Index Catalog // ScholarsArchive@OSU

Platinum Nanoparticles in Transition Alumina: An Atomic Resolution Study of Interfaces

Creator:: Clauser, Arielle L.
Abstract:: The phases of transition alumina are scientifically interesting due to their high specific surface area, favorable acid/ base characteristics, and chemical and hydrothermal stability which make this metallic oxide a prime candidate for use as a support for metallic nanoparticles (NPs) in heterocatalysis. Interactions at alumina/Pt interfaces are important for...
Resource Type:: Dissertation
Full Text:: approved: ______________________________________________________ Melissa K. Santala The phases

In-Situ Confocal Scanning Laser Microscopy and Post-Exposure Analysis of a Cu/Fe-based Oxygen Carrier Material in High-Temperature Oxidation and Reduction Environments for Chemical Looping Combustion Applications

Creator:: Nealley, W. H. Harrison
Abstract:: A Cu/Fe-spinel-based oxygen carrier designed at the National Energy Technology Laboratory was studied in order to characterize its physical and chemical behavior with cyclic oxidation and reduction treatments at 800°C for applications in chemical looping combustions. Observations were made on individual particles of the oxygen carrier in-situ using a confocal...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Melissa K. Santala A Cu/Fe-spinel-based oxygen carrier designed at the National

Characterization of Low Temperature Crystallization Growth Parameters of the Growth-dominated Phase Change Materials: Ge1Sb6Te1 and Ga15Sb85 by Optical Microscopy

Creator:: Winseck, Mark M.
Abstract:: Phase change memory materials are a set of chalcogenide or pnictogenide materials systems currently being researched for use in optical and resistive based memory systems due to their large change in optoelectronic properties between the amorphous and the crystalline states. For these materials systems to be considered as a suitable...
Resource Type:: Masters Thesis
Full Text:: : Melissa K. Santala Phase change memory materials are a set of chalcogenide or pnictogenide materials

Crystallization Rates of AIST and Ge Thin Films by Optical and Electron Microscopy

Creator:: Bird, Victoriea L.
Abstract:: The amorphous to crystalline phase change is of great interest for the production and operation of phase change memory and germanium electronic devices. Phase change memory relies on the ability to differentiate between differences in optical or electrical properties between the amorphous and crystalline phases of a single material. Amorphous...
Resource Type:: Masters Thesis
Full Text:: Microscopy Abstract approved: ______________________________________________________ Melissa K

Transient electric birefringence for the characterization of cellulose nanocrystals and tobacco mosaic virus

Creator:: Taylor, Melissa J.
Abstract:: The development of a transient electric birefringence (TEB) apparatus for macroparticle characterization is herein discussed. The experimental difficulties encountered were related largely to poor data resolution. Misalignment and strain birefringence in optical components further complicated results. Improved data digitization methods were developed, and precise mathematical models were derived in order...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Melissa J. Taylor for the

Role of Stoichiometry on Ordering in Ni-Cr Alloys

Creator:: Teng, Fei
Abstract:: Mechanical property degradation due to isothermal ageing is of potential concern for alloys based on the Ni-Cr binary system (e.g., Inconel 690, 625), particularly in nuclear power applications where component lifetimes can exceed 40 years. In the present research, the disorder-order phase transformation, which is the primary mechanism of ageing,...
Resource Type:: Masters Thesis
Full Text:: appreciation to Dr. Melissa Santala for giving great help on getting darkfield image and performing duel-beam

Development of Temperature-Stable Relaxor Dielectrics for High Energy Density Capacitor Applications

Creator:: McCue, Connor
Abstract:: High performance dielectric materials are needed for high power SiC- or GaN-based electronics which combine the best features of high energy density, low dielectric loss and high reliability and for advanced high-speed and high-voltage energy storage where temperature stability plays an important role in material properties. An ideal capacitor for...
Resource Type:: Masters Thesis
Full Text:: . The Farad is defined as: 𝐶 = 𝑞 𝑉 where q is the internal charge stored and V is the voltage

Characterization and Development of Ni-based Superalloys for Supercritical Carbon Dioxide Applications

Creator:: Adam, Benjamin M.
Abstract:: The advent of supercritical CO2 as a new heat-exchange medium has seen strong interest from the power industry and the energy research field recently. It is advan- tageous in comparison with other heat-exchange cycles, as it can be operated safely at much higher temperatures and pressures, thus increasing the thermal...
Resource Type:: Dissertation
Full Text:: troubleshoot and to provide valuable suggestions. Thanks also to my committee members, Dr. Melissa Santala and

Investigation of Thermal Degradation in Structural Alloys for Nuclear Power Systems

Creator:: Teng, Fei
Abstract:: The thermal degradation of structural materials is considered to be a key factor for evaluating the lifetime of current nuclear power plants. Ni-based and Fe-based alloys, such as 690, 625, 304, and 316, are widely used in nuclear industry as structural components due to the extraordinary corrosion resistance and mechanical...
Resource Type:: Dissertation
Full Text:: parameters: k0 = 3.00E+05 h -1, Q = 120 kJ, n = 0.75. .... 38 Figure 3-1. Schematics of ordered MoPt2

Chemical Solution Deposition and Advanced Characterization of Pb-free, Bi-based, Piezoelectric Thin Films

Creator:: Mason, Ashley D.
Abstract:: Piezoelectric materials convert mechanical strain into a dielectric displacement, as well as the converse, allowing these materials to be used as sensors, actuators, and transducers. Currently, lead zirconate titanate (PZT) is the primary material used in these applications. Due to environmental toxicity and safety concerns associated with Pb, development of...
Resource Type:: Dissertation
Full Text:: of stored charge, Q, over the applied voltage, V, for a material between two conducting electrodes

ScholarsArchive@OSU

Platinum Nanoparticles in Transition Alumina: An Atomic Resolution Study of Interfaces

In-Situ Confocal Scanning Laser Microscopy and Post-Exposure Analysis of a Cu/Fe-based Oxygen Carrier Material in High-Temperature Oxidation and Reduction Environments for Chemical Looping Combustion Applications

Characterization of Low Temperature Crystallization Growth Parameters of the Growth-dominated Phase Change Materials: Ge1Sb6Te1 and Ga15Sb85 by Optical Microscopy

Crystallization Rates of AIST and Ge Thin Films by Optical and Electron Microscopy

Transient electric birefringence for the characterization of cellulose nanocrystals and tobacco mosaic virus

Role of Stoichiometry on Ordering in Ni-Cr Alloys

Development of Temperature-Stable Relaxor Dielectrics for High Energy Density Capacitor Applications

Characterization and Development of Ni-based Superalloys for Supercritical Carbon Dioxide Applications

Investigation of Thermal Degradation in Structural Alloys for Nuclear Power Systems

Chemical Solution Deposition and Advanced Characterization of Pb-free, Bi-based, Piezoelectric Thin Films

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