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.
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Showing 1 to 20 of 113 for “"surface treatments"”.
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Performance of Concrete Bridge Deck Surface Treatments
… of this research was to identify the types of surface treatments available for use on concrete bridge decks and to determine which materials are most capable of providing long-term protection from contamination by chloride ions. The products addressed in this report primarily include urethanes, …
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Electrochemical surface treatments for resorbable and permanent biomedical implants
L'abstract è presente nell'allegato / the abstract is in the attachment
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Carbon fiber surface treatments for improved adhesion to thermoplastic polymers
… in NaOH, H₂SO₄, and amine salts on the surface chemistry of carbon fibers was examined by x-ray photoelectron spectroscopy (XPS). The surfaces of carbon fibers after anodization in NaOH and H₂SO₄ were examined by scanning transmission electron microscopy (STEM). angular dependent XPS, …
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Pressure Shielding Mechanisms in Bio-Inspired Unidirectional Canopy Surface Treatments
Reduction of surface pressure fluctuations is desirable in various aerodynamic and hydrodynamic applications. Over the past few years, studies on canopy surface treatments have been conducted to investigate the fundamental mechanisms of surface pressure attenuation termed as pressure shielding. …
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Passive and Active Thermography for surface treatments characterization in spur gears
L'abstract è presente nell'allegato / the abstract is in the attachment
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Surface Treatments for RC Structures in Marine Environments: A Literature Review
… to be long- lasting, without the added use of surface treatment systems, especially in non-patch-repaired locations. Reinforcement corrosion in marine environments affects the durability of structures due to the high presence of chlorides and moisture availability. The chloride ions in seawater …
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Evaluation of surface treatments for RC structures failing to meet South African durability index requirements
… needs to be established. The potential for using surface treatments to prevent the ingress of corrosion causing agents (carbon dioxide, chloride ions and moisture) is presented in literature but the extent of protection and durability of these products is largely unknown. A laboratory …
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Numerical and experimental evaluation of the erodibility of particle packings with surface treatments and spring reinforcements using the discrete element method
… particle packings subjected to added mass surface treatments was explored using a combination of physical flume experiments and the discrete element method (DEM). Packings composed of spherical glass particles, with and without surface treatments and angled at two different slopes, were …
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Characterizing the chemistry of yellow-poplar surfaces exposed to different surface energy environments using DCA, DSC, and XPS
Surface energy changes in extracted and unextracted yellow-poplar upon exposure to aluminum, teflon, and heat/air surface treatments have been described using dynamic contact angle (DCA) and X-ray photoelectron spectroscopy (XPS) analysis. Results show that the surface molecular orientation of …
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Moisture diffusion through vinyl ester/clay nanocomposites
… clay; two different kinds of clay surface treatments were employed to make the clay compatible with the vinyl ester resin. These nanocomposites were characterized using differential scanning calorimetry (DSC), mechanical property measurements, x-ray diffraction (XRD) and …
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Measurement and control of particulate emissions from cattle feedlots in Kansas
… (3) evaluate the relative effectiveness of pen surface treatments in reducing PM10 emissions, and (4) predict PM control efficiency of vegetative barriers. Concentrations of PM with equivalent aerodynamic diameter of 2.5 µm or less (PM2.5), PM10, and total suspended particulates (TSP) upwind and …
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Threshold voltage in pentacene field effect transistors with parylene dielectric
… dielectric, (2) possible improvement of OFETs by surface treatments, and (3) the effects of interface traps on threshold voltage and parasitic bulk conductivity. Parylene was found to provide a favorable, hydrophobic interface for pentacene growth, yielding transistors with mobilities > 0.5cm²/Vs …
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Effect of Initial Surface Treatment Timing on Chloride Concentrations in Concrete Bridge Decks
… regions frequently specify the application of surface treatments on concrete bridge decks as barriers against chloride ingress. In consideration of concrete cover thickness and the presence of stay-in-place metal forms (SIPMFs), the objective of this research was to determine the latest timing …
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Effects of silica nanoparticle surface treatment and average diameter on the physical and mechanical properties of poly(dimethylsiloxane)-silica nanocomposites
… to quantify the effects of silica nanoparticle surface treatments and average silica nanoparticle diameter on various macroscopic properties of poly(dimethylsiloxane)-silica nanocomposites, specifically stiffness, wettability, and permeability to organic solvents. Poly(dimethylsiloxane)-silica …
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Próteses odontológicas associadas a Nanopartículas de Prata biogênicas: caracterização e atividade antimicrobiana
… to make PMMA antimicrobial. Biogenic AgNPs as a surface treatment for acrylic resin is one of the disruptive and innovative ways to make a prosthesis antimicrobial. Objective: the present study carried out the characterization, antimicrobial activity, durability determination, and roughness …
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Surface and interface characterisation of high-k dielectric materials on silicon and III-V semiconductor substrates
… dielectric oxide materials and semiconductor surfaces is of critical importance to the development of the next generation of high speed semiconductor devices. This thesis investigates the deposition and characterisation of a range of candidate high-k materials on both silicon and III-V (InGaAs …
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Solar thermal collector system modeling and testing for novel solar cooker
… on glazing, Fresnel lenses, and absorber surface treatments to identify and evaluate elements for use in the collection system. Borosilicate glass, with a thermal conductivity of 1.005 W/mK and a solar transmittance of 0.91, and flat black paint, with absorptivity 0.96 and emissivity 0.88 …
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Three dimensional surface texture analysis for characterisation of enamel erosion
3D surface texture parameters have yet to be applied to dental erosion of human enamel. This project aimed to investigate the effect of acid-mediated erosive enamel wear on the micro-texture of polished (Group 1) and unpolished (Group 2) human enamel in vitro. 20 polished and 20 unpolished enamel …
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CHARGE TRANSPORT IN ORGANIC AND HYBRID PEROVSKITE FIELD EFFECT TRANSISTORS
… device architectures, in combination with surface treatments, we were able to achieve mobilities as high as 6.8 cm2/Vs. We find that the microstrain induced in the organic semiconductor layer by the mismatch in the thermal expansion between the consecutive device layers generates trapping …
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