104 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Organic Oxygen Compounds"  
Results: 1 - 24 next
open access

Kilowatt Isotope Power System: component report for the Ground Demonstration System Accumulator

Description: The Model Number ORC1A3A01 System Accumulator for the Kilowatt Isotope Power System was expulsion tested and demonstrated to be in compliance with the requirements of Sundstrand Explusion Test Procedure, TP 400. Test requirements of TP 400 were extracted from the Kilowatt Isotope Power System, Ground Demonstration System Test Plan.
Date: January 31, 1978
Creator: Brainard, E.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

TFTR coil case design

Description: The TFTR (TOKAMAK Fusion Test Reactor) TF (Toroidal Field) coil cases are highly loaded structures designed within severe constraints. Foremost among these are basic machine geometry, material characteristics of both the case and the copper/epoxy matrix it supports, and overall cost. Scoping and parametric studies have been performed continuously since conceptual design. The progression of design decisions including coil shape, support locations and their stiffnesses, material selection, and el… more
Date: January 1, 1977
Creator: Pusateri, J.; Barnes, G. & Citrolo, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of high-mechanical strength electrical insulations for tokamak toroidal field coils

Description: The electrical insulation for the TF (Toroidal Field) coils is subjected to a high interlaminar shear, tensile and compressive stresses. Two candidate epoxy/glass fiber systems using prepreg and vacuum impregnation techniques were evaluated. Specimens were prepared and processed under controlled conditions to simulate specification manufacturing procedures. The strengths of the insulation were measured in interlaminar shear, tension, compression, and combined shear and compression statically. S… more
Date: January 1, 1977
Creator: Burke, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of water-bearing fiber in Kevlar 49-epoxy composites

Description: Water has been observed to be adsorbed, and possibly absorbed, by desiccated Kevlar 49 fiber to 6 percent of the fiber weight in 100 percent relative humidity. The effect of the water on the transverse flexural strength and elastic modulus of an aliphatic amine-cured epoxy, unidirectionally reinforced with saturated Kevlar 49, has been determined. Such composites are weaker than those made with fiber equilibrated to 0 percent relative humidity, and the effect persists after a 75/sup 0/C, 16-h p… more
Date: January 1, 1978
Creator: Moss, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Composite-rim flywheel design

Description: The design of a flywheel which incorporates a circumferentially wound rim is described. The design required the selection of materials and configuration for rim and hub, and a means of attaching the rim to the hub. The method used to fabricate prototype flywheels of this design is discussed.
Date: January 1, 1977
Creator: Reedy, E.D. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

System for vacuum pouring of epoxy tensile and impact specimens with a study of the behavior of these specimens at 77 K and 293 K

Description: The purpose of the investigation was to establish a suitable technique for vacuum pouring of epoxy test specimens and to study the behavior of these specimens at 77 K and 293 K. A series of tensile and impact tests was conducted using specimens made from the following resins: Epon 828, Epon 871, and Epon curing agent Z. These materials are of general interest to designers of magnets for cryogenic service. Tests of the specimens were carried out at 77 K and 293 K. The 77 K data indicate that ten… more
Date: March 31, 1978
Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of the surface structures of molecular crystals and of adsorbed molecular monolayers on the (111) crystal faces of platinum and silver by low-energy electron diffraction

Description: The structures of molecular crystal surfaces were investigated for the first time by the use of low-energy electron diffraction (LEED). The experimental results from a variety of molecular crystals were examined and compared as a first step towards understanding the properties of these surfaces on a microscopic level. The method of sample preparation employed, vapor deposition onto metal single-crystal substrates at low temperatures in ultrahigh vacuum, allowed concurrent study of the structure… more
Date: January 1, 1977
Creator: Firment, L.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiation effects on insulators for superconducting magnets

Description: In order to determine the radiation stability of electrical insulation that could be used in a superconducting magnet for containment of the plasma in a fusion energy device, 55 specimens of eight types of organic insulation were irradiated to a dose of about 2 x 10/sup 8/ R (2 x 10/sup 6/ J/Kg) at a temperature of 4.8 K in the Low-Temperature Irradiation Facility in the Bulk Shielding Reactor at Oak Ridge National Laboratory. Four of the specimens were monitored for changes in electrical resis… more
Date: January 1, 1978
Creator: Kernohan, R.H.; Coltman, R.R. Jr. & Long, C.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Alternate materials of construction for geothermal applications. Progress report No. 13, April--June 1977

