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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 54 for “"interfacial adhesion"”.
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Interfacial adhesion of thin film high energy density anode materials
… of Ni/a-Si systems. Here, we investigate Ni/a-Si interfacial adhesion strength through the technique of laser spallation (LS) combined with finite element analysis (FEA). It was found that the Ni/a-Si interface can withstand at least ~250 MPa in tension before failure is initiated. Tests at higher …
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Measurement of Interfacial Adhesion in Glass-Epoxy Systems Using the Indentation Method
The adhesion of coatings often controls the performance of the substrate-coating system. Certain engineering applications require an epoxy coating on a brittle substrate to protect and improve the performance of the substrate. Experimental observations and measurements of interfacial adhesion in …
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The influence of surface properties on carbon fiber/epoxy matrix interfacial adhesion
… but also to a great extent on the fiber/matrix interfacial adhesion. The focus of this work was to study carbon fiber surface chemical and physical properties and their effects on fiber/matrix adhesion. Untreated, commercially surface treated and oxygen plasma treated PAN based carbon fibers …
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Amine functionalization by initiated chemical vapor deposition (iCVD) for interfacial adhesion and film cohesion
Amine functional polymer thin films provide a versatile platform for subsequent functionalization because of their diverse reactivity. Initiated chemical vapor deposition (iCVD) is a polymer chemical vapor deposition technique that utilizes the delivery of vaporphase monomers to form chemically …
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Determining Interfacial Adhesion Performance and Reliability for Microelectronics Applications Using a Wedge Test Method
… for characterizing material resistance to interfacial failure and for making interface reliability predictions. Because interfacial bond integrity is a major concern for performance and reliability, the need to evaluate the fracture and delamination resistance of an interface under …
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Interfacial Adhesion Evaulation of Uniaxial fiber-Reinforced-Polymer Composites by Vibration Damping of Cantilever Beam
… properties of the fiber-matrix interface. Good interfacial bonding (or adhesion), to ensure load transfer from matrix to reinforcement, is a primary requirement for effective use of reinforcement properties. Thus, a fundamental understanding of interfacial properties and a quantitative …
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Mode I and Mode II Measurements For Stiction Failed Micro-Electro-Mechanical Systems
… failure is stiction. Stiction is the unintended adhesion between two surfaces when they are in close proximity to each other. Various studies have been conducted in recent years to study stiction. Our research group has shown the in-service repair of the stiction failed MEMS devices is possible …
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Elastic and Thermoelastic Stresses in Biomedical Sensors and Bicomponent Fibers
… customized blister test was devised to quantify interfacial adhesion energy for industrially relevant polymer pairs such as polypropylene/polyethylene (PP/PE). Analytical models were developed to predict thermoelastic stress distributions across common fiber cross-sections, with the …
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The investigation of acid/base interactions in the adhesion of carbon fibers to thermoplastic matrices
… an important role in the optimization of the interfacial adhesion of reinforcing carbon fibers to thermoplastic polymer matrices. Inverse gas chromatography (IGC) and x-ray photoelectron spectroscopy (XPS) were used to characterize the acid/base nature of the carbon fiber surfaces. Capillary …
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Lyocell Fiber-Reinforced Cellulose Ester Composites - Surface and Consolidation Considerations, and Properties
… (lyocell). Of particular concern were both the interfacial adhesion between the fiber and matrix and the consolidation process in the manufacture of these composite materials. Interfacial adhesion was found to be substantial due to the relative lack of the fiber pull-out phenomenon observed …
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Design and Materials Applications of Quadruply Hydrogen-Bonding Modules
… of these functionalized surfaces and polymers as interfacial adhesion promoters is described.
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The processing and characterisation of recycled glass fibre composites
… a screening tool to detect general trends of the interfacial adhesion between glass fibres and PP matrix. However, micromechanical tests like the microbond tests are still required for more detailed studies of the interfacial adhesion because the composite tensile properties are often affected by …
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Hydrothermally extracted nanohydroxyapatite from bovine bone as bioceramic and biofiller in bionanocomposite
… tensile strength of bionanocomposite due to poor interfacial adhesion. The interfacial adhesion was improved by loading of 1.0 wt% maleic anhydride (MAH) as a compatibilizer. The biocompatibility of bionanocomposite was evaluated in simulated body fluids (SBF). The results showed that apatite …
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Effects of Surface Microstructure on the Strength of Adhesively Bonded Structures
… from the aluminum substrate using a steel wedge. Interfacial fracture energy was extracted from the debond length by developing a closed-form solution for the specimen geometry based on a ""beam on an elastic foundation"" model. The experimental observations established a direct relationship …
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Highly Tough, Stiff, and Transparent Poly(Methyl Methacrylate) Composites Incorporating Thermoplastic Elastomer Nanofibrils
… deformation speeds, as well as the role of interfacial adhesion and its impact on the toughening performance of the elastomeric nanofibrils. Additionally, the effects of incorporating elastomeric nanofibrils on various properties of PMMA, including mechanical behavior, light transmittance, …
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Enhancing the mechanical and chemical integrity of Ag/ZnO-based transparent and conductive thin film coatings: an atomistic modelling study
… conductive electrodes) is still hindered by the adhesion between Ag and ZnO that results in a weak Ag/ZnO interface. This weakness is further reflected by the observed dewetting of Ag on ZnO. Optical coatings containing these stacks also require them to survive a glass tempering process, during …
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Measuring and Improving Copper-Polyimide Adhesion
… cluster formation. Values of the strength of adhesion from these contact angle measurements are in reasonable agreement with predictions made using Fowkes' theory of non-polar interfacial adhesion. It was also predicted and observed that the copper clusters tended to embed into the polymer …
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On the role of topology and micro-structure on the adhesion and fracture of soft materials
… in the bulk or at the interface. Thus, the adhesion and fracture properties of soft materials have been the main focus of many experimental and theoretical studies. In this research, we focus on the effects of the macro and micro scale topology on the adhesion and fracture of soft materials. …
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X-ray diffraction studies of evaporated gold thin films deposited on aluminum nitride substrates
… may serve as an indirect measure of the interfacial adhesion
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Tough wet adhesion of hydrogel on various materials : mechanism and application
In nature, robust interfacial adhesion plays crucial roles in maintaining integration and functionality of various physiological structures including tendon and cartilage to bones and epidermis to dermis in mammalian skins. For instance, the bonding of tendon and cartilage to bone is extremely …
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