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Ductile nickel-silicon alloy (open access)

Ductile nickel-silicon alloy

An improvement over prior compositions wherein the ductility of Ni-Si alloys are improved with minor alloying additions of hafnium or zirconium.
Date: August 6, 1990
Creator: Oliver, W. C.
System: The UNT Digital Library
Passive decay heat removal system for water-cooled nuclear reactors (open access)

Passive decay heat removal system for water-cooled nuclear reactors

This document describes passive decay-heat removal system for a water-cooled nuclear reactor which employs a closed heat transfer loop having heat-exchanging coils inside an open-topped, insulated evaporator located inside the reactor vessel, below its normal water level, in communication with a condenser located outside of containment and exposed to the atmosphere. The heat transfer loop is located such that the evaporator is in a position where, when the water level drops in the reactor, it will become exposed to steam. Vapor produced in the evaporator passes upward to the condenser above the normal water level. In operation, condensation in the condenser removes heat from the system, and the condensed liquid is returned to the evaporator. The system is disposed such that during normal reactor operations where the water level is at its usual position, very little heat will be removed from the system, but during emergency, low water level conditions, substantial amounts of decay heat will be removed.
Date: January 1, 1990
Creator: Forseberg, C.W.
System: The UNT Digital Library
Extrusion of metal oxide superconducting wire, tube or ribbon (open access)

Extrusion of metal oxide superconducting wire, tube or ribbon

A process and apparatus for extruding a superconducting metal oxide composition YBa{sub 2}Cu{sub 3}O{sub 7-x} provides a wire (tube or ribbon) having a cohesive mass and a degree of flexibility together with enhanced electrical properties. Wire diameters in the range of 6--85 mils have been produced with smaller wires on the order of 10 mils in diameter exhibiting enhanced flexibility for forming braided, or multistrand, configurations for greater current carrying capacity. The composition for extrusion contains a polymeric binder to provide a cohesive mass to bind the particles together during the extrusion process with the binder subsequently removed at lower temperatures during sintering. The composition for extrusion further includes a deflocculent, an organic plasticizer and a solvent which also are subsequently removed during sintering. Electrically conductive tubing with an inner diameter of 52 mil and an outer diameter of 87--335 mil has also been produced. Flat ribbons have been produced in the range of 10--125 mil thick by 100--500 mil wide. The superconducting wire, tube or ribbon may include an outer ceramic insulating sheath co-extruded with the wire, tubing or ribbon.
Date: January 1, 1990
Creator: Dusek, J.T.
System: The UNT Digital Library
Improved thermal storage module for solar dynamic receivers (open access)

Improved thermal storage module for solar dynamic receivers

This invention relates to a thermal storage apparatus and more particularly to an apparatus for use in conjunction with solar dynamic energy storage systems. The invention is comprised of a thermal energy storage system comprising a germanium phase change material and a graphite container.
Date: January 1, 1990
Creator: Beatty, R. L. & Lauf, R. J.
System: The UNT Digital Library
Method of electrode fabrication and an electrode for metal chloride battery (open access)

Method of electrode fabrication and an electrode for metal chloride battery

A method of fabricating an electrode for use in a metal chloride battery and an electrode are provided. The electrode has relatively larger and more uniform pores than those found in typical electrodes. The fabrication method includes the steps of mixing sodium chloride particles selected from a predetermined size range with metal particles selected from a predetermined size range, and then rigidifying the mixture. The electrode exhibits lower resistivity values of approximately 0.5 {Omega}cm{sup 2} than those resistivity values of approximately 1.0--1.5 {Omega}cm{sup 2} exhibited by currently available electrodes.
Date: October 9, 1990
Creator: Bloom, I.D.; Nelson, P.A. & Vissers, D.R.
System: The UNT Digital Library
Binder Enhanced Refuse Derived Fuel (open access)

