Room and ‘in situ’ high-temperature Mössbauer study of ordering in Fe–Si (0–22 at%) alloys

Fe–Si alloys are known to have excellent soft magnetic properties, especially around 6.5wt% Si (12.1at%). Nevertheless, above 3.5wt% (6.7at%) the material becomes very brittle and this has prevented its mass production. It has been usually reported that the cause of this phenomenon lies on a disorde...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.E1663-E1665
Main Authors: Ruiz, D, Ros-Yañez, T, De Grave, E, Vandenberghe, R.E, Houbaert, Y
Format: Article
Language:English
Subjects:
Electrical steel
High-silicon steel
Mössbauer spectroscopy
Order–disorder
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Summary:Fe–Si alloys are known to have excellent soft magnetic properties, especially around 6.5wt% Si (12.1at%). Nevertheless, above 3.5wt% (6.7at%) the material becomes very brittle and this has prevented its mass production. It has been usually reported that the cause of this phenomenon lies on a disorder–order transition, with three ordered situations involved, namely A2, B2 and D03. Room and ‘in situ’ high-temperature Mössbauer spectroscopy up to 600°C was carried out on Fe–Si alloys with a Si content varying from 0 to 22 at% Si in order to find out information about these ordering phenomena. Results show that the increasing temperature in low-Si alloys (4at%) only slightly influences ordering, while an increase of B2 and D03 order is found for higher Si contents (10–14at%) between 450°C and 600°C.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.12.1094