Browsing Dissertations & Theses by Issue Date
Now showing items 1-20 of 192
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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, ... -
Wear and Tribofilm Formation With Zinc-free Antiwear Additives
(Materials Science & Engineering, 12-10-2012)Engine oil is used in all internal combustion engines to lubricate the moving parts & mitigate the wear due to friction. Along with the mentioned two functions, engine oil also serves to protect the engine from corrosion, ... -
Effect Of Additive Morphology & Chemistry On Wear & Friction Of Greases Under Spectrum Loading
(Materials Science & Engineering, 12-10-2012)The primary focus of grease development is to minimize friction and improve on wear and load bearing capacity. Traditional method to evaluate wear behavior of grease is based on ASTM D2266 which evaluates the performance ... -
Self-assembly Of Nanoparticles In Photonic Crystal Cavities For Optoelectronic Devices
(Materials Science & Engineering, 2007-08-23)Photonic crystals (PhC) offer many advantages in optoelectronics field. The focus of this thesis is to investigate a self assembly process for the formation of thin film based one-dimensional PhC and the integration of ... -
Micromechanical Analysis Of Yielding For Particulate Filled Composites
(Materials Science & Engineering, 2007-08-23)Particulate filled composites are hybrid materials which consist of particulates held together by a matrix. In this thesis, a simulation method to obtain overall failure criterion for particulate filled composites based ... -
Interactions Between Antiwear Agent And Novel Additive In Engine Oils
(Materials Science & Engineering, 2007-08-23)Research has shown that side/end products of phosphorus and sulfur compounds in engine oils reduce effective life of exhaust catalysts of automobiles resulting in harmful emissions. Thus environmental regulations have been ... -
Interlaminar Fracture Of Unidirectional Reinforced Composites With Toughnened Resin Systems
(Materials Science & Engineering, 2007-08-23)Several undisclosed fiberglass and carbon fiber laminates with toughened resin systems were tested and examined. Experiments were conducted to determine Modes I and II interlaminar fracture toughness for each of the nine ... -
Preparation And Characterization Of Doped Zinc Oxide
(Materials Science & Engineering, 2007-08-23)Cathodic electrodeposition was used to prepare thin films of ZnO doped with Cd, from oxygenated KCl electrolyte containing ZnCl2 and CdCl2 in various molar ratios ranging from 0 mM to 5.0 mM each. Evidence for doping was ... -
Piezoelectric Analysis For Hetrogeneous Medium
(Materials Science & Engineering, 2007-08-23)In the recent years, several types of piezocomposites have been fabricated since they have provided material properties superior to conventional piezoelectric materials. In order to design these composites, it is essential ... -
Synthesis And Characterization Of Multifunctional Oxides For Force And Gas Sensors
(Materials Science & Engineering, 2007-08-23)In this research work, the piezoresistivity phenomena in multifunctional oxides of La0.8Sr0.2MnO3 (LSMO) and composites of LSMO - (Ce0.12Zr0.88)O2 has been investigated for force and gas sensor applications in harsh ... -
Piezoelectric Micropump For Drug Delivery Application
(Materials Science & Engineering, 2007-08-23)Bending type actuators providing high displacement (~1mm) with low blocking force (~0.5N) and the stack actuators providing low displacement (~1m) with high blocking force (~1kN) represent the extreme ends of ... -
Investigation On The Mechanism Of Interface Electromigration (EM) In Copper (Cu) Thin Films
(Materials Science & Engineering, 2007-08-23)This study concerns the mechanism of the interface electromigration (EM) in copper (Cu) thin films. While EM in Cu is one of the most concerned reliability failure phenomena in Cu interconnects used microelectronic devices, ... -
Surface Modification Of 6H-SiC Under Vacuum Annealing Studied By Time Of Flight Positron Annihilation Induced Auger Electron Spectroscopy
(Materials Science & Engineering, 2007-08-23)This thesis presents the first study of vacuum annealing of 6H- SiC surface using Time-of-Flight-Positron Annihilation induced Auger Electron Spectroscopy(TOF-PAES) . The study was the first application of a TOF-PAES ... -
Experimental Study Of Laminated Composite Tubes Under Bending
(Materials Science & Engineering, 2007-08-23)Bending stiffness of laminated composite tubes was determined experimentally using four-point bending test. The experimental results were compared with the results obtained by the laminated plate and smear property approaches. ... -
Cathodic Electrodeposition Of Cadmium Oxide, Zinc Oxide And Mixed Cadmium Oxide-Zinc Oxide Thin Films
(Materials Science & Engineering, 2007-08-23)Cadmium oxide (CdO) and (CdO)x(ZnO)1-x mixed semiconductor films were cathodically electrodeposited for the first time on F-doped SnO2 substrates. The CdO thin films were deposited from an aqueous 0.1 M KCl medium containing ... -
Thermal Failure Mechanism And Voltammetry Metrology For Cu/barrier/low K Integration
(Materials Science & Engineering, 2007-08-23)The present study investigates the thermal stability of Cu/barrier/porous low κ (PLK) integration first, and then a new characterization method based on voltammetry is developed to characterize quality of diffusion ... -
DNA Based Thin Film As Hole Transport Layer In Bulk Heterojunction Polymer Solar Cells
(Materials Science & Engineering, 2007-09-17)In the field of organic solar cell, the conjugated polymer-fullerene bulk heterojunction concept is one of the ongoing research interests. In this work, the use of de-oxyribose nucleic acid/ hexadecyl trimethyl ammonium ... -
Synthesis And Characterization Of Polythiophene Derivatives
(Materials Science & Engineering, 2007-10-08)In Chapter 1, the history of conducting polymers, especially polythiophene and its derivatives, was briefly reviewed. Different approaches of structural modifications to afford small bandgap polythiophene derivatives were ... -
Synthesis, Structure And Characterization Of Silver Doped Diamond Like Carbon Thin Films
(Materials Science & Engineering, 2008-04-22)Diamond like carbon (DLC) films have gained grounds in the biomedical field as an inert, biocompatible, low friction and wear resistant coating and are widely used in heart valves, coronary artery stents, dental implants, ... -
Thermally Activated Sulfurization Scheme for CuInS2 Solar Cells
(Materials Science & Engineering, 2008-04-22)Chalcopyrite Solar Cells are now being fabricated on flexible (polymer) substrates. However, CuInS2 solar cells have not been fabricated on the polymer substrates on the commercial scale due the sulfurization temperature ...