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高飽和磁化強度鐵基非晶納米晶軟磁合金發展概況

Development of Fe-based amorphous and nanocrystalline alloys with high saturation flux density

  • 摘要: 概括了鐵基非晶軟磁合金和納米晶合金的發展歷史和現狀,分別詳述了高飽和磁化強度(Bs)鐵基塊體和薄帶非晶以及納米晶合金近年來的研究成果.主要內容包括:高飽和磁化強度塊體鐵基非晶軟磁合金成分和性能,高飽和磁化強度鐵基非晶薄帶軟磁合金的成分和性能,高飽和磁化強度鐵基納米晶合金的組織、結構和性能,各類元素對合金磁性能的影響.為進一步研究高飽和磁化強度的鐵基軟磁材料提供了有價值的參考.

     

    Abstract: 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.

     

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