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 22 for “"Interface materials"”.
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Polyelectrolyte multilayers : nanofabricated architectures for bio-interface materials
… multilayers for biosensor and other biomaterials applications. This thesis further explores the rationale of using multilayers as biomaterials, with particularly emphasis on the importance of the underlying molecular architecture. Many of the results presented here concern films …
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System Design, Fabrication, and Characterization of Thermoelectric and Thermal Interface Materials for Thermoelectric Devices
… endeavors have been made to design and fabricate materials with a higher dimensionless thermoelectric figure of merit (ZT), as well as to optimize the device structure and packaging to manage heat more effectively. When evaluating candidate thermoelectric materials, one must accurately …
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Thermal and thermo-mechanical performance of voided lead-free solder thermal interface materials for chip-scale packaged power device
… crucially to enhance thermal transfer across the interface. Extensive review shows that solder thermal interface materials (STIMs) apparently offer better thermal performance than comparable state-of-the-art commercial polymer-based TIMs and thus a preferable choice in packaging power devices. …
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Packaging designs for ultraviolet light emitting diodes
… difficulties in the growth&doping of AlₓGa₁₋ₓN materials and UV absorbing substrates leading to excessive joule heating, which leads to device degradation and a spectral shift in the emission wavelength. With this regard, effective thermal management in these devices depends on the removal of …
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An Investigation of the Tensile Strength and Stiffness of Unidirectional Polymer-Matrix, Carbon-Fiber Composites under the Influence of Elevated Temperatures
… the experimental results. The different matrix materials were polyphenylene Sulfide (PPS), vinyl ester with two different fiber-matrix interface materials, and polyether ether ketone (PEEK).
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Studies of Interfacial Phenomena: Alkanethiol Adsorption and Patterning on Gold and the Superconducting Proximity Effect in Superconductor /Semiconductor Systems
… proximity effect at Nb/InAs and NbN/InAs interfaces. Previous investigations of Nb/InGaAs show an excess conductance at low bias voltages when the system is superconducting. However, current models do not sufficiently explain this excess conductance. Raman spectroscopy is used in this …
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Advanced Thermal Management Strategies – Scalable Coal-Graphene based TIMs and Additively Manufactured Heat Sinks
… additives to develop thermal interface materials with superior performance and the second by using advanced metal additive manufacturing techniques to design and analyze metal-lattice based heat sinks are presented. Thermal Interface Materials with multiple carbon-based …
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Heat transfer in nano/micro multi-component and complex fluids with applications to heat transfer enhancement
… are done using MPI (message passing interface) method. Convective heat transfer in internal suspension flow (low solid volume fraction, φ<10%), heat transfer in hot pressing of fiber suspensions and thermal performance of particle filled thermal interface materials (high solid volume …
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Analysis of Direct-Soldered Power Module / Heat Sink Thermal Interface for Electric Vehicle Applications
… the thermal impedance at the module / heat sink interface, as compared to the conventional method of bolting the two together with a thermal grease or some other interface materials in between. However, a soldered interface typically contains a large number of voids, which results in local hot …
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First Principles Investigations of Solid-Solid Interfaces in Lithium Battery Materials
… methods to model electrode/electrolyte interfaces for inorganic solid electrolyte materials, especially those related to Li$_3$PS$_4$. I develop a general scheme based on the interface energy for analyzing interfaces between crystalline solids, quantitatively including the effects of …
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Investigation of thermal management options for robots
… forced air/liquid systems, heat pipes, thermal interface materials, thermoelectric generators, phase change materials, thermal insulating materials, etc. Three different thermal insulating materials (namely stone wool, fiberglass, and extruded polyurethane) and an air heating/cooling thermal …
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Investigation of the interface shearing resistance of steel and concrete on different rocks for renewable energy gravity foundation applications
… shearing resistance of the foundation – seabed interface materials by means of laboratory element testing. <br/><br/>Interface tests of five different rock types (representative of sites with tidal energy potential around the U.K.) on steel and concrete were carried out under a range of normal …
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Carbon nanotube thermal interfaces and related applications
<p>The development of thermal interface materials (TIMs) is necessitated by the temperature drop across interfacing materials arising from macro and microscopic irregularities of their surfaces that constricts heat through small contact regions as well as mismatches in their thermal properties. …
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Controlling the structure and dynamics of magnetoresponsive particle suspensions for enhanced transport phenomena
… (e.g., an epoxy system), then composite materials with particular, field-directed particle assemblies can be created. Given the many combinations of various particles, suspending fluids, and magnetic fields, a vast array of behavior is possible: the formation of anisotropic particle …
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Nano-scale Heat Transfer in Nanostructures: Toward Understanding and Engineering Thermal Transport
… on heat transfer in nanostructures and amorphous materials, in which the arrangement of atoms is crucial for the effectiveness of heat transport. Defects and mechanical deformations in a material which cause displacement or reconfiguration of atoms relative to that material’s “normal” or …
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Characterizing the Thermal Behavior of Pyrolytic Graphite Sheets (PGS) at Low Interface Pressures
… has led the Navy to pursue the design of a dry interface liquid cooling system to cool the iPEBB. This means that no liquid can cross the boundary of the iPEBB and thus the cooling system must be separate. In this thesis, an integral portion of the dry interface cooling solution, the thermal …
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Transport properties of graphite-loaded composites in liquid and solid states
… regulation of building temperature, thermal interface materials, directional heat spreader, etc. The understanding of structure-property relation could also help uS better design composite materials with superior performance..
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Silicon nanospring films for multifunctional interfaces
The mechanical behavior of thin films comprised of dense arrays of Si nanosprings and nanocolumns, and the mechanical and chemical lithiation properties of individual structures isolated from these films were investigated in this dissertation research. The nanostructured films, fabricated via …
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Multi-scale electrical and thermal properties of aligned multi-walled carbon nanotubes and their composites
… effective use of CNTs is limited in macroscopic materials due to numerous issues including difficulties in processing; favorable CNT properties have not translated straightforwardly into macroscopic property enhancement. Factors that cause such scaling and compositing effects include CNT quality, …
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Multi-component Elastomer Composites for Next Generation Electronics and Machines
Multi-component soft materials offer innovative solutions for traditional and emerging technologies by possessing unique combinations of tunable functionality and adaptive mechanical response. These materials often incorporate functional inclusions such as metals or ceramics in elastomers to create …
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