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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 61 for “"Interlayers"”.
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Applications of powder interlayers for large gap joining
… of damaged parts. Several methods using powder interlayers to produce large clearance transient liquid phase (TLP) joints have been developed and investigated in this work. One of the methods was using a mixture of powders of the melting point depressant (MPD) and the base material, from which a …
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Statistical Analysis Of Diffusion Bonding Nickel Using Brass Interlayers
<p>The goal of this project is a statistical study of diffusion bonding of commercially pure Ni with a brass interlayer. Four factors were investigated; time, temperature, surface finish, and foil thickness. A Box-Behnken design was selected to analyze the system for composition and strength of the …
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A framework for designing interlayers for ceramic-to-metal joints
… This thesis proposes improved design rules for interlayers used to accommodate residual stresses in ceramic-to-metal joints. Efforts have been made on developing theoretical understanding of the important factors affecting residual stresses. Using Finite Element Method (FEM) simulations and …
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Low temperature solid state bonding of copper using sputtered silver interlayers
Includes bibliographical references.
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Spin-mixing and transport through superconducting interlayers in ferromagnetic Josephson junctions
The creation of spin-polarization in the superconducting state raises possibilities for low-energy logic and memory elements. Supercurrents of spin-aligned triplet Cooper pairs (or ’triplet pairs’) can be generated at magnetically inhomogeneous superconductor/ferromagnet interfaces, and have a …
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Impact Mechanics of PMMA/PC Multi-Laminates with Soft Polymer Interlayers
… thermoplastic polyurethane and four polyacrylate interlayers. Quantitative metrics from force and displacement signals, along with post-impact damage observations, are used to compare impact performance between configurations and impact velocities (12 and 22 m/s). In general, the presence and …
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Effects of Ultrathin Interlayers on Thermal Boundary Conductance at Metal-Dielectric Interfaces
… by inserting few-nanometer thick metal interlayers. A thickness-dependent interlayer study suggests that interfacial conductance alters significantly at ultrathin thicknesses before reaching a plateau. Our results reveal that the electron-phonon coupling strength of an interlayer plays a …
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Development of New Cathodic Interlayers with Nano-Architectures for Lithium-Sulfur Batteries
… brush-like, zinc oxide (ZnO) nanowires based interlayers were prepared ex-situ using a wet chemistry method and were coupled with a sulfur/multi-walled carbon nanotube (S/MWCNT) composite cathode. The cell with this configuration showed a good cycle life at a high current rate ascribed to (a) …
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Role of polythiophene- based interlayers from electrochemical processes on organic light-emitting diodes
In this work, well-defined and stable thin films based on polythiophene and its derivative, are employed as the hole-injection contact of organic light-emitting diodes (OLED). The polymer films are obtained by the electropolymerization or the electrochemical doping/dedoping of a spin-coated layer. …
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Deposition and Characterization of Silicon Nitride/gallium Arsenide Metal Insulator Semiconductor Structures With Heteroepitaxial Interlayers
… of GaAs MIS structures with strained heterointerlayers has been undertaken by exploiting the unique and powerful capabilities of the Epicenter growth and analysis facilities at the University of Illinois. The novel heteroepitaxial interlayers employed between Si$\sb3$N$\sb4$ and GaAs are Si, …
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The effect of interlayers on the mechanical response of composite laminates subjected to in-plane loading conditions
… baseline (non-interlayered) configuration. The interlayers, 0.0005 in. each in thickness, appeared between each ply in every Iaminate tested. Both configurations of these two material systems were subjected to a regimen of in-plane loading tests. These tests included monotonic tension and …
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Design, fabrication, and characterization of germanium MOSFETs with high-k gate dielectric stacks based on the nitride interfacial layers
… so an interfacial layer is required. Proposed interlayers include GeON, Si, and metal nitrides such as AIN and Hf3N4. This work focuses on the fabrication and characterization of germanium MOSFETs with GeON, Hf3N4, and AIN interlayers. WN/A1203/AIN gate stacks deposited by atomic layer …
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Investigating the Interfacial Evolution of Lithium Metal in Anode-Free Batteries with Liquid and Solid-State Electrolytes
… exploring methods, such as the use of alloy interlayers, to spatially control Li deposition/stripping behavior. The nucleation and growth of Li on bare current collectors is first explored in liquid electrolyte systems by combining electrochemical methods with operando optical microscopy. We …
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Thermal and Electrical Considerations for the Design of Highly-Integrated Point-of-Load Converters
… on top using polyimide dielectric interlayers. The milling of AlN ceramic is a very costly and time consuming task due to the brittleness of the material, and the interlayers add additional complexity to the fabrication process. Philip's PCB integration was primarily aimed at …
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Novel magnetic behavior in heavy rare earth superlattices
… metals, and superlattices of rare earths with Y interlayers, are grown along different hcp orientations using novel techniques developed specifically for this thesis research. Interesting growth patterns and surface reconstructions are observed, particularly on the a and b faces of the hcp …
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Structural and magnetic properties of erbium thin films and erbium/yttrium superlattices
… are coherent through the nonmagnetic yttrium interlayers.
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Structural and magnetic properties of erbium thin films and Er/Y superlattices
… are coherent through the nonmagnetic yttrium interlayers. The primary differences between the magnetic behavior of bulk Er and both the films and superlattices are the absence of the Er ferromagnetic state, the enhancement of the critical fields and the reduction of the Neel temperatures. …
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Capillary Effects of Nanoporous Networks on Aerospace Autoclave-grade Prepreg Composites Enabling Vacuum-bag-only Manufacturing
… aerogel is preliminarily investigated. EPN NPN interlayers are able to create void-free laminates as revealed by micro-computed tomography (µCT) on flat aerospace-grade CFRP laminates using unidirectional epoxy-based prepreg plies. The VBO cured EPN NPN laminates are also found to have the same …
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Transient Liquid Phase Bonding of Titanium-, Iron- and Nickel- Based Alloys
… been diffusion bonded using silver and copper interlayers and without any interlayer. With a silver (Ag) interlayer, different intermetallics (AgTi, AgTh) appeared in the joint centerline microstructure. While with a Cu interlayer eutectic mixtures and Ti-Cu solid solutions appeared in the …
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Adhesion Strength of Cordierite Bulk Coatings on Molybdenum Substrates
… was adhered to molybdenum using various metallic interlayers of copper, nickel, and chromium. The development of a coating adhesion test methodology was required to choose between interface designs. An indentation method was chosen because of ease in testing and availability of fracture mechanics …
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