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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Blazquez, J. S.
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Topics
Publications (5/5 displayed)
- 2020Effect of pressure on the phase stability and magnetostructural transitions in nickel-rich NiFeGa ribbonscitations
- 2009Supersaturated solid solution obtained by mechanical alloying of 75% Fe, 20% Ge and 5% Nb mixture at different milling intensitiescitations
- 2009Correlation between microstructure and temperature dependence of magnetic properties in Fe60 Co18 (Nb,Zr) 6 B15 Cu1 alloy seriescitations
- 2008An equivalent time approach for scaling the mechanical alloying processescitations
- 2005Crystallization kinetics of Al-Mm-Ni-(Co,Fe) alloyscitations
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article
Crystallization kinetics of Al-Mm-Ni-(Co,Fe) alloys
Abstract
<p>Crystallization process has been studied for Al-Mm-Ni-(Co,Fe), where Mm indicates mischmetal. amorphous alloy series. Differential scanning calorimetry (DSC) was used to characterize the different transformation stages of the devitrification process. X-ray diffraction was applied to characterize the microstructure after each transformation stage. Nanocrystallization kinetics was studied in terms of activation energy and Avrami exponent. Nanocrystalline microstructure appears during the first transformation stage detected by DSC, with D = 15-20 nm and V<sub>cr</sub> = 0.5-0.8. After full crystallization the final phases detected are: α-Al, orthorhombic Al<sub>11</sub>Mm <sub>3</sub> and orthorhombic Al<sub>3</sub>Ni. Activation energy of nanocrystallization ranges from 1.5 to 2.7 eV. The values of n at the early (Gao-Wang) and final (constant value in Ozawa) stages of nanocrystallization are obtained: n decreases from 1-1.5 to 0.5.</p>