ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The metalloid effect on magnetic properties and microstructures of iron-based alloys with ultrafine grain structures was investigated. For Fe73.5Cu1Nb3(SixB1−x)22.5 (0.5≤x≤0.8) alloys with 10–15-nm grain diameters, the permeability increased with Si content. The alloys with x=0.5 and 0.6 subjected to the optimum heat treatment had two different ferromagnetic phases which were composed of an α-Fe(Si) solid solution with high Curie temperature and an interfacial phase with low Curie temperature. However, in high Si alloys with x=0.7 and 0.8, only a phase with high Curie temperature appeared. This result suggests that in the high Si composition range, a complete transformation from the amorphous phase to the α-Fe(Si) single phase was achieved. The disappearance of the interfacial phase which would certainly disturb the exchange coupling between the α-Fe(Si) phase grains would be considered to be one of the factors for the increased permeability.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.347816
