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 87 for “"Coating Thickness"”.
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Design, construction and commissioning of an automated optical fibre catalyst coating process for use in photocatalytic reactor systems
… P25 (TiO2). A multi-step optical fibre coating process was developed to achieve the desired coated optical fibre as a product. It consists of 6 major units that process raw (polymer-coated) optical fibre into catalyst coated optical fibre. The steps include the 4 essential steps required …
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Synthesis and indentation of boride and carbide coated carbon nanotube composite microstructures
… and mechanical behavior of novel refractory coatings for applications subjected to extreme conditions. Starting from aligned carbon nanotube (CNT) forests as scaffolds, composite foams are fabricated by infiltration with refractory materials to achieve desirable mechanical properties such as …
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Enhancement of Pool Boiling Heat Transfer by Brazed Aluminum Microporous Coating in Saturated Water
… work by adding an aluminum microporous coating onto an aluminum surface. Specifically, a high temperature thermally conductive microporous coating (HTCMC) is developed for an aluminum surface. The coating is manufactured by brazing an aluminum powder onto a plain aluminum surface. The …
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Effect of relative humidity on fatigue of anodized 2024-T351 aluminum in completely reversed torsion
… by other investigators. The aluminum oxide coating was grown on the metal substrate to two thicknesses (0.05 and 0.3 mils). One lot of specimens was polished to determine the effect of this type of surface finish. In all, a total of 108 specimens were run at various combinations of stress, …
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Laser induced emission spectrometry for rapid elemental analysis.
… are reported in detail for the first time. Coatings of zinc/nickel, tin, titanium nitride and chromium are examined. Depth profile signatures and crater shape are greatly influenced by operating conditions. Improved depth resolution and signatures are obtained using high laser energy and …
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Modeling and analysis of extrusion-spin coating : an efficient and deterministic photoresist coating method in microlithography
… of 5 [angstroms] for advanced chips. Spin coating is the prevalent coating method to produce the required thickness and uniformity, but it typically wastes over 90% of the photoresist applied. A more efficient method needs to be developed for two reasons. The first is that 80% of the …
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Corrosion studies on alpha tantalum and beta tantalum coated steel
Tantalum coating by sputtering, one form of physical vapor deposition (PVD), has been investigated as a replacement for chromium coatings on gun bores to protect them from erosion and corrosion due to its high ductility and high corrosion resistance in aggressive environments. When deposited as a …
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Investigation of Oxide Fiber/oxide Matrix Composites With a Weak Interphase
… A systematic study of the effect of interphase coating thickness on interface properties and pushout response was performed on two Al$\rm\sb2O\sb3$-matrix fiber model composites. The different pushout responses were distinguished by attributing them to the residual axial and radial stresses.
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An investigation into phenomena which influence the optimisation of ion plating systems
… a low pressure glow discharge to form solid coatings on negatively biased substrates. Although the method has gained commercial acceptance, particularly for engineering applications, much of the underlying science of the process is poorly understood. This work is concerned with investigating …
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Phenomena Associated with Individual Discharges during Plasma Electrolytic Oxidation
… and processing frequencies investigated. As the coating thickness increases, the characteristics remained broadly similar, although discharges become more energetic and longer-lived. Short PEO treatments were applied to existing PEO coatings in order to investigate the microstructural effects of …
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Investigating the heat treatment effects on phase transformations and coating morphology in the Cr-Pt coated system
… interest in the formation of Cr-Pt phases and coating morphology as a function of coating thickness and heat treatment parameters (temperature and time). The main aim of this research was to produce the coated system with properties which can be tailored according to the conditions required by …
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TRANSVERSE SUSCEPTIBILITY STUDIES OF RECORDING MEDIA
… was not performed. The determination of magnetic coating thickness after Sollis and Bissell[6] was extended to allow the measurement of AMP tapes. A computer model was developed to investigate the error in the technique due to the particulate nature of the coating. The results of the model …
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Corrosion resistant CMZP and Mg-Al2TiO5coatings for SiC ceramics
Thin film coatings of (Cao.6Mg0.4)Zr4(P04)6 (CMZP) and Mg stabilized AhTiOs ( Mg-Ah Ti05 ) on dense SiC substrates were investigated using sol-gel coating techniques. The thickness and quality of both CMZP and Mg-Ah Ti05 coatings were found to depend on the solution concentration and lift rate. …
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The effects of annealing on phase transformation in platinum-molybdenum coatings
… extended. RBS analysis showed an increase in coating thickness after annealing which has been attributed to the formation of the Pt-Mo phases.
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Tribological Investigation of Nickel Titanium Shape Memory Alloy (NiTi SMA) Coatings
Nickel titanium shape memory alloy (NiTi SMA) coatings demonstrate shape memory effects, superelasticity and excellent biocompatibility. It has been widely used in various applications such as in dentistry, orthopaedics and micro electro mechanical system. However, the application of NiTi SMA …
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A Nuclear Magnetic Resonance Approach Towards Understanding Surface Modification and its Influence on Ni-rich Layered Oxides in Li-ion Batteries
… this problem is surface modification with coating materials like Al<sub>2</sub>O<sub>3</sub> – cycling life is extended but the fundamental reasons behind the protection are not well understood. Therefore, the aim of the thesis is to identify the characteristics of coatings that contribute …
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Tribological characteristics of coatings on aluminium and its alloys
… an increasing interest in other treatments and coatings, on both aluminium and other base metals. The aim of this investigation is to explain the tribological performance and wear mechanism(s) of an uncoated aluminium alloy, four anodic coated alloys, and also an electroless nickel alloy. All of …
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I. Solubility and blend studies of nitrocellulose II. Relaxation properties of thin film coatings: the role of surface topography
… relaxation properties of thin film polysulfone coatings and the effect of substrate surface topography on these properties. Both dynamic mechanical and dielectric thermal analysis revealed that the topographical nature of the substrate influenced the linear viscoelastic properties of the thin …
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Probabilistic analysis of turbine blade durability
… and cooling convective parameters, metal and coating thermal conductivity and coating thickness. The durability life was modelled as limited by thermo-mechanical low cycle fatigue and creep. A nominal blade design as well as two additional variants were examined using deterministic and …
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Gas-phase synthesis of gold- and silica-coated nanoparticles.
… methods are investigated for producing gas-phase coatings of nanoparticles in an "assembly-line" fashion. Separate processes are developed to create coatings from silica and gold that can be used with a variety of core-particle chemistries. A photoinduced chemical vapor deposition (photo-CVD) …
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