在差热扫描分析仪上以不同加热速率测试非晶Fe78Si11B9和纳米晶Fe73.5Cu1B7Si15.5Nb3合金晶化情况,采用Kissinger方程计算非晶Fe78Si11B9合金的激活能为(370±3)kJ,Fe73.5Cu1B7Si15.5Nb3纳米晶第一晶化相的激活能为(295±5)kJ；提出纳米晶Fe73.5Cu1B7Si15.5Nb3合金初晶相激活能较低与率先析出的Cu簇刺激晶化相析出有关；分析了Cu簇的析出动力学,计算出Fe73.5Cu1B7Si15.5Nb3合金在773 K保温3600 s时Cu簇的生长平均半径为3 nm,在773 K保温2.5h时,最大析出体积密度为3.7×1024/m3;计算结果与K.Hono试验观察结果一致(在673 K保温3600 s,平均半径3nm,析出Cu簇的密度数量级在1024/m3).
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