tons) processed and then reused in production for evaluation. The purpose for building the unit was to demonstrate to foundries through ``hands on`` experience that refuse sands can be reclaimed and successfully reused particularly in regard to product quality. Most of the participating foundries indicated a high level of satisfaction with the reclaimed sand. Laboratory testing of samples of the used sand, before and after processing by the demonstration unit, verified the usability of the reclaimed sand. One of the foundries participating was a brass foundry, the sand from this foundry contained lead and is classified as a hazardous material. After reclamation the sand was no longer hazardous and could also be reused in the foundry.

Vondra, L.F.; Burningham, J.S. [University of Northern Iowa, Cedar Falls, IA (United States). Dept. of Industrial Technology

1995-08-01T23:59:59.000Z

419

ITP Metal Casting: Theoretical/Best Practice Energy Use in Metalcastin...  

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

TheoreticalBest Practice Energy Use In Metalcasting Operations J. F. Schifo J.T. Radia KERAMIDA Environmental, Inc. Indianapolis, IN May 2004 Prepared under Contract to Advanced...

420

FY 2009 Progress Report for Lightweighting Materials- 3. Automotive Metals- Cast  

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

The primary Lightweight Materials activity goal is to validate a cost-effective weight reduction in total vehicle weight while maintaining safety, performance, and reliability.

Note: This page contains sample records for the topic "foam metal casting" 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

ITP Metal Casting: Theoretical/Best Practice Energy Use in Metalcasting Operations  

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

This study determined the theoretical minimum energy requirements for melting processes for all ferrous and noferrous engenieering alloys. Also the report details the Best Practice energy consumption for the industry.

422

FY 2008 Progress Report for Lightweighting Materials- 3. Automotive Metals-Cast  

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

Lightweighting Materials focuses on the development and validation of advanced materials and manufacturing technologies to reduce automobile weight without compromising other attributes.

423

Cast polycrystalline silicon photovoltaic module manufacturing technology improvements. Annual subcontract report, 1 January 1996--31 December 1996  

SciTech Connect

This report describes Solarex`s accomplishments during this phase of the Photovoltaic Manufacturing Technology (PVMaT) program. During this reporting period, Solarex researchers converted 79% of production casting stations to increase ingot size and operated them at equivalent yields and cell efficiencies; doubled the casting capacity at 20% the cost of buying new equipment to achieve the same capacity increase; operated the wire saws in a production mode with higher yields and lower costs than achieved on the ID saws; purchased additional wire saws; developed and qualified a new wire-guide coating material that doubles the wire-guide lifetime and produces significantly less scatter in wafer thickness; ran an Al paste back-surface-field process on 25% of all cells in manufacturing; completed environmental qualification of modules using cells produced by an all-print metallization process; qualified a vendor-supplied Tedlar/ethylene vinyl acetate (EVA) laminate to replace the combination of separate sheets of EVA and Tedlar backsheet; substituted RTV adhesive for the 3M Very High Bond tape after several field problems with the tape; demonstrated the operation of a prototype unit to trim/lead attach/test modules; demonstrated the use of light soldering for solar cells; demonstrated the operation of a wafer pull-down system for cassetting wet wafers; and presented three PVMaT-related papers at the 25th IEEE Photovoltaic Specialists Conference.

Wohlgemuth, J. [Solarex Corp., Frederick, MD (United States)

1997-10-01T23:59:59.000Z

424

Metal oxide films on metal  

DOE Patents (OSTI)

A structure including a thin film of a conductive alkaline earth metal oxide selected from the group consisting of strontium ruthenium trioxide, calcium ruthenium trioxide, barium ruthenium trioxide, lanthanum-strontium cobalt oxide or mixed alkaline earth ruthenium trioxides thereof upon a thin film of a noble metal such as platinum is provided.

Wu, Xin D. (Los Alamos, NM); Tiwari, Prabhat (Los Alamos, NM)

1995-01-01T23:59:59.000Z

425

Residual stress measurement on ductile cast iron using critically refracted longitudinal (Lcr) wave technique  

E-Print Network (OSTI)

using ultrasonics was approached. Residual stresses in castings are developed for various reasons. The presence of these stresses, coupled with applied stresses in service, sometimes results in the yield of material and subsequent failure of component.... Present work was focussed on development of an ultrasonic technique using critically refracted longitudinal (L g waves for evaluating residual stresses in ductile cast iron. An L probe suitable to work with ductile cast iron was designed and fabricated...

Chundu, Srinivasulu Naidu

2012-06-07T23:59:59.000Z

426

Technical Letter Report Assessment of Ultrasonic Phased Array Testing for Cast Austenitic Stainless Steel Pressurizer Surge Line Piping Welds and Thick Section Primary System Cast Piping Welds JCN N6398, Task 2A  

SciTech Connect

Research is being conducted for the NRC at PNNL to assess the effectiveness and reliability of advanced NDE methods for the inspection of LWR components. The scope of this research encompasses primary system pressure boundary materials including cast austenitic stainless steels (CASS), dissimilar metal welds (DMWs), piping with corrosion-resistant cladding, weld overlays, and far-side examinations of austenitic piping welds. A primary objective of this work is to evaluate various NDE methods to assess their ability to detect, localize, and size cracks in coarse-grained steel components. This interim technical letter report (TLR) provides a synopsis of recent investigations at PNNL aimed at evaluating the capabilities of phased-array (PA) ultrasonic testing (UT) methods as applied to the inspection of CASS welds in nuclear reactor piping. A description of progress, recent developments and interim results are provided.

Diaz, Aaron A.; Denslow, Kayte M.; Cinson, Anthony D.; Morra, Marino; Crawford, Susan L.; Prowant, Matthew S.; Cumblidge, Stephen E.; Anderson, Michael T.

2008-07-21T23:59:59.000Z

427

Die casting research. Annual progress report, June 29, 1994--June 30, 1995  

SciTech Connect

Cr carbide and other CVD coatings were evaluated for improving wear resistance of Al and Zn die casting dies; die cavity instrumentation was also studied.

Brevick, J.; Mobley, C.; Shivpuri, R.; Goodwin, F.

1995-07-31T23:59:59.000Z

428

Cooling slope casting to produce EN AW 6082 forging stock for manufacture of suspension components  

Science Journals Connector (OSTI)

Abstract The potential of cooling slope casting process to produce EN AW 6082 forging stock for the manufacture of EN AW 6082 suspension components was investigated. EN AW 6082 billets cast over a cooling plate offer a fine uniform structure that can be forged even without a separate homogenization treatment. This is made it possible by the limited superheat of the melt at the start of casting and the fractional solidification that occurs already on the cooling plate. Suspension parts forged from cast and homogenized billets with or without Cr all showed a uniform structure, and the hardness reached HV 110 after the standard artificial ageing treatment.

