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 290 for “"Densification"”.
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Vibration-induced densification of granule materials
… the experiments to facilitate the observation of densification trends with mono-disperse acrylic spheres and multi-disperse polyethylene pellets. For mono-disperse acrylic spheres, four densification trends are found at different vibration conditions, and attaining the "maximum density" is closely …
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Densification and Mechanical Properties of Nanocrystalline FeAl
Impression creep measurements were performed on nanocrystalline FeAl specimens sinterforged to full density. The tests were conducted over the temperature range of 500--600°C, and using punches with diameters of 0.5 and 0.2 mm. For specimens sinterforged at 500°C, a decrease in creep rate …
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Over Growth: a metabolic densification of Cape Town
… densified especially in developing countries2. Densification, and the associated growth, provides many social and cultural benefits, but can lead to increased pollution, environmental degradation, the destruction of existing urban fabric, a lack of greenery, a lack of light to street level, …
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Pressureless Densification of Alumina - Titanium Diboride Ceramic Matrix Composites
… determine diffusion mechanisms responsible for densification behavior of SHS produced Al2O3/TiB2 Ceramic Matrix Composites (CMCs). Previous research has shown SHS produced Al₂O₃/TiB₂ composites exhibited unique microstructural properties that contributed to high strength, fracture toughness, and …
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Classification and Densification of Municipal Solid Waste for Biofuels Applications
… a feedstock for conversion to biofuels. And if densification of MSW is a feasible process to integrate into waste disposal systems in Canada. These topics were addressed through a comprehensive review of classification of MSW in Canada with focus on suitability for biofuels development and a …
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Improvement of 5G performance through network densification in millimetre wave band
… we have introduced 5G network based on network densification. Network densification includes densification over frequency through mmWave, and densification over space through higher number of antennas, Higher Order Sectorisation (HOS), and denser deployment of small-cells. Our results show that …
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The Densification of Historic Districts: Applying Metabolism to the Cast Iron
<p>Due to the natural borders that limit the expansion of Manhattan,an estimated ten percent increase in New York City population over the next twenty years will constrict the island’s developable land and threaten low-population/under-developed areas, which include a portion of the fifty-two …
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Design and fabrication of a tapped densification apparatus for bulk solids
Experiments are commonly used to ascertain the flow properties of bulk solids. One such property is a measurement quantity known as the tapped density. Here, a container of granular material is subjected to a long sequence of discrete taps, after which the bulk density - the total mass divided by …
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Low-Temperature Densification of Lead Zirconate Titanate With Vanadium Pentoxide Additions
… zirconate titanate (PZT) ceramics promoted rapid densification below 975(DEGREES)C, thereby eliminating the need for PbO atmosphere control. The base PZT, Pb (Zr(,0.53)Ti(,0.47))O(,3), was prepared by coprecipitation from mixed oxides and butoxides. V(,2)O(,5) was incorporated as mill additions to …
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Densification and cyclic triaxial testing of Leighton-Buzzard 120/200 sand
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
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Computational modeling of the densification of silica glass under shock loading
… permanent reduction in volume. The permanent densification of glass serves as a mechanism for the material to absorb large amounts of energy under pressures potentially achievable during ballistic loading. This ability has recently garnered interest in glass as a candidate material for …
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Modeling Heat Transfer and Densification during Laser Sintering of Viscoelastic Polymers
Laser sintering (LS) is an additive manufacturing process which uses laser surface heating to induce consolidation of powdered materials. This work investigates some of the process-structure-property relationships for LS of viscoelastic polymers. A one-dimensional closed-form analytical solution …
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Rethinking New Delhi : design studies on the densification of a colonial city
… city through a series of design studies on the densification of the colonial city. It deals with urban form and its implications. While the stated goal of the Master Plan has been to achieve a more equitable distribution of densities in this core, the reasons for densification, who it is to …
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Catalytic properties, densification and mechanical properties of nanocrystalline yttria-zirconia-based materials
… commercial TOSOHC powders. Grain growth during densification of TOSOH© powders was successfully suppressed by presintering to 93% density under an argon atmosphere, followed by hot isostatic pressing at a temperature lower than the presintering temperature. The grain sizes of dense 3YZ and 8YZ …
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Densification, microstructure, and mechanical properties of zirconium diboride based ultra-high temperature ceramics
… of this dissertation was aimed at studying the densification of ZrB₂ ceramics by pressureless sintering techniques. Various processes have been applied to coat ZrB₂ powders with polymer precursors, which were used to produce C after charring. After sintering at 1900⁰C, relative density increased …
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The effect of surface wettability on frost growth and densification on flat plates
… and surface temperature, frost growth and densification rates on cold, flat surfaces subject to forced convective heat and mass transfer depend on surface wettability and cooling rate during the condensation phase. If the cooling rate is high during the condensation phase, then the droplet …
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Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate
… substrates to which the porous body adheres. The densification behavior of zinc oxide and cordierite-base crystallizable glass constrained on a rigid substrate was studied to add to the understanding of the behavior of various materials undergoing sintering when subjected to external substrate …
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Density and design: the impact of urban densification on design qualities in residential neighbourhoods
This study is focused on the concept of urban intensification, investigating the costs and benefits of higher density urban development. It attempts to define the exact physical patterns and spatial characteristic of the density of residential urban areas in order to establish the extent to which …
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