首先制备了Fe73.4Cu1Nb3Si13.5B9Al0.1非晶合金带材并研究了微量Al在Fe73.4Cu1Nb3Si13.5B9Al0.1纳米晶合金中的影响情况.研究表明,微量的Al降低了Fe73.4Cu1Nb3Si13.5B9Al0.1母合金的流动性;微量的Al促使Fe73.4Cu1Nb3Si13.5B9Al0.1非晶合金在晶化热处理时的晶粒显著长大,降低了非晶合金中的内应力各向异性,由此提高了其晶化后的纳米晶合金100 kHz以上频率的μe值,同时也显著降低其获得最佳软磁性能的晶化处理温度;晶化处理后,Al原子在Fe73.4Cu1Nb3Si13.5B9Al0.1纳米晶合金中富集于α-Fe晶粒和富铜团簇内并且有可能形成了Fe3Al;Fe73.4Cu1Nb3Si13.5B9Al0.1磁芯的最佳晶化处理工艺是545℃×1h,其磁芯在1,10,100和200 kHz时的μe值分别为33 785,21 551,9 884和5 444.
参考文献
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