Yucel BIROL; Seracettin AKDI

2014-01-01T23:59:59.000Z

429

E-Print Network 3.0 - alloy-graphite castings technical Sample...  

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

Materials Science 8 Simulation of Hot Tearing and Distortion during Casting of Steel: Comparison with Experiments Summary: Simulation of Hot Tearing and Distortion during...

430

E-Print Network 3.0 - aluminum casting technology Sample Search...  

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

summarizes attempts of incorporating fly ash into aluminum castings to decrease the energy content, material... . It is shown that fly ash can be incorporated in aluminum...

431

E-Print Network 3.0 - aluminum die casting Sample Search Results  

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

summarizes attempts of incorporating fly ash into aluminum castings to decrease the energy content, material... . It is shown that fly ash can be incorporated in ... Source:...

432

E-Print Network 3.0 - aluminum shape casting Sample Search Results  

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

summarizes attempts of incorporating fly ash into aluminum castings to decrease the energy content, material... . It is shown that fly ash can be incorporated in aluminum...

433

Low-Cost Magnesium Sheet Production using the Twin Roll Casting...  

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

using the Twin Roll Casting Process and Asymmetric Rolling 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

434

Aging of Polyurethane Foam Insulation in Simulated Refrigerator Panels--Three-Year Results with Third-Generation Blowing Agents  

SciTech Connect

Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements--HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and -10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first three years of a multi-year aging study. Preliminary comparisons of measured data with predictions of a mathematical aging model are presented.

Wilkes, K.E.

2001-05-29T23:59:59.000Z

435

Aging of Polyurethane Foam Insulation in Simulated Refrigerator Panels--Two-Year Results with Third-Generation Blowing Agents  

SciTech Connect

Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements--HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and {minus}10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first two years of a multi-year aging study. Preliminary comparisons of measured data with predictions of a mathematical aging model are presented.

Wilkes, K.E.

2001-02-14T23:59:59.000Z

436

Experience gained from the use of polyurethane foam-insulated pipelines at OAO Moscow Heating-Network Company  

Science Journals Connector (OSTI)

Results from 10 years of experience using polyurethane foam-insulated pipelines at OAO Moscow Heating-Network Co. are presented. It is shown that the failure rate of such pipelines is considerably lower than t...

V. I. Kashinskii; V. M. Lipovskikh; Ya. G. Rotmistrov

2007-07-01T23:59:59.000Z

437

Hydrolytic ageing of syntactic foams for thermal insulation in deep water: degradation mechanisms and water uptake model  

Science Journals Connector (OSTI)

This paper focuses on a novel syntactic foam formulation based on a model diepoxy-diamine matrix with a controlled architecture, discusses the factors governing the long-term performance of these materials and...

V. Sauvant-Moynot; N. Gimenez; H. Sautereau

2006-07-01T23:59:59.000Z

438

Detection of space shuttle insulation foam defects by using a 0.2 THz Gunn diode oscillator and pyroelectric detector  

Science Journals Connector (OSTI)

We report detection of space shuttle insulation foam defects by using a 0.2 THz Gunn diode oscillator as the light source, and a pyroelectric camera as the detector. The size and...

Zhong, Hua; Karpowicz, Nick; Xu, Jingzhou; Deng, Yanqing; Ussery, Warren; Shur, Michael; Zhang, Xi-Cheng

439

Elasticity of a cryo-insulation polymer foam coating in the temperature range 8293 K  

Science Journals Connector (OSTI)

An apparatus is developed for investigating the dynamic deformation properties of cryoinsulation coatings in the temperature range 8293 K. One type of cryo-insulation material polyurethane foam is chosen as ...

L. A. Bulavin; Yu. F. Zabashta; A. Ya. Fridman; A. I. Kostyuk

1999-02-01T23:59:59.000Z

440

Adsorbent for metal ions and method of making and using  

DOE Patents (OSTI)

A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles in a liquid, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size in the range of 1 to 500 micrometers, said particles being active towards Cs ions. The particles, which can be of a single salt or a combination of salts, can be used free flowing, in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove Cs ions from aqueous solutions.

White, Lloyd R. (Minneapolis, MN); Lundquist, Susan H. (White Bear Township, MN)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Adsorbent for metal ions and method of making and using  

DOE Patents (OSTI)

A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles in a liquid, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size in the range of 1 to 500 micrometers, said particles being active towards Cs ions. The particles, which can be of a single salt or a combination of salts, can be used free flowing, in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove Cs ions from aqueous solutions.

White, Lloyd R. (Minneapolis, MN); Lundquist, Susan H. (White Bear Township, MN)

2000-01-01T23:59:59.000Z

442

Metal Toxicity  

Science Journals Connector (OSTI)

Problems posed to plants by metal toxicity in the soils of the world are basically of two kinds. The first kind are of natural origin. These arise either as a consequence of the nature of the parent material f...

T. McNeilly

1994-01-01T23:59:59.000Z

443

Combustion Synthesis Of Ultralow-density Nanoporous Gold Foams  

SciTech Connect

A new synthetic pathway for producing nanoporous gold monoliths through combustion synthesis from Au bistetrazoJeamine complexes has been demonstrated. Applications of interest for Au nanofoams include new substrates for nanoparticle-mediated catalysis, embedded antennas, and spectroscopy. Integrated support-and-catalystin-one nanocomposites prepared through combustion synthesis of mixed AuBTA/metal oxide pellets would also be an interesting technology approach for low-cost in-line catalytic conversion media. Furthermore, we envision preparation of ultrahigh surface area gold electrodes for application in electrochemical devices through this method.

Tappan, Bruce C [Los Alamos National Laboratory; Mueller, Alex H [Los Alamos National Laboratory; Steiner, Stephen A [Los Alamos National Laboratory; Luther, Erik P [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

444

Dendritic metal nanostructures  

DOE Patents (OSTI)

Dendritic metal nanostructures made using a surfactant structure template, a metal salt, and electron donor species.

Shelnutt, John A. (Tijeras, NM); Song, Yujiang (Albuquerque, NM); Pereira, Eulalia F. (Vila Nova de Gaia, PT); Medforth, Craig J. (Winters, CA)

2010-08-31T23:59:59.000Z

445

Textures in Strip-Cast Aluminum Alloys: Their On-Line Monitoring and Quantitative Effects on Formability. Final Technical Report  

SciTech Connect

Aluminum sheets produced by continuous casting (CC) provide energy and economic savings of at least 25 and 14 percent, respectively, over sheets made from conventional direct chill (DC) ingot casting and rolling. As a result of the much simpler production route in continuous casting, however, the formability of CC aluminum alloys is often somewhat inferior to that of their DC counterparts. The mechanical properties of CC alloys can be improved by controlling their microstructure through optimal thermomechanical processing. Suitable annealing is an important means to improve the formability of CC aluminum alloy sheets. Recrystallization of deformed grains occurs during annealing, and it changes the crystallographic texture of the aluminum sheet. Laboratory tests in this project showed that this texture change can be detected by either laser-ultrasound resonance spectroscopy or resonance EMAT (electromagnetic acoustic transducer) spectroscopy, and that monitoring this change allows the degree of recrystallization or the ''recrystallized fraction'' in an annealed sheet to be ascertained. Through a plant trial conducted in May 2002, this project further demonstrated that it is feasible to monitor the recrystallized state of a continuous-cast aluminum sheet in-situ on the production line by using a laser-ultrasound sensor. When used in conjunction with inline annealing, inline monitoring of the recrystallized fraction by laser-ultrasound resonance spectroscopy offers the possibility of feed-back control that helps optimize processing parameters (e.g., annealing temperature), detect production anomalies, ensure product quality, and further reduce production costs of continuous-cast aluminum alloys. Crystallographic texture strongly affects the mechanical anisotropy/formability of metallic sheets. Clarification of the quantitative relationship between texture and anisotropy/formability of an aluminum alloy will render monitoring and control of its texture during the sheet production process even more meaningful. The present project included a study to determine how the anisotropic plastic behavior of a continuous-cast AA 5754 aluminum alloy depends on quantifiable texture coefficients. Formulae which show explicitly the effects of texture on the directional dependence of the q-value (a formability parameter) and of the uniaxial flow stress, respectively, were derived. Measurements made on a batch of as-received AA 5754 hot band and its O-temper counterpart corroborate the validity of these formulae. On the other hand, these measurements also indicate that some microstructure(s) other than texture could play a significant role in the plastic anisotropy of the AA 5754 alloy. For the q-value of a set of O-temper samples of this alloy, the additional microstructure that affects plastic anisotropy was shown to be grain shape. A formula that captures both the effects of crystallographic texture and grain shape on the q-value of the O-temper material was derived. A simple quadratic plastic potential that delivers this q-value formula was written down. Verification of the adequacy of this plastic potential, however, requires further investigations.

Man, Chi-Sing

2003-07-27T23:59:59.000Z

446

Development of Cost-Effective Low-Permeability Ceramic and Refractory Components for Aluminum Melting and Casting  

SciTech Connect

A recent review by the U.S. Advanced Ceramics Association, the Aluminum Association, and the U.S. Department of Energy's Office of Industrial Technologies (DOE/OIT) described the status of advanced ceramics for aluminum processing, including monolithics, composites, and coatings. The report observed that monolithic ceramics (particularly oxides) have attractive properties such as resistance to heat, corrosion, thermal shock, abrasion, and erosion [1]. However, even after the developments of the past 25 years, there are two key barriers to commercialization: reliability and cost-effectiveness. Industry research is therefore focused on eliminating these barriers. Ceramic coatings have likewise undergone significant development and a variety of processes have been demonstrated for applying coatings to substrates. Some processes, such as thermal barrier coatings for gas turbine engines, exhibit sufficient reliability and service life for routine commercial use. Worldwide, aluminum melting and molten metal handling consumes about 506,000 tons of refractory materials annually. Refractory compositions for handling molten aluminum are generally based on dense fused cast silica or mullite. The microstructural texture is extremely important because an interlocking mass of coarser grains must be bonded together by smaller grains in order to achieve adequate strength. At the same time, well-distributed microscopic pores and cracks are needed to deflect cracks and prevent spalling and thermal shock damage [2]. The focus of this project was to develop and validate new classes of cost-effective, low-permeability ceramic and refractory components for handling molten aluminum in both smelting and casting environments. The primary goal was to develop improved coatings and functionally graded materials that will possess superior combinations of properties, including resistance to thermal shock, erosion, corrosion, and wetting. When these materials are successfully deployed in aluminum smelting and casting operations, their superior performance and durability will give end users marked improvements in uptime, defect reduction, scrap/rework costs, and overall energy savings resulting from higher productivity and yield. The implementation of results of this program will result in energy savings of 30 trillion Btu/year by 2020. For this Industrial Materials for the Future (IMF) project, riser tube used in the low-pressure die (LPD) casting of aluminum was selected as the refractory component for improvement. In this LPD process, a pressurized system is used to transport aluminum metal through refractory tubes (riser tubes) into wheel molds. It is important for the tubes to remain airtight because otherwise, the pressurized system will fail. Generally, defects such as porosity in the tube or cracks generated by reaction of the tube material with molten aluminum lead to tube failure, making the tube incapable of maintaining the pressure difference required for normal casting operation. Therefore, the primary objective of the project was to develop a riser tube that is not only resistant to thermal shock, erosion, corrosion, and wetting, but is also less permeable, so as to achieve longer service life. Currently, the dense-fused silica (DFS) riser tube supplied by Pyrotek lasts for only 7 days before undergoing failure. The following approach was employed to achieve the goal: (1) Develop materials and methods for sealing surface porosity in thermal-shock-resistant ceramic refractories; (2) Develop new ceramic coatings for extreme service in molten aluminum operations, with particular emphasis on coatings based on highly stable oxide phases; (3) Develop new monolithic refractories designed for lower-permeability applications using controlled porosity gradients and particle size distributions; (4) Optimize refractory formulations to minimize wetting by molten aluminum, and characterize erosion, corrosion, and spallation rates under realistic service conditions; and (5) Scale up the processing methods to full-sized components and perform field testi

Kadolkar, Puja [ORNL; Ott, Ronald D [ORNL

2006-02-01T23:59:59.000Z

447

Reduction in Young`s modulus of aluminum foams due to cell wall curvature and corrugation  

SciTech Connect

Measurements of the Young`s modulus and compressive strength of several closed-cell aluminum foams indicate that they are lower than expected from models for foam behavior. Microstructural characterization has revealed that there are a number of defects in the cell structure which may contribute to the reduction in mechanical properties. These include: cell wall curvature, cell wall corrugations, density variations and non-equiaxed cell shape. Finite element analysis of a closed-cell tetrakaidecahedral unit cell with idealized curved or corrugated cell walls indicates that these two types of defects can reduce the Young`s modulus and compressive strength by up to 70%. In this paper the authors report the results of measurements of the curvature of the cell walls and of the amplitude and frequency of corrugations in the cell walls and use simple bounds to estimate the reduction in modulus that they are responsible for.

