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 18 of 18 for “"Deposition efficiency"”.
-
DISPERSAL GRADIENTS AND DEPOSITION EFFICIENCY OF VENTURIA INAEQUALIS ASCOSPORES AND THEIR RELATIONSHIP TO LESION DENSITIES (APPLE SCAB DISEASE, SPORE DISPERSAL, TRAPPING)
… figure, there was no relationship.</p><p>The deposition efficiency (percentage of area dose) of ascospores deposited on coverslips affixed to leaves in a glasshouse study was 3.8, 2.5, and 0.8% at wind speeds of 0.23, 0.45, and 0.89 m s('-1), respectively. The low number of lesions recorded in …
-
Advancing Cold Spray for Additive Manufacturing: A Study on Particle Morphology, Gas Nature, and Particle Preheating
… investigation aims to understand and improve the deposition quality and rates of cold spray for additive manufacturing in a way that is economically sound and without the detrimental temperature effects seen in traditional metallic additive manufacturing processes. It focuses on materials that are …
-
An Investigation of Flow-Limited Field-Injection Electrostatic Spraying (Ffess) and Its Applications to Thin Film Deposition
Deposition of TiO2 and silver thin films using multi jet FFESS is studied, demonstrating great control on film morphology and properties. TiO2 thin films deposited on high-intensity discharge arc lamps are found to improve the quality of its light output. Silver thin films of high purity and …
-
A Numerical Study of Supersonic Rectangular Jet Impingement and Applications to Cold Spray Technology
… that determine the success of particle deposition. Depending on the particle diameter and density, interactions of particles with the turbulent supersonic jet and the compressed gas region near the substrate surface can have significant effects on particle velocity and temperature. …
-
Processing-microstructure-property relations in high pressure cold spray of AA2024 and AA7075
… relationships is needed and improvements to deposition characteristics, microstructure and mechanical properties are necessary for successful application. This dissertation examines four aspects of the cold spray process applied to AA2024 and AA7075. First the effects of processing parameters …
-
DESIGN OF AN EFFICIENT AND RAPID CHEMICAL VAPOR INFILTRATION (CVI) RE-CIRCULATION SYSTEM
… Standard CVI systems have a total carbon deposition efficiency of 5-30% using a reaction zone filled with carbon fiber preforms. Total processing time varies from 50 to 2000 hours depending on the type of system and its temperature, pressure and residence time. Unused hydrocarbon reaction …
-
Density Functional Theory modeling of heterogeneous reactions of hydrocarbon intermediates on silicon carbide: surrogate kinetic model development for Chemical Vapor Infiltration
… of Methyl trichlorosilane during Silicon Carbide deposition from Chemical Vapor Infiltration to produce SiC-based ceramic matrix composites. High-performance applications require SiC-based materials; however, producing them presents difficulties due to limited deposition rates, high energy …
-
Electric Field Effects on Bacterial Deposition and Contaminant Sorption as Drivers of Bioavailability
… factors affecting bacterial transport and deposition and the interactions of contaminants with geo-sorbents, respectively. Studying electrokinetic effects on bacterial transport, we found that DC fields significantly changed bacterial deposition during transport in percolated laboratory …
-
Fundamental Study of Particle Formation, Transport, Deposition and Filtration for Semiconductor Applications
… process, particle formation, transport, deposition, and filtration studies should be simultaneously investigated. The objectives of this study were to 1) demonstrate particle formation in a particle-free environment, 2) investigate particle deposition and transport characteristics in …
-
Effects of surface properties on solder bump formation by direct droplet deposition
Recent advances in microdroplet generation and deposition processes have made it possible to directly form solder bumps on integrated circuits using micron-sized molten metal droplets. The direct droplet deposition bumping process can potentially produce uniform-sized bumps more economically than …
-
Tree-Inspired Water Harvesting
… trees, and to understand their collection efficiency and working principles. We accomplished that with scale-model and large-scale fog harps, floating leaves, and synthetic trees. Fluids mechanics, physics, and thermodynamics were applied to solve the problems and rationalize the results. …
-
Graphene Oxide Reinforcement in Plasma Sprayed Nickel-5%Aluminum Coatings
… suspension configuration resulted in a higher deposition efficiency of graphene oxide while the inert shroud configuration had a more homogeneous distribution and retention of graphene oxide in the coatings. The best overall coating was achieved using the inert shroud configuration using a …
-
Experimental Studies of Diesel Particle Filtration
… on a number of mechanisms for aerosol particle deposition that are analysed in the first part of this thesis. Experiments on a diesel burner designed to reproduce the particle emissions and exhaust conditions of a light-duty engine showed that turbulent deposition of large agglomerates in the …
-
Particle Motion in Flows: Contributions to Airborne Aerosol Measurement
… for turbulence generation and particle loss in deposition to the inlet walls. Reduction of turbulence makes it possible to model and solve the flows inside the inlets and calculate the particle trajectories using computational fluid dynamic (CFD) tools.</p> <p>A new technique is developed to …
-
Nanoparticle based chemotherapy for pulmonary drug delivery in treating lung cancer
… as particle size, surface charge, and entrapment efficiency of NIV formulations postpreparation, to determine their stability as a pulmonary drug delivery carrier. Finally, aerosol formulations of TPT NIVs or TPT solution were nebulized using a mesh nebulizer to determine drug deposition and …
-
Finding the edge: Net-shape surface sculpting during cold spray deposition
… a successful method for structuring cold spray deposition was developed, allowing the creation of defined surfaces from a previously uncontrolled deposition profile. When considering both additive and traditional manufacturing techniques, there remains a gap in the market for a high build rate, …
-
Deposition and characterisation of (Ti,Zr) based hard compound and multi-layer PVD films.
… production of such coatings is Physical Vapour Deposition (PVD) which has proved to be a consistent, reliable and improving technique for industry. In the area of advanced wear resistant coatings however, fundamental research to improve deposition efficiency and enhance coating performance has …
-
Chemoprevention of Lung Carcinogenesis: Aerosol Administration and Deposition in the Mouse Lung
… pulmonary surface area available for drug deposition, the avoidance of first-pass metabolic degradation by the liver and/or intestines, the noninvasive nature of administration, and the localized effect of low doses of drugs, all of which lead to a rapid response with fewer systemic side …