Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"oxide formation"”.
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Copper Electrode Surfaces: Electrodeposition and Oxide Formation
… The results showed the potential-dependent formation of insoluble and soluble copper oxide species at or near Cu(111) surface.
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Nitric-Oxide Formation in a Hydrocarbon-Air Combustion System
Made available in DSpace on 2014-12-10T22:48:22Z (GMT). No. of bitstreams: 1 7412124.pdf: 4387110 bytes, checksum: b41f7bf378c2b348c36f90ed3f5d7490 (MD5) Previous issue date: 1973
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Nitrogen oxide formation in laminar methane-air diffusion flames.
Thesis. 1975. Sc.D. cn--Massachusetts Institute of Technology. Dept. of Chemical Engineering.
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Nitric oxide formation and thermodynamic modeling in spark ignition engines
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Fuel/air Mixing and Nitrogen Oxide Formation in a Lean Premixed Gas Turbine Combustor
… combustors. The CRM model only requires information regarding the reactor loading, the combustor inlet state, and the combustor geometry. Model improvements were obtained by including the effects of reactant unmixedness based on the fuel/air distribution measurements recorded during the …
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The role of an assist gas during laser-metal interaction
… other thermophysical properties associated with oxide formation during laser-metal interaction.
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Characterization of Aluminum Surfaces: Sorption and Etching
… and smaller-scale storage devices. Fundamental information gained regarding anion interaction with the aluminum surface can be applied to tailor etch processes. Standard electrochemical techniques and SEM are respectively used to etch and analyze the aluminum substrate. Aluminum electrolytic …
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Selective oxidation of aluminum bearing III-V semiconductors with applications to quantum well heterostructure lasers
… to stable, device-quality native oxides. The insulating and low-refractive-index properties of the native oxide prove useful in the fabrication of quantum well heterostructure laser diodes. The rate of oxide formation is sensitive to oxidation temperature and time, crystal doping, …
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Response of chromium and chromium-aluminum coatings on zircaloy-2 to high temperature steam
… steam (HTS) environment, and to provide information regarding its functionality during off-normal transient in light water reactors. Pure Cr coating and CrAl coatings with various compositions were exposed to 700C steam environment for up to 20 hours. Weight gain of coated Zircaloy was …
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Electrode materials for the electrolysis of metal oxides
… at low voltage, consumption of current by metal oxide formation, and ease of surface oxide electro-stripping. Conductivity during electrolytic oxidation is observable as current density maximization at high voltages. While carbon, tungsten, and platinum formed surface oxides, iridium remained …
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Surface Coverage and Structure of Catalytic Monolayers on Au(111) Electrodes
… positive potentials, it delays the onset of gold oxide formation. At extreme negative electrode potentials, the anion desorbs from the surface, confirming activity observed with SPM. Quartz crystal microbalance studies found a mass change smaller than that expected for a full monolayer of …
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Infrared measurements of steady-state temperatures and average surface temperature distributions for silver sliding on sapphire
… the test material because of its resistance to oxide formation. The effects of load, velocity, geometry, and environment on surface temperatures, friction, and wear were investigated for the system of silver sliding on sapphire. Results of this investigation indicate that load, velocity, and …
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A study of the oxygen electrochemistry of ruthenium and iridium
… species were incorporated into the surface oxide film. Changes in the oxidation state of these ruthenium species is probably responsible for the lowering of the oxygen overvoltage. Both the theoretical and practical aspects of the reaction were complicated by the fact that at constant …
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A comparative study of PtCo/C Alloys and Pt/C as cathode catalysts for fuel cell applications
… of potential and temperature on the processes of oxide formation and removal on both Pt/C and PtCo/C catalysts.
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CO₂ Capture with Lithium Oxide in Molten Salt Media : A Case Study of CO₂ Capture via Electrochemically Produced Metal Oxide
… rise originating from anthropogenic carbon dioxide (CO₂) emission intensifies, the development of post-combustion carbon capture technologies has been urged. Although its maturity, conventional thermal swing processes using aqueous amines, suffer from significant limitations, including high …
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Geochemical drivers of Mn removal in drinking water reservoirs under hypolimnetic oxygenation
… (EDS) supports their identification as Mn(IV) oxides (MnOx), which suggests Mn removal driven by oxidation. Elevated alkalinity in high pH solutions promotes Mn oxidation by maintaining high pH through buffering, which sustains conditions favorable for Mn oxidation. Our results also suggest …
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Development of an EQCM-based sensor for metal ions
… OH surface sublattices and subsequent 2-D-phase oxide formation. The inhibition arises from a closed packed layer of nitrate ions at the gold surface, although the layer is disrupted and the inhibition removed by the gold dissolution and reprecipitation processes that occur during potential …
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AN INVESTIGATION OF INELASTIC ELECTRON TUNNELLING SPECTROSCOPY
… the preparation of tunnel junctions, including oxide formation and doping methods. The importance of strict cleaning procedures is stressed, particularly when using liquid phase doping. A new sample holder which is directly immersible into standard liquid helium dewars is described. The …
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Experimental simulation of crevice corrosion of a functionally graded composite system of F91 and Fe-12Cr-2Si exposed to high-temperature lead-bismuth eutectic coolant
… If the metal relies on a passivating layer of oxides for corrosion protection, it may be vulnerable to corrosion attack within the crevice due to a drastically reduced oxygen potential and low pH. Furthermore, in a liquid metal environment, the reducing conditions combined with typically high …
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Kinetics of carbide dissolution in chromium + molybdenum steels during oxidation
… oxidation resistance and a precipitate-free zone formation. Alloy design was carried out using a thermodynamic software Thermo-Calc. Carbides in these alloys were expected to dissolve during oxidation, releasing chromium required for the protective oxide formation. Decarburisation of the matrix …
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