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 91 for “"preferred orientation"”.
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The lattice preferred orientation of olivine in Beni Bousera Ultramafic Massif, Morocco
… as areas of focused melt percolation. Lattice preferred orientation (LPO) of olivine crystals from a sample transect across one of these zones was analyzed in comparison with LPO from the surrounding host lherzolite and harzburgite. The LPO from peridotites within the zone was slightly …
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Plagioclase preferred orientation in layered mylonites : evaluation of flow laws for the lower crust
… and the presence or absence of a lattice preferred orientation (LPO). Our analyses indicate that mylonite layers deformed at a strain rate in the range of 10-12 to 10- 11 s-1, while coarse-grained gabbro deformed at a strain rate of approximately 10-14 to 10- 13 s-1. Plagioclase in pure …
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An experimental and theoretical investigation of the preferred orientation in deformed and recrystallized hafnium
<p>"The research problem, as presented, therefore became two-fold; first to investigate and determine the feasibility of fabrication of hafnium and secondly to study the deformation characteristics of the material in light of the overall study of hexagonal metals aimed at the development of an …
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Plagioclase preferred orientation in the layered mylonites : evaluation of flow laws for the lower crust
… and the presence or absence of a lattice preferred orientation (LPO). Our analyses indicate that mylonite layers deformed at a strain rate in the range of 1012 to 101 s-1, while coarse-grained gabbro deformed at a strain rate of approximately 10-14 to 1013 s-1. Plagioclase in pure …
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Investigation by neutron diffraction utilizing white neutron radiation
… of various silicon steel samples of different preferred orientation. A method is described by which the preferred orientation of samples may be easily determined. This method involves analysis of maxwellian distributions and rocking crystal curves for various important sample directions, e.g., …
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A Study of Acoustic Velocity and Dielectric Permittivity Anisotropy in Relation to Finite Strain in Deformed Rock
… been calibrated against the degree of preferred orientation of phyllosilicate minerals which is then used independently as a strain measure. Velocity of propagation of acoustic waves and dielectric permittivity were measured for samples from the quarry and then compared with strain …
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Microstructural study of two-phase marbles in simple shear
… rate of 10 -4 s -1. The microstructure, shape-preferred orientation (SPO), grain aspect ratios, lattice-preferred orientation (LPO), dislocation densities, and grain sizes were compared to the results of other studies on similar carbonates deformed in triaxial loading, torsion, and simple …
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Microstructural and crystallographic fabric analysis of stretched-pebble conglomerates in central Vermont
… the development of microstructures and lattice preferred orientations to the local and regional structural settings. Additionally, the study compares the development of microstructures and lattice preferred orientations, and investigates strain heterogeneity that develops within deformed …
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Role of low-energy ion/surface interactions in controlling microstructure and texture evolution during film growth
… have dense columnar microstructures with (111) preferred orientation (PO). IMSD layers exhibited competitive column growth showing an order of magnitude higher degree of (111) orientation with much smaller azimuthal spread. The IMSD films were tensile while the CMSD films were slightly …
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Phase development and texture for lead-based perovskite thin layers prepared by sol-gel processing
… terms of crystal structure, microstructure, and preferred orientation. Ferroelectric La-modified Pb(Zr,Ti)O$\sb3$ (PLZT) and antiferroelectric PbZrO$\sb3$ (PZ) were chosen as materials which could be potentially used in integrated devices, including, sensors, actuators, and memory applications. …
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Phase Composition, Microstructure, and Physical Properties of Poly- and Single-Crystal Tantalum Nitride Layers
… single texture dominates at t ≳ 200 nm. The preferred orientation of 500-nm-thick Ei = 20 eV layers can be selectively and continuously varied from predominantly underdense 111 to nearly complete dense 002 by varying ion-to-Ta flux ratio Ji/JTa from 1.3 to ≥7.4. The change in texture is …
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Nanostructural, Surface Morphological Evolution, and Physical Properties of Sodium Chloride-Structure Titanium Nitride and Titanium Cerium Nitride Layers as a Function of Composition
… dense, atomically smooth, and have strong 002 preferred orientation with low stress.
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Using molecular approaches to understand Complex I deficiency in mouse models
… the problems of limited sample concentration and preferred orientation are described. Grids were modified with graphene, graphene-oxide, polylysine and thiol-PEG; improved numbers of particles could be observed using very low protein concentrations, although with preferred orientation and partial …
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DLC Thin Film Assisted ZnO Nanowires Growth
… the NWs were single crystalline with c-axis preferred orientation (lattice parameter c = 0.519 nm). From our experiment results, a ZnO polycrystalline layer forms first and then ZnO NWs grow on top of it. The NW has two sections. The bottom section has wider diameter of 100nm ~ 1 , and the …
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Quantifying collagen-based biological tissues using Fourier-transform-second-harmonic generation imaging
… Via 3D FT-SHG, quantitative metrics such as orientation isotropy and preferred orientation can be extracted readily from SHG images. This thesis is going to demonstrate the utility of 3D FT-SHG by apply it to three different biological tissues: porcine tendon, porcine sclera, and rat cervix.
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Broken-formations of the Pulaski thrust sheet near Pulaski, Virginia
… and dips of axial surfaces, (3) a low degree of preferred orientation of folds and faults, (4) an increase in the frequency of mesoscopic structures, and (5) the presence of Max Meadows tectonic breccia. Structural analyses indicate that deformation in the broken-formations is Alleghanian in age …
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Neural responses to relative motion in V1 and V2 of macaque monkeys
… boundaries matching a cell's preferred orientation evoke excitatory responses in a relative motion sensitive neuron. However, the responses are not strong enough to make such a neuron selective to the orientation of the relative-motion-defined boundaries. Relative motion …
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Solid Phase Crystallization of Vanadium Dioxide Thin Films and Characterization Through Scanning Electron Microscopy
… and films of isolated single-crystal particles. Orientation Imaging Microscopy (OIM) was used to characterize and study the phase and the orientation of the vanadium dioxide crystals obtained, as well as to diferentiate them from other vanadium oxide stoichiometries that may have formed during …
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