Sanders, W.; Gibson, L.J. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering

1998-12-31T23:59:59.000Z

448

Tailoring properties of carbon-nanotube-based foams by ion bombardment  

SciTech Connect

Particle irradiation is an effective method for manipulating properties of individual carbon nanotubes (CNTs). This potential, however, remains unexplored for macroscopic assemblies of cross-linked CNTs. Here, we study structural and electrical properties of ultralow-density cross-linked CNT-based nanofoams exposed to ion irradiation at room temperature over a wide range of ion masses and fluences. For all irradiation conditions studied, the electrical resistance of nanofoams initially increases with a rate that scales with the number of ballistically generated displacements. This process is attributed to the buildup of defects in graphitic nanoligaments. Irradiation with Ne and heavier ions leads to a decrease in the electrical resistance at large fluences, which is attributed to radiation-induced foam densification. In addition, heavy-ion bombardment causes amorphization of CNTs and smoothing of ligament surfaces. These results demonstrate that ion bombardment can be used for tailoring density, ligament morphology, and electrical properties of CNT-based foams.

Charnvanichborikarn, S.; Shin, S. J.; Worsley, M. A.; Kucheyev, S. O. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2012-09-03T23:59:59.000Z

449

Electromagnetic confinement and movement of thin sheets of molten metal  

DOE Patents (OSTI)

An apparatus capable of producing a combination of magnetic fields that can retain a metal in liquid form in a region having a smooth vertical boundary including a levitation magnet that produces low frequency magnetic field traveling waves to retain the metal and a stabilization magnet that produces a high frequency magnetic field to produce a smooth vertical boundary. As particularly adapted to the casting of solid metal sheets, a metal in liquid form can be continuously fed into one end of the confinement region produced by the levitation and stabilization magnets and removed in solid form from the other end of confinement region. An additional magnet may be included for support at the edges of the confinement region where eddy currents loop.

Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

1990-01-01T23:59:59.000Z

450

Study of the Electronic and Optical Properties of Hybrid Triangular (BN)xCy Foams  

Science Journals Connector (OSTI)

Study of the Electronic and Optical Properties of Hybrid Triangular (BN)xCy Foams ... Recently, several novel three-dimensional (3D) network models constituted by all sp2-hybridized bonds(1-3) or sp2sp3 hybridized bonds(3-7) are explored by first-principles calculations. ... We thank the computational resources and assistance provided by the Swedish National Infrastructure for Computing (SNIC) and the State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University). ...

Xinrui Cao; Yi Luo

2014-09-02T23:59:59.000Z

451

Development of a Foam OTEC System. Final technical report for Fiscal Year 1979  

SciTech Connect

Research on Development of a Foam OTEC System, as carried out at Carnegie-Mellon University from October 1, 1978 through September 30, 1979, is described. To a brief section summarizing highlights of research results are appended 12 technical reports which detail specific sections of the program. The work described is continuing and a proposal is currently being submitted to provide support in fiscal 1980.

Not Available

1980-01-01T23:59:59.000Z

452

Atomistic modeling of nanowires, small-scale fatigue damage in cast magnesium, and materials for MEMS.  

SciTech Connect

Lightweight and miniaturized weapon systems are driving the use of new materials in design such as microscale materials and ultra low-density metallic materials. Reliable design of future weapon components and systems demands a thorough understanding of the deformation modes in these materials that comprise the components and a robust methodology to predict their performance during service or storage. Traditional continuum models of material deformation and failure are not easily extended to these new materials unless microstructural characteristics are included in the formulation. For example, in LIGA Ni and Al-Si thin films, the physical size is on the order of microns, a scale approaching key microstructural features. For a new potential structural material, cast Mg offers a high stiffness-to-weight ratio, but the microstructural heterogeneity at various scales requires a structure-property continuum model. Processes occurring at the nanoscale and microscale develop certain structures that drive material behavior. The objective of the work presented in this report was to understand material characteristics in relation to mechanical properties at the nanoscale and microscale in these promising new material systems. Research was conducted primarily at the University of Colorado at Boulder to employ tightly coupled experimentation and simulation to study damage at various material size scales under monotonic and cyclic loading conditions. Experimental characterization of nano/micro damage will be accomplished by novel techniques such as in-situ environmental scanning electron microscopy (ESEM), 1 MeV transmission electron microscopy (TEM), and atomic force microscopy (AFM). New simulations to support experimental efforts will include modified embedded atom method (MEAM) atomistic simulations at the nanoscale and single crystal micromechanical finite element simulations. This report summarizes the major research and development accomplishments for the LDRD project titled 'Atomistic Modeling of Nanowires, Small-scale Fatigue Damage in Cast Magnesium, and Materials for MEMS'. This project supported a strategic partnership between Sandia National Laboratories and the University of Colorado at Boulder by providing funding for the lead author, Ken Gall, and his students, while he was a member of the University of Colorado faculty.

Dunn, Martin L. (University of Colorado, Boulder, CO); Talmage, Mellisa J. (University of Colorado, Boulder, CO); McDowell, David L., 1956- (,-Georgia Institute of Technology, Atlanta, GA); West, Neil (University of Colorado, Boulder, CO); Gullett, Philip Michael (Mississippi State University , MS); Miller, David C. (University of Colorado, Boulder, CO); Spark, Kevin (University of Colorado, Boulder, CO); Diao, Jiankuai (University of Colorado, Boulder, CO); Horstemeyer, Mark F. (Mississippi State University , MS); Zimmerman, Jonathan A.; Gall, K (Georgia Institute of Technology, Atlanta, GA)

2006-10-01T23:59:59.000Z

453

CAST STONE TECHNOLOGY FOR THE TREATMENT AND IMMOBILIZATION OF LOW-ACTIVITY WASTE  

SciTech Connect

Cast stone technology is being evaluated for potential application in the treatment and immobilization of Hanford low-activity waste. The purpose of this document is to provide background information on cast stone technology. The information provided in the report is mainly based on a pre-conceptual design completed in 2003.

