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Development of methods and procedures for high rate low energy expenditure fabrication of solar cells. Quarterly progress report No. 1, September 27--December 31, 1975

Description: The objective of this program is to develop high rate, energy efficient solar cell processing techniques based around ion implantation and elimination of all conventional thermal operations. Cells have been fabricated using an abbreviated series of vacuum process operations performed at room temperature. (auth)
Date: January 1, 1976
Creator: Kirkpatrick, A. R. & Minnucci, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional temperature history of a multipass filled weldment. Part 2. [HEATINGS]

Description: Computer simulation of the three-dimensional temperature history in a multipass filled weldment was attempted by modifying a transient heat transfer code, HEATING5. The model includes temperature-dependent physical parameters, radiation and convection heat losses, turbulent and laminar convection in the molten pool, and variable arc velocity, intensity, and weld geometry. The model requires approximately 28 CPU min to simulate one second of welding. 15 figures, 8 tables.
Date: December 21, 1976
Creator: Pinkowish, J.A. & Whitman, P.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Research and development of stabilized multifilamentary Nb/sub 3/Sn superconductors. Technical report, January 1, 1976--September 30, 1976

Description: The basic objectives of this work included: making additional test samples of 1000 A (at 12 T) conductor, scaling up the production of 3500 A conductor to larger billets, and improving the performance of 1000 A size conductor by utilizing 13.5 wt% tin-bronze rather than 10% bronze. Additional samples of 1000 A conductor were made successfully from a 51 mm diameter third-stage billet. This 1.68 x 5.00 mm conductor had a critical current of 1060 A at 12 T, 4.2 K and 10/sup -13/..cap omega.. m. A … more
Date: January 1, 1976
Creator: Ormand, F. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Superconductor design study. Final report. [Composite conductor research for carrying 10,000 A at 12T]

Description: The objective of this program was to continue the developmental effort aimed toward production of a composite conductor capable of carrying 10,000 A at 12 T and suitable for use in large fusion magnets. This program pertains specifically to the development of Nb/sub 3/Sn multifilamentary conductors containing tubular Nb filaments with Cu-Sn alloy cores in a high conductivity copper matrix. The specific tasks include: (1) Fabricate 1000 ft of 1000 A, 12 T conductor for coil evaluation. (2) Fabri… more
Date: April 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional temperature history of a multipass, filled weldment. Part 1

Description: A conceptual model is developed for the three-dimensional temperature history of a multipass, filled weldment. Property variations with temperature and phase change are included. A mathematical model and finite difference equations are derived from the conceptual model and a solution procedure for the equations is presented.
Date: October 27, 1976
Creator: Kleinschmidt, D. E.; Trinh, T. & Troiano, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ultra purification of metals by electrotransport under outer space environmental condition. Final report, April 1, 1974--September 30, 1976. [2 x 10/sup -12/ torr]

Description: A space simulation chamber capable of achieving pressures of 2 x 10/sup -12/ torr (N/sub 2/) was designed, fabricated, and used to develop a preprototype electrotransport experiment. It was demonstrated that the electrotransport purification of refractory metals could be successfully performed in the noncontaminating environment of an orbiting low-density materials laboratory such as the Molecular Shield Device. The zero gravity of outer space will also be advantageous since ''grain-sliding'' w… more
Date: January 1, 1976
Creator: Schmidt, F.A.; Lunde, B.K. & Williams, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of remelting and heat treatment on 2-1/4 Cr-1Mo steel elevated temperature tensile properties

Description: Vacuum are remelting (VAR) and electroslag remelting (ESR) processes for steam generator tubesheet forgings and tubing are to be used at the CRBR. It was found that there is essentially no significant effect on the uniaxial tensile properties of 2 1/4 Cr-1Mo steel by VAR or ESR. A summary is presented of results of a study of heat treatment combined with post weld heat treatment. It was found that regardless of the primary heat treatment, the post weld heat treatment plus in-service conditions … more
Date: September 1, 1976
Creator: Offer, H.P.; Copeland, J.F. & Yuen, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Semi-annual report on the project to design and experimentally test an improved geothermal drill bit, phase II

