A5034743712- Glass properties and applications
- Physics of Superconductivity and Magnetism
- Radioactive element chemistry and processing
- Nuclear materials and radiation effects
- Recycling and utilization of industrial and municipal waste in materials production
- Graphite, nuclear technology, radiation studies
- Chemical Synthesis and Characterization
- Superconducting Materials and Applications
- Luminescence Properties of Advanced Materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Groundwater flow and contamination studies
- Concrete and Cement Materials Research
- Advanced Condensed Matter Physics
- Building materials and conservation
- Corrosion Behavior and Inhibition
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Natural Fiber Reinforced Composites
- Nuclear and radioactivity studies
- Mechanical Behavior of Composites
- Extraction and Separation Processes
- Environmental remediation with nanomaterials
- Thermal and Kinetic Analysis
- Fiber-reinforced polymer composites
- Geological and Geochemical Analysis
Catholic University of America
2012-2024
University of America
2002-2022
University of Technology
1996
Westinghouse Electric (United States)
1987
Purdue University West Lafayette
1975-1981
American Ceramic Society
1981
Deen Dayal Upadhyaya Gorakhpur University
1979
Hebrew University of Jerusalem
1972
Technical literature on the subject of environmental exposure effects related to determining accelerated test methods for prediction long-term performance FRP composite materials highway structural applications is reviewed in this paper. Effects a chemical and thermal nature fiberreinforced polymer (FRP) composites are considered. Such exposures include temperature, moisture chemicals liquid solutions or gaseous mixtures. The changes physical mechanical properties materials. typically...
The question of relaxation time distributions in viscous liquids is examined by observing time-dependent behavior optically active elements the liquid structure, both intrinsic and otherwise, response to perturbations from equilibrium states. As a suitable medium for this study polyalcohol sorbitol C6H8(OH)6 adopted. Equilibrium intact broken hydrogen bonds pure have been determined using near IR spectra, loss of, re-establishment equilibrium, during down up temperature ramping processes,...
A potential candidate material for the construction of Mars habitats is concrete made from Martian regolith and sulfur extracted itself. Sulfur concrete, which has excellent mechanical properties, can be prepared at a low temperature (<150 °) without water (unlike Portland-cement concrete). The surface much higher concentration than those Earth, Moon, or asteroids. on Mars, however, exists not as elemental sulfur—which needed in production—but sulfates (usually hydrated) sulfides. This...
Research on fiber-reinforced plastic composites has explored the effects of selected aqueous environments mechanical and physical properties these composites. The composite materials tested were produced using pultrusion process. Resins included in study polyester vinylester. Fibers E-glass, carbon, aramid. Environments considered air, deionized water, acetic acid at two concentrations, ammonia concentrations. Temperatures room temperature, 50 80°C. Mechanical testing tension, flexure, short...
Measurements of levitation forces on melt-quenched and free sintered YBa 2 Cu 3 O x superconductors show that samples produce from 96-170% higher than specimens. The force increases are correlated with magnetization values for the material. Similar in magnetic stiffness were also measured. Vertical relaxation showed less 5% decrease one hour. These results have important favorable implications application to superconducting bearings.
The mechanisms that control the release of components nuclear waste glasses into aqueous environments and rates such depend to a large extent on contact time between glass particular volume water. At short times leach products does not significantly affect reactivity water toward glass, while at long times, as those expected in repository environments, saturation medium formation new solid phases are very important. development methodology based analysis flow test data identify controlling...
The effect of the presence moderate gamma doses (6×104 Gy) on leaching glassy and ceramic waste forms has been investigated. It is found that leach rates are enhanced by <50% in case alumina-free glasses, a factor 3 to 4 glasses contain 5 8% Al2O3, 20 100 SYNROC-D (20% A32O3). Buffer studies show enhancement be almost entirely due decrease pH, composition dependence interpreted terms sharp rise both alumina solubility alumina-containing materials with increasing acidity. radiation-induced pH...
The effects on durability of composition variations in West Valley Nuclear Services Company preliminary waste glass WV205 are discussed. MCC-3 results at times from 7 to 180 days presented for 50 compositions. suggestive a large plateau region where is good and weakly dependent composition, adjoining which much steeper function composition. same effect observed when the redox state iron, comprises ∼12 wt% glass, varied. general trends discussed terms structural roles components. alkalies...
Leach studies carried out on barium-yttrium-copper oxides in water and 0.05 M KI have shown the selective occurrence of two processes, vic. leaching barium loss excess oxygen, e.g. through oxidation iodide. The extent these processes during early stages is much larger case open structures, tetragonal phase. Accordingly, aqueous media provides a sensitive convenient method structural characterization.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of structural probe ions for relaxation studies in glasses. I. Spectroscopic properties cobalt(II) chloride-doped potassium nitrate-calcium nitrate glassesA. Barkatt and C. A. AngellCite this: J. Phys. Chem. 1975, 79, 20, 2192–2197Publication Date (Print):September 1, 1975Publication History Published online1 May 2002Published inissue 1 September...
In order to test the effectiveness of oxalate-based polymeric adsorbents in recovery uranium from seawater, diallyl oxalate (DAOx) was grafted onto nylon 6 fabrics by exposing fabric, immersed pure liquid DAOx or a surfactant-stabilized dispersion water, electron beam gamma radiation. Following drying and weighing determine degree grafting (DoG), presence verified using XPS. Zeta potential measurements showed fabric surfaces be negatively charged. The were tested rotating them for 7 days...