Description: A program to determine if non-metallic materials such as polymers, concrete polymer composites, and refractory cements can be utilized as materials of construction in geothermal processes is in progress. To date, several high temperature polymer concrete systems have been formulated, laboratory and field tests performed in brine, flashing brine, and steam at temperatures up to 260/sup 0/C, and economic studies started. Laboratory data for exposure times greater than 2 years are available. Resul… more
Date: June 1, 1977
Creator: Steinberg, M. & Kukacka, L. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical characterization of selected adhesives and bulk materials at liquid nitrogen and room temperatures

Description: This paper presents the results of a series of mechanical tests on selected adhesives and bulk materials. The materials tested are of general interest to designers of magnets for cryogenic service and include several epoxies, a varnish, a B-stage glass cloth, insulation papers, and commercially available fiber-reinforced composites. These tests were performed at room temperature (293 K) and at liquid nitrogen temperature (77 K). The tests include both simple tension tests and lap shear tests wi… more
Date: January 1, 1977
Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Time-dependent properties of fiber composites for energy-storage flywheels

Description: Time-dependent deformation and time-dependent strength are being characterized for several candidate polymeric composites for flywheels. This presentation highlights the motivation and the philosophy of the characterization adopted by the authors in establishing the ongoing programs at LLL. This overview is intended to provide a basis for inferring the type of enginering data being generated for different aspects of flywheel design. The details of these data can be obtained from the published r… more
Date: October 25, 1977
Creator: Wu, E.M. & Penn, L.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Kevlar 49-Epoxy insulator

Description: Kevlar 49-Epoxy composite structural insulators were fabricated from two and three dimensionally reinforced material. The insulator configuration was that of a cylindrical cup having both external and internal threads. Electrical and mechanical property data was obtained for test samples of both materials. Relatively little difference in electrical properties was obtained for the two materials; however, the mechanical properties varied markedly. The transverse strength of the two dimensionally … more
Date: January 1, 1978
Creator: Ericksen, R.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis of block copolymers of methyl siloxane, phenyl siloxane, vinyl siloxane, etc

Description: Synthesis of homo poly(dimethylsiloxane) PDMS, homo poly(diphenylsiloxane PDPS, and di- and tri- block copolymers of PDMS and PDPS have been carried out by anionic living polymerization, using the following reagents: hexamethylcyclotrisiloxane, HMTS and hexaphenylcyclotrisiloxane, HPTS (monomers), n-BuLi and dilithium diphenyldisilanolate, DLS (initiators), DMSO and THF (promoters) and Toluene (solvent). Lithium based catalysts are used in order to minimize siloxane rearrangement (equilibration… more
Date: June 30, 1979
Creator: Ibemesi, J.A. & Meier, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of advanced composites in tokamak magnet systems

Description: The use of advanced (high-modulus) composites in superconducting magnets for tokamak fusion reactors is discussed. The most prominent potential application is as the structure in the pulsed poloidal-field coil system, where a significant reduction in eddy currents could be achieved. Present low-temperature data on the advanced composites are reviewed briefly; they are too meager to do more than suggest a broad class of composites for a particular application.
Date: November 1, 1977
Creator: Long, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seal, dynamic inflatable, development test, installation and removal of

Description: This specification establishes the requirements and procedures (using epoxy adhesive) for the installation and removal of the dynamic inflatable test seal for the Fast Flux Test Facility (FFTF), In-Vessel Handling Machine (IVHM) Reactor Refueling Plug (RRP).
Date: June 10, 1974
Creator: Deboi, H.H. & Ferrante, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of improved insulation materials. Final technical report, September 1,1978-September 30, 1979

