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Showing 1 to 20 of 350 for “"vanadium"”.
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Deformation of Vanadium Containing Dispersed Vanadium(16)nitrogen Particles
Made available in DSpace on 2014-12-14T16:00:29Z (GMT). No. of bitstreams: 1 7606953.pdf: 7172404 bytes, checksum: 6568d47abb73f1d2309a23e86ba7cede (MD5) Previous issue date: 1975
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Thermodynamics of Oxygen in Solid Solution in Vanadium and Niobium-Vanadium Alloys
Made available in DSpace on 2014-12-14T16:00:37Z (GMT). No. of bitstreams: 1 7811297.pdf: 4701484 bytes, checksum: b38112927e4655d22e319b9eb5adc8a6 (MD5) Previous issue date: 1978
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Geochemistry of vanadium in an epigenetic sandstone-hosted vanadium-uranium deposit, Henry Basin, Utah
Includes bibliographical references.
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Vanadium interaction with FCC catalysts
… reaction, these catalysts are contaminated with vanadium which has a marked effect on the crystallinity of the zeolite-Y component and, as a consequence, activity and selectivity for hydrocarbon processing is degraded. The purpose of this work has been to carry out a detailed investigation, on …
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The vanadium-zirconium alloy system
<p>This investigation of the vanadium-zirconium alloy system produced evidence on several points concerning the equilibrium diagram. It was shown that a eutectic reaction between an intermediate phase and a zirconium-rich solid solution occurs at a temperature of 1230° +/- 10°C, and that the …
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Oxygen Diffusion in Vanadium-Based Alloys
… and equilibrium properties of oxygen in vanadium-based alloys was made by EMF measurements on solid electrolytic cells over the temperature range of 873-1423(DEGREES)K. The oxygen diffusion in vanadium was not significantly modified by small additions of Ti, Cr, Ni, Nb and Ta. The …
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Grain Boundary Solute Segregation in Vanadium
Vanadium alloys are a candidate structural material in nuclear fusion applications, where the presence of grain boundaries can improve mechanical properties and act as a sink for radiation- induced defects. Solutes with a thermodynamic preference to segregate to grain boundaries can stabilize them, …
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Particulate vanadium in the Cambridge atmosphere.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
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Transformation and precipitation in vanadium treated steels
… steels containing varying amounts of carbon, vanadium and nitrogen was investigated in relation to the solubility of VC and VN in austenite, the grain coarsening characteristics of austenite, the tempering of martensite and other structures, the transformation during continuous cooling, the …
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Vanadium uptake and transport in higher plants
The uptake and transport of vanadium in several higher plant species has been examined. Studies utilizing excised Hordeum roots have revealed the uptake patterns of two different ionic species of vanadium (V02+ and V03) to be similar. Both ionic forms exhibited a large extracellular component in …
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Coordination Number of Vanadium (Plus Three) Complexes
… as to the usual coordination number of vanadium in the plus three oxidation state. According to the literature, the discrepancy is this: Moeller states that the coordination number of vanadium III is four, indicating a complex compound such as KVF4 which upon ionization would yield K+ …
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Catalytic coatings for vanadium-based hydrogen membranes
Vanadium is a cheaper and highly permeable alternative to palladium as a dense metallic hydrogen membrane. However, catalytic surface coatings must be applied to vanadium surfaces to enable the transport of molecular hydrogen. These coatings facilitate dissociation and recombination kinetics of …
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Tunable spin-charge conversion in vanadium dioxide
Spin-based electronic devices rely on the interplay of spin and charge degree of freedom of electrons and are emerging as a promising beyond CMOS technology. Fast, scalable, low energy consumption magnetic memories and nonvolatile spin logic devices have been demonstrated utilizing …
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Interactions of molybdenum and vanadium with iron nanoparticles
Molybdenum, vanadium and iron are important micro and macro nutrients, respectively, for all living organisms. Their cycles and budgets in the natural environment is affected by - and affects many different processes. Poorly ordered ferrihydrite nanoparticles characterised for their particle size …
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Elektrochemische Untersuchungen von Oxidschichten auf Vanadium und Vanadiumlegierungen
Elektroden aus Legierungen der Übergangsmetalle Vanadium, Titan und Niob und der reinen Metalle reagieren in Abhängigkeit von der Zusammensetzung und des mit ihnen im Kontakt stehenden wässrigen Elektrolyten in höchst unterschiedlicher Weise. Für eine systematische Untersuchung der …
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Phase Transition in Vanadium Dioxide Induced by Friction
"Le dioxyde de vanadium (VO₂) est un matériau avec une transition de phase qui se passe vers une température de 68°C. C'est un matériau important qui a fait l'objet de nombreuses études au cours des dernières décennies, et plusieurs applications ont été démontrées en optique. À ce jour, les études …
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Bioinspirierte Vanadium-Komplexe - Synthese, Struktur und katalytische Aktivität
Nachdem Vanadium in verschiedenen Organismen als essentieller Bestandteil unter anderem in Haloperoxidasen nachgewiesen werden konnte, stieg das Interesse an Struktur und Funktion vanadiumabhängiger Enzyme. Wasserstoffbrückenbindungen spielen im aktiven Zentrum eine wichtige Rolle, sowohl bei der …
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Electrodeposited macroporous vanadium oxide Li-ion battery materials
… on the electrodeposition of 3D macroporous vanadium oxide inverse opals and binary inverse opals on transparent conducting oxide substrates and stainless steel and thermally oxidized stainless-steel substrates. The electrodeposition follows a diffusion limited growth mode to form 3D porous …
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