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 36 for “"bonding strength"”.
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Mechanical characterization of joints and Surface treatment to enhance their bonding strength
L'abstract è presente nell'allegato / the abstract is in the attachment
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The Effect of Atmospheric Pressure Plasma Treatments on Interfacial Bonding Strength of Ultrahigh Modulus Polyethylene Fibers to Epoxy Resin
… were tested for fiber/epoxy interfacial shear strength using the microbond technique at time intervals of 0, 3, 15 and 30 days after initial plasma treatment. Interfacial shear strengths (IFSS) for plasma treated fibers were 2 - 3 times as high as that of the control. The IFSS for the plasma …
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An evaluation of critical issues for microhydraulic transducers : silicon wafer bonding, strength of silicon on insulator membranes and gold-tin solder bonding
… development of MHT devices, are silicon wafer bonding, strength of silicon-on- insulator (SOI) membranes, and gold-tin bonding. Each of these topics was addressed independently. The mechanical integrity of silicon fusion bonds as a function of processing parameters was examined using a …
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Processing and Properties of Die-attachment on Copper Surface by Low-temperature Sintering of Nanosilver Paste
… (PO₂ from 0.04 atm to 0.14 atm caused the bonding strength to increase but eventually decline at higher partial pressure. Scanning electron microscopy (SEM) imaging and energy dispersive spectroscopy (EDS) analysis showed that there was insufficient oxygen for complete organics burnout at …
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Epoxy-Based, Rapid Setting Polymer Concretes for use in Military Airfield Repairs
… can resume. Due to their rapid-setting and high-strength properties, epoxy-based polymer concretes (PC) may provide a good alternative to the portland cement concrete (PCC) rapid repair mixes currently used by the United States Air Force (USAF) for their Rapid Airfield Damage Recovery (RADR) …
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SYNTHESIS AND CHARACTERIZATION OF ONE-DIMENSIONAL COPPER STRUCTURES
… of these devices depend on the robust bonding between the metal structures and the underlying substrates. Quantitative evaluation of the mechanical properties and bonding strength between the metal structures and substrates can provide guidance for device design, fabrication, and …
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On the Bone Tissue Response to Surface Chemistry Modifications of Titanium Implants
… surface chemistry modification enhanced the strength and speed of implant integration in bone and has become a marketing trend in the production of new implants. However, it is not clearly understood why and how strongly surface chemistry modifications reinforce the osseointegration of …
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Modeling reflective cracking development in hot-mix asphalt overlays and quantification of control techniques
… modulus of base and subgrade layers. Interface bonding conditions, especially bonding strength, affected the development of reflective cracking. Lower interface bonding strength resulted in greater potential for developing reflective cracking. The study concluded that the sand mix interlayer …
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Phase Stability In Cobalt-Based L12 Quaternary Intermetallics From Density Functional Theory
… supercell were visualized to analyze changes in bonding behavior. The results indicate that substitutions of Ti, Ta, and Hf in place of the central W atom increase phase stability by lowering the number of states at the Fermi level and decreasing the energy of the pseudogap relative to the …
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Copper Electrodeposition on Iridium, Ruthenium and Its Conductive Oxide Substrate
… thermodynamic data on relative difference of bonding strength between Cu-Ru/Ir atoms and Cu-Cu atoms. The monolayer of UPD on ruthenium is about 0.5mL, and on oxidized ruthenium is around 0.9mL to 1.0mL. The conductive oxide ruthenium presents the similar properties of ruthenium metal. The pH …
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Investigating the use of different types of sealant materials for cement remedial applications
… and have acceptable viscosity, high bond strength to casing, high injectivity, low permeability, high ductility and high compressive and tensile strength. Secondly, to evaluate the effectiveness of these materials to repair cement's flaws, in the lab, by using cement cores flooding …
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Layer bonding of solvent-cast thin films for pharmaceutical solid dosage forms
… required compression pressure for layer bonding and mechanical properties of materials should also be investigated. The bonding strength of solvent-cast thin film layers was quantitatively measured by lap shear test. Based on this measurement, bonding threshold pressure was proposed as an …
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Ultraviolet Bonding of Diamond Abrasive Tools for Lap-Grinding Process
… one focused on the polymerization of resin and bonding strength of the mixture.
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Mechanical behavior of nanostructured metallic films under compressive and shear loads
… the compressive and shear stiffnesses and bonding strengths of nanostructured thin films consisting of arrays of Cu and Ag helical springs. Rectangular areas of films were loaded in uniform compression and shear and the film properties were obtained through the load versus displacement …
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Mechanical reinforcement and property tuning of adhesive elastomers with polymer-grafted inorganic nanoparticles
… elastomer adhesives capable of instantaneous bonding to a substrate under light pressure. However, their viscoelastic nature renders them vulnerable to mechanical destruction, degradation, and creep, limiting their application window. Established methods for strengthening the PSA film have …
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Theoretical study on toughening and design against fracture of functionally graded thermal barrier coatings
… at interface corners, and increase in bonding strength. FG TBCs are able to survive very high temperatures and temperature gradients, which makes them very promising in many current and future applications including nuclear reactors, engines, turbines and leading edges of hypersonic …
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Fabrication of stress controlled silicon oxide for free- standing MEMS Devices
… risk of buckling were successfully fabricated. A bonding process of the low tensile stressed oxide films into SOI wafers was developed. SOI wafers were successfully fabricated and examined by SEM inspection. The bonding surface energy was estimated from a double cantilever beam theory (razor blade …
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The Development of Novel Interconnection Technologies for 3D Packaging of Wire Bondless Silicon Carbide Power Modules
… The preform was demonstrated to have 3.75× more bonding strength than a conventional sintered silver bond and passed rigorous thermal shock tests. A chip-scale and flip-chip capable power device was also developed. The novel package combined the ease of assembly of a discrete device with a …
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Systematic improvement and applications of density functional theory in complex chemical systems
… is shown to be useful for extracting chemical bonding information directly from the electron density and further applied to develop a simple and accurate hydrogen bonding strength indicator. Using SAH fragment densities, we demonstrate that MPE provides accurate description of reaction energies …
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Hydrogen bonding as it relates to miscibility of high performance poly(arylene ether)s with epoxy resins
… To evaluate better the role that hydrogen bonding plays in the miscibility of the poly(arylene ether)/epoxy blends, a fundamental investigation of hydrogen bonding between model compounds possessing functional groups of interest (e. g. diphenylsulfone, diphenylsulfoxide, pyridine, …
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