Variable Temperature 57Fe-Mössbauer Spectroscopy Study of Nanoparticle Iron Carbides
| Autor: | Alex Scrimshire, Alex L. Lobera, Roman Kultyshev, Peter Ellis, Susan D. Forder, Paul A. Bingham |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Croatica Chemica Acta, Vol 88, Iss 4, Pp 531-537 (2015) |
| Druh dokumentu: | article |
| ISSN: | 0011-1643 1334-417X |
| DOI: | 10.5562/cca2782 |
| Popis: | Near-phase-pure nanoparticle iron carbides (Fe3C and Fe5C2) were synthesised. Debye model calculations were used with hyperfine parameters gathered by 57Fe Mössbauer spectroscopy within a temperature range of 10 K to 293 K, with analysis providing Debye temperatures of 422 K and 364 K for two Fe sites in Fe5C2 and 355 K for ferromagnetic Fe3C. The intrinsic isomer shifts were calculated as 0.45 mm s−1 and 0.43 mm s−1 for iron sites 1 and 2 respectively in Fe5C2 and 0.42 mm s−1 for Fe3C. Recoil-free fractions for the two iron sites were also calculated at f300 0.785 and 0.726 for site 1 and 2 respectively. |
| Databáze: | Directory of Open Access Journals |
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