超细晶粒结构的铁基软磁合金( Fe-based soft magnetic alloys composed of ultrafine grain structure )

Y Yoshizawa K Yamauchi Experimental/ boron alloys coercive force copper alloys crystallisation Curie temperature ferromagnetic properties of substances grain size iron alloys magnetostriction silicon alloys/ magnetostriction coercive force Curie temperature Fe-based soft magnetic alloys ultrafine grain structure amorphous ribbons crystallization temperature BCC Fe solid solution grain growth saturation flux density Fe-Cu-Nb-Si-B Fe-Cu-Ta-Si-B Fe-Cu-Mo-Si-B Fe-Cu-W-Si-B/ A8140G Other heat and thermomechanical treatments A8140R Electrical and magnetic properties (related to treatment conditions) A7550B Ferromagnetism of Fe and its alloys A6140D Structure of glasses A7530K Magnetic phase boundaries A7560 Magnetic domain effects, magnetization curves, and hysteresis/ FeCuNbSiB/ss Cu/ss Fe/ss Nb/ss Si/ss B/ss FeCuTaSiB/ss Cu/ss Fe/ss Si/ss Ta/ss B/ss FeCuMoSiB/ss Cu/ss Fe/ss Mo/ss Si/ss B/ss FeCuWSiB/ss Cu/ss Fe/ss Si/ss B/ss W/ss

为开发新型铁基软磁合金，研究了Fe-Cu-M-Si-B（M：Nb,Mo,Ta,W等）合金的磁性能。合金首先形成非晶薄带，然后在晶化温度以上退火。退火后得到了与钴基非晶合金相当的优良软磁性能。尤其是含Cu和Nb的合金优于含其它元素的合金。这些新合金由超细晶粒组织组成。晶粒直径约10nm，主要晶相为含Si和B的BCC Fe固溶体。这可能是Cu影响BCC Fe-Si-B固溶体的形核过程，Nb抑制晶粒长大的结果。该合金具有优良的软磁性能和高的饱和磁通密度，适用于饱和电抗器、扼流圈和变压器等多种磁性元件

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