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用高密度脉冲电流处理Ｆｅ７８Ｂ１３Ｓｉ９非晶合金，随电流密度的变化在不同的温度下和相同的时间内实现了试样的纳米晶化．透射电镜观察及Ｘ射线衍射分析表明，在由电脉冲方法所制备的纳米晶Ｆｅ７８Ｂ１３Ｓｉ９合金中存在着亚晶和孪晶等亚结构．三种晶化相是α－Ｆｅ（Ｓｉ），Ｆｅ２Ｂ和少量的Ｆｅ３Ｂ．随着电流密度的增加，试样中的Ｆｅ２Ｂ相略有增加并出现了有序的Ｆｅ３Ｓｉ结构，但平均晶粒尺寸保持不变，由Ｓｈｅｒｒｅｒ方法估算为２０～３０ｎｍ．在电脉冲试样中亚结构的存在和相对不变的晶粒尺寸应归因于电脉冲处理所导致的不同的晶化机制
High density pulse current treatment of Fe78B13Si9 amorphous alloy, with the current density changes at different temperatures and the same time to achieve the nanocrystallization of the sample. Transmission electron microscopy and X-ray diffraction analysis showed that substructures such as subgrains and twins exist in the nanocrystalline Fe78B13Si9 alloy prepared by the electric pulse method. The three phases are α-Fe (Si), Fe2B and a small amount of Fe3B. With the increase of current density, the Fe2B phase in the sample slightly increases and the ordered Fe3Si structure appears. However, the average grain size remains unchanged, which is estimated to be 20-30 nm by Sherrer’s method. The presence of substructures and the relatively constant grain size in electrical pulse specimens should be attributed to the different crystallization mechanisms caused by the electrical pulse treatment