Description: The test facilities (the geothermal drilling vessel and the geothermal drill-bit seal tester) were completed and de-bugged, and the first tests were run on full-scale research drill bits and drill-bit seals. In addition, more materials information was gathered, and a number of additional seals of high-temperature elastomer materials were obtained for testing. Maurer Engineering, on a subcontract basis, has also been active in the design and procurement of candidate high-temperature drill-bit se… more
Date: December 1, 1976
Creator: Barker, L.M. & Green, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Large scale breeder reactor plant prototype mechanical pump conceptual design study

Description: This report includes engineering memorandums, drawings, key feature descriptions, and other data. Some of the reports, such as manufacturability and some stress analysis, were done by consultants for Byron Jackson. Review of this report indicates that the design is feasible. The pump can be manufactured to system and specification requirements. The overall length and weight of some pieces will require special consideration, but is within the scope of equipment and technology available today. Th… more
Date: July 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Large scale breeder reactor plant prototype mechanical pump conceptual design study

Description: This final report is a complete conceptual design study of a mechanical pump for a large scale breeder reactor plant. The pumps are located in the cold leg side of the loops. This makes the net positive suction head available - NPSHA - low, and is, in fact, a major influencing factor in the design. Where possible, experience gained from the Clinch River Project and the FFTF is used in this study. Experience gained in the design, manufacturer, and testing of pumps in general and sodium pumps in … more
Date: July 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Large-scale breeder reactor prototype mechanical pump conceptual design study, hot leg

Description: Due to the extensive nature of this study, the report is presented as a series of small reports. The complete design analysis is placed in a separate section. The drawings and tabulations are in the back portion of the report. Other topics are enumerated and located as shown in the table of contents.
Date: September 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sintering Kinetics of Pure and Doped Boron Carbide. Final Technical Report

Description: The sintering of pure and doped boron carbide was investigated over the temperature range 1898/sup 0/ to 2380/sup 0/K and at additive levels ranging from 0.75 to 10.0 wt%. The addition of 0.75 and 3.8 wt% of AlF/sub 3/, Ni, Fe, and Cu resulted in a deactivation in the sintering of boron carbide at all temperatures. In contrast, the addition of 10.0 wt% of these dopants resulted in enhanced shrinkage in B/sub 4/C for the temperatures 1898m and 2133/sup 0/K. At the highest temperature, 2380/sup 0… more
Date: January 1, 1976
Creator: Lange, R. G. & Munir, Z. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Burrs produced by grinding

Description: An investigation was conducted to determine the influence of variables in controlling the size and repeatability of grinding burrs to minimize burr-removal costs and improve the quality and reliability of parts for small precision mechanisms. Each of the three types of burrs produced by surface-grinding a rectangular block responds differently to changes in cutting conditions. Reducing the downfeed rate generally produces shorter burrs. Although the size of the abrasive grain affected the thick… more
Date: August 1, 1976
Creator: Gillespie, L. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of thick film conductor inks

Description: A project undertaken to determine the ink characteristics affecting fired films is described. The analytical methods used were thermogravimetric analysis, pryolysis-gas chromatography, infrared spectrophotometry, mass spectrometry, atomic absorption spectrophotometry, scanning electron microscopy with energy dispersive x-ray spectroscopy, and particle size analysis using a Coulter counter.
Date: September 1, 1976
Creator: Brewer, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Large area silicon sheet by EFG. Fourth quarterly report, October 1--December 31, 1976

Description: During this reporting period, 5 cm wide ribbons, some with no measurable residual stress, have been grown at speeds up to 5 cm/min. The relationship between residual stress and system vertical temperature gradient was further defined. The problems associated with the purity of the ribbons are being investigated. The influence of light on the recombination characteristics of defects in the ribbons has been investigated. Procedures and results are reported.
Date: December 15, 1976
Creator: Morrison, A. D.; Ravi, K. V.; Hari Rao, C. V.; Surek, T.; Bliss, D. F.; Garone, L. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy and technology review. [NONE]

