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Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying


Three nanocrystalline alloys, Fe75−xCox(Ni70Zr30)15B10 (x = 0, 10, and 20), were synthesized from elemental powders in a planetary high-energy ball mill. Their microstructure, magnetic properties, and thermal stability were characterized by X-ray diffraction, transmission Mössbauer spectroscopy, transmission electron microscopy, scanning electron microscopy, induction coupled plasma, vibrating sample magnetometry, and differential scanning calorimetry. After 80 h of milling, the nanocrystallites size of alloys is in the range 6–10 ± 1 nm. The lattice parameter decreases when increasing (decreasing) milling time (Fe content). Furthermore, the thermal stability of the nanocrystalline phase increases when increasing Co concentration. The activation energy of the main crystallization process, between 275 ± 8 and 311 ± 10 kJ mol−1, is associated with grain growth. Slight contamination from milling tools and milling atmosphere was detected. Minor differences were detected after Mössbauer analysis.

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Financial support from MICYT MAT2006-13925-C02-02 (FEDER) and DURSI 2005SGR-00201 projects is acknowledged.

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Correspondence to J. J. Suñol.

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González, A., Escoda, L., Suñol, J.J. et al. Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying. J Mater Sci 45, 557–561 (2010).

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  • Differential Scanning Calorimetry
  • Milling
  • Crystallite Size
  • Mechanical Alloy
  • Induce Couple Plasma