MINWALL HJ

2011-04-08T23:59:59.000Z

454

Prediction of the Fatigue Life of Cast Steel Containing Shrinkage Porosity  

E-Print Network (OSTI)

of porosity becomes especially critical. An integrated design process is emerging in which a casting process] It is anticipated that such a design process will also help guide and improve casting inspection procedures INHOMOGENEITIES due to porosity are currently not considered in the design of structural components made from

Beckermann, Christoph

455

Modelling the environmental impact of an aluminium pressure die casting plant and options for control  

Science Journals Connector (OSTI)

This study describes a model (MIKADO) to analyse options to reduce the environmental impact of aluminium die casting. This model will take a company perspective, so that it can be used as a decision-support tool for the environmental management of a ... Keywords: Aluminium die casting plant, Environmental decision-support tool, Environmental impact assessment, Integrated Assessment Model, Modelling

Belmira Neto; Carolien Kroeze; Leen Hordijk; Carlos Costa

2008-02-01T23:59:59.000Z

456

Metrological analysis of a procedure for the automatic 3D modeling of dental plaster casts  

E-Print Network (OSTI)

Metrological analysis of a procedure for the automatic 3D modeling of dental plaster casts Nicola to an automatic procedure recently proposed for the 3D modeling of dental plaster casts. This contribution derives of an automatic 3D modeling procedure recently proposed and it shows the accuracy of 3D modeling dental plaster

Abu-Mostafa, Yaser S.

457

Blanketing effect of expansion foam on liquefied natural gas (LNG) spillage pool  

Science Journals Connector (OSTI)

Abstract With increasing consumption of natural gas, the safety of liquefied natural gas (LNG) utilization has become an issue that requires a comprehensive study on the risk of LNG spillage in facilities with mitigation measures. The immediate hazard associated with an LNG spill is the vapor hazard, i.e., a flammable vapor cloud at the ground level, due to rapid vaporization and dense gas behavior. It was believed that high expansion foam mitigated LNG vapor hazard through warming effect (raising vapor buoyancy), but the boil-off effect increased vaporization rate due to the heat from water drainage of foam. This work reveals the existence of blocking effect (blocking convection and radiation to the pool) to reduce vaporization rate. The blanketing effect on source term (vaporization rate) is a combination of boil-off and blocking effect, which was quantitatively studied through seven tests conducted in a wind tunnel with liquid nitrogen. Since the blocking effect reduces more heat to the pool than the boil-off effect adds, the blanketing effect contributes to the net reduction of heat convection and radiation to the pool by 70%. Water drainage rate of high expansion foam is essential to determine the effectiveness of blanketing effect, since water provides the boil-off effect.

Bin Zhang; Yi Liu; Tomasz Olewski; Luc Vechot; M. Sam Mannan

2014-01-01T23:59:59.000Z

458

Two-dimensional flow of foam around an obstacle: force measurements  

E-Print Network (OSTI)

A Stokes experiment for foams is proposed. It consists in a two-dimensional flow of a foam, confined between a water subphase and a top plate, around a fixed circular obstacle. We present systematic measurements of the drag exerted by the flowing foam on the obstacle, \\emph{versus} various separately controlled parameters: flow rate, bubble volume, bulk viscosity, obstacle size, shape and boundary conditions. We separate the drag into two contributions, an elastic one (yield drag) at vanishing flow rate, and a fluid one (viscous coefficient) increasing with flow rate. We quantify the influence of each control parameter on the drag. The results exhibit in particular a power-law dependence of the drag as a function of the bulk viscosity and the flow rate with two different exponents. Moreover, we show that the drag decreases with bubble size, and increases proportionally to the obstacle size. We quantify the effect of shape through a dimensioned drag coefficient, and we show that the effect of boundary conditions is small.

Benjamin Dollet; Florence Elias; Catherine Quilliet; Christophe Raufaste; Miguel Aubouy; Francois Graner

2004-10-13T23:59:59.000Z

459

Development of high void fraction polylactide composite foams using injection molding: Mechanical and thermal insulation properties  

Science Journals Connector (OSTI)

Abstract Polylactide (PLA) and PLA composites with void fractions as high as 65% were fabricated using low-pressure foam injection molding (FIM) and high-pressure FIM (HPFIM) equipped with mold opening and gas counter pressure. The cellular morphology and crystallinity were characterized using scanning electron microscopy and differential scanning calorimetry, respectively. The mechanical (flexural and impact resistance) and thermal insulation properties were also measured. Unlike, talc, the addition of nanoclay markedly enhanced the ductility of solid PLA samples as well as significantly improved the cell morphology of foamed samples, which resulted in the increased specific modulus, strength and impact resistance. In all the PLA samples made using HPFIM, with an increased void fraction up to 55%, the flexural rigidity increased up to four times, the specific impact resistance increased up to 15%, and the thermal insulation increased up to three times. The results of this investigation revealed that low-density PLA composite foams with improved rigidity, impact strength, and thermal insulation can be developed using HPFIM for various applications such as transportation and construction industries.

A. Ameli; D. Jahani; M. Nofar; P.U. Jung; C.B. Park

2014-01-01T23:59:59.000Z

460

Sound insulation property of Al-Si closed-cell aluminum foam bare board material  

Science Journals Connector (OSTI)

A1-Si closed-cell aluminum foam bare boards of 1?240 mm1?100 mm with different densities and thicknesses were prepared by molten body transitional foaming process. The sound reduction index(R) of AI-Si closed-cell aluminum foam bare boards was investigated experimentally under different frequencies (100-4?000 Hz). It is found that sound reduction index(R) is small under low frequencies, large under high frequencies and is controlled by different mechanisms. The sound insulation property basically conforms with the monolayer board sound insulation theory. The sound reduction index(R) increases with the even growth of thickness and density, but its rising trend is tempered. The single number sound reduction indexes(Rw) of specimen with thickness of 20 cm and density of 0.51 g/cm3 are 30.8 dB and 33 dB respectively, which demonstrates good sound insulation property for lightmass materials.

Hai-jun YU; Guang-chun YAO; Xiao-lin WANG; Bing LI; Yao YIN; Ke LIU

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "foam metal casting" 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

Experimental investigation of battery thermal management system for electric vehicle based on paraffin/copper foam  

Science Journals Connector (OSTI)

Abstract To enhance the heat transfer of phase change material in battery thermal management system for electric vehicle, a battery thermal management system by using paraffin/copper foam was designed and experimentally investigated in this paper. The thermal performances of the system such as temperature reduction and distribution are discussed in detail. The results showed that the local temperature difference in both a single cell and battery module were increased with the increase of discharge current, and obvious fluctuations of local temperature difference can be observed when the electric vehicle is in road operating state. When the battery is discharging at constant current, the maximum temperature and local temperature difference of the battery module with paraffin/copper foam was lower than 45C and 5C, respectively. After the battery thermal management system was assembled in electric vehicle, the maximum temperature and local temperature difference in road operating state was lower than 40C and 3C, respectively. The experimental results demonstrated that paraffin/copper foam coupled battery thermal management presented an excellent cooling performance.

