Search Results

Advanced search parameters have been applied.
open access

Industry-Government-University Cooperative Research Program for the Development of Structural Materials from Sulfate-Rich FGD Scrubber Sludge

Description: The main aim of our project was to develop technology, which converts flue gas desulfurization (FGD) sulfate-rich scrubber sludge into value-added decorative materials. Specifically, we were to establish technology for fabricating cost effective but marketable materials, like countertops and decorative tiles from the sludge. In addition, we were to explore the feasibility of forming siding material from the sludge. At the end of the project, we were to establish the potential of our products by… more
Date: August 31, 2003
Creator: Malhotra, V. M. & Chugh, Y. P.
Partner: UNT Libraries Government Documents Department
open access

On the Existence of Pathological Detonation Waves

Description: Pathological detonation waves with velocities greater than Chapman-Jouguet (C-J) have been proposed theoretically but never observed experimentally in gaseous, liquid or solid explosives. Two types of pathological chemical reaction zones have been identified within the Zeldovich-von Neumann-Doring (ZND) model: an exothermic chemical decomposition with a mole decrease during from the von Neumann spike state to the C-J state and an exothermic reaction followed by an endothermic reaction (eigenval… more
Date: July 11, 2003
Creator: Tarver, Craig M.
Partner: UNT Libraries Government Documents Department

[DIVA members sitting near food tables]

Description: Photograph of members of the Dallas Independent Volleyball Association sitting in chairs in a conference room at the recreational center where they have gathered to eat. There are others standing behind them and tables with food are visible behind them.
Date: July 19, 2003
Partner: UNT Libraries Special Collections
open access

A brief examination of optical tagging technologies.

Description: Presented within this report are the results of a brief examination of optical tagging technologies funded by the Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories. The work was performed during the summer months of 2002 with total funding of $65k. The intent of the project was to briefly examine a broad range of approaches to optical tagging concentrating on the wavelength range between ultraviolet (UV) and the short wavelength infrared (SWIR, {lambda}… more
Date: July 1, 2003
Creator: Ackermann, Mark R.; Cahill, Paul A. (Aspecular Optics, Dayton, OH); Drummond, Timothy J. & Wilcoxon, Jess Patrick
Partner: UNT Libraries Government Documents Department
open access

Use of step scan FT-IR and multivariate curve resolution to understand aging of propellant binder as a function of depth into the polymer material.

Description: A sample of polymeric propellant binder was aged from 0 to 60 days at 95 C and analyzed using FT-IR step scan photoacoustic spectroscopy. This technique has the ability of to obtain spectra of the polymer as a function of depth into the polymer material. Multivariate curve resolution was applied to the spectra data obtained to extract the contributions of the aged and un-aged spectral components from the spectra. It was found that multivariate curve resolution could efficiently separate highly … more
Date: January 1, 2003
Creator: Rivera, Dion Arledge & Alam, Mary Kathleen
Partner: UNT Libraries Government Documents Department
open access

DEVELOPMENT OF ATTRITION RESISTANT IRON-BASED FISCHER-TROPSCH CATALYSTS

Description: Fischer-Tropsch (FT) synthesis to convert syngas (CO + H{sub 2}) derived from natural gas or coal to liquid fuels and wax is a well-established technology. For low H{sub 2} to CO ratio syngas produced from CO{sub 2} reforming of natural gas or from gasification of coal, the use of Fe catalysts is attractive because of their high water gas shift activity in addition to their high FT activity. Fe catalysts are also attractive due to their low cost and low methane selectivity. Because of the highl… more
Date: December 1, 2003
Creator: Adeyiga, Adeyinka A.
Partner: UNT Libraries Government Documents Department
open access

SUPPORTED DENSE CERAMIC MEMBRANES FOR OXYGEN SEPARATION

Description: This project addresses the need for reliable fabrication methods of supported thin/thick dense ceramic membranes for oxygen separation. Some ceramic materials that possess mixed conductivity (electronic and ionic) at high temperature have the potential to permeate oxygen with perfect selectivity, making them very attractive for oxygen separation and membrane reactor applications. In order to maximize permeation rates at the lowest possible temperatures, it is desirable to minimize diffusional l… more
Date: March 1, 2003
Creator: Ward, Timothy L.
Partner: UNT Libraries Government Documents Department
open access

The Elusive Coefficients of Thermal Expansion in PBX 9502

Description: PBX 9502 has been in war reserve service for over two decades. Ninety-five percent of the solid phase of this insensitive high explosive is composed of energetic crystallites designated as TATB (1,3,5-triamino-2,4,6-trinitrobenzene), held together by the remaining solid fraction--an inert, polymeric binder named Kel-F 800. The unusual combination of extreme insensitivity and adequate performance characteristics is not the only enigmatic feature of such TATB-based materials. In this report, we d… more
Date: May 1, 2003
Creator: Skidmore, C. B.; Butler, T. A. & Sandoval, C. W.
Partner: UNT Libraries Government Documents Department
open access

Corrosion tests with uranium- and plutonium-loaded ceramic waste forms.

Description: Tests were conducted with ceramic waste form (CWF) materials that contained small amounts of uranium and plutonium to study their release behavior as the CWF corroded. Materials made using the hot isostatic press (HIP) and pressureless consolidation (PC) methods were examined and tested. Four different materials were made using the HIP method with two salts having different U:Pu mole ratios and two zeolite reagents having different residual water contents. Tests with the four HIP U,Pu-loaded CW… more
Date: January 9, 2003
Creator: Morss, L. R.; Johnson, S. G.; Ebert, W. L.; DiSanto, T.; Frank, S. M.; Holly, J. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Corrosion tests to determine temperature and pH dependencies of the dissolution rates of sodalite, binder glass, and ceramic waste form.

Description: A glass bonded-sodalite ceramic waste form (CWF) has been developed to immobilize salt wastes from electrometallurgical treatment of sodium-bonded spent nuclear fuel. The CWF is a composite of salt-loaded sodalite and a binder glass formed at high temperature (850-950 C) by hot isostatic pressing (HIP) or pressureless-consolidation (PC) processes. A waste form degradation and radionuclide release model has been developed to support qualification of the CWF for disposal in the proposed repositor… more
Date: February 12, 2003
Creator: Jeong, S.-Y.; Fanning, T. H.; Morss, L. R. & Ebert, W. L.
Partner: UNT Libraries Government Documents Department
open access

Screening report on cell materials for high-power Li-Ion HEV batteries.

Description: The Battery Technology Department at Argonne National Laboratory is a major participant in the U.S. Department of Energy's Advanced Technology Development (ATD) program. This multi-national laboratory program is dedicated to improving lithium-ion batteries for high-power HEV and FCEV applications. As part of the FreedomCAR Partnership, this program is addressing the three key barriers for high-power lithium-ion batteries: calendar life, abuse tolerance, and cost. All three of these barriers can… more
Date: April 24, 2003
Creator: Liu, J.; Kahaian, A.; Belharouak, I.; Kang, S.; Oliver, S.; Henriksen, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Measurement of inter-strand contact resistance in epoxy impregnated Nb3Sn Rutherford cables

Description: An apparatus for the measurement, under transverse pressure, of the inter-strand contact resistance in epoxy-impregnated Nb{sub 3}Sn Rutherford cables has been recently assembled at Fermilab. Procedures have been developed to instrument and measure samples extracted from Nb{sub 3}Sn coils. Samples were extracted from coils fabricated with the Wind-and-React and the React-and-Wind technology, both presently under development at Fermilab. A ceramic binder is used to improve the insulation and to … more
Date: October 7, 2003
Creator: al., Giorgio Ambrosio et
Partner: UNT Libraries Government Documents Department
open access

Binder/HMX interaction in PBX9501 at Elevated Temperatures

Description: Plastic bonded explosives (PBX) generally consist of 85 - 95 % by weight energetic material, such as HMX, and 5 - 15 % polymeric binder. Understanding of the structure and morphology at elevated temperatures and pressures is important for predicting of PBX behavior in accident scenarios. The crystallographic behavior of pure HMX has been measured as functions of temperature and grain size. The investigation is extended to the high temperature behavior of PBX 9501 (95% HMX, 2.5 % Estane, 2.5 % B… more
Date: October 2, 2003
Creator: K., S C & M., T C
Partner: UNT Libraries Government Documents Department
open access

Deflagration Behavior of HMX-Based Explosives at High Temperatures and Pressures

Description: We report the deflagration behavior of several HMX-based explosives at pressure from 10-600 MPa and temperatures from 20-180 C. We have made laminar burn rate measurements with the LLNL High Pressure Strand Burner, in which burn wires are used to record the time-of-arrival of the burn front in the cylindrical sample as a function of pressure. The explosive samples are 6.4 mm in diameter and 63 mm long, with ten burn wires embedded at different positions in the sample. Burning on the cylindrical… more
Date: November 20, 2003
Creator: Maienschein, J L & Wardell, J F
Partner: UNT Libraries Government Documents Department
open access

IMPROVEMENT OF WEAR COMPONENT'S PERFORMANCE BY UTILIZING ADVANCED MATERIALS AND NEW MANUFACTURING TECHNOLOGIES: CASTCON PROCESS FOR MINING APPLICATIONS

Description: The project continued in this reporting period with focus on three issues: (1) failure analysis of the FM inserts tested in the field, (2) continued study of confinement burn-out, and (3) disc cutter manufacturing. The failure analysis concludes that the main reason causing early failure of FM inserts is its low hardness, or in the other words, the FM inserts contained too much cobalt. The recipe to make the FM material needs to be changed. The continued binder burn-out experiments showed that … more
Date: April 1, 2003
Creator: Huang, Xiaodi & Gertsch, Richard
Partner: UNT Libraries Government Documents Department
Back to Top of Screen