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 14 of 14 for “"Casting Techniques"”.
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Improving lithium-ion battery power and energy densities using novel cathode architectures and materials
… Using external AC electric fields and casting techniques, the anisotropic colloids were made into useful templates for cathode fabrication. Nickel electrodeposition through the anisotropic colloidal templates, with subsequent template etching, produced nickel current collectors with …
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Preparation and characterization of new porous ceramic filters for hot gas clean-up
… organic pore formers using refractory concrete casting techniques. Methods used to characterize the porous ceramic filter elements included determination of pore size and distribution, permeability, resistance to alkali attack, and mechanical strength. Various pore formers and casting, curing, …
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Mechanical properties of laser welded semi-solid metal cast A356 alloy
… Al usage has led to the improvement of both the casting techniques and joining processes, in order to improve on the quality of the final product. The selection of the manufacturing process for Al and its alloys is based on the capabilities of the specified requirements for components and the …
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Design, Fabrication and Testing of Fiber-Reinforced Cellular Structures with Tensegrity Behavior using 3D Printed Sand Molds
… the combination additive manufacturing and metal casting techniques. Tensegrity structures provide high stiffness to mass ratio with all the comprising elements experiencing either tension or compression. This research investigates the possibility of integrating tensegrity behavior with cellular …
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Development of Electrochemical Sensors Suitable for In Vivo Detection for Neurotransmitters
… neurochemicals, showed that commonly used drop-casting techniques deposit nanoparticles non-uniformly. More reproducible modification methods are needed. The work in this dissertation demonstrates the capabilities of redox cycling for multi-neurotransmitter analysis and sets the foundation for …
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Building and controlling fluidically actuated soft robots : from open loop to model-based control
… with an environment. The design and fabrication techniques for our soft robots include the development of soft actuator morphologies, soft casting techniques, and closed-circuit pneumatic and hydraulic powering methods. With a modular design approach, we combine these soft actuator morphologies …
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Development of Nano-scale Featured Materials for Electrode Modification and Solid Supports.
… thin films were developed using a combination of casting techniques and templating. Macroporsity was introduced to the silica thin films by either doping the silica sol before casting or by ordering the template on a substrate and then casting a sol over it. These techniques were first used to …
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Development of high energy density dielectrics for pulse power applications
… studies and was fabricated using slip casting techniques. The BDS of TiO<sub>2</sub> decreased by a factor of 2- 3 with increases in the thickness and electrode area due to the "weakest link" theory. The BDS also decreased with increasing amounts of porosity, but defects with sizes …
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Performance and Design of Extruded Fiber-Reinforced Mortar with Preferentially Aligned Fibers
… method to explore the effects of different casting techniques – namely, conventional casting and pump-driven extrusion – on the performance of FRC. The core hypothesis tested throughout these studies suggests that the extrusion process, by aligning fibers parallel to tensile stresses, …
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Microstructural evolution during hot deformation of the 6061 aluminium alloy based Al₂O₃ metal matrix composites
The development of conventional direct casting techniques to produce aluminium alloy based metal matrix composites and the successful fabrication of these composites by extrusion and forging processing has contributed to their successful commercialization. The Center for Metallurgical Process …
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Micromechanistic analysis of fatigue in aluminium silicon casting alloys
… typically produced from multi-component Al-Si casting alloys. These alloys exhibit a complex, multiphase microstructure comprising α-aluminium as the matrix with silicon particles and several intermetallic phases. Previous research on Al-Si casting alloys has demonstrated that porosity is …
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Self-Replenishing, Wear-Resistant and Anti-Sticking Surfaces Based on Liquid Impregnation of Microstructured Mesoporous α-AI₂O₃ [Alpha Alumina] Matrices
… samples was developed using replication and slip casting techniques. The microstructures are first replicated into polydimethylsiloxane (PDMS) membranes using excimer laser ablated polycarbonate sheets and are subsequently employed as molds in the alumina slip casting process. The developed …
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Marginal Discrepancy of Components Utilized for Implant Framework Construction
… components were recorded before and after casting as well as after finishing and polishing procedures.</p> <p>Measurements of the premachined gold abutments were obtained before and after casting. CAD-CAM custom premachined titanium abutments and CeraOne® premachined titanium abutments were …
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(At)testing Virtue: Shine and the Materiality of Metals in the Construction of Habsburg Nobility (1477–1519)
… in the context of contemporary metallurgical techniques and narratives of ingenious crafting. The third chapter hones in on Maximilian’s planned tomb monument and the way he sought to surround his mortal remains with a veritable flock of copper-alloy statues. If steeped in antique gravitas, …