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 21 for “"spray deposition"”.
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Spray deposition of cork reinforced polyester
… initial investment and high flexibility of the spray lay-up process make it an attractive candidate to study. A spray lay-up apparatus was successfully constructed and employed in manufacturing parts from a hybrid material composed of granulated cork, chopped glass strand, and a polyester …
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The Moisture Transport Properties of Cement Mortar under Salt Spray Deposition
… and indoor thermal comfort. Due to the salt spray climate, the external boundary conditions of buildings in coastal areas differ significantly from those in inland regions. Under salt spray deposition, salt crystals accumulate and expand within the pores of building materials, which not only …
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Finding the edge: Net-shape surface sculpting during cold spray deposition
… of how 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 …
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Liquid Atomization by an Electrostatic Rotating Bell Atomizer and Spray Deposition on Solid Surfaces
… it breaks up into droplets. Images of these spray droplets were captured using a DropSizer while operating the bell-cup at various angular frequencies (ω). After processing the images to obtain the droplet sizes, the Sauter mean diameter (SMD) was found to decrease as the angular frequency …
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Enhancing the Photovoltaic Performance of P3HT/PDIB Silsesquioxane Donor-Acceptor System Using Spray Deposition Fabrication Technique
… Recently, it has been recognized that the deposition techniques also plays a major role in enhancing the power conversion efficiencies. Currently, though the most common deposition technique for organic solar cells is spin coating, which does not allow scaling up of the large device area. …
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Assessing Spray Deposition and Weed Control Efficacy from Aerial and Ground Equipment in Managed Turfgrass Systems
There is a growing interest in agricultural spray drone (ASD) use for herbicide application in managed turfgrass systems, which historically has precluded aerial application. Considering pesticide deposition accuracy is of utmost importance in managed turfgrass systems, a thorough examination of …
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Liquid dynamic compaction spray deposition of commercial and modified 3003 Al-alloy : process application and materials characterization
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Process-Microstructure-Property Relationships of High-Pressure Cold Spray Deposition of Aa7050 After in Situ Laser Heat Treatment
… to develop and characterize high-pressure cold sprayed AA7050 after in situ laser heat treatment. Successfully cold sprayed aluminum alloys with a low porosity promotes the idea to apply the cold spray technique from dimensional restoration to load-bearing structural repair. Recent literature …
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Assessing and Enhancing Seawater Corrosion Performance of Aluminum Alloy 7075 and 2024 Additive Repairs Produced by Cold Gas Dynamic Spray Deposition
… is to investigate the corrosion behavior of cold sprayed (CS) aluminum alloys 2024 and 7075 in an immersed seawater environment, and improve understanding of CS processing-microstructure-corrosion property relationships. As a low temperature additive spray technique, CS has an attractive ability …
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Transparent Platinum Counter Electrode for Building Integrated Dye-sensitized Solar Cells
… electrodes (CE) has been developed based on spray deposition of Pt nanoparticles (Pt-NPs) on hot substrates. The platinum consumption hence the cost of the counter electrode was reduced over 86%, compared to conventional Pt counter electrode prepared by sputter deposition method. The prepared …
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The fabrication of high packing density ceramic powder beds for the three dimensional printing process
… used to create structural ceramic parts using spray dried powders. Although fully dense parts have been made, it has been necessary to use an iso-static pressing step before sintering. Such a step has many disadvantages such as causing anisotropic shrinkage, warping, and lower part yields. In …
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Processing and Characterization of Multifunctional Thermoplastic Nanocomposite Films
… films. In this work, a scalable and continuous spray deposition process was developed for the production of nanoparticles reinforced multifunctional thermoplastic nanocomposite films. This process is capable of making a thin sheet of thermoplastic nanocomposites with high nanoparticle loadings. …
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Evaluating the Efficacy of Targeted Pesticide Applications and Machine Learning Integration for Precision Turfgrass Management
… Global Navigation Satellite System (GNSS)-guided sprayers to apply pesticides solely to pest-affected areas as opposed to traditional broadcast pesticide applications. However, significant barriers have hindered the widespread adoption of these practices. A prominent limiting factor to the …
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Atomic force microscopy methods to study protein phase transitions
… of these ‘pores’. In this case, the deposition of the heterogeneous sample onto a 2-dimensional surface enabled us to capture and characterise an assembly state which is not readily detectable using bulk methods. However, the deposition of samples onto a surface generally represents …
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Design of experiment analysis of high velocity oxy-fuel coating of hydroxyapatite
… the high velocity oxy-fuel (HVOF) thermal spray process has been widely adopted by many industries. Though there are different types of flame spraying processes, the HVOF thermal spray process utilises only powder as the coating material rather than wire or rod. Carbon-hydrogen group of …
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Characterization of Fungicide Resistance in Venturia inaequalis Populations in Virginia
… at the AHS AREC were analyzed for manganese deposition, pre- and post-mancozeb application. Fungal isolates (N=105) were collected from several locations within the canopy in replicated trees in the same orchard. Weather sensors also monitored the microclimates within those tree canopies. …
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Factors governing zoysiagrass response to herbicides applied during spring green-up
… heat unit based application timings, and spray penetration into zoysiagrass canopies as possible contributors to zoysiagrass injury. The results indicated that a wide range of herbicides may be safely used in dormant zoysiagrass. However, as zoysiagrass begins to produce more green leaves, …
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Synthesis and patterning of reactive silver inks
… conformally over large areas using aerosol spray deposition. The patterned features exhibit an electrical conductivity of 90% of bulk silver upon annealing at 100°C. The conductivity of these features can vary based on heating rates and relatively humidity. Also, this ink cannot be readily …
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Fabrication and analysis of CIGS nanoparticle-based thin film solar cells
… non-traditional fabrication processes, such as spray-coating for the low-cost and highly-scalable production of CIGS-based solar cells. CIGS nanoparticles were synthesized and analyzed, thin CIGS films were spray-deposited using nanoparticle inks, and resulting films were used in low-cost …
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