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1,181 Matching Results
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Annual Summary Research Report of Chemistry, Engineering, Metallurgy, Physics, and Reactor Divisions, July 1, 1965-June 30, 1966
None
Date:
July 1, 1966
Creator:
unknown
System:
The UNT Digital Library
Optically active biological particle-distinguishing apparatus
The disclosure is directed to organic particle sorting and identification. High frequency pulses of circularly polarized light, alternating between left and right, intersect a fast moving stream of organic particles. Circular intensity differential scattering and linear intensity differential scattering are monitored to uniquely identify a variety of organic particles.
Date:
unknown
Creator:
Salzman, G.C. & Kupperman, R.H.
System:
The UNT Digital Library
Stabilized aqueous foam systems, concentrate for producing a stabilized aqueous foam and method of producing said foam
This invention comprises a combination of a water soluble polymer of the polyacrylic acid type, a foam stabilizer of dodecyl alcohol, a surfactant, a solvent and water as a concentrate for use in producing stabilized aqueous foams. In another aspect, the invention comprises a solution of the concentrate with water. In still another aspect the invention includes a method of generating stabilized aqueous foams. The stable foams have utility in security systems.
Date:
unknown
Creator:
Rand, P.B.
System:
The UNT Digital Library
Training for College and University Faculty and Students at Argonne National Laboratory 1967-1970
None
Date:
1970~
Creator:
unknown
System:
The UNT Digital Library
LIGHT EMITTING DlODE TESTING AND ANALYSIS
This report covers the work done to analyze the optical output of a Light Emitting Diode. This diode consists' of a Monsanto MV2 LED chip in an MV50 package. A calculator based instrumentation system is described including programming techniques used to reduce and display data. A Light Instrumentation System with specially designed fiber optic cables is described which gathers data for processing by the calculator based instrumentation system. Future work will include analysis of the RCA 8571 Photomultiplier Tube.
Date:
August 1, 1973
Creator:
Bowers, J L & Allen, T E
System:
The UNT Digital Library
MASK GENERATION
Four specifications were written to describe requirements of microcircuit photomask generation and quality control. Processes developed were grouped under categories of layout and generation, inspection, serializing, and cleaning, handling, and storage.
Date:
September 1, 1973
Creator:
Schantz, L E
System:
The UNT Digital Library
IMPACT TESTING OF MATERIALS USING AN EIGHT-INCH AIR GUN AND COMPUTER REDUCTION OF DATA
A mechanical shock actuator has been converted into an air gun capable of firing 8-inch-·diameter (20.32 cm) projectiles to velocities exceeding 1000 fps (304.8 m/ s). This new capability has been used to study the effect of impact velocity upon the energy.absorbed by crushable materials. Shockpulse data is reduced by computer techniques and test results are displayed in either tabular or graphic format by use of the C DC 6600 Calcomp plotter.
Date:
October 1, 1973
Creator:
Thorne, L. F.
System:
The UNT Digital Library
IMPROVED WORK DIRECTORS
Activities aimed at improving work directors which program the instructions required for fabricating printed wiring board assemblies included designing solid-state switching circuitry for improved reliability, evaluating interface cabling techniques, studying visual-aid display-lamp mounting, and packaging innovations for product interface and troubleshooting convenience. The prototype solid-state work director functions satisfactorily. Recommendations for the design and fabrication of future work directors include wire-wrapped terminal construction technique and use of light-emitting diodes to replace conventional incandescent lamps.
Date:
November 1, 1973
Creator:
Carter, R C
System:
The UNT Digital Library
IVESTIGATION OF POLYSULFIDE CONFORMAL COATING
An investigation of the properties of foamed polysulfide (Thiokol) compounds revealed several properties which had previously escaped notice. These properties included lack of thermal stability, attack by hot epoxy resins, and differences among compounds prepared by different vendors. Details of these findings and their significance are discussed.
Date:
March 1, 1974
Creator:
Camp, C J
System:
The UNT Digital Library
DEVELOPMENT OF A FORMING STATION
A forming station has been designed and fabricated. The forming stations allow automatic control of the pressure, temperature, vacuum, and cooling cycles required for pressure/vacuum dies used to form or bond aluminum-Mylar laminate, Mylar films, and polycarbonate sheets.
Date:
August 1, 1974
Creator:
Sheeley, J D
System:
The UNT Digital Library
EFFECTS OF VARYING FORMULATIONS OF THREE TDI POLYURETHANE FOAMS
Studies were conducted on three TDI polyurethane foam materials to improve production yields of molded-to-size parts. The effects of changes in cell. stabilizers, emulsifiers, catalysts, and the blowing agent were investigated. To evaluate formulation modifications, tests were performed to determine compressive strength, foam reactivity, and free-rise density. Changes in the visual appearance were also documented. Silicone surfactants were found to be superior to organic emulsifiers. In addition, an increase in water content produced parts rated superior to those produced by using the standard formulation for one material, Rigifoam 6003-2.5.
Date:
August 1, 1974
Creator:
Taylor, R F & DeGisi, S L
System:
The UNT Digital Library
Evaluation of a High Temperature Syntactic Foam
The mechanical, physical, and thermal properties of a glass microballoon-filled polybenzimidazole resin have been measured for test specimens molded by three manufacturing processes. The material, Imidite X386, has been shown to be a high strength, thermally stable structural foam.
Date:
August 1, 1974
Creator:
McIlroy, H. M.
System:
The UNT Digital Library
PLATING ON POLYIMIDE
Electroless coatings of nickel and copper from five electroless solutions were deposited on polyimide. Thicknesses approaching 90 microinches (2.3 micrometers) could be obtained but increasing the coating thickness beyond 90 microinches could only be achieved by electroplating. Four etching solutions for polyimides were investigated to determine their effect on the adhesion of the electroless coating to the polyimide.
Date:
August 1, 1974
Creator:
Stimetz, C J
System:
The UNT Digital Library
ROUND-WIRE LAMINATED FLAT CIRCUITS
Round-wire, laminated flat cables provide an additional manufacturing capability that is particularly suited for development applications and few-of-a-kind production. These laminated cables do not require the special tooling that is necessary for molded cables; therefore, cost and lead time are reduced. Layup, lamination, and contouring techniques were developed for complex cable configurations, including small-radius bends and multiple breakouts.
Date:
August 1, 1974
Creator:
Hile, R A
System:
The UNT Digital Library
ULTRASONIC WELDING OF ELECTRICAL TERMINATIONS
Smooth weld tip and anvil surfaces are recommended; electrical discharge machining (EDM) surface finishes damage weld materials. Copper-to-aluminum samples showed no weld degradation following environmental tests. Materials must be of similar hardness to achieve high quality welds, and soft materials are sensitive to machine parameter changes.
Date:
August 1, 1974
Creator:
Darner, G S
System:
The UNT Digital Library
AUTOMATIC RADAR-SENSITIVITY MEASUREMENT
This work resulted in development of the necessary techniques to automatically measure radar receiver and system sensitivity. Both measurement speed and repeatability are improved over that possible by manual methods. Combined logic and analog techniques were used to derive a system suitable for both in-process and final-assembly tests on radar systems and rf subassemblies.
Date:
September 1, 1974
Creator:
Hardinger, K E
System:
The UNT Digital Library
Detection and Suppression of Transistor Oscillation During Power Burn-In
A method has been developed for suppressing parasitic oscillation of transistors operating under test conditions through the use of ferrite cores and capacitors. The Hewlett-Packard Model 8554L spectrum analyzer is recommended for detecting unknown rf noise.
Date:
September 1, 1974
Creator:
Schmitt, R. W.
System:
The UNT Digital Library
MASS ANODIZATION OF TANTALUM-NITRIDE RESISTORS
Mass anodization of tantalum-nitride films with sheet resistivities not exceeding 200 ohms per square to meet ±10-percent tolerance requirements on resistors above 100 ohms has been shown feasible. The anodization system that was developed for this study is capable of producing yields of approximately 80 percent under those conditiohs. Although anodization trimming on films with sheet resistivities as high as 600 ohms per square is now feasible, further work is necessary to successfully anodize films above 600 ohms per square and resistors below 100 ohms.
Date:
September 1, 1974
Creator:
Peltier, A J
System:
The UNT Digital Library
TEMPERATURE DEPENDENT PROPERTIES OF POTTING MATERIALS
The mechanical, electrical, and thermal properties of a general purpose epoxy potting compound, filled with either glass microspheres or aluminum oxide and catalyzed with either diethanolamine or Epon Z are discussed. Twelve formulation-cure cycle combinations were chosen for evaluation. The temperature properties from -65 to 400°F (-54 to 204°C) of four of the combinations are given. Modulus versus temperature polynomials were calculated for the diethanolamine catalyzed material.
Date:
September 1, 1974
Creator:
Walker, J M
System:
The UNT Digital Library
USE OF EN-7 TO ENCAPSULATE ANALYZER ASSEMBLIES
The feasibility of using EN-7 as a substitute for Adiprene L100 curing agent for analyzer encapsulation was investigated. Since many analyzer assemblies cannot tolerate the usual EN-7 cure temperatures, this investigation was limited to a maximum cure temperatureof 710°C. The results of these tests indicate that a 20-hour cure at 490°C is adequate to provide sufficient hardness if followed by additional room-temperature cure.
Date:
September 1, 1974
Creator:
Elmore, R D
System:
The UNT Digital Library
DEFECT DETECTION IN HIGH-DENSITY BRAIDED SHIELDS
A radiographic image analyzer and a modified shielded-enclosure leak-detection system were successful in determining the cable shield coverage and the freedom from leakage necessary to prevent interference caused by electromagnetic radiation pickup on interconnecting cables. Other systems are being considered, and further evaluation and refinement are necessary to provide reliable methods for in-process manufacturing tests and product analysis.
Date:
October 1, 1974
Creator:
Belarde, E
System:
The UNT Digital Library
EFFECTS.OF BORIC ACID ON THE CURE OF BORON-FILLED Y-3602 SILICONE GUM
The first two phases of a program designed to determine the effects of boric acid on the cure of Y-3602 silicone gum were conducted to evaluate extraction solvents and extraction time. The standard production formulation of B10-filled Y-3602 silicone gum was used in these evaluations. Results showed that the best solvent for reproducibility and high amine content was chloroform. The second phase indicated that extraction was essentially complete at the end of 4 hours.
Date:
October 1, 1974
Creator:
Leichliter, G E
System:
The UNT Digital Library
MAXIMUM HUMIDITY INDICATOR
Moisture-sensitive systems to measure and indicate the maximum level of humidity exposure are discussed. A chemical indicator utilizing deliquescent salts and water-soluble dyes provides an irreversible color change at discrete levels of relative humidity. To provide indication of the time at which the exposure occurs, a circuit employing a resistive-type sensor was developed. A small, commercially available sensor is used in a portable probe to detect humidity leaks into controlled areas.
Date:
October 1, 1974
Creator:
Abel, W B
System:
The UNT Digital Library
A Rapid Tcr Test Method for Tantalum-Nitride Resistive Films
Taking two resistance readings, at room temperature and at -196°C when the substrate is submerged in liquid nitrogen provides a convenient means of measuring the TCR of tantalum-nitride films. The liquid nitrogen provides a large, controlled temperature differential that can be used conveniently in the production environment. A digital-readout tester with only a simple nulling adjustment makes it possible to read the TCR of the film directly on the DVM indicator. This method provides the prompt TCR information feedback necessary to control the tantalum-nitride sputtering process and results in substantial time and materials savings.
Date:
October 1, 1974
Creator:
Laudel, A.
System:
The UNT Digital Library