Zhonghao Rao; Yutao Huo; Xinjian Liu; Guoqing Zhang

2014-01-01T23:59:59.000Z

462

Clean Cast Steel Technology: Effect of Micro-porosity on Tensile and Charpy Properties of Four Cast Steels  

SciTech Connect

The effect of these large shrink cavities on mechanical properties could be easily calculated using well established engineering formulas. Over the years, increases in computational and metallurgical resources have allowed the modeler to improve accuracy and increase the complexity of numerical predictors. An accurate prediction of micro-porosity, not observable using conventional radiographic techniques, and an engineering understanding of the effect on mechanical properties would give a designer confidence in using a more efficient casting design and a lower safety factor. This will give castings an additional design advantage. The goal of this project is to provide current and future modelers/designers with a tensile and Charpy property dataset for validation of micro-porosity predictors. The response of ultimate strength, elongation, and reduction in area to micro-porosity was very similar in all four alloys. Ultimate strength was largely unaffected by tensile fracture surface porosity until values of about 25% were reached and decreased linearly with increasing values. Elongation and reduction in area decreased sharply after less than 5% fracture surface porosity. Niyama values of about 0.7 were produced sound material and acceptable tensile properties. Ultrasonic velocities of 0.233 in/usec and higher produced acceptable tensile properties. Metallographic examination revealed a ratio of 4-6 to 1 in fracture surface porosity to metallographic porosity. Charpy impact properties were largely unaffected by the microporosity concentrations examined in this study and did not correlate to either Niyama values, fracture surface porosity, or metallographic porosity.

Griffin, John, A.; Bates, Charles, E.

2005-09-19T23:59:59.000Z

463

The Effect of Equilibrating Mounted Dental Stone Casts in Maximum Intercuspation on the Occlusal Harmony of an Indirect Restoration  

E-Print Network (OSTI)

The purpose of this study was to determine if equilibration of dental stone casts mounted in maximum intercuspation can improve occlusal harmony of a cast gold restoration. A dentoform mounted on an articulator with crown preparation on tooth #19...

Benson, Peter Andrew

2013-12-13T23:59:59.000Z

464

Proposal for the award of a blanket contract for the supply of cast-resin dry-type power transformers  

E-Print Network (OSTI)

Proposal for the award of a blanket contract for the supply of cast-resin dry-type power transformers

2012-01-01T23:59:59.000Z

465

Engineering scale demonstration of a prospective Cast Stone process  

SciTech Connect

This report documents an engineering-scale demonstration with non-radioactive simulants that was performed at SRNL using the Scaled Continuous Processing Facility (SCPF) to fill an 8.5 ft container with simulated Cast Stone grout. The Cast Stone formulation was chosen from the previous screening tests. Legacy salt solution from previous Hanford salt waste testing was adjusted to correspond to the average composition generated from the Hanford Tank Waste Operation Simulator (HTWOS). The dry blend materials, ordinary portland cement (OPC), Class F fly ash, and ground granulated blast furnace slag (GGBFS or BFS), were obtained from Lafarge North America in Pasco, WA. Over three days, the SCPF was used to fill a 1600 gallon container, staged outside the facility, with simulated Cast Stone grout. The container, staged outside the building approximately 60 ft from the SCPF, was instrumented with x-, y-, and z-axis thermocouples to monitor curing temperature. The container was also fitted with two formed core sampling vials. For the operation, the targeted grout production rate was 1.5 gpm. This required a salt solution flow rate of approximately 1 gpm and a premix feed rate of approximately 580 lb/h. During the final day of operation, the dry feed rate was increased to evaluate the ability of the system to handle increased throughput. Although non-steady state operational periods created free surface liquids, no bleed water was observed either before or after operations. The final surface slope at a fill height of 39.5 inches was 1-1.5 inches across the 8.5 foot diameter container, highest at the final fill point and lowest diametrically opposed to the fill point. During processing, grout was collected in cylindrical containers from both the mixer discharge and the discharge into the container. These samples were stored in a humid environment either in a closed box proximal to the container or inside the laboratory. Additional samples collected at these sampling points were analyzed for rheological properties and density. Both the rheological properties (plastic viscosity and yield strength) and density were consistent with previous and later SCPF runs.

Cozzi, A.; Fowley, M.; Hansen, E.; Fox, K.; Miller, D.; Williams, M.

2014-09-30T23:59:59.000Z

466

Composite metal membrane  

DOE Patents (OSTI)

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, Nathaniel M. (Espanola, NM); Dye, Robert C. (Los Alamos, NM); Snow, Ronny C. (Los Alamos, NM); Birdsell, Stephan A. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

467

Composite metal membrane  

DOE Patents (OSTI)

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, N.M.; Dye, R.C.; Snow, R.C.; Birdsell, S.A.

1998-04-14T23:59:59.000Z

468

First results from the CERN Axion Solar Telescope (CAST)  

E-Print Network (OSTI)

Hypothetical axion-like particles with a two-photon interaction would be produced in the Sun by the Primakoff process. In a laboratory magnetic field (``axion helioscope'') they would be transformed into X-rays with energies of a few keV. Using a decommissioned LHC test magnet, CAST has been running for about 6 months during 2003. The first results from the analysis of these data are presented here. No signal above background was observed, implying an upper limit to the axion-photon coupling < 1.16 10^{-10} GeV^-1 at 95% CL for m_a <~0.02 eV. This limit is comparable to the limit from stellar energy-loss arguments and considerably more restrictive than any previous experiment in this axion mass range.

CAST Collaboration

2005-03-01T23:59:59.000Z

469

Polymer quenched prealloyed metal powder  

DOE Patents (OSTI)

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

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

2001-01-01T23:59:59.000Z

470

Usefulness of gel-casting method in the fabrication of nonstoichiometric CaZrO{sub 3}-based electrolytes for high temperature application  