Binder Enhanced Refuse Derived Fuel

Patent relating to refuse derived fuels and more particularly to binder enhanced refuse derived fuel pellets and utilization of such pellets in solid-fuel fired furnaces.
Date: April 12, 1995
Creator: Daugherty, Kenneth E.; Venables, Barney J. & Ohlsson, Oscar O.
System: The UNT Digital Library
Method of making multilayered titanium ceramic composites (open access)

Method of making multilayered titanium ceramic composites

A method making a titanium ceramic composite involves forming a hot pressed powder body having a microstructure comprising at least one titanium metal or alloy layer and at least one ceramic particulate reinforced titanium metal or alloy layer and hot forging the hot pressed body follwed by hot rolling to substantially reduce a thickness dimension and substantially increase a lateral dimension thereof to form a composite plate or sheet that retains in the microstructure at least one titanium based layer and at least one ceramic reinforced titanium based layer in the thickness direction of the composite plate or sheet.
Date: August 25, 1998
Creator: Fisher, George T., II; Hansen; Jeffrey, S.; Oden; Laurance, L.; Turner et al.
System: The UNT Digital Library
Counterrotating brushless dc permanent magnet motor (open access)

Counterrotating brushless dc permanent magnet motor

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.
Date: January 1, 1990
Creator: Hawsey, R. A. & Bailey, J. M.
System: The UNT Digital Library
A Stripline Fast Faraday Cup for measuring GHz structure of ion beams (open access)

A Stripline Fast Faraday Cup for measuring GHz structure of ion beams

The Stripline Fast Faraday Cup is a device which is used to quantitatively and qualitatively measure gigahertz time structure characteristics of ion beams with energies up to at least 30 Mev per nucleon. A stripline geometry is employed in conjunction with an electrostatic screen and a Faraday cup to provide for analysis of the structural characteristics of an ion beam. The stripline geometry allows for a large reduction in the size of the instrument while the electrostatic screen permits measurements of the properties associated with low speed ion beams.
Date: January 1, 1990
Creator: Bogaty, J. M.
System: The UNT Digital Library
A method and apparatus for continuous electrophoresis (open access)

A method and apparatus for continuous electrophoresis

A method and apparatus for conducting continuous separation of substances by electrophoresis are disclosed. The process involves electrophoretic separation combined with couette flow in a thin volume defined by opposing surfaces. By alternating the polarity of the applied potential and producing reciprocating short rotations of at least on of the surfaces relative to the other, small increments of separation accumulate to cause substantial, useful segregation of electrophoretically separable components in a continuous flow system.
Date: January 1, 1990
Creator: Watson, J. S.
System: The UNT Digital Library
Triaxial thermopile array geo-heat-flow sensor (open access)

Triaxial thermopile array geo-heat-flow sensor

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.
Date: January 1, 1990
Creator: Carrigan, Charles R.; Hardee, Harold C.; Reynolds, Gerald D. & Steinfort, Terry D.
System: The UNT Digital Library
Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents (open access)

Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents

An acyclonucleoside of nitroimidazole having the ability to specifically bind to tumor cells and useful for therapy, chemotherapy, imaging and radiosensitizing the tumor cells.
Date: January 1, 1990
Creator: Srivastava, P.C. & Hasan, A.
System: The UNT Digital Library
Wedge assembly for electrical transformer component spacing (open access)

Wedge assembly for electrical transformer component spacing

This invention is comprised of a wedge assembly that is easily inserted between two surface to be supported thereby, and thereafter expanded to produce a selected spacing between those surfaces. This wedge assembly has two outer members that are substantially identical except that they are mirror images of each other. Oppositely directed faces of these of these outer members are substantially parallel for the purpose of contacting the surfaces to be separated. The other faces of these outer members that are directed toward each other are tapered so as to contact a center member having complementary tapers on both faces. A washer member is provided to contact a common end of the outer members, and a bolt member penetrates this washer and is threadably received in a receptor of the center member. As the bolt member is threaded into the center member, the center member is drawn further into the gap between the outer members and thereby separates these outer members to contact the surfaces to be separated. In the preferred embodiment, the contacting surfaces of the outer member and the center member are provided with guide elements. The wedge assembly is described for use in separating the secondary windings …
Date: January 1, 1990
Creator: Baggett, F.E. & Cage, W.F.
System: The UNT Digital Library
All ceramic structure for molten carbonate fuel cell (open access)

