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 11 of 11 for “"surface profilometry"”.
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Highly doped semiconductors for plasmonic waveguides and flat-composite gratings
… transform infrared spectroscopy and microscopy, surface profilometry, and infrared emissivity measurements. Samples show strong diffraction from 1D arrays of 'metal' lines patterned using the spin-on dopants.
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The abrasive wear behaviour of mineral-filled polypropylene
… wear conditions with specific emphasis on the surface property of scratch resistance. The experimental work has covered the effect of polymer crystallinity, mineral fillers, and the nature of the abrasive counterface on the wear behaviour of polypropylene. The wear behaviours of …
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Stress and fatigue analysis of SVI-tested camshaft lobes
… microscopy, acoustic microscopy (SAM), and profilometry were used to characterize wear and fatigue, crack depth, and surface roughness, respectively. Results show cracking to occur mainly in the opening ramp of the most abusively ground cam lobes. No clear evidence was found for subsurface …
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Miniaturized 3--D Mapping System Using a Fiber Optic Coupler as a Young's Double Pinhole Interferometer
Three--dimensional mapping has many applications including robot navigation, medical diagnosis and industrial inspection. However, many applications remain unfilled due to the large size and complex nature of typical 3--D mapping systems. The use of fiber optics allows the miniaturization and …
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Laser Processing of Metals and Polymers
… that can lead to melting, vaporization, or just surface modification. Nowadays laser systems can be found in nearly all branches of research and industry for numerous applications. Sufficient evidence exists in the literature to suggest that further advancements in the field of laser material …
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DC magnetron reactive sputtering of low stress AlN piezoelectric thin films for MEMS application
… diffractometry, spectroscopic ellipsometry, and surface profilometry. Optimization of film deposition parameters improved AIN film properties in the MEMS sensors. Film property characterization using response surface methodology indicated microstructural changes due to sputtered particle …
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The tribological behaviour of glass filled polytetrafluoroethylene(PTFE) under dry and water lubrication
… purposes as well. The worn polymer pin surfaces and the counterfaces were studied by means of optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EOS), x-ray photoelectron spectroscopy (XPS) and surface profilometry. X-ray diffraction (XRO) and …
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The Design, Build and Validation of a Realistic Artificial Mouth Model for Dental Erosion Research
… samples preloaded on the system to be tested for surface characteristics (i.e. surface hardness and surface profilometry) to determine the extent of erosion if any. The model also allows the resultant solution to be analysed for traces of calcium and phosphate ions. To validate the capabilities of …
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Fluid Dynamics and Surface Pressure Fluctuations of Two-Dimensional Turbulent Boundary Layers Over Densely Distributed Surface Roughness
… of three-dimensional densely distributed surface roughness. A 3-velocity component laser Doppler velocimeter was used to measure instantaneous velocities. These measurements permitted an independent estimate of skin friction on the surfaces using a momentum balance approach, and the …
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Material development and characterization for high salinity water for desalination by membrane distillation at high temperature and pressure
… SEM (Scanning Electron Microscopy), and surface profilometry. Results indicate that the majority of carbon materials tested maintain their original physical and chemical properties after exposure to supercritical water in the absence of dissolved oxygen. However, under oxic conditions, a …
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Iatrogenic Electrocautery Damage and Cellular-Based Corrosion of Total Joint Arthroplasty Biomaterials
… by inflammatory cells attacking the implant surface. The purpose of this thesis is to identify to what degree Electrocautery damage can alter the implant surface and if inflammatory cells are able to alter the implant surface and ingest metal particles.</p> <p><strong>Methodology.</strong> To …