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.
Results
Showing 1 to 13 of 13 for “"Energy of Formation"”.
-
Theory of nucleation of water properties of some clathrate like cluster structures
"The tranquility of classical homogeneous nucleation theory has been disturbed by the introduction of statistical mechanical correction factors to a basically thermodynamic theory. These factors, which appear to be essential, destroy much of the agreement with experiment in the case of water vapor. …
-
Cu2ZnSn(S,Se)4 photovoltaic absorber fabrication by hydride chalcogenization of electrodeposited precursors
… (CIGS) absorber material, CZTSSe consists of more readily-available materials, and may therefore offer cost reduction and highly scalable production potential if its PV properties can be controlled and improved. This work presents a two-step process for fabricating CZTSSe: the metals Cu, …
-
A study of internal oxidation in carburising steels
… can play a major detrimental role in the failure of carburised components such as bearings and gears. Internal oxidation leads to a degradation of the surface layer often leading to surface break up and fatigue. This work is concerned with a detailed understanding of the formation of internal …
-
Developing an elevated temperature Pourbaix diagram for zirconium and multi-element Pourbaix diagram of Zircaloy-4
… For example, the fuel bundles in coolant systems of CANDU™ reactors operate between 533 to 583K (260 to 310 °C). However, thermodynamic and hydrolysis properties of aqueous zirconium species have not been measured above standard conditions. This lack of information is addressed through solubility …
-
Vapor phase clustering model for water
… phenomena are among the most widespread of all naturally occurring phenomena, even the simplest of nucleation processes, homogeneous nucleation, is poorly understood, particularly the homogeneous nucleation of liquid droplets from water vapor. Homogeneous nucleation involves only …
-
Towards inert cores for investment casting
… a consequence, blades in the high pressure part of the turbine are subject to an extremely high level of oxidative attack. These blades are cast from specialized alloys in ceramic moulds which employ internal ceramic cores. One way in which the blades can be made more resistant to corrosion is by …
-
Manganese mineralization hosted by the Rocky Gap Sandstone in Bland County, Virginia
The Stange Mine was one of the largest and most important manganese mines in Virginia . The mineralization is hosted by the Rocky Gap Sandstone of Devonian age. It is a medium to coarse grained sandstone deposited on a shallow marine shelf in a warm water environment. Conodont color indexes …
-
Thermodynamic calculations with TK!Solver
The objective of this research was to apply the TK!Solver program for thermodynamic calculations. The TK!Solver program is equation-solving software that can solve both linear and non-linear sets of equations. To achieve the above objective, six programs have been developed. Program ESTATE.TK …
-
X-ray diffraction study of compressed solid argon and krypton
… lattice parameters along the melting curves of solid argon and solid krypton and to measure changes in vacancy concentrations along quasi-isochores for both these substances. The uncertainty of the lattice parameters obtained along melting was estimated to be 27 ppm. These measurements are …
-
Thermodynamic properties and atomic structure of Ca-based liquid alloys
… metal batteries, the thermodynamic properties of diverse Ca-based liquid alloys were investigated. The thermodynamic properties of Ca-Sb alloys were determined by emf measurements. It was found that Sb as positive electrode would provide the highest voltage for Ca-based liquid metal batteries …
-
The effect of Niobium on the defect chemistry and corrosion kinetics of tetragonal ZrO₂ : a density functional theory study
… [8]. Experimental effort to determine the effect of Nb on corrosion behaviour of these alloys has no clear answer to whether Nb improves or degrades the corrosion resistance[8, 48, 201. Even the charge state of Nb as a defect in zirconia is debated. Experimental findings of Froideval et al [5] …
-
Thermodynamische und kinetische Untersuchungen zur Korrosion von Fe, Ni und Cr, sowie ausgewählten Legierungen bei Gegenwart eines geschmolzenen KCl - ZnCl 2-Eutektikums
In the presence of heavy metal containing chloride melts, metallic materials show a strongly accelerated corrosion. In this work, the influences of the elements Fe, Cr, Ni and Si and the partial pressures of O2 and HCl on the salt melt-induced high temperature corrosion have been studied, as well …
-
Nucleation and Growth of Defects in Nitrogen doped Silicon
… treatment processes through the modification of the early stages of point defect clustering dynamics. In this thesis, the basic interactions of light element impurities, particularly N and O, with point defects and crystal defects in silicon are scrutinized in order to understand the …