通过高分辨透射电子显微镜(HRTEM)和差示扫描量热法(DSC)研究了Fe83Zr7B9Mn1非晶合金中α-Fe纳米晶的结晶过程和非等温结晶动力学.通过HRTEM观察和X射线衍射分析,确定结晶析出相是α-Fe,在经过903K热处理之后,合金内部晶粒尺寸长大至20nm以上.对重叠放热峰进行了分峰拟合.利用Flynn-Wall-Ozawa方法确定了结晶过程的表观激活能Ea=260.3kJ/mol.进一步研究发现Fe83Zr7B9Mn1非晶合金中α-Fe纳米晶非等温结晶过程不适合用Johnson-Mehl-Avrami (JMA)模型描述,而可以利用Sesták-Berggren自催化模型进行描述.通过计算,α-Fe纳米晶结晶过程的指前因子以及转化函数分别为:lnA =30.6以及f(α)=α 0.37(1-α)1.08.
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