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 48 for “"Glass-Ceramic"”.
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BSCCO superconductors processed by the glass-ceramic route
Glassy Bi-Sr-Ca-Cu-O (BSCCO) precursors were prepared by different melt-quenching methods to investigate the melt properties of the BSCCO system before the crystallization investigations were started. In order to fabricate superconductors having high critical temperature and current density using …
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Thermophysical properties of glass and glass-ceramic composites
… thermal diffusivity and conductivity of several ceramic composites were determined experimentally to observe the effect of temperature, heat treatment and orientation on these properties. The thermal conductivity and diffusivity of SiC whisker reinforced Ba-osumilite glass-ceramic exceeded that …
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Development of Lithium Disilicate Microstructure Graded Glass-Ceramic
… research was to create a microstructure graded glass-ceramic and investigate the resulting properties as a function of crystallization processing. The desired glass-ceramic was a lithium disilicate material that has a crystallization gradient across the sample, leading to functionally graded …
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Fabrication of glass-ceramic components via three dimensional printing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Test methods and analysis for glass-ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
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Testing and properties of high temperature glass-ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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Microstructural evolution and physical behavior of a lithium disilicate glass-ceramic
Background: Elucidating the lithium disilicate system like the popular IPS e.max® CAD (LS2), made specifically for Computer-Aided Design and Computer-Aided Manufacturing (CAD-CAM), as a function of temperature unravels new ways to enhance material properties and performance. Objective: To study the …
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Sodium sulfate corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composites
… fiber-reinforced lithium aluminosilicate (LAS) glass-ceramic matrix composite was studied using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). Changes in the microstructural chemical composition of the specimens were investigated. The samples provided by Naval Air Warfare Center …
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Effects of crack-crystallite interaction on the fracture behavior of a cordierite glass-ceramic
… in a model brittle composite, a cordierite glass-ceramic. Microstructural effects associated with the repropagation of the introduced flaws under the imposition of a mechanical load were also examined. Two general types of crystallized microstructures were investigated for samples …
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Optical properties Of CAD-CAM lithium disilicate glass-ceramic in different firing temperatures and thicknesses
… IPS e.max® CAD lithium disilicate (LD) glass-ceramic material has become one of the most popular esthetic restorative materials in digital assisted dental esthetic restoration. The mechanical and optical properties of this material have been investigated in several studies. However, …
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Revealing the Invisible: Examining Contemporary Social, Economic and Political Realities through Sculptural Media (Glass & Ceramic)
This thesis is a practice-led research project that investigates how socio-political themes like status-driven economics, mass surveillance, media manipulated and simulacra saturated societies of today, can be examined through sculpture. It explores ways to reveal contemporary social structures and …
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Study on preparation of high performance CaO-MgO-Al2O3-SiO2 system glass-ceramic with industrial by-products
… was intended to prepare high performance glass-ceramics from these three industrial by-products. What's more, two energy saving methods were put forward. One was application of single-stage heat treatment, another was mixing cold solid raw material (IOT, CFA) with melted BFS discharged at …
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Damage analysis and mechanical response of as-received and heat-treated Nicalon/CAS-II glass-ceramic matrix composites
Experimental results of damage development in and mechanical response of heat-treated NicaloniCAS-II laminates subjected to monotonic flexure and axial loading and to cyclic tensile loading are reported. The specimens were subjected to post-processing heat treatments at 900°, 1000°, and l100°C in …
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Cooking system interactions: compatibility of energy source and container material
… element, and electric resistance coil under glass-ceramic. The container materials investigated include: thin gauge aluminum, heavy gauge aluminum, glass-ceramic, thin gauge porcelain-on-steel, and heavy gauge stainless steel with thick aluminum heat core. Crepes were prepared to determine …
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Synthesis and characterization of in situ whisker-reinforced glass-ceramics
… on mechanical and thermal properties of glass-ceramics in the Li₂O-Al₂0₃-P₂0₆-Si0₂ system were investigated. When Ti0₂ whiskers, having an average aspect ratio of 28, are precipitated from the glass-ceramic matrix, …
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Development of novel micaceous glass ceramics for dental applications using CAD/CAM Systems
… was to develop and characterise machinable glass-ceramic materials for dental applications with the final outcome of producing a range of materials matching tooth enamel for aesthetics and mechanical properties. The candidate glass is a micaceous glass-ceramic which is compositionally based …
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Fabrication, Kinetics and Crystallography of Lithium Disilicate Glass-Ceramics
… aspects of investigations on lithium disilicate glass-ceramics, namely, fabrication, kinetics, and crystallography. One of the objectives is to fabricate a high-strength glass-ceramic in complex lithium disilicate glass systems for dental restorative applications by means of compositional design …
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Consumers' knowledge, practices, and satisfaction with cooking systems' interaction
… element, and halogen and electric coil under glass ceramic) and six types of cookware (glass ceramic, porcelain enamel-on-aluminum nonstick, stainless steel with an aluminum disk, heavy gauge aluminum, thin gauge aluminum, and heavy gauge aluminum with non-stick finish) formed 30 cooking …
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Crystallization of Lithium Disilicate Glass Using Variable Frequency Microwave Processing
The lithium disilicate (LS2) glass system provides the basis for a large number of useful glass-ceramic products. Microwave processing of materials such as glass-ceramics offers unique benefits over conventional processing techniques. Variable frequency microwave (VFM) processing is an advanced …
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Aesthetic Result of Ceramic Restorations with Different Cements.
… this study is to assess the aesthetic outcome of glass ceramic restorations of various thicknesses cemented to composite resin substrates of different shades with multiple cements. 120 samples of IPS e.max® CAD (HT) (Ivoclar Vivadent, Schaan, Liechtenstein) lithium disilicate ceramic and 120 …
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