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 32 for “"Refractory Materials"”.
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Revealing Refractory Materials on Trans-Neptunian Objects and Centaurs via Reflectance Spectroscopy
… investigated to determine whether silicates and refractory organics, which are predicted to be present on their surfaces, could be directly detected via the presence of their characteristic absorption bands. Most of the objects observed exhibit reflectance spectra typical of TNOs, without …
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Evaluation of the theta pinch as a sampling and excitation source for elemental analysis of solid refractory materials
… and excitation source for elemental analysis of refractory solids. Previous work demonstrated the ability of the discharge to produce spectra suitable for qualitative analysis, but quantitation could not be demonstrated due to insufficient and irreproducible sampling. It was deemed necessary to …
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Finite element simulation of creep behavior in enhanced refractory material for glass furnace
… partial pressure that hasten the corrosion of refractory materials, particularly in silica refractories. Thus, the refractories used in the oxy-fuel-fired furnace are subjected to high temperatures and stresses during its service life. Considerable creep could occur in the furnace, if the …
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Design, construction and testing of a pumped molten chloride circulation loop
… the present work investigates the use of refractory materials instead of nickel alloys. This thesis presents the design, construction and testing of a laboratory-scale pumped circulation loop made of refractory materials to circulate molten chloride salt above 700 °C. The components of the …
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ICP Analysis of Solids/Waste Slurries
… trace elements in coal, coal ash, cements, and refractory materials. In this study aqueous slurries of 6 coals were prepared by milling with a stirred-ball slurry attritor mill and an air impact pulverizer. ICP analysis values obtained for the six coals by the two different grinding methods were …
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Ceramic coatings for silica and sapphire optical waveguides for high temperature embedding and sensing
… in harsh environments, other appropriate coating materials have to be used. This thesis examines various refractory materials as candidate coating materials. Coating materials should not react chemically with the waveguide material but should have matching thermal expansion coefficients. …
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PLASMA SPECTROCHEMICAL ANALYSIS OF SLURRIES
The analysis of ores, minerals and refractory materials by slurry atomisation has been investigated using inductively coupled plasma and direct current plasma-atomic emission spectrometry (ICP-AES, DCP-AES) and inductively coupled plasma-mass spectrometry (ICP-MS). Aqueous calibrants were used. …
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Utilization of Sodium Flame Synthesis for the Formation and Deposition of Pure Metal Materials for Applications in Additive Manufacturing
… such as high temperature alloys, ceramics, and refractory materials have become a key area of focus for expansion in the realm of additive manufacturing. Factors such as high melting points, material homogeneity, and physical properties such as ductility limit the application of popular additive …
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Modell zur Beschreibung der Trocknung von Feuerbetonen
… investigations about the drying process of refractory concrete are of interest for the refractory industry, whose world-wide sold products are mainly used in the steel industry. In the recent years a considerable amount of refractory companies replaced their products with new technology: …
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Nano Vacuum Channel Devices for Electronics and Ultrafast Nanophotonics
… to pattern planar NVC devices using metallic and refractory materials. Their emission properties in response to both electrical and optical fields are investigated through simulation and testing. Finally, their use for electronics and optoelectronics applications is demonstrated and discussed. In …
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Surface wave techniques for the study of engineering structures and materials
… to the measurenent of the elasticities of refractory materials at high temperatures. In the experimental study of the high order in-plane resonances of thin disks it was found that the energy travelled at the edge of the disk and this initiated the work on one dimensional Rayleigh …
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Flame Assisted Additive Manufacturing for the Synthesis of High-Temperature Materials
… technology for producing high-temperature materials non-traditionally, offers a promising solution. This method enables 3D printing of materials that can withstand high-temperature environments, which are crucial in nuclear reactions and aerospace applications. Additive manufacturing offers …
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Synthesis and indentation of boride and carbide coated carbon nanotube composite microstructures
… the synthesis 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 …
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Optical absorption and anisotropy of refractory oxides fabricated by ion-assisted deposition and ion plating.
… two important members of the class of high index refractory materials: Tantalum pentoxide and Titania are investigated. These materials are known to produce very high quality films. Ion plating of tantalum results in the extremely high quality films, but ion plating of titania results in films …
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Characterization of carbon nanoclusters produced by arc-discharge
… by the present results. The reaction of foreign materials with carbon vapor in the arc results in their encapsulation into carbon cages, as well as the formation of other novel forms of carbon nanoclusters. Among more than eighteen elements introduced into the discharge in this study, B, Y, Zr, …
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Experimental determination of the phase equilibrium in the Cu-O-ZnO-SiO2-CaO-MgO system
… ores and secondary scraps in their feeding materials. The smelting of complex materials is always accompanied by the formation of large amount of slag. Impurities in the feeding materials will be oxidized during the smelting process, and those oxides will form the slag phase together with …
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Determination of progressive corrosion of clay flux blocks
… investigators to ascertain the useful life of a refractory product before its use in the furnaces, but the problem is so complex that even after decades of research work by the research engineers and technologists a satisfactory and easy test which may not be only of very long duration but also …
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