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 271 for “"sealing"”.
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Paravalvular sealing pf percutaneous heart valves
… transcatheter heart valves (THV's) rely on sealing skirts made from treated pericardium or polyethylene terephthalate (PET) fabrics. The current study was aimed at developing novel electrospun skirts for the minimization of PVR in THV's. Thermoplastic polyurethane (TPU) was electrospun onto …
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Fracturing and sealing in geothermal systems.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science.
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Sealing of partially evacuated solar solar collectors
… polymer sealed collectors; for various vacuum sealing polymers. It is shown that viton is the most suitable polymer, and a design of a suitable seal is shown, with the design of a completed unit. An upper limit of loss of vacuum in the collectors is demonstrated to be 0.5 torr/year. This is due …
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Sealing potential of heterogeneous caprock in subsurface storage
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Ultrasonic Sealing of Aluminum Foil Based Laminate Food Packaging Materials
The feasibility of sealing three-layer aluminum foil-based flexible laminates using ultrasound technology was studied. The experimental results of seal evaluation provide sufficient evidence that ultrasonic sealing of MRE (Meals Ready to Eat) foil laminate package is technically feasible.High …
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The colouring, sealing and abrasion resistance of anodic oxide coatings
… upon the control of the anodising, colouring and sealing processes. The quality of the anodic oxide film is determined by assessment tests. The use of a nitric acid ‘predip’ on soft films was shown to dissolve a soft outerlayer. A new admittance test was devised in which the ‘drift’, Y, was …
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Development of Carbon Nanofiber Reinforced HNBR Composite for Sealing Applications
Carbon nanofiber(CNF) as a novel filler has been studied by researchers with huge enthusiasm owe to its special properties, like light weight, sustainability of large deformation, chemical stability, corrosion and fatigue resistance, vibration and noise reduction capability, especially in rubber …
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Sealing performance assessments of bentonite and bentonite/crushed rock plugs.
… of bentonite and crushed rock are potential sealing materials for high level nuclear waste repositories. The materials have been used to form cap layers to reduce infiltration for mined waste tailings and can also be used to construct clay liners for municipal as well as industrial waste …
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Characterization of turbine rim seal flow and its sealing effectiveness
In a gas turbine engine, ingestion of hot gas from the flowpath into the gaps between the turbine rotor and stator can lead to elevated metal temperatures and a deterioration of component life. To prevent ingestion, bleed air from the compressor is used to "purge" the rim seal cavities. …
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Design of a hermetically sealing inlet for in-situ planetary exploration
… The key attributes of the design are the sealing interfaces and an inverted dovetail cross sectional geometry for a linear carriage. The inlet emphasizes a design for manufacturability, weight savings, durability, and many cycles. Based on the established fundamental requirements, the …
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A Multifunctional Patch for Minimally Invasive Tissue Sealing: Design Strategies and Applications
… Compared to the traditional mechanical sealing modalities, bioadhesive materials are generally associated with short application times and reduced tissue damage. However, the complexities of delivering bioadhesive materials through narrow spaces and achieving strong adhesion in …
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Alternative Methods for Sealing Overlapping Steel Members with Narrow Gaps During Galvanizing
Narrow gaps in overlapping structural steel surfaces are problematic when being hot-dip galvanized due to the potential for trapped cleaning solutions between the surfaces. A seal-weld is often used to prevent the cleaning solutions from penetrating this gap. However, these welds are not necessary …
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Three-dimensional modeling of sealing and wear of XTS-210 engine Apex seals
… and provides recommendations for improving its sealing system through advanced modeling and design optimization.
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Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
… um) and concentration (0 - 12.2 wt%) on the self-sealing ability was investigated. Composite specimens with 6.5 wt% 51 um capsules sealed 67% of the time, compared to 13% for the control panels without healing components. A thermally stable, dual microcapsule healing chemistry comprised of silanol …
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Fluid Sealing Challenges in Solid Oxide Electrolysis Cells and Rapid Swap Battery Systems
… is documented. As an alternative to current sealing methods, initial development of a composite seal utilizing materials and manufacturing methods originating in the semiconductor industry was also conducted. The final section of the thesis proposes the concept and covers initial testing of …
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