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Showing 1 to 20 of 32 for “"copper-silver"”.
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Ternary diffusion in copper-silver-gold alloys.
Massachusetts Institute of Technology. Dept. of Metallurgy. Thesis. 1965. Ph.D.
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Nanostructured Copper-Silver Alloys Synthesized by High Energy Ball Milling
The synthesized nanostructured alloys also display high hardness values, in the range of 4--6 Gpa. The hardness increases as milling temperature increase, as a result of phase separation and dynamic recrystallization.
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Interstitial-impurity interactions in copper-silver and aluminum-magnesium alloys
… impurities in electron-irradiated aluminum and copper. Measurements were taken of the ultrasonic attenuation (at 10 and 30 MHz) and resonant frequency (at 10 MHz) in single crystal sample s of Cu-Ag and AI-Mg. A variety of peaks appeared in both materials in plots of the logarithmic decrement …
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Irradiation Effects in Copper, Silver, and Gold Near 10 Degrees K
Made available in DSpace on 2015-05-12T17:11:49Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0009059.PDF: 1203742 bytes, checksum: fb890851570f659516118512ce6b3d35 (MD5) Previous issue date: 1954
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Physical and optoelectronic properties of copper silver indium diselenide thin films
Increasing global energy consumption together with environmental concerns has led to much interest in alternative, cleaner sources of energy such as solar photovoltaic. Researchers in the solar cell community have been looking for ways to reduce costs while maintaining or increasing already high …
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An investigation of the mechanical and physical properties of copper-silver alloys and the use of these alloys in Pre-Columbian America
… Andean zone of South America and in Mesoamerica, copper-silver alloys were important in the production of thin, silver-colored sheet metal artifacts. This thesis examines the mechanical and physical properties of the copper-silver alloy system that are important to understanding why copper-silver …
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In Situ Vibrational Spectroscopic and Electrochemical Study of Electrodeposition Additives on Copper Surfaces
… of silicotungstate, alpha-SiW 12O404-, on copper, silver, and gold electrode surfaces was investigated using SERS and PM-IRRAS. The results show that silicotungstate interacts with Cu surfaces. This interaction is shown to be potential-dependent; alpha-SiW12O404- associates with the Cu …
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Electrochemical Investigation of Thin Nickel, Copper and Silver Films Interfaced with Yttria-Stabilized Zirconia
The electrochemical investigation of nickel, copper and silver thin films interfaced with yttria stabilized zirconia (YSZ) solid electrolyte was accomplished to determine their response to polarization in dilute oxygen environments at 350 °C and assess their viability for electrochemical promotion …
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Dispersion of Dissolved Metals From the Webster County, Missouri Sanitary Landfill
… atomic absorption techniques for cadmium, copper, lead, silver, and zinc to determine if these elements were present in soils. High levels of cyanide and other compounds were found to exist in surface waters and elevated levels of copper, silver, and zinc were detected in stream sediments. …
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Three pion production on complex nuclei at 23 GeV/c
… is one of the nuclear targets: carbon, aluminum, copper, silver, or lead. Total and differential cross-sections are quoted, and the method of their computation is outlined. The spin-parity composition of the three-pion system has been analyzed using the Illinois method of partial wave analysis. …
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Synthetic and catalytic studies of Group 11 N-heterocyclic carbene complexes
… monomeric, terminal fluoride complexes of copper, silver and gold, the last representing the first isolable gold(I) fluoride. These complexes were shown to be reactive synthons for new metal complexes. The ability of the NHC ligand to support unusual coordination environments for these …
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A study of the supercooling behavior of high purity liquid bismuth
… tellurium, selenium, indium, cadmium, lead, copper, silver and gold.</p> <p>A drastic reduction in supercooling resulted by the addition of small concentrations (less than about 10 ppm) of antimony and tellurium whereas the other elements had a moderate to slight effect. Since all of these …
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Non-silicon Microfabricated Nanostructured Chemical Sensors For Electric Nose Application
… applications. Different doping material such as copper, silver, platinum and indium are studied in order to achieve better selectivity for different targeting toxic gases including hydrogen, carbon monoxide, hydrogen sulfide etc. Fundamental issues like sensitivity, selectivity, stability, …
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Multienergetic External-beam PIXE as a Means of Stydying the Surface Enrichment Effect in Coins
… The modern coin data suggested depletion in copper in copper-silver and copper-gold alloys, which is consistent with predictions of the theory of the surface enrichment effect. We suggest that the ancient coins are so deeply corroded that the PIXE beam is unable to penetrate adequately to …
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The monitoring and control of specialist ceramic kiln atmospheres and emissions.
… glazes containing reducible metal oxides such as copper, silver and bismuth are subjected to a reducing atmosphere which results in the formation of stable iridescent lustrous colour effects. Conventionally hydrocarbons are used to produce a reducing atmosphere, the combustion of which can lead to …
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Monte Carlo Simulations of Electron Transport in 3D Solids and Molecular Dynamics Simulations of the Mechanics of 2D materials
… test was realized by considering three metals (copper, silver and gold) as tar- get materials. Further studies were carried out on these materials by calculating secondary electron emission yields as a function of the electron beam energy. A remarkable good agreement with experimental data was …
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An investigation into the effects of shape and structure on the antibacterial efficacy of metal nanoparticles
… agents. Metal nanoparticles (NPs) such as silver (AgNPs), copper (CuNPs) and gold (AuNPs) exhibit antimicrobial properties against bacteria, including Escherichia coli and Enterococcus faecium. E. coli O157:H7, which is known to be virulent and infectious, causing bowel discomfort, …
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Technology, science, and environtmental impact of a novel Cu-Ag core-shell solderless interconnect system
… the low-temperature (200°C) sintering of copper-silver core-shell particles as a viable solderless interconnect technology. This technology is based on the silver atoms from the shell diffusing by surface diffusion to form sintered necks between copper particles, and therefore dewetting …
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Proteomic and genomic characterization of the influence of copper on Legionella pneumophila and the drinking water microbiome
… understand this unique and important organism. Copper is a natural antimicrobial that can be present in drinking water due to passive release from copper pipes or intentionally dosed (e.g., copper-silver ionization systems) for microbial control. However, some L. pneumophila strains have …
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The aerobic, water-assisted selective oxidation of methane over platinum-based catalysts
… using hydrogen peroxide)[6, 7] and the use of copper-exchanged zeolites which enable the catalytic conversion of methane with high methanol selectivities [8-10]. Copper-exchanged zeolites require feeding an excess of methane and still suffer from low methane conversions. The study presented in …
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