Journal ArticleDOI
Magnetic properties evaluation of spray formed and rolled Fe–6.5 wt.% Si–1.0 wt.% Al alloy
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In this article, the magnetic properties of spray-formed Fe 6.5 ¼ W.% Al alloy were determined in the as-sprayed condition and after hot/cold rolling.Abstract:
The Fe–6.5 wt.% Si alloy is an excellent soft magnetic material. However, it is too brittle to be hot/cold-rolled since its ordered structure induces the formation of dissociated superlattice dislocations and correlated high stress concentrations leading to premature fracture. The addition of aluminum to high silicon electrical steels, combined with high solidification rates of the spray forming process, can alter the kinetics of these ordering transformations offering the possibility to obtain thin sheets through the hot/cold rolling process. The aim of this work was to determine the magnetic properties of spray-formed Fe–6.5 wt.% Si–1.0 wt.% Al alloy in the “as-sprayed” condition and after hot/cold rolling. After annealing at 973 K for 1 h, the best magnetic properties were observed in the rolled samples. This result is due to the elimination of microstructural defects and porosity and the formation of DO 3 ordered structure.read more
Citations
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Review of Fe-6.5 wt%Si high silicon steel—A promising soft magnetic material for sub-kHz application
TL;DR: In this article, the state-of-the-art of the Fe-Si-based soft magnetic materials including their history, structure, properties, processing, and applications are reviewed.
Journal ArticleDOI
Correlating the microstructure, growth mechanism and magnetic properties of FeSiAl soft magnetic composites fabricated via HNO3 oxidation
TL;DR: In this paper, the growth mechanism of the coatings obtained with varied HNO3 concentration has been systematically studied based on careful analysis of the coating thickness, microstructure and composition.
Journal ArticleDOI
Enhanced microwave absorption properties of the milled flake-shaped FeSiAl/graphite composites
TL;DR: In this article, an irregular shape mixed with graphite was ball-milled for 24h to achieve flake-shaped FeSiAl/graphite composites, which can be used as potential microwave absorbers in the higher GHz range.
Journal ArticleDOI
Effect of annealing temperature on magnetic properties of cold rolled high silicon steel thin sheet
TL;DR: In this article, the authors reported that 6.5%Si-Fe alloy can be cold-rolled to 0.03-0.05mm in thickness after specific thermomechanical processes including forging, hot rolling, warm rolling and heat treatments.
Journal ArticleDOI
Structure and electromagnetic characteristics of flaky FeSiAl powders made by melt-quenching
TL;DR: In this paper, it was shown that the D0 3 superlattice ordered structure increases with increasing annealing temperature in the ribbons, and the change of the pair number of bond covalent electrons in (1 − 1 − 1) plane results in the change in the magnetization of as-milled powders.
References
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Journal ArticleDOI
Commercial scale production of Fe-6.5 wt. % Si sheet and its magnetic properties
TL;DR: In this article, a commercial scale production of a Fe•6.5 wt.% Si sheet has been successfully developed, whose core losses are less than half the conventional, and even less than that of the grain-oriented silicon steel sheet at frequencies over 400 Hz.
Journal ArticleDOI
Recent developments of new soft magnetic materials
Ken Ichi Arai,Kazushi Ishiyama +1 more
TL;DR: In this article, the authors report three large topics for soft magnetic materials: ultrathin grain-oriented silicon steels, nanocrystalline magnetic materials and 6.5 wt% Si-Fe alloy sheets.
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Effect of ordering on magnetic properties of 6.5-percent silicon-iron alloy
Kenji Narita,Masato Enokizono +1 more
TL;DR: In this article, the effect of ordering on the magnetic properties such as magnetostriction, magnetic anisotropy, permeability, and coercive force of 6.5 percent silicon-iron alloy has been studied.
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The relationship of microstructure and magnetic properties in cold-rolled 6.5% Si-Fe alloy
TL;DR: In this article, the effect of microstructures on the magnetic properties in the 6.5% Si-Fe alloy was studied by means of TEM, and the microstructure was characterized by the extremely fine domains of DO/sub 3/ order phase existing in B2 order phase.
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Effects of manganese and sulfur contents and slab reheating temperatures on the magnetic properties of non-oriented semi-processed electrical steel sheet
TL;DR: In this paper, the effects of manganese and sulfur contents and slab reheating temperatures (SRTs) on the magnetic properties of non-oriented semi-processed electrical steel sheets were investigated.