All ceramic structure for molten carbonate fuel cell

An all-ceramic molten carbonate fuel cell having a composition formed of a multivalent metal oxide or oxygenate such as an alkali metal, transition metal oxygenate. The structure includes an anode and cathode separated by an electronically conductive interconnect. The electrodes and interconnect are compositions ceramic materials. Various combinations of ceramic compositions for the anode, cathode and interconnect are disclosed. The fuel cell exhibits stability in the fuel gas and oxidizing environments. It presents reduced sealing and expansion problems in fabrication and has improved long-term corrosion resistance.
Date: January 1, 1991
Creator: Smith, James L. & Kucera, Eugenia H.
System: The UNT Digital Library
Microwave sintering of nanophase ceramics without concomitant grain growth (open access)

Microwave sintering of nanophase ceramics without concomitant grain growth

A method of sintering nanocrystalline material is disclosed wherein the nanocrystalline material is microwaved to heat the material to a temperature less than about 70% of the melting point of the nanocrystalline material expressed in degrees K. This method produces sintered nanocrystalline material having a density greater than about 95% of theoretical and an average grain size not more than about 3 times the average grain size of the nanocrystalline material before sintering. Rutile TiO[sub 2] as well as various other ceramics have been prepared. Grain growth of as little as 1.67 times has resulted with densities of about 90% of theoretical.
Date: April 15, 1991
Creator: Eastman, J.A.; Sickafus, K.E. & Katz, J.D.
System: The UNT Digital Library
A non-intrusive beam power monitor for high power pulsed or continuous wave lasers (open access)

A non-intrusive beam power monitor for high power pulsed or continuous wave lasers

A system and method for monitoring the output of a laser is provided in which the output of a photodiode disposed in the cavity of the laser is used to provide a correlated indication of the laser power. The photodiode is disposed out of the laser beam to view the extraneous light generated in the laser cavity whose intensity has been found to be a direct correlation of the laser beam output power level. Further, the system provides means for monitoring the phase of the laser output beam relative to a modulated control signal through the photodiode monitor.
Date: May 29, 1991
Creator: Hawsey, R. A. & Scudiere, M. B.
System: The UNT Digital Library
Separation processes using expulsion from dilute supercritical solutions (open access)

Separation processes using expulsion from dilute supercritical solutions

This invention relates to separation processes and particularly to isotope separation processes performed near the critical point of solvents for separation of solutes therefrom, and was developed pursuant to a contract with 5 the United States Department of Energy, contract number DE-AC05-84OR21400, and funded under WPF number ERKCT07.
Date: January 1, 1991
Creator: Cochran, H.D. Jr.
System: The UNT Digital Library
Solid-state NMR imaging system (open access)

Solid-state NMR imaging system

An accessory for use with a solid-state NMR spectrometer includes a special imaging probe with linear, high-field strength gradient fields and high-power broadband RF coils using a back projection method for data acquisition and image reconstruction, and a real-time pulse programmer adaptable for use by a conventional computer for complex high speed pulse sequences.
Date: January 1, 1990
Creator: Gopalsami, N.; Dieckman, S.L. & Ellingson, W.A.
System: The UNT Digital Library
Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents (open access)

Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents

An acyclonucleoside of nitroimidazole having the ability to specifically bind to tumor cells and useful for therapy, chemotherapy, imaging and radiosensitizing the tumor cells.
Date: December 31, 1990
Creator: Srivastava, Prem C. & Hasan, Ahmad
System: The UNT Digital Library
Precision wire feeder for small diameter wire (open access)

