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in subjects: "Extrusion"

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Advanced photovoltaic concentrator system low-cost prototype module

This report describes the continued development of an extruded lens and the development of a PV receiver, both of which will be used in the Solar Engineering Applications Corporation (SEA) 10X concentrator. These efforts were pare of a pre-Concentrator Initiative Program. The 10X concentrator consists of an inexpensive, extruded linear Fresnel lens which focuses on one-sun cells which are adhesive-bonded to an anodized aluminum heat sink. Module sides are planned to be molded along with the len… more

Date: September 1, 1991

Creator: Kaminar, N.R.; McEntee, J. & Curchod, D. (Solar Engineering Applications Corp., San Jose, CA (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Enhanced durability and reactivity for zinc ferrite desulfurization sorbent

AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-… more

Date: August 28, 1987

Creator: Jha, Mahesh C.; Baltich, Linda K. & Berggren, Mark H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Potential for energy conservaton in the metal forming industries. Progress report, July 1, 1978-August 15, 1979

Reduced energy consumption and improved product attributes are realizable benefits that are achievable through the adoption of optimal metal forming techniques. With the meteoric rise in energy costs, certain segments of the metal forming industries have accelerated their efforts in switching from energy intensive manufacturing techniques, e.g., casting, to metal forming, and, furthermore, from hot forming and machined components to cold forming, notably the automotive industry. The first year … more

Date: August 1, 1979

Creator: Avitzur, B.; Beidleman, C. R. & Smackey, B. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Production of aluminum-silicon alloy and ferrosilicon and commercial purity aluminum by the direct reduction process. Fourth interim technical report, Phase B, June 1-August 31, 1979

A series of calculated energy balances were made on alternate thermal processes for Al and Al-Si production. The computer modeling program was checked for validity by modeling low shaft Si production and comparing to known commercial conditions. Burden materials ground to -65 mesh prior to agglomeration compared favorably to -200 mesh grinds. Ball forming agglomeration was developed for bauxite-clay-coke mixes. The balls produced had higher strength and abrasion resistance than extrusions made … more

Date: September 1, 1979

Creator: Bruno, M. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

End-crop box counter

A nondestructive assay instrument that measures large quantities of low-enriched uranium metal is described. The assay is based on the spontaneous totals neutron signal.

Date: January 1, 1983

Creator: Sprinkle, J. K. Jr.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Ceramic and cermet targets

Use of isotopic materials as targets in high temperature environments, e.g., reactor cores, require that chemically stable forms of the isotopes be employed. Usually oxides are compatible with temperatures > 1600/sup 0/K, although some light element oxides exhibit some volatility at temperatures > 1300/sup 0/K. Especially in the case of heavy elements, the relatively low melting points of the metals, poor compatibility of the metals with encapsulation materials, and high chemical reactivity at … more

Date: January 1, 1979

Creator: Kobisk, E. H.; Quinby, T. C. & Aaron, W. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Steady-State Thermomechanical Finite Element Analysis of Elastoviscoplastic Metal Forming Processes

Extrusion and rolling processes exhibiting large amounts of plastic flow are analyzed using a finite element technique that is based on a modified creeping viscous flow approximation. The technique, called the initial stress-rate method, iteratively corrects creeping viscous flow solutions to generate results that include elastic response. The momentum equations have been coupled with the energy equation to provide the capability to predict thermomechanical response during forming operations.

Date: January 1, 1977

Creator: Dawson, P.R. & Thompson, E.G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Repetitive MEGAMP per microsecond di/dt pulsers for driving sub-ohm transmission line neutrino particle detectors

With the advent of low-cost honeycomb extrusions of polypropylene sheets, transmission line flash chambers have become highly attractive candidates for large particle detector arrays. This has brought about the need for repetitive pulse systems that must provide exceptionally high peak currents, low levels of spurious radiation, high reliability, and shot life in excess of 10/sup 7/. Each module of 10 flash chambers requires a peak current of 20 kA with a current di/dt greater than 1 MA/..mu..s… more

Date: January 1, 1980

Creator: Krausse, G.J.; Dalton, C.G. & Sarjeant, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Coaxial extrusion conversion concept for polymeric flat plate solar collectors. Final technical report, September 30, 1978-December 31, 1979

This study investigated materials and processes for fundamental improvements in flat-plate solar collector cost and performance. The goal was to develop a process for direct conversion of inexpensive raw materials into a completed solar collector unit, without labor intensive assembly operations. It was thought that materials carefully matched to the process and end-use environment would substantially reduce collector costs, as compared to conventional industry practice. The project studied the… more

