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 5 of 5 for “"in-situ synchrotron XRD"”.
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Microstructural study of intergranular M23C6 precipitates in Alloy 709
The microstructural properties of M23C6 (M: mainly Cr), the predominant precipitate phase of Alloy 709, were studied with respect to the correlation with the austenite matrix, γ-Fe. Alloy 709 specimens, aged at 550, 650, and 750℃ for 1 - 3000 hours, were investigated using electron microscopy and …
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Understanding two-phase reaction processes in electrodes for Li-ion batteries
The occurrence of a phase separation, which induces substantial structural rearrangements and large volume changes, is generally considered to limit the high rate application of any battery electrode material. Contrary to this perception, nanoparticulate LiFePO$_{4}$ exhibits exceptionally high …
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Environmental mineralogy of gold recovery from refractory gold-arsenic-bearing Bakyrchik concentrates
Arsenic contamination of groundwater associated with mining operations is a widespread problem across the globe. The release of arsenic (As) into the environment occurs naturally by oxidation of exposed sulfide minerals. In the case of gold ores, the mining and beneficiation may also produce …
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Investigation of the properties of iron-bearing alloys and silicates and their implications for the Earth’s lower mantle and core
… 80% of the Earth’s lower mantle by volume, leaving ~ 15% to (Mg,Fe)O ferropericlase and ~ 5% to CaSiO3 perovskite. Therefore characteristics of the lower mantle would be determined mostly by the properties of the silicate perovskite and ferropericlase. While high-spin – low-spin crossover in …
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In-Situ Investigations of Calcium-Magnesium-Aluminosilicates (CMAS) Infiltration Effects on Thermal Barrier Coatings Under Extreme Environments Replicating Jet Engines
<p>Calcium-magnesium-aluminosilicate (CMAS) particulates, such as sand or volcanic ash, are ingested by gas turbine jet engines during operation. When operating within high abundance regions, these particulates negatively interact and degrade the high temperature thermal barrier coatings (TBC) …