Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying
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Document typeArticle
Defense date2010-01
Rights accessRestricted access - publisher's policy
Abstract
Three nanocrystalline alloys, Fe75-xCox(Ni70
Zr30)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 ofmilling, 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 increaseswhen increasingCo concentration. The
activation energy of themain 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.
CitationGonzalez, A. [et al.]. Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying. "Journal of materials science", Gener 2010, vol. 45, núm. 2, p. 557-561.
ISSN0022-2461
Publisher versionhttp://www.springerlink.com/content/h661n41g75538062/fulltext.pdf
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