高饱和磁感纳米晶软磁合金Fe-M-B的磁特性及应用前景

Properties and Prospective Applications of Nanocrystalline Fe-M-B Alloys

介绍了高饱和磁感铁基纳米晶软磁合金系Ｆｅ－Ｍ－Ｂ（Ｍ＝Ｚｒ，Ｎｂ，Ｈｆ）的物理和磁性能，该合金具有１．５～１．７Ｔ高饱和磁感值的同时具有高的有效磁导率μｅ值和低的高频铁损，同时还具近于零的饱和磁致伸缩系数λｓ和优良的噪声衰减特性。改进型Ｆｅ８４Ｚｒ３．５Ｎｂ３．５Ｂ８Ｃｕ１合金具有与Ｆｅ７３．５Ｎｂ３Ｃｕ１Ｓｉ１３．５Ｂ９相当的有效磁导率，而Ｂｓ值却高达１．５３Ｔ。此外Ｆｅ－Ｍ－Ｂ纳米晶合金还具有优良的温度稳定性和抗老化性能及应力不敏感特性，因此可望能在变压器、电感器、磁头及其它元件中得到广泛的应用。

Nanocrystalline Fe-M-B(M=Zr,Nb,Hf) alloy exhibits high B S above 1.5 T,low saturation magnetostriction(λ s) and high effecitve permeability(μ e). The improved Fe 84 Zr 3.5 Nb 3.5 B 8Cu 1 alloy shows high μ e of 100000 at 1kHz combined with a high B S of 1.53 T. The excellent μ e is comparable to those of nanocrystalline Fe 73.5 Nb 3 Cu 1Si 13.5 B 9 alloy. The Fe-M-B based alloys also have very low core olss,the suffcient thermal stability and low stress-sensibility. Therefore ,Fe-M-B alloys are expected to be used in transformers ,inductors, magnetic heads, and other devices and parts.