Date: January 1, 1980

Creator: Rhodes, R. O.; Chapman, N. J.; Chao, K. C. & Sorenson, K. F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Improved Tubulars for Better Economics in Deep Gas Well Drilling using Microwave Technology

The main objective of the entire research program has been to improve the rate-of-penetration in deep hostile environments by improving the life cycle and performance of coiled-tubing, an important component of a deep well drilling system for oil and gas exploration, by utilizing the latest developments in the microwave materials technology. Based on the results of the Phase I and insurmountable difficulties faced in the extrusion and de-waxing processes, the approach of achieving the goals of … more

Date: July 31, 2007

Creator: Agrawal, Dinesh; Gigl, Paul; Hunt, Mark & Dennis, Mahlon

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Characterization of modified 9 Cr-1 Mo steel extruded pipe

The fabrication of hot-extruded pipe of modified 9 Cr-1 Mo steel at Cameron Iron Works is described. The report also deals with the tempering response; tensile, Charpy impact, and creep properties; and microstructure of the hot-extruded pipe. The tensile properties of the pipe are compared with the average and average -1.65 standard error of estimate curves for various product forms of several commercial heats of this alloy. The creep-rupture properties are compared with the average curve for v… more

Date: April 1, 1985

Creator: Sikka, V.K. & Hart, M.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Consumable arc-melting, extruding, and rolling process for iridium sheet

An iridium alloy has been used as cladding for the /sup 238/PuO/sub 2/ fuel in radioisotope thermoelectric generators (RTGs) for recent interplanetary spacecraft such as Voyagers 1 and 2 and will be used for the Galileo and Ulysses spacecraft. The iridium alloy sheet for the fuel cladding used on these missions was fabricated by hot and cold rolling of arc-melted and drop-cast 0.5-kg ingots. Upon completion of production for these spacecraft, an opportunity was taken to conduct process improvem… more

Date: June 1, 1986

Creator: Heestand, R. L.; Copeland, G. L. & Martin, M. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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High-temperature fuel technology for nuclear process heat: ZrC-containing coated particle fuels and high-density graphite fuel matrices

This is the final report on the high-temperature, gas-cooled reactor fuels project that was pursued at the Los Alamos Scientific Laboratory from early 1973 to mid-1977. This work followed two broad paths: (1) ZrC was utilized in various ways to improve the temperature capability of fission-product-retaining coated nuclear fuel particles and (2) techniques were developed for fabricating fuel rods by extruding the coated particles in high-density graphite matrices. The key to the ZrC coating proj… more

Date: December 1, 1977

Creator: Wagner, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Extrusion strains produced in cast and in powder aluminum billets

A full-field solution for strains produced during axisymmetric extrusion may be obtained through a study of laminar flowlines which are produced as the material flows through the die. A flow function is mathematically constructed, using the flowlines, to determine the material flow rate along the given path. Velocities and strain-rates are determined along the flowlines. Flowline curves are determined experimentally from the stamped rectangular grid which was originally placed on an axial plane… more

Date: January 1, 1986

Creator: Peacock, H B & Berghaus, D G

Item Type: Article

Partner: UNT Libraries Government Documents Department

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RDX/Sylgard Extrudable Explosive Development

Formulation procedures for X-0208, an 80 percent RDX/20 percent Sylgard extrudable, have been developed. The extrudable explosive, made from a mixture of micronized RDX and Class E RDX, will sustain detonation in a 1.65 mm channel and can be mechanically extruded into ribbon-type configurations.

Date: October 1, 1977

Creator: Osborn, A. Gordon; Schmitz, George T.; Stallings, Thomas L.; West, George T. & Ashcraft, Robert W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Manufacture of superconducting wire. Progress report, February 1-October 15, 1979

This report is divided into three major sections. The first section covers aspects of the manufacturing technology with existing and potential processes, and the second deals with the analysis of flow and fracture and the derivation of criteria to prevent failure. In the first section, typical present day procedure to assemble a billet, extrude and draw it, with intermediate and final anneals, is described. Then an hypothetical production line with potential alternative processes along the enti… more

Date: October 1, 1979

Creator: Avitzur, B.; Chou, Y. T.; Talbert, S. & Wu, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Coal log pipeline research at the University of Missouri

