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Showing 1 to 20 of 116 for “"synchrotron x-ray"”.
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Chemical analysis of polymer blends via synchrotron X-ray tomography
… polymer blends are of great importance. X-ray tomography has been used to obtain spatial chemical information about various polymer blends. The spatial images are acquired with synchrotron X-ray tomography because of its rapidity, good spatial resolution, large field-of-view, and elemental …
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Three Dimensional Characterization of Deformation Twins Using Synchrotron X-Ray Diffraction
… novel experimental technique, three-dimensional synchrotron X-ray diffraction, on two different HCP metals and acquire a statistical data that can help us understand fundamentals of deformation twinning. After a literature review in chapter two, the steps used for preparing samples, conducting …
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Data-driven Synchrotron X-ray Microscopy Characterization of Functional Thin Films
… storage, catalysis, electronics, and optics. Synchrotron X-ray microscopy offers spatially resolved, elementally sensitive mapping of materials structure at the nanoscale. Nonetheless, traditional data analysis methods struggle to process the high-dimensional datasets efficiently and …
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Structural studies using synchrotron X-ray powder diffraction and other techniques
Chapter 1 gives an introduction to X-ray and neutron powder diffraction and the use of these techniques for crystal structure determination and refinement. The Rietveld structure refinement method is described and examples of different methods of structure determination from powder diffraction data …
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Single-Cell Measurements of Element Concentration In Phytoplankton Using Synchrotron X-Ray Fluorescence
… cells present in natural particle assemblages. Synchrotron x-ray fluorescence (SXRF) is a microanalytical technique used for the localization and quantification of elemental distributions. This technique enables quantitative and qualitative analysis with high spatial resolution (< 1 µm) and high …
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In-situ Study of Single Pharmaceutical Granule Drying using Synchrotron X-ray Imaging
… granules. Comparatively, the use of in-situ synchrotron X-ray imaging techniques allows for fast processes such as single pharmaceutical granule drying to be visualized due to the higher photon flux, good stability, and higher spatial and temporal resolutions that lead to a much faster method …
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Synchrotron X -Ray Scattering Studies of Local Fluctuations in Lead Magnesium Niobate Relaxor Ferroelectrics
Temperature dependent synchrotron x-ray diffraction studies of PMN-PT single crystals confirmed the existence of anti-ferroelectric fluctuations produced by correlated atomic displacements using state-of-the art experimental facilities. Detailed quantitative analysis of the corresponding …
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Synchrotron X-ray scattering studies of novel phase transitions in systems with coupled order parameters
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Electronic properties and surface chemistry of vanadium oxide systems: New insights from synchrotron X-ray techniques
… two perspectives in mind, using complementary synchrotron X-ray spectroscopy techniques to investigate their chemistry inside and out. With an aim to expand the limited range of experimental density of states measurements on doped VO2, V L2,3 and O K edge X-ray absorption spectroscopy (XAS) and …
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Tensile behavior analysis on neutron irradiated Fe-Cr-C alloys using in-situ synchrotron X-ray and micromechanics modeling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Investigation of new synchrotron X-ray and neutron techniques for local crystallographic analysis of Ni-based single crystal superalloys
… difficult. To address this, a series of synchrotron X-ray, and neutron diffraction studies were conducted to explore the possibility of more reliable lattice misfit determination and how it varies across the microstructure as well as during deformation. Firstly, a monochromatic …
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Interface Structure Studies of Copper Thin Films on C-Plane Sapphire by Crystal Truncation Rod Analysis Using Synchrotron X-Ray
Thin films were grown by UHV-MBE technique. The substrates underwent two different heat treatments prior to Cu deposition. One substrate was annealed in air at $1500\sp\circ$C for 3 hours followed by an anneal in UHV at $1200\sp\circ$C for 30 minutes prior to Cu deposition. The other substrate was …
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Raman Spectroscopy and Synchrotron X-ray Diffraction Study of Lunar and Terrestrial Plagioclase Feldspar at High-Pressure and High-Temperature Conditions
… using laser heating diamond anvil cell and synchrotron X-ray diffraction. Results reveal pressure/temperature-induced amorphization and crystallization kinetics of high-pressure phase changes. The phase diagram of intermediate plagioclase was constructed up to 64 GPa and 2000 K and a new …
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Pore scale study of crude oil distribution and interfacial processes in unconsolidated porous media: an application of synchrotron x-ray microtomography
… anionic surfactant solution in various episodes. Synchrotron X-ray microtomography (SXM) was used to obtain high-resolution 3-D images before and after each surfactant flooding event. Results show homogeneous distributions of light and heavy oil fractions, as residual saturation conditions, within …
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Development and Optimisation of an Optofluidic Evanescent Field Nano Tweezer System for Trapping Nanometre Crystals for Synchrotron X-Ray Diffraction Experiments
X-ray crystallography (the analysis of the diffraction pattern of a high-power X-ray) has become the preferred method for investigating complex molecular structures. Research has continued to improve both the hardware and software elements of this methodology; refining critical factors such as …
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Investigation of the mechanical behavior of rim/blister structure hydride phases in Zircaloy-4 by utilizing high energy synchrotron X-ray diffraction
… observed in UNF cladding material. High energy synchrotron X-ray diffraction at the APS 1-ID was utilized to study the mechanical response of hydride and matrix phase with the rim/blister distribution in a cold worked stress-relieved (CWSR) Zry-4 sheet. The only hydride phase observed in the …
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Atomic short-range order determination in gold-25 atomic percent iron and nickel-12.5 atomic percent silicon: A synchrotron x-ray diffuse scattering study
… crystal was studied using wide-angle diffuse synchrotron x-radiation scattering at room temperature. Two heat-treatments were investigated; a 400$\sp\circ$C aging treatment for two days and a second at 440$\sp\circ$C for five days, both preceded by solution treatment in the single-phase field …
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Synchrotron X-Ray Diffraction and Piezospectroscopy used for the Investigation of Individual Mechanical Effects from Environmental Contaminants and Oxide Layer Undulations in Thermal Barrier Coatings
… and Thermally Grown Oxide (TGO) strain in sprayed Thermal Barrier Coating (TBC) samples of varying porosity with and without CMAS ingression. In-Situ Synchrotron X-ray Diffraction measurements were taken on the sample under thermal loading conditions from which the YSZ and TGO peaks were …
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Effects of Laser Shock Peening on Residual Stress, Texture and Deformation Microstructure of Ti-6Al-4V Alloy
… Scanning Probe Microscopy, Conventional X-ray Diffraction, Synchrotron X-ray Diffraction, Electron BackScattered Diffraction, microhardness and nanoindentation have been used to characterize the laser shock peened Ti-6Al-4V alloy samples.The microstructure and surface modification of laser …
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Nondestructive Analysis of Advanced Aerospace Materials via Spectroscopy and Synchrotron Radiation
… environments. Characterization methods utilizing synchrotron X-Ray diffraction and spectroscopy can decrease the time required to determine an emerging material's readiness for application through intrinsic information on the material response and failure mechanisms. In this study, thermal barrier …
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