Melt-spun Fe 85Si 1-2B 8-11P 1-4Cu 1 alloys have unusual hetro-amorphous structures which can transfoto nanocrystalline structures composed of α-Fe grains with less than about 25 nm in size with crystallization. Especially, Fe 85Si 1-2B 8-11P 1-4Cu 1 nanocrystalline soft magnetic alloys prepared by crystallizing an as-quenched nanohetero-amorphous phase including a large amount of extremely small α-Fe grains (less than 2-3 nm in size) exhibit high B 800 of 1.8-1.9 T (at 800 A/m) almost comparable to those of commercial oriented silicon steels and significantly higher than those of non-oriented silicon steels, along with extremely low core loss (W) which is 1/2-1/3 smaller than that of the highest-grade oriented silicon steel and about one-order smaller than those of non-oriented silicon steels at maximum flux density of 1.7 T. The nanocrystalline alloys with lower materials cost due to absence of rare-metals are expected to not only contribute to significant energy-saving and reduction of CO 2 emission through reduction in W but also be useful to conserve the earth's resources and environment.
- Excellent magnetic softness
- Fe-Si-B-P-Cu nanocrystalline alloy
- hetero-amorphous structure
- high magnetic flux density
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering