Browsing PhD Dissertations - DO NOT EDIT by Title
Now showing items 12-31 of 82
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Development Of Computational Fluid Dynamics (CFD) Based Erosion Models For Oil And Gas Industry Applications
(Mechanical Engineering, 2013)Erosion prediction plays a critical role in different oil and gas industry segments including drill bit manufacturing, measurement & logging while drilling (M&LWD), and reservoir engineering/completions tools. Recently, ... -
DEVELOPMENT OF PLASMA FUNCTIONALIZED NANO-ADDITIVES FOR OILS AND STUDY OF THEIR TRIBOLOGICAL PROPERTIES
(2017-10-20)Lubricants used in motor engines contain various chemical species to help enhance energy efficiency and provide increased longevity. Unfortunately, at the same time, these additives become a source of catalytic poisoning, ... -
Diffusion-free Back Contact Solar Cells On S-passivated Si(100) Substrates
(Materials Science & Engineering, 2008-04-22)A diffusion-free back contact solar cell is proposed in this work. The textured front-side of this cell is coated with ~100 nm thermal SiO2 to enhance the light trapping meanwhile reduce the surface recombination velocity ... -
The Effects Of Microstructure On The Mechanical Properties Of Hard Transition Metal Silicon Nitride Nanocomposite Coatings
(Materials Science & Engineering, 2014-03-12)In this body of work, the examination of two different transition metal silicon nitride (MeSiN) systems using two different methods of physical vapor deposition (PVD) allowed for the development of a detailed understanding ... -
Electrochemical N-type Doping In Metal Oxides And Its Application In Photovoltaics
(Materials Science & Engineering, 2011-07-14)Electrodeposition has the advantages of low-cost, high-throughput and large-area processing which is particularly suitable for solar cells fabrication. Two common metal oxides prepared by electrodeposition are discussed ... -
ELECTROMIGRATION INDUCED INTERFACE REACTION IN Cu-WIRE / Al-PAD DIFFUSION COUPLE
(2017-01-17)This dissertation presents experimental observations that may assist the understanding of electromigration (EM) failure mechanism active in Cu wire and Al thin film pad (wire bond). This study is motivated by an ongoing ... -
Experimental And Numerical Study Of Phase Transition Of LiFePO₄ Material In Lithium Ion Batteries
(Materials Science & Engineering, 2014-07-14)Phase transition behavior of LiFePO4 material has been studied in this work. During electrochemical charge/discharge processes, LiFePO4 transforms into FePO4 and this electrochemically driven phase transition of the two-phase ... -
Fabrication And Characterization Of Single Electron Device And Study Of Energy Filtering In Single Electron Transport
(Materials Science & Engineering, 2014-03-12)Single electron devices, in which transport of single electrons is precisely controlled, hold a great promise as important components of future electronic devices and sensors. However, technical challenges have prevented ... -
Fabrication Of FePt Ferromagnetic Nanoparticles
(Materials Science & Engineering, 2008-08-08)Fabrication of chemically disordered FePt particles ranging from 2 - 9 nm with a precision of 1 nm has been achieved through modification of key process variables including surfactant concentration, heating rates and the ... -
First-principles Studies On N-type And P-type Doping In Cuprous Oxide
(Materials Science & Engineering, 2012)We have performed studies on n-type and p-type cuprous oxide with and without doping by first principles methods. Generalized Gradient Approximation (GGA) is used for the geometry optimization. The total energy and the ... -
Fundamental Understanding Of Soot Induced Wear Mechanism Of Diesel Engines
(Materials Science & Engineering, 2014-09-17)Emission of Oxides of nitrogen and particulates matters from diesel engines have been reduced by implementing exhaust gas recirculation (EGR) protocols but at the expense of increased wear of engine components. This ... -
GOLD-NANOPARTICLE-BASED THERANOSTIC AGENTS FOR RADIOTHERAPY OF MALIGNANT SOLID TUMORS
(2016-09-15)Radiation therapy is one of the three major methods of cancer treatment. The fundamental goal of radiotherapy is to deliver high radiation doses to targets while simultaneously minimizing doses to critical structures and ... -
Grain Structure Evolution Of Tin-based Lead-free Solder Joints In Electronic Packaging Assembly And Its Impact On The Fatigue Reliability
(Materials Science & Engineering, 2014-03-12)Solder is one of the main joints materials used in the electronics for decades of years. It is not only the mechanical support but also conducts the electric signals in the electronics. However, the regulation of lead ... -
Growth Mechanism And Interface Effects On Microstructure Of Perovskite-type Barium Titanate-based Epitaxial Films
(Materials Science & Engineering, 2012-07-25)This work was motivated and focused on the growth mechanism, microstructures and interfaces of barium titanate, BaTiO₃ (BTO), based epitaxial thin films. Transimission electron microscopy (TEM), high resolution TEM (HRTEM), ... -
GUANIDINIUM BASED ANION EXCHANGE MEMBRANES FOR SOLID POLYMER ALKALINE FUEL CELL APPLICATIONS
(2015-12-09)Low temperature traditional PEM Fuel Cells and also other fuel cells in general suffer from the acute yet long standing issues of cost and performance. This has severely hindered the commercialization of fuel cells but ... -
Hierarchical microstructures to overcome the conflict between strength and toughness of hard coatings: TiN/Ni as a model system
(2022-07-13)In the recent times, industry's production speed has been increasing and thus, the production of parts needs to adapt and so do the materials used to manufacture them. Hence, tools exposed to more extreme conditions using ... -
An Innovative Epitaxial Growth Method For Minimizing Dislocations In Thin-film Quantum-dot Optoelectronic And Photovoltaic Device Applications
(Materials Science & Engineering, 2012-07-25)A new buffer layer method for epitaxial growth of lattice-mismatched semiconductor quantum-dots based p-i-n structures is presented. To our knowledge this is the first instance of a dislocation-reduction approach that ... -
INVESTIGATION OF HIGH-TEMPERATURE OXIDATION RESISTANCE MECHANISM OF CERAMIC COATINGS VIA MICROSTRUCTURE ANALYSIS
(2020-09-03)Recent developments of ceramic coatings deposited using magnetron reactive sputtering show that these films exhibited superior high-temperature oxidation resistance along with other desirable properties such as high hardness, ... -
Investigation of Microstructure Effects on Hardness and Oxidation Resistance of New Generation Ceramic Coatings
(2017-08-16)This work was motivated by the demand for a new generation of materials capable for harsh environment applications, and focused on developing a better understanding of the effects of elemental composition and microstructure ... -
INVESTIGATION OF THE PLASMA ELECTROLYTIC OXIDATION MECHANISM OF TITANIUM
Plasma electrolytic oxidation (PEO) is an environmentally friendly technology capable of forming coatings with excellent adhesion strength at high deposition rates. The PEO process is particularly attractive for forming ...