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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 59 for “"Non-metallic"”.
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Non-metallic nanostructures for light-driven chemistry and catalysis
… Cu) nanostructures display a remarkable phenomenon: under excitation by visible wavelengths of light, their free electrons undergo collective oscillations known as localized surface plasmon resonance (LSPR) oscillations. This effect has been harnessed both for harvesting visible light and for …
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The grinding of leather and other non-metallic materials
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1952.
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Non-metallic cold-cathode electron emission from composite metal-insulator microstructures
… uncoated, dielectric-coated and composite-coated metallic cathodes. An optical imaging technique has been used to observe and characterize the spatial and temporal behaviour of the populations of emission sites on these cathodes under various experimental conditions, e.g. pulsed-fields, gas …
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FABRICATION AND CHARACTERIZATION OF 3D PRINTED METALLIC OR NON-METALLIC GRAPHENE COMPOSITES
… the spider body and the manufacturing of metallic and non-metallic graphene composites. The spider body is investigated in different sections of the exoskeleton and specifically the fangs. The study involves the mechanical characterization of the single components by the nanoindentation …
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Development of REBCO Tapes on Non-Metallic Flexible Substrates for RF Applications
… work aims to develop REBCO on inexpensive and non-metallic flexible substrates for RF applications. Two methods have been developed in this work—exfoliation and transfer and direct growth. In the exfoliation and transfer method, the metallic substrate was peeled away from a standard 2G-HTS tape …
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Surface Extraction of Non-Metallic Minerals in Ontario Southwest of the Frontenac Axis
Made available in DSpace on 2014-12-09T18:29:32Z (GMT). No. of bitstreams: 1 6604145.pdf: 10249054 bytes, checksum: 68f0594e08d398d8dc20e10e040bf624 (MD5) Previous issue date: 1965
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Sustainable methodologies to transform non-metallic printed circuit boards waste into value-added products
… more than 28-30% metal. While recycling, the metallic elements are dismantled and reused for its material value, however non-metallic elements are left untreated because of its complex amalgamation. This unprocessed non-metallic waste PCB is either incinerated or landfilled leaving all the …
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The effect of non-metallic particles on as-cast austenitic structure of low carbon steel
The effect of second-phase particles and cooling rate on the as-cast austenite grain size of peritectic plain-carbon steel has been examined. Remelting tests followed by continuous cooling and helium quenching were performed on a Gleeble 1500 Thermo mechanical Simulator. Two low alloy types of …
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The application of positron emission particle tracking to study non-metallic inclusions in metal castings
To improve the efficiency of turbine aero engines, higher operating temperatures and weight savings are being investigated. Alloys such as RR1000 are being trialled as they perform better at higher temperatures than current nickel-based superalloys. To achieve weight savings, inertia welding is …
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Determination of creep, fatigue and ageing characteristics of non-metallic strength members in optical communication cables
… performances of four commercial brands of non-metallic continuous multi fibre strength member yarns, and one jointed non-metallic multi fibre strength member yam. The main materials under investigation were two commercial brands of the para aramid polymer yarn polyparaphenylene …
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A study of the microstructural basis for the strength and toughness properties of overaged HSLA-100 steel
… The size, distribution, and composition of non-metallic inclusions were also determined; the inclusion population generally consisted of small, globular, homogeneously dispersed particles. However, exogenous oxides on the order of 50 um were occasionally found as well as slightly brittle …
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Some aspects of crack initiation in mild steel subjected to fatigue stressing in a corrosive environment
… enriched band of ferrite exists around the non-metallic inclusions and corrosion occurs in this contaminated band with and without applied stress. Cyclic stress enhances the formation and coalescence of micropits at and around the inclusions leading to the nucléation of cracks. Preferential …
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Pressure Induced Quantum Phase Transitions in Metallics Oxides and Pnictides
… when the competition is between insulating and metallic ground states. Metal-insulator transitions are studied by means of electronic transport measurements and quantum critical points are approached by applying hydrostatic pressure in two different compounds namely Eu2Ir22O 7 and FeCrAs. The …
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Investigation into the mechanism of acicular ferrite nucleation in steel weld metal
… was discovered. Acicular ferrite forms on non-metallic inclusions found within the weldment and when significant amounts are "grown", the weldment's toughness and strength approaches that of the steel-base plate. Unfortunately, the mechanism by which high level of acicular ferrite is …
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Meniscus Controlled Three-Dimensional Nanofabrication
… deposition within a nanoscale liquid meniscus. Metallic as well as non-metallic nanowires with extremely high aspect-ratios and three dimensional nanostructures such as freestanding metallic interconnects can be fabricated by these techniques at desired locations. Continuous fabrication at high …
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A microstructural examination of duplex ferrite -martensite corrosion resisting steels
… annealing. The type and distribution of non-metallic inclusions occurring in 3CR12 has also been assessed. Characteristic fracture modes developed during impact testing have been related to the grain morphology and the occurrence of non-metallic inclusions. It is shown that splits form …
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BODY TENSOR FORMALISM IN FINITE DEFORMATION ELASTICITY AND APPLICATION TO THE TORSION OF A CIRCULAR CYLINDER
… the torsion problem leads to a new second order non-linear differential equation which is valid to all orders in the torsion parameter. When linearized this equation can be solved to the first two orders in a dimensionless torsion parameter.</p><p>Using the values of the third order elastic …
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Implementing postponement into low-volume/high-variability manufacturing
… that can be used across various materials, both metallic and non-metallic. This methodology guided implementation of postponement through material physical form consolidation, material substitutions, and even provided insight into which manufacturing technique given a particular material form is …
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