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 14 of 14 for “"Metal coating."”.
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Applications of optical fiber sensors with thick metal coatings
… fiber optic sensor design which employs a thick metal coating to retain information regarding the strain history of a sensor is demonstrated. Additionally demonstrated is a corrosion sensing technique which exploits the residual strain retention of the post-damage inspection sensor. Finally, the …
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An Investigation of Wear-Resistant Coatings on an A390 Die-Cast Aluminum Substrate
In this investigation, four coatings were tested for their ability to increase the wear life of A390 aluminum primary clutch sheaves used in continuously variable transmission (CVT). The coatings tested were: hard chrome, electroless nickel metal, hard coat anodizing and composite ceramic coating. …
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Silicon nano-structure fabrication and application for surface-enhanced Raman spectroscopy
… by severalfold even when using 66% less noble metal coating. We investigated the length gradient dependence and asymmetric properties of SERS effects for slanted nano-pillar with polarized excitation. This versatile and angle-controllable nano-pillar fabrication and monolithic 3D …
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Carbon nanotube based electromechanical probes
… for future probing applications. A new class of metal-CNT hybrid electromechanical probes is presented where vertically aligned carbon nanotube structures, grown with a chemical vapor deposition (CVD) technique, act as elastic springs, and a metal coating on the probes is used for increased …
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Creating Complex Hollow Metal Geometries Using Additive Manufacturing and Metal Plating
… process to produce complex, hollow, metal geometries. The developed process uses electroless nickel plating on laser sintered parts that then undergo a flash burnout procedure to remove the polymer, leaving a complex, hollow, metal part. The resulting geometries cannot be produced …
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The Development and Evaluation of Novel Techniques for the Study of Polymerisation and Degradation Reactions
… initiated olefinic polymerisation reactions in a metal coating application. The ultimate aim of this work is to harness reactions of this type, which are potentially very fast, to obtain a polymer system capable of undergoing rapid cross linking reactions in thin film. The development and …
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Application of Phase Change Material to Improve Adiabatic Compressed Air Energy Storage System
… could crack the shell of the microcapsule, a metal-coating process, well-described in the thesis, is applied to prevent cracking of the polymer shell of the microcapsules and to improve their stability. Also to have a better understanding, two different PCMs are applied in this research: …
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Mathematical modelling of an annealing furnace
The metal coating line at New Zealand Steel relies on a large electric radiant furnace to heat steel strip before hot-dip galvanising in a continuous process. The temperature evolution of the strip inside the furnace is vital in ensuring the speci ed mechanical properties are achieved for a range …
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Experimental and theoretical characterisation of tunable fibre gratings
… a new kind of double section LPG fabricated on a metal-clad coated fibre is reported. The fabrication of the device is made easier by directly writing the grating through the metal coating. This device may be used to overcome the recoating problems associated with standard LPGs written in …
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The study of weak ferromagnetism by andreev reflection spin spectroscopy and development of bimorph electro-thermal actuators
… freestanding Si3N4 microstructures with coating of Au or Ag or Ni showed torsion while passing dc current. The quadratic dependence of the torsion angles with the dc current were measured and such effect was accounted for the Joule heating of the metal coating and the residual strain of …
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Characterization and control of the nonlinear optical properties of dendritic silver nanoparticle clusters
In this dissertation, the properties of the energy transport in thin films of silver nanoparticles on dielectric surfaces are explored. Specifically, this dissertation will present experiments in which an ultrafast laser (~ 13 fs) centered at 800 nm is focused at normal incidence on a thin film of …
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Effects of a Surface Engineered Metallic Coating on Elastomeric Valve Stem Seal Leakage
… to assure proper sealing. In this research, a metallic coating was applied as a lubricant using a vacuum vapor deposition process to the surface of elastomeric valve stem seals. Valve stem leak measurements were taken to determine if the coated O-rings, alone or with the recommended …
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Enhancement of the UV emission in metal nanoparticle-coated ZnO
… been reported, due to the presence of a surface coating of either Au or Al nanoparticles. Two significantly different models have been proposed to explain the observed increase in the UV light output. One involving the decay of metal nanoparticles localised surface plasmons (LSP) into hot …