Fabrication of Fe-based ribbon with controlled permeability by Joule heating under tensile stress

[摘要] We prepared an Fe-based ribbon with controlled permeability and low magnetic loss by continuous stress-annealing by joule heating (CSA-JH) method. The shortest annealing time necessary for the obtaining of the ribbons with completely developed anisotropy was 1 s, but in order to obtain the sufficiently crystallized ribbons with small saturation magnetostriction it is required to perform annealing longer than 2 s. A toroidal core was prepared from a long ribbon with controlled permeability and small saturation magnetostriction, and the magnetic loss and relative permeability of the core were evaluated in the frequency range of 0.1-3 MHz. The permeability was kept constant up to 2 MHz, and the magnetic loss is lower than that for other types of core with a similar permeability value. These results suggest that the CSA-JH method is a promising method for realizing an Fe-based core with excellent magnetic properties. (C) 2008 Published by Elsevier B.V.

[发布日期] 2008-10-01

[效力级别]  Proceedings Paper

[关键词] continuous stress-annealing;stress-induced anisotropy;Joule heating;controlled permeability;nanostructure material