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 “"Scanning electron microscopes"”.
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Design and characterization of diamond-like carbon coated kinematic contacts for improved coupling precision and wear resistance
… couplings in tools and instrumentation such as scanning electron microscopes (SEMs) where lubricants cannot be used. The experimental results from this experimental setup concluded that kinematic couplings coated with DLC contacts have a repeatability on the order of microns compared to steel …
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Efeito de múltiplos ciclos de solubilização sub-solvus delta e envelhecimento na microestrutura e propriedades mecânicas da superliga 718
… had its microstructures observed by optical and scanning electron microscopes with the identification of precipitates made by the morphologies. Grain size measurements, hardness measurements and tensile tests were performed. It was observed that δ precipitation at grain boundaries occurred, …
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Bacterial and chemical depression of pyrite in froth flotation of coal
… optically by binocular, reflected light, and scanning electron microscopes. The degree of dissemination of pyrite in the coal matrix was observed. Washability studies of Illinois No. 6, Pittsburgh, and Middle Kittanning coal seam samples were performed. The washability curves of these coals …
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Phase separation spinning of porous polypropylene hollow fibers
… studies. From observations made by optical and scanning electron microscopes, and mercury intrusion pore size distribution measurements, it was concluded that the structure of the fibers consisted of fine networks of interconnecting voids or pores. The significant majority of these pores had …
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A STUDY OF THE GROSS, MICROSCOPIC, ULTRASTRUCTURAL, AND COMPARATIVE ANATOMY AND DEVELOPMENT OF THE ARTICULAR SURFACES OF THE HUMAN SACROILIAC JOINT
… were also examined under the transmission and scanning electron microscopes. The sacroiliac joint angle and the relative lengths of the caudal and cephalad limbs of the joint were compared between species. On gross inspection, the sacral surface has the smooth, shiny, creamy-white appearance of …
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Investigation and Modelling of the Yarn Splicing Process
… fluid dynamics simulations, and the use of scanning electron microscopes. These approaches have been used together, to optimise splicer parameters and to investigate the airflow within the splicing chamber - the component which ultimately determines the splice structure. These techniques …
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Petrology and petrography of samples from two Algoa Basin cores
… photographed with both the Transmission and the Scanning Electron Microscopes. Thin sections of the arenaceous samples reveal that those which are carbonate cemented are relatively free from matrix, while those which are uncemented are matrix-rich. This latter situation can be ascribed to the …
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Synergistic Environmental Aging of Glass Reinforced Polymer Composites
… were examined after the tests using optical and scanning electron microscopes (SEM). Photodegradation of the polymer matrices was analyzed by Fourier Transform Infrared Spectroscopy (FTIR) techniques. A comparison of weight changes of polymer composites degraded by UVA and UVB was also …
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Scanning electron microscopy of the respiratory tract of cattle with shipping fever
Thesis (M.S.)--Michigan State University. Dept. of Pathology,
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SECONDARY ELECTRON SPECTROSCOPY INSIDE THE SCANNING ELECTRON MICROSCOPE AND ITS MATERIAL SCIENCE APPLICATIONS
The scanning electron microscope (SEM) is a powerful high resolution imaging instrument used in multiple fields of study today. The low energy scattered electrons inside it, used mainly for topographic image of a sample’s surface, contain valuable information in the emitted energy spectrum. In this …
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Fretting Fatigue Characterization of Steel Bolted Connections
… path were identified using optical and scanning electron microscopes (SEM). Forty-four specimens failed due to fretting fatigue in the middle plates; cracks initiated in the middle plates some distance away from bolt holes either at the stick-slip boundary or the contact edge, depending …
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Forensic Investigation of Stamped Markings Using a Large-Chamber Scanning Electron Microscope and Computer Analysis for Depth Determination
… This thesis focuses on using a large chamber scanning electron microscope to take secondary electron (SE) images of a stamped metal plate and analyzing them using the MIRA MX 7 UE image processing software for purposes of depth determination. An experimental peak luminance value of 77 (pixel …