Magnetic properties at elevated temperatures of Co substituted Finemet alloys
Communication Oxford 2002, RQ11.
Materials Science & Engineering A375-377 (2004) 1110-15
(Fe1-xCox)73.5 Si13.5 B9 Nb3 Cu1 nanocrystalline alloys where prepared by annealing melt-spun amorphous recursor. According to XRD and TEM studies,
the nanocrystalline phase consist of FeCoSi bcc nanocrystals about 10-15 nm.
The room temperature properties have been studied in the whole compositional
range. The coercive field remains low (<10 A/m) up to x = 0.2 and jumps to
values higher than 40 A/m for higher Co content. However, the annealed
Co-rich alloys exhibit a better high temperature behavior: the induction and
coercivity were found to vary little with up to 300°C at least. This result
confirms that these alloys are good candidates for high temperature
applications provided the composition and treatment are optimized for this
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