Project tasks: Perform the necessary testing and development to demonstrate that the amount of binder in coal logs can be reduced to 8% or lower to produce logs with adequate strength to eliminate breakage during pipeline transportation, under conditions experienced in long distance pipeline systems. Prior to conducting any testing and demonstration, grantee shall perform an information search and make full determination of all previous attempts to extrude or briquette coal, upon which the test… more

Date: March 1, 1992

Creator: Liu, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Final Scientific Report

NanoDynamics Inc. has undertaken a study to develop and demonstrate an anode-supported solid oxide fuel cell capable of generating a minimum of 20 W per cell on hydrogen. The cell technology will also be assed for operation on renewable hydrocarbon-based fuels such as biomass gas, as well its applicability for larger-scale power production. The project was divided into five sub-tasks, the first of which was the development and refinement of the cell manufacturing processes of gel-casting and pa… more

Date: January 14, 2008

Creator: Finnerty, Caine

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Nerva Fuel Element Development Program Summary Report - July 1966 through June 1972 Extrusion Studies

This part of the completion report pertaining to the NERVA graphite fuel element program covers data collected during the extrusion studies. The physical properties of the fuel element reached the following values: coefficient of thermal expansion (CTE) - 7.0 x 10-6/o C (25 - l,OOOo C); modulus of elasticity - 1.5 x lo6 psi; flexural strength - - 8,000 psi; ultimate strain to failure - 5,500 pidin; good thermal stress resistance. Matrices were produced which could be vapor coated with crack-fre… more

Date: September 21, 1973

Creator: Napier, J. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A Method to Increase Current Density in a Mono Element Internal Tin Processed Superconductor Utilizing Zr Oxide to Refine Grain Size

The effect of Oxygen on (Nb1Zr)3Sn multifilament conductors manufactured by the Mono Element Internal Tin (MEIT) process was explored to improve the current density by refining the grain size. This followed work first done by General Electric on the Nb3Sn tape process. Techniques to fabricate the more difficult Nb1Zr composites are described and allowed fabrication of long lengths of .254 mm diameter wire from an 88.9 mm diameter billet. Oxygen was incorporated through the use of SnO2 mixed wit… more

Date: April 7, 2008

Creator: Bruce A. Zeitlin, Eric Gregory

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Properties of multifilamentary Nb/sub 3/Sn superconductors fabricated by the internal bronze approach

Results are described of experiments designed to optimize the critical current and to eliminate some manufacturing problems associated with the internal bronze approach. In addition, conductors of large cross sections (7.6 mm x 7.6 mm) were prepared so that the internal bronze approach could be compared with the external bronze as a method for producing superconductors for mirror fusion applications.

Date: January 1, 1979

Creator: Scanlan, R. M.; Cornish, D. N.; Zbasnik, J. P.; Hoard, R. W.; Wong, J. & Randall, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The effect of processing parameters during heat treatment of bulk high- Tc superconductors

Plastic extrusion is a promising method for producing the long lengths of high-{Tc} superconductor that will be necessary to meet many potential applications. A crucial phase of the extrusion method is removal of organic constituents. Incomplete removal can leave residual carbon at grain boundaries, which can adversely affect the superconducting properties, whereas excessively rapid removal of the organics can cause the extruded superconductor to disintegrate completely. In this paper, we analy… more

Date: April 1, 1991

Creator: Cha, Y. S.; Dorris, S. E.; Hull, J. R. & Poeppel, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Investigation of the effects of particle size on the mechanical properties of porous and tin infiltrated niobium rods fabricated by a thermoplastic-powder metallurgy technique

An investigation was made of the influence of particle size on the properties of both porous and tin infiltrated niobium rods fabricated by a thermoplastic-powder metallurgy technique. The residual porosity, extrusion pressure, tensile strength, and ductility were found to be dependent on the particle size distribution. All of these parameters were found to increase with increasing particle size. The influence of sintering time at a temperature of 2250/sup 0/C was also studied. With increasing … more

Date: December 1, 1978

Creator: Noman, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Solidification of commercial and defense low-level radioactive waste in polyethylene

A process was developed for the solidification of salt wastes, incinerator ash and ion-exchange resins in polyethylene. Of the salt wastes, sodium sulfate and boric acid are representative of the wastes produced at commercial nuclear facilities while sodium nitrate in a typical high-volume waste generated at defense-related facilities. Ease of processibility and high loading efficiencies were obtained through the use of low-density polyethylene with melt indices ranging from 2.0 to 55.0 g/minut… more

Date: August 1, 1987

Creator: Franz, E.M.; Heiser, L.H. & Colombo, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department