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 20 for “"Atmospheric Plasma"”.
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Exploring approaches to functional surface modifications using an atmospheric plasma jet printer
Atmospheric plasma jet printing is an exciting technology which uses plasma generated under atmospheric conditions to excite, ionize, and induce chemical interactions between the plasma and materials. The aim of this work is to use an atmospheric plasma jet printer to create highly functional, …
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Performance and reliability studies of Atmospheric Plasma Spraying Raney nickel electrodes for alkaline electrolysers
This PhD main aim was the examination of the Atmospheric Plasma Spraying Raney nickel electrodes samples with strong emphasis on electrochemical characterisation and investigation of the degradation/deactivation mechanisms which occur within the electrodes structure. Nowadays research in alkaline …
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Optimal Parameters for Doubly Curved Sandwich Shells, Composite Laminates, and Atmospheric Plasma Spray Process
… 10% higher than the first failure load. For the atmospheric spray process, we employ the NeSS algorithm to find optimal values of four process input parameters, namely the argon flow rate, the hydrogen flow rate, the powder feed rate and the current, that result in the desired mean particle …
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Adaptive Process Control for Achieving Consistent Mean Particles' States in Atmospheric Plasma Spray Process
The coatings produced by an atmospheric plasma spray process (APSP) must be of uniform quality. However, the complexity of the process and the random introduction of noise variables such as fluctuations in the powder injection rate and the arc voltage make it difficult to control the coating …
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The study of a drug coating applied using a cold atmospheric plasma: everolimus coating properties
… to heat and poses a risk of degradation. Cold atmospheric plasma (CAP) systems, which operate at low temperatures, offer a promising alternative by reducing thermal damage during deposition. The BioDepTM unit, a custom-built CAP system developed by TheraDep Ltd has been used for depositing …
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Study of microstructure effect on the thermal properties of Yttria-stabilized-Zirconia thermal barrier coatings made by atmospheric plasma spray and pressing machine
… The second set of samples was fabricated by Atmospheric Plasma Spray process for two different microstructure configurations, standard (STD) and vertically cracked (VC), and two different thicknesses, 400 and 700 micron respectively. A laser flash system was used to measure the thermal …
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Development of low coast atmospheric pressure plasma jet for nano and bio technology applications
The development of cold atmospheric plasma (CAP) can overcome many limitations of low pressure plasma. Low temperature plasma is widely used in the semiconductor and medical industry for cleaning purposes. However, the process is time consuming because low pressure plasma requires vacuum …
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Hydration-Induced Plasma Surface Modification of Aluminum Nanoparticles for Power Generation in Oxygen Deficient Environments
… surrounding the Al fuel core. One approach uses atmospheric plasma treatment to physically reduce the Al2O3 shell thickness while simultaneously exposing the defected surface to water vapor to promote surface hydration. Combining water-vapor with an atmospheric helium dielectric barrier discharge …
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Environmentally friendly corrosion resistant coatings as alternatives for cadmium and chromium in the aerospace industry
… containing 12 mass % manganese, applied with atmospheric plasma spraying, were tested as a possible alternative to cadmium electroplating. Complemented with the development of a permanganate-vanadate based conversion coating as an alternative to the Cr(VI) based treatment. The plasma sprayed …
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Design of Optical Measurements for Plasma Actuators for the Validation of Quiescent and Flow Control Simulations
The concept of plasma flow control is a relatively new idea based on using atmospheric plasma placed near the edge of an air foil to reduce boundary layer losses. As with any new concept, it is important to be able to quantify theoretical assumptions with known experimental results for validation. …
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Design, Development, and Calibration of an Electric Field Probe for Use on Sounding Rockets
… of high-energy particles from space with atmospheric plasma and the Earth’s natural magnetic field create many interesting interactions, many of which have direct impacts on the planet and human life. Understanding the dynamics of the upper atmosphere is a compelling endeavor, with much of …
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Study of magnetohydrodynamic effects for the Richtmyer-Meshkov instability
… or its growth, but rather developes an atmospheric plasma jet for use in future magnetohydrodynamic experiments. The operating conditions of the torch are explored to optimize the ionized length of the plasma jet by varying the voltage-current characteristics and the gas low rates. …
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Nanoscale Carbon Architectures for Electrode Applications
… a variety of carbonaceous nanomaterials using plasma torch and furnace-based expansion-reduction techniques. The second objective was to correlate the unique characteristics of these materials to their electrical properties when assembled into electrochemical double-layered capacitors (EDLCs), …
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Deposition of yttria-stabilized zirconia thermal barrier coatings by laser-assisted plasma coating at atmospheric pressure
… generation system, and a coaxial cylindrical plasma torch, where an atmospheric-pressure plasma (APP) can be generated using 2.45 GHz. The discharge characteristics of the atmospheric plasma, such as electron temperature Te, electron density ne, and plasma gas temperature Tg, are …
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Initial results for dose-to-clear reduction using the integrated circuit manufacturing with plasma activated chemical treatment (IMPACT) tool
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Wool fabric plasma treatment: resulting properties evaluation and applications in field
… come from technological transfer from research. Plasma treatment being based on a gaseous technology does not require to use many chemicals, as well as the precious resource given by freshwater. In this view, plasma treatment of textile materials appears very promising in replacing a number of …
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Elucidating strategies to design tailored chitosan surfaces with enhanced antibiofouling and biocompatibility properties via plasma assisted processes
… surfaces with antibacterial properties, based on plasma and ion irradiation processes. Chitosan and silver were used as the platform to produce antibacterial surfaces. The first part of this work focuses on the study of ion irradiation of chitosan membranes. This surface treatment induced chemical …
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The Adhesion Strength of a Plasma Sprayed Silicon Bond Coating on a Silicon Carbide Ceramic Matrix Composite
… environment. EBCs are typically deposited via atmospheric plasma spraying (APS) and preparing the component surfaces through cleaning and roughening prior to coating is a vital step to ensure sufficient coating adhesion. The adhesion of a plasma sprayed coating to the underlying component is …
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Improvements on dielectric barrier discharge applications: Plasma photonic crystal tuning by individually controlled filaments and surface DBD water treatment
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms