Crystallization of the metallic glass Fe78B13Si9
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The microstructures and kinetics with heating for an amorphous Fe78B13Si9 alloy were studied by X-ray diffraction, transmission electron microscopy, differential thermal analysis and differential scanning calorimetry. The first crystallization takes place by the simultaneous formation of α-(Fe,Si) and Fe3B having the shapes of dendrite and spherulite, respectively. Metastable Fe3B then transformed into a stable phase of Fe2B at a higher temperature. The activation energy for crystallization and the Avrami exponent were determined. It was found that crystallization behaviour in Fe78B13Si9 is controlled by nucleation rather than growth.
KeywordsPolymer Microstructure Crystallization Transmission Electron Microscopy Activation Energy
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