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Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark
Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark
Masters Theses
The family of layered carbides and nitrides known as MAX phase ceramics combine many attractive properties of both ceramics and metals due to their nanolaminate crystal structure and are promising potential candidates for application in future nuclear reactors. This thesis reports on the background, design, and analysis of an experiment focused on determining the effects of energetic heavy ion irradiations on polycrystalline samples of titanium silicon carbide 312, titanium aluminum carbide 312, and titanium aluminum carbide 211. The irradiation conditions consisted of ion doses between 10 and 30 displacements per atom at temperatures of 400 and 700 degrees Celsius, conditions …
Computational And Experimental Studies Of Ca12al14o33, Mayenite, Elijah Duncan Barlow
Computational And Experimental Studies Of Ca12al14o33, Mayenite, Elijah Duncan Barlow
Masters Theses
In this study C₁₂Al₁₄O₃₃ [mayenite] is computationally modeled, synthesized, and compared to literature in order to build a knowledge base for the further study of this compound. It is hoped that this study of mayenite will lead to the development of a new transparent conductive oxide that uses earth abundant elements instead of rare earth elements. For this study polycrystalline mayenite was synthesized using traditional solid-state synthesis techniques, and growth of a single crystal was then attempted. The VASP software package was then used to simulate the compound, both physically and electronically. The results of the simulation were then compared …
Disorder In Mg1-Xnixal2o4 Spinel And Its Impact On The Response To Swift Heavy Ion Irradiation, Brandon Alexander Perlov
Disorder In Mg1-Xnixal2o4 Spinel And Its Impact On The Response To Swift Heavy Ion Irradiation, Brandon Alexander Perlov
Masters Theses
Spinels, which are currently used in optical applications, have many proposed functions in the nuclear industry, such as a nuclear waste form due to its radiation resistance. Disordering plays a key role in the response of spinel to a wide range of irradiation conditions. The first part of this research project was on characterizing the type and degree of disorder that can be induced by chemical substitution in the magnesium nickel aluminate spinel solid solution series (Mg(1-x)Ni(x)Al2O4). Neutron total scattering has been used to characterize the structure at both the cation and anion sublattices. High-resolution pair distribution function analysis was …
Impact Of Fuel Rod Coatings On Reactor Performance And Safety, Ian Robert Stewart
Impact Of Fuel Rod Coatings On Reactor Performance And Safety, Ian Robert Stewart
Masters Theses
This study evaluates the use of a ceramic coating on the Zr-alloy cladding within a PWR using four ceramic compounds of 5 and 10 micron thicknesses: ZrO2, TiAlN, Ti2AlC, and Ti3AlC2. The film’s impact is assessed for variation on: reactivity, fuel cycle length, maximum temperature, film’s roughness, and transient conditions. The reactivity is analyzed using the following methods: change in the multiplication factor (k) each film introduces to the system using the ABH method, and Monte Carlo software (MCNP). Both methods are in good agreement, yielding less than half a percent change from a reference, no-film fuel pin. In order …