SciTech Connect

Hydrogels obtained from lower toxicity monomers of N-(hydroxymethyl)acrylamide and N,N'-methylenebisacrylamide were applied to form nonstoichiometric CaZrO{sub 3}-based electrolytes. A coprecipitation-calcination method with ((NH{sub 4}){sub 2}C{sub 2}O{sub 4}) in concentrated NH{sub 3} aqueous solution was used to synthesise CaZrO{sub 3} involving 51 mol.% CaO (CZ-51) powder. The gas-tight CaZrO{sub 3}-based rods were prepared by the gel-casting method with 45 vol.% suspension and then sintered at 1500 deg. C-2 h. It was found that in low oxygen partial pressure, the nonstoichiometric CaZrO{sub 3} obtained by gel-casting method were pure oxide ion conductors. These samples exhibited comparable electrical conductivity values to isostatically compressed pellets starting from the same powder. The results of experiments on thermochemical stability of CZ-51 gel-cast shapes at high temperatures in air or gas mixtures involving 2-50 vol.% H{sub 2}, as well as the corrosion resistance in exhaust gases from a self-ignition engine were also presented and discussed. The thermal resistance of CaZrO{sub 3} obtained rods against molten nickel or iron was also examined. Based upon these investigations, it is evident that only in hydrogen-rich gas atmospheres can the stability of CaZrO{sub 3} shapes be limited due to the presence of CaO precipitation as a second phase. The nonstoichiometric CaZrO{sub 3} (CZ-51) gel-cast materials were also tested in solid galvanic cells, designed to study thermodynamic properties of oxide materials, important for SOFC and energy technology devices. In this way, the Gibbs energy of NiM{sub 2}O{sub 4}, M = Cr, Fe, at 650-1000 deg. C was determined. The CaZrO{sub 3} involving 51 mol.% CaO gel-cast sintered shapes seems to be promising solid electrolytes for electrochemical oxygen probes in control of metal processing and thermodynamic studies of materials important for the development of the energy industry.

Dudek, Magdalena [AGH - University of Science and Technology, Faculty of Energy and Fuels, 30-059 Cracow (Poland)

2009-09-15T23:59:59.000Z

471

The increase in use of isostatic processing for aluminum alloy castings  

SciTech Connect

The castings industry originally perceived isostatic processing as a means of reducing scrap rates. Prior to the development of HIP`ing no other non-destructive technique was available which let to improved economics. However in recent years the emphasis has changed towards the exploitation of improved properties as design engineers realize that cast parts which have been HIP`d can develop capabilities similar to those of forged components. This paper presents experimental data regarding compaction during HIP and CIP processes, applied to various aluminum castings alloys which are used extensively in the Romanian automotive industry.

Geaman, V. [Univ. Transylvania of Brasov (Romania)

1996-12-31T23:59:59.000Z

472

Understanding how processing additives tune nanoscale morphology of high efficiency organic photovoltaic blends: From casting solution to spun-cast thin film  

SciTech Connect

Adding a small amount of a processing additive to the casting solution of organic blends has been demonstrated to be an effective method for achieving improved power conversion efficiency (PCE) in organic photovoltaics (OPVs). However, an understanding of the nano-structural evolution occurring in the transformation from casting solution to thin photoactive films is still lacking. In this report, we investigate the effects of the processing additive diiodooctane (DIO) on the morphology of OPV blend of PBDTTT-C-T and fullerene derivative, PC71BM in a casting solution and in spun-cast thin films by using neutron/x-ray scattering, neutron reflectometry and other characterization techniques. The results reveal that DIO has no effect on the solution structures of PBDTTT-C-T and PC71BM. In the spun-cast films, however, DIO is found to promote significantly the molecular ordering of PBDTTT-C-T and PC71BM, and phase segregation, resulting in the improved PCE. Thermodynamic analysis based on Flory-Huggins theory provides a rationale for the effects of DIO on different characteristics of phase segregation as a solvent and due to evaporationg during the film formation. Such information may enable improved rational design of ternary blends to more consistently achieve improved PCE for OPVs.

Shao, Ming [ORNL; Keum, Jong Kahk [ORNL; Kumar, Rajeev [ORNL; Chen, Jihua [ORNL; Browning, Jim [ORNL; Chen, Wei [Argonne National Laboratory (ANL); Jianhui, Hou [Chinese Academy of Sciences (CAS), Institute of Chemistry; Do, Changwoo [ORNL; Littrell, Ken [ORNL; Sanjib, Das [University of Tennessee, Knoxville (UTK); Rondinone, Adam Justin [ORNL; Geohegan, David B [ORNL; Sumpter, Bobby G [ORNL; Xiao, Kai [ORNL

2014-01-01T23:59:59.000Z

473

Applied Composite Materials, 2005. 12(3-4): p. 247-261 247 Enhancement of Energy Absorption in Syntactic Foams by Nanoclay Incorporation for Sandwich  

E-Print Network (OSTI)

in Syntactic Foams by Nanoclay Incorporation for Sandwich Core Applications Nikhil Gupta1 and Rahul Maharsia2 foams due to the incorporation of nano-sized clay (nanoclay) particles. A surface modified clay, Nanomer.02 and 0.05 volume fraction of nanoclay, respectively. The combined volume fraction of microballoons

Gupta, Nikhil

474

MACHINING ELIMINATION THROUGH APPLICATION OF THREAD FORMING FASTENERS IN NET SHAPED CAST HOLES  

SciTech Connect

The ultimate objective of this work was to eliminate approximately 30% of the machining performed in typical automotive engine and transmission plants by using thread forming fasteners in as-cast holes of aluminum and magnesium cast components. The primary issues at the source of engineers???????????????¢???????????????????????????????? reluctance to implementing thread forming fasteners in lightweight castings are: * Little proof of consistency of clamp load vs. input torque in either aluminum or magnesium castings. * No known data to understand the effect on consistency of clamp load as casting dies wear. The clamp load consistency concern is founded in the fact that a portion of the input torque used to create clamp load is also used to create threads. The torque used for thread forming may not be consistent due to variations in casting material, hole size and shape due to tooling wear and process variation (thermal and mechanical). There is little data available to understand the magnitude of this concern or to form the basis of potential solutions if the range of clamp load variation is very high (> +/- 30%). The range of variation that can be expected in as-cast hole size and shape over the full life cycle of a high pressure die casting die was established in previous work completed by Pacific Northwest National Laboratory, (PNNL). This established range of variation was captured in a set of 12 cast bosses by designing core pins at the size and draft angles identified in the sited previous work. The cast bosses were cut into ???????????????¢????????????????????????????????nuts???????????????¢??????????????????????????????? that could be used in the Ford Fastener Laboratory test-cell to measure clamp load when a thread forming fastener was driven into a cast nut. There were two sets of experiments run. First, a series of cast aluminum nuts were made reflecting the range of shape and size variations to be expected over the life cycle of a die casting die. Taptite thread forming fasteners, (a widely used thread forming fastener suitable for aluminum applications), were driven into the various cored, as-cast nuts at a constant input torque and resulting clamp loads were recorded continuously. The clamp load data was used to determine the range of clamp loads to be expected. The bolts were driven to failure. The clamp load corresponding to the target input of 18.5 Nm was recorded for each fastener. In a like fashion, a second set of experiments were run with cast magnesium nuts and ALtracs thread forming fasteners, (a widely used thread forming fastener suitable for magnesium applications). Again all clamp loads were recorded and analyzed similarly to the Taptites in aluminum cast nuts. Results from previous work performed on the same test cell for a Battelle project using standard M8 bolts into standard M8 nuts were included as a comparator for a standard bolt and nut application. The results for the thread forming fasteners in aluminum cast holes were well within industry expectations of +/- 30% for out of the box and robustness range te