Precision wire feeder for small diameter wire

This invention is comprised of a device for feeding small diameter wire having a diameter less than .04 mm (16 mil) to a welding station which includes a driving wheel for controllably applying a non-deforming driving force to the wire to move the free end of the wire towards the welding station; and a tension device such as a torque motor for constantly applying a reverse force to the wire in opposition to the driving force to keep the wire taut. 1 fig.
Date: December 31, 1990
Creator: Brandon, E. D.; Hooper, F. M. & Reichenbach, M. L.
System: The UNT Digital Library
A backscattering spectrometry device for identifying unknown elements present in a workpiece (open access)

A backscattering spectrometry device for identifying unknown elements present in a workpiece

This invention is comprised of a backscattering spectrometry method and device for identifying and quantifying impurities in a workpiece during processing and manufacturing of that workpiece. While the workpiece is implanted with an ion beam, that same ion beam backscatters resulting from collisions with known atoms and with impurities within the workpiece. Those ions backscatter along a predetermined scattering angle and are filtered using a self-supporting filter to stop the ions with a lower energy because they collided with the known atoms of the workpiece of a smaller mass. Those ions which pass through the filter have a greater energy resulting from impact with impurities having a greater mass than the known atoms of the workpiece. A detector counts the number and measures the energy of the ions which pass through the filter. From the energy determination and knowledge of the scattering angle, a mass calculation determines the identity, and from the number and solid angle of the scattering angle, a relative concentration of the impurity is obtained.
Date: December 31, 1990
Creator: Doyle, Barney L. & Knapp, James A.
System: The UNT Digital Library
Separation of metal ions from aqueous solutions (open access)

Separation of metal ions from aqueous solutions

This invention is comprised of a process and apparatus for quantitatively and selectively separating metal ions from mixtures thereof in aqueous solution. The apparatus includes, in combination, a horizontal electrochemical flowing cell containing flowing bulk electrolyte solution and an aqueous, metal ion-containing solution, the cell containing a metal mesh working electrode, a counter electrode positioned downstream from the working electrode, an independent variable power supply/potentiostat positioned outside of the flowing cell and connected to the electrodes, and optionally a detector such as a chromatographic detector, positioned outside the flowing cell. This apparatus and its operation has significant application where trace amounts of metal ions are to be separated.
Date: December 31, 1991
Creator: Almon, A.
System: The UNT Digital Library
Noise reduction in negative-ion quadrupole mass spectrometry (open access)

Noise reduction in negative-ion quadrupole mass spectrometry

This invention is comprised of a quadrupole mass spectrometer (QMS) system having an ion source, quadrupole mass filter, and ion collector/recorder system. A weak, transverse magnetic field and an electron collector are disposed between the quadrupole and ion collector. When operated in negative ion mode, the ion source produces a beam of primarily negatively-charged particles from a sample, including electrons as well as ions. The beam passes through the quadrupole and enters the magnetic field, where the electrons are deflected away from the beam path to the electron collector. The negative ions pass undeflected to the ion collector where they are detected and recorded as a mass spectrum.
Date: December 31, 1991
Creator: Chastagner, P.
System: The UNT Digital Library
Robot arm apparatus (open access)

Robot arm apparatus

A robot arm apparatus is provided for inspecting and/or maintaining an interior of a steam generator which has an outside wall and a port for accessing the interior of the steam generator. The robot arm apparatus includes a flexible movable conduit for conveying inspection and/or maintenance apparatus from outside the steam generator to the interior of the steam generator. The flexible conduit has a terminal working end which is translated into and around the interior of the steam generator. Three motors located outside the steam generator are employed for moving the terminal working end inside the steam generator in ``x,`` ``y,`` and ``z`` directions, respectively. Commonly conducted inspection and maintenance operations include visual inspection for damaged areas, water jet lancing for cleaning sludge deposits, core boring for obtaining sludge deposits, and scrubbing of internal parts.
Date: December 31, 1990
Creator: Nachbar, H. D.
System: The UNT Digital Library