Crystallization of Fe73.5Cu1RE3Si13.5B9ribbons with RE = Pr, Nd, Gd
| Autor: | A. Zorkovská, M. Kašiarová, J-M Le Breton |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Journal of Physics: Condensed Matter. 16:5555-5568 |
| ISSN: | 1361-648X 0953-8984 |
| Popis: | The crystallization process in Fe 73,5 Cu 1 RE 3 Si 13.5 B 9 ribbons with RE = Pr, Nd, Gd is investigated using differential scanning calorimetry, x-ray diffraction and Mossbauer spectrometry. The crystallization steps are characterized after both short time ( 1h) isothermal annealing in the 350-650 °C range of temperature and long time (24 h) isothermal annealing at 650 and 700 °C. It is found that the crystallization process is the same for the Pr- and Nd-containing ribbons and the crystallization products are α-Fe(Si), Fe 2 B and (Fe, Si) 23 B 6 . For the Gd-containing sample, the crystallization occurs at a higher temperature, the same crystallization products are formed and Gd-containing phases are detected after 24 h, 700 °C annealing. The nature of the rare earth influences the crystallization kinetics, as the crystallization process for both Pr and Nd ribbons starts at a lower temperature and has a lower activation energy than that of the Gd ribbon, which is comparable to that of the Finemet alloy. |
| Databáze: | OpenAIRE |
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