研究了不同退火温度对(Fe0.5Co0.5)78.4Si9B9Nb2.6Cu1纳米晶软磁合金结构和高频磁性的影响.结果表明,在初始晶化温度455℃以上退火,在菲晶基体中析出α—FeCo相.随着退火温度的升高,开始出现有序的(Fe,Co)3Si.当退火温度高于620℃时,出现硼化物硬磁相.490℃退火后合金的初始磁导率最高可达23000,晶粒尺度为19.4 nm.在490～610℃退火,随退火温度的提高,合金复数磁导率下降,但截止使用频率提高.实验观察到该合金的磁谱曲线为驰豫型,截止使用频率fr为3.14～5.64 MHz,明显高于Fe基纳米晶软磁合金.
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