Cleaver, Ryan J.; Cleaver, Todd H.; Talbott, Richard

2012-05-02T23:59:59.000Z

475

Wind Pressure Resistance of Walls with Exterior Rigid Foam: Structural Performance Testing and Development of Design Specifications  

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

Wind Pressure Resistance of Wind Pressure Resistance of Walls with Exterior Rigid Foam: Structural Performance Testing and Development of Design Specifications Building America Stakeholder Meeting February 2012 2 Gaps and Barriers  Wind pressure resistance of multi- layered walls with exterior rigid foam * Performance characteristics * Capacity * Limitations * Design method * Design specification 3 Market Implications  Walls with exterior rigid foam  2012 IECC - Climate Zones 3 and higher  Wall systems:  Claddings and their attachments  Interior finishes  Air sealing, air barriers  Cavity insulation 4 Research Tasks  Laboratory Testing of Wall Assemblies under dynamic wind pressures at the NAHB Research Center  NAHB/DOE/ACC  Laboratory Testing of a One-story House in IBHS Wind Tunnel Facility

476

Thermographic analysis of polyurethane foams integrated with phase change materials designed for dynamic thermal insulation in refrigerated transport  

Science Journals Connector (OSTI)

Abstract The dispersion process of a micro-encapsulated phase change material (n-tetradecane) into a polyurethane foam was studied in order to develop a micro-composite insulating material with both low thermal conductivity and latent heat storage properties. The maximum weight content of micro-capsules added to the cellular matrix was 13.5%. Dynamic thermal properties of hybrid foams were investigated by means of a thermographic analysis. This was found to be a very effective diagnostic technique in detecting the change in heat transfer rate across the micro-composite foam in an indirect way, i.e. by measuring how the surface temperature changes over time under heat irradiation. Such a material would be of interest in the field of transport of perishable goods, particularly those requiring a controlled regime of carriage/storage temperatures.

Andrea Tinti; Antonella Tarzia; Alessandra Passaro; Riccardo Angiuli

2014-01-01T23:59:59.000Z

477

Failure analysis of reinforced polyurethane foam-based LNG insulation structure using damage-coupled finite element analysis  

Science Journals Connector (OSTI)

Abstract The primary aim of this study was to develop a unified anisotropic elasto-viscoplastic-damage model that describes the material nonlinear behavior and damage/crack growth of a reinforced polyurethane foam-based liquefied natural gas carrier insulation system. A BodnerPartom unified elasto-viscoplastic model independent of the yield surface and loading history was expanded to an anisotropic unified model. To predict the damage growth and the crack initiation/growth of reinforced polyurethane foam, a BodnerChan damage model was applied to the proposed unified elasto-viscoplastic-damage model. The developed mechanical model was implicitly formulated and implemented into an ABAQUS user-defined material subroutine. To validate the proposed numerical method, the simulation results were compared with the results of a series of static uniaxial tests and dynamic cyclic tests conducted on the reinforced polyurethane foam and the liquefied natural gas carrier insulation system, respectively.

Chi-Seung Lee; Jae-Myung Lee

2014-01-01T23:59:59.000Z

478

SPRAY FOAM IN ACCESSIBLE SPACES:BEST PRACTICES AND CASE STUDIES FOR RETROFIT IN MIXED-HUMID CLIMATE  

SciTech Connect

Heating and cooling the house is one of the homeowners major expenses. Reducing these costs, saving energy, and creating a healthier, more comfortable indoor environment are good reasons to consider improving the building thermal envelope. Improvements usually consider increasing the amount of insulation, reducing the infiltration of outside air, and controlling moisture in existing buildings. This report describes the use of spray foam materials to insulate, seal, and control moisture. This discussion is limited to treating areas that are accessible. What is accessible, however, can vary depending on the type of renovation. If the building has been gutted or exterior surfaces removed, there are more options. This report will look at areas to consider for spray foam application and discuss the types of spray foams available and their uses. A number of case studies are presented to show the effectiveness of this retrofit in existing houses based on performance data.

Christian, Jeffrey E [ORNL] [ORNL; Gant, Kathy [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL)

2013-12-01T23:59:59.000Z

479

Net climatic impact of solid foam insulation produced with halocarbon and non-halocarbon blowing agents  

Science Journals Connector (OSTI)

The net climatic effect of increasing the amount of insulation in buildings through the use of halocarbon-blown foam insulation involves three factors: the greenhouse gas emissions associated with the energy used to make the insulation; the climatic impact of leakage of the halocarbon blowing agent from the insulation during its manufacture, use, and at the time of disposal; and the reduction in heating and/or cooling energy use and associated greenhouse gas emissions. Recent studies and assessments leave the impression that the use of halocarbon-blown foam insulation has a strong net positive impact on climate, with the reduction in heating-related emissions being 20100 times greater than the CO2-equivalent halocarbon emissions. This result applies only to the overall impact of rather modest levels of insulation applied to a pre-existing roof or wall with negligible thermal resistance. It is appropriate to consider the time required for heating-related emission savings to offset halocarbon and manufacturing emissions for the addition of successive increments of insulationthe marginal payback time. For typical blowing agent leakage rates and for insulation levels found in high-performance houses, marginal payback times can be in excess of 100 years using halocarbon blowing agents, but are only 1050 years using non-halocarbon blowing agents. With a fixed thickness of insulation, the difference in heating energy savings using insulation with different blowing agents is generally only a few per cent, in spite of differences in thermal conductivity of up to 66%. The net savings in CO2-equivalent emissions is larger using non-halocarbon blowing agents, with the relative benefit of using non-halocarbon blowing agents greater the greater the thermal resistance of the envelope element prior to adding foam insulation.

L.D. Danny Harvey

2007-01-01T23:59:59.000Z

480

Method for removing metal ions from solution with titanate sorbents  

DOE Patents (OSTI)

A method for removing metal ions from solution comprises the steps of providing titanate particles by spray-drying a solution or slurry comprising sorbent titanates having a particle size up to 20 micrometers, optionally in the presence of polymer free of cellulose functionality as binder, said sorbent being active towards heavy metals from Periodic Table (CAS version) Groups IA, IIA, IB, IIB, IIIB, and VIII, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size distribution in the range of 1 to 500 micrometers. The particles can be used free flowing in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove metal ions from aqueous or organic liquid.

Lundquist, Susan H. (White Bear Township, MN); White, Lloyd R. (Minneapolis, MN)

1999-01-01T23:59:59.000Z

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