Study of the kinetics and products of the devitrification process of mechanically amorphized Fe70Zr30 alloy
Devitrification of mechanically alloyed amorphous FeZr at. % compound consists on a two-step process: amorphous → amorphous + bcc Fe + FeZr → FeZr + FeZr. This sequence is inferred from the evolution of the Mössbauer spectra, the thermomagnetic experiments and the X-ray diffraction (XRD) patterns. H...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/216738 |
| Acceso en línea: | http://hdl.handle.net/10261/216738 |
| Access Level: | acceso abierto |
| Palabra clave: | Fe-Zr intermetallics Amorphous alloys Crystallization kinetics Anocrystalline alloys Mössbauer spectroscopy |
| Sumario: | Devitrification of mechanically alloyed amorphous FeZr at. % compound consists on a two-step process: amorphous → amorphous + bcc Fe + FeZr → FeZr + FeZr. This sequence is inferred from the evolution of the Mössbauer spectra, the thermomagnetic experiments and the X-ray diffraction (XRD) patterns. Hyperfine parameters for both intermetallics have been obtained from Mössbauer spectroscopy in correlation with the phase identification from XRD results. The broadening of the stable compositional range of FeZr intermetallic above 1000 K is responsible for a strong dependence of the phase fractions on heating and cooling rates. Despite the overlapping of the two processes involved in the devitrification, the individual Avrami exponents of each one have been estimated. |
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