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Iron-based amorphous alloys exhibit many desirable features, such as low coercivity, high permeability, high electrical resistivity, low loss, and good frequency characteristics, which make them a kind of viable energy-saving and environmentally-friendly materials. Their attractive features are due to their isotropic property, small structural correlation dimension, and magnetic anisotropic constant. The interactive coupling between the α-iron (Fe) nanocrystalline phase and amorphous soft magnetic phase further reduces the magnetic anisotropy and magnetostrictive effect of the Fe-based amorphous and nanocrystalline composites. Therefore, Fe-based amorphous and nanocrystalline alloys have a high saturation flux density and high magnetic permeability, and have been widely applied for electric power, electronics, and information transmission and conversion industries. Now, Fe-based amorphous and nanocrystalline alloys have been produced and applied to various areas on a large scale. In this paper, the development histories, situation, and tendency of Fe-based amorphous and nanocrystalline alloyswere briefly summarized. The research results of Fe-based bulk and ribbon amorphous alloys, along with nanocrystalline alloys with high saturation flux density (Bs), were reviewed in detail. The main contents of this paper include the compositions and properties of high-Bs Fe-based bulk and ribbon amorphous alloys; the compositions, structure and properties of high-Bs Fe-based nanocrystalline alloys; and the effects of alloying elements on the magnetic properties. These results will provide valuable insights that can be used for the development of Fe-based soft magnetic materials with a high saturation flux density. |
