用快冷法制备了Fe91-xZr5BxNb4(FZBN)合金,当x=5-30时,样品为非晶态.研究了B含量对非晶合金的晶化、玻璃形成能力(GFA)和磁性能的影响.FZBN的GFA在其共晶成分x=27.5附近达到极大值.当x≤20时,FZBN非晶合金以一次晶化的模式晶化;当20＜x＜30时,以共晶模式晶化;当x=30时,以多晶模式晶化,其晶化产物为具有立方结构的Fe-Zr-B-Nb合金相,该相的室温饱和磁化强度和矫顽力分别为137 A·m2/kg和580.9 A/m.随着x的增加,FZBN非晶合金的玻璃转化温度(Tg)、晶化温度(Tx)、Curie温度(TC)和饱和磁化强度(Ms)增加,但矫顽力(Hc)下降.当x＞20时,由于晶化模式的改变,不仅Tg,Tx和GFA突然迅速增加,而且TC,Ms和Hc及其随x变化的规律也发生变化.FZBN非晶合金在高B含量区(25≤x≤30)具有很好的GFA、热稳定性和软磁性能.
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