Structure of UAl4 prepared by solid state reaction
| Autor: | Michael Aizenshtein, C. Cotler, V.Y. Zenou, Giora Kimmel |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Scanning electron microscope
Chemistry Mechanical Engineering Alloy Metals and Alloys Analytical chemistry engineering.material Crystallography Mechanics of Materials Powder Diffractometer Powder metallurgy X-ray crystallography Materials Chemistry engineering Crystallite Stoichiometry Powder diffraction |
| Zdroj: | Journal of Alloys and Compounds. 329:189-194 |
| ISSN: | 0925-8388 |
| Popis: | Randomly oriented polycrystalline UAl4 was obtained by arc melting of Al–66.7wt.%U alloy followed by a short-time solid state reaction. X-ray powder diffractometer (XRPD), scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS) and density measurements were used in order to determine the exact deviation of stoichiometry in the UAl4 structure. Machine ball-milled powder samples were used in order to obtain high quality XRPD data, which could be refined by Rietveld method. It was confirmed that only ∼90% of the uranium sites are occupied. There is no evidence for ordering of vacancies in our samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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