Description: Evaluations of three types of silicone foam, on which Dow Corning holds patent rights, for use as insulation in flat plate solar collectors. The three types of foam were: Type IA: a two part, room temperature curing foam cross-linked through identical with SiOSi identical with linkages; Type IB: a one-part, heat activated foam also crosslinked through identical with SiOSi identical with bonds; and Type II: a two-part, room temperature curing foam cross-linked with =NCOS(CH/sub 2/)/sup 3/ identi… more
Date: September 1, 1979
Creator: Rabe, J A; Spells, S; Homan, G R; Rasch, D M; Lee, C L & Parmele, R C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser cutting of Kevlar laminates

Description: An investigation has been conducted of the use of laser energy for cutting contours, diameters, and holes in flat and shaped Kevlar 49 fiber-reinforced epoxy laminates as an alternate to conventional machining. The investigation has shown that flat laminates 6.35 mm thick may be cut without backup by using a high-powered (1000-watt) continuous wave CO/sub 2/ laser at high feedrates (33.87 mm per second). The cut produced was free of the burrs and delaminations resulting from conventional machin… more
Date: September 1977
Creator: VanCleave, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis, chemistry, and catalytic activity of complexes of lanthanide and actinide metals in unusual oxidation states and coordination environments. Progress report, February 1, 1977--January 31, 1978

Description: Research devoted to synthesis of new classes of lanthanide and actinide complexes is reported. Co-condensation of lanthanide metals with 1,3-butadiene (1,3-C/sub 4/H/sub 6/) or 2,3-dimethyl-1,3-butadiene (2,3-(CH/sub 3/)/sub 2/-1,3-C/sub 4/H/sub 4/) produces three types of organolanthanide complexes differentiated by their solubility in pentane, toluene and tetrahydrofuran (THF). The THF soluble species are formed in highest yield and have been most completely characterized. Elemental analysis … more
Date: October 1, 1977
Creator: Evans, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ab Initio quantum mechanical characterization of the ground electronic state of benzo(a)pyrene. Implications for the mechanism of PAH oxidation to expoxides by cytochrome P-450

Description: Electronic properties have an important role in the metabolism of benzo(a)pyrene (BP) and the mutagenic action of its metabolites. In this paper, the ground electronic state of BP is characterized by the ab initio molecular fragment floating spherical Gaussian orbital method, and a speculative structural-electronic mechanism is presented for the oxidation of PAHs to epoxides by cytochrome P-450.
Date: January 1, 1977
Creator: Shipman, L M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Cyclooctatetraeneactinide(IV) bis-borohydrides

Description: In order to take advantage of the known volatility of actinide borohydride complexes, attempts were made to prepare half-sandwich borohydrides (RCOT)M(BH/sub 4/)/sub 2/, where COT is cyclooctatetraene and M is Th or U. The borohydrides were formed as complexes with THF solvent. Spectra and chemical reactions of these compounds were investigated. (DLC)
Date: December 1, 1979
Creator: Solar, J.P.; Streitwieser, A. Jr. & Edelstein, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of Electrochemical Photovoltaic Cells. Second Technical Progress Report, August 1, 1979-October 31, 1979

Description: The development of stable, efficient, photoelectrochemical cells based on silicon and gallium arsenide in non-aqueous electrolyte systems is being investigated. Redox reactions of ferrocene, anthracene and anthraquinone have been studied on platinum and n-silicon electrodes. The latter have been further characterized by differential capacitance measurements. Cells and equipment have been designed and set up for long-term stability studies.
Date: November 21, 1979
Creator: Austin, A. E.; Byker, H. J. & Brooman, E. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Exploratory research, Tasks A, B, C, and D. Final report, August 17-December 31, 1977

Description: SRI International has conducted research on the upgrading of computerized thermo-hydro code calculations and the synthesis of energetic materials. This project comprised four tasks, as follows: Task A included: (1) formulating routines for inverting the P = P(T,V) and V = V(T,P) equations of state when isotherms exhibit a van der Waals' loop; (2) incorporating these routines into the TIGER code so V and T can be used as independent variables in computing thermodynamic functions of liquids exhib… more
Date: February 17, 1978
Creator: Simon, Robert L.; Coon, Clifford L.; Cowperthwaite, Michael & Sincich, Eugene
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen