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近年来,铁基微晶合金FeCuMSiB(M=Nb,Cr,V,W,Ta)具有优异的软磁特性引起人们的重视,其最好的软磁性能可以通过最佳的热处理条件得到,此时在非晶中,会均匀地长出直径约为10nm左右的FeSi相晶粒,与剩余的非晶相形成纳米微晶的晶粒与晶界.Herzer等人曾利用无规各向异性模型来解释该材料具有优异磁性能的原因,认为晶粒尺寸D足够小会使有效磁各向异性常数减小,其值与D~6成正比.然而,一些实验已经证实提高退火温度(例如T_a>600℃),其磁性能会急剧变坏,但此时的晶粒尺寸并未明显地变化,因此有关磁性能与材料微结构之间的关系还有待进一步的研究.
In recent years, FeCuMSiB (M = Nb, Cr, V, W, Ta) has attracted people’s attention because of its excellent soft magnetic properties. Its best soft magnetic properties can be obtained by the best heat treatment conditions, In the amorphous state, FeSi phase grains having a diameter of about 10 nm are uniformly grown to form crystal grains and grain boundaries of the nanocrystallites with the remaining amorphous phases. Herzer et al. Utilized a random anisotropic model To explain why this material has excellent magnetic properties, it is believed that a sufficiently small grain size D will reduce the effective magnetic anisotropy constant, which value is proportional to D ~ 6. However, some experiments have shown that increasing the annealing temperature (For example, T_a> 600 ° C), its magnetic properties will deteriorate sharply, but the grain size does not change obviously at this time. Therefore, the relationship between the magnetic properties and the microstructure of the material remains to be further studied.