Description: The articles describe the electric gun, a versatile tool for studying initiation properties of explosives; microcomputers and computer networks; and the preferred parts concept, which may mean that metric conversion will pay for itself by elimination of duplication. Brief items also report on progress in geothermal programs, the lithium--water--air battery program, and uncertain conclusions in the study of ozone depletion. 6 figures. Separate abstracts are prepared for the individual articles f… more
Date: August 1, 1976
Creator: Selden, R. W.; Crawford, R. B.; Cummings, K. L. & Prono, J. K. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lithium--water--air battery project: progress during the month of May 1976. [Study of Li/Br analog]

Description: A technique was developed for the rapid and accurate determination of current efficiency for lithium dissolution through the measurement of the steady-state, nonequilibrium hydrogen gas evolution rate from closed lithium--water cells. A technique for preparing alloys of lithium through arc melting was developed. The results of the polarization studies on the first set of samples show no marked effect of Ca or Al dopants on film conductivity. A lithium--bromine analog of the lithium--water batte… more
Date: June 3, 1976
Creator: Cooper, J. F.; Hosmer, P. K. & Homsy, R. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Joining NbTi superconductors by ultrasonic welding

Description: An important consideration in the design and construction of large, high-field, superconducting magnets is the capability to fabricate reliable, high-strength, low-resistance joints. A process for joining NbTi, copper stabilized, superconducting composites by ultrasonic welding is described. This process yields a joint strength comparable to that of the superconducting composite and a resistivity significantly lower than achieved by conventional soft soldering. The superconducting properties of… more
Date: January 1, 1976
Creator: Hafstrom, J. W.; Killpatrick, D. H.; Niemann, R. C.; Purcell, J. R. & Thresh, H. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Systems for Nuclear Auxiliary Power annual report, government fiscal year 1976/TQ

Description: The overall objective of the Systems for Nuclear Auxiliary Power (SNAP) Program is to continue system and component engineering activities relating to the zirconium hydride (ZrH) reactor. The specific objectives for FY 1976/TQ were to: (1) study standardized ZrH reactor space power systems and components, (2) perform preconceptual analysis and design of ZrH reactor--organic Rankine power systems for subsea applications, (3) conduct fuel and hydrogen barrier investigations, (4) perform system st… more
Date: September 30, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brayton Isotope Power System (BIPS) facility specification

Description: General requirements for the Brayton Isotope Power System (BIPS)/Ground Demonstration System (GDS) assembly and test facility are defined. The facility will include provisions for a complete test laboratory for GDS checkout, performance, and endurance testing, and a contamination-controlled area for assembly, fabrication, storage, and storage preparation of GDS components. Specifications, schedules, and drawings are included.
Date: May 31, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser contoured and drilled substrates for thick film applications. Final report

Description: The feasibility of using laser contoured and drilled substrates for thick film circuits was demonstrated. Laser contouring and drilling was found to provide the dimensional accuracy required by product and the finished product was proven capable of withstanding the thermal stresses imposed by the required thermal shock tests conducted on the product.
Date: September 1, 1976
Creator: Uribe, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated array assembly. Quarterly report No. 3, July 1, 1976--September 30, 1976

Description: A review of the quality of the various possible forms of the starting silicon material leads to the conclusion that wafers from Czochralski-pulled ingots are the only form of silicon which will be available for automated array processing for the next several years. A new calculational procedure has been developed and tested for the optimization of performance of both the front and back contact metallizations. The survey of present-day contact and interconnect metallization technology for silico… more
Date: September 1, 1976
Creator: Williams, B. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phase I of the automated array assembly task of the low cost silicon solar array project. Technical quarterly report No. 3

Description: A matrix of possible process steps is presented. Each process is evaluated by suitability criteria and categorized with respect to future usefulness. From the processes which have a high probability of incorporation into a future manufacturing factory, a possible process sequence is chosen. Studies of detailed cost analysis and factory projections have been initiated. Reliability considerations are discussed for module interconnections and encapsulant materials.
Date: October 1, 1976
Creator: Coleman, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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