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利用热重法（ＴＧ）研究了超微晶Ｆｅ＿（７３．５）Ｃｕ＿１Ｎｂ＿３Ｓｉ＿（１３．５）Ｂ＿９形成的等温晶化动力学过程，由Ｊ－Ｍ－Ａ方程求出了晶化动力学常数ｎ（ｘ）和Ｅ＿ｃ（ｘ）对ｘ的曲线。晶化形核过程中这些曲线的变化关系可以很好的由Ｃｕ的作用来说明。同时与等温ＤＳＣ的结果比较表明ＴＧ更能给出晶化初期的形核信息。
The isothermal crystallization kinetics of ultrafine Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 was investigated by thermogravimetry (TG). The crystallization kinetic constants n (X) and E_c (x) to x. The relationship between these curves in the process of nucleation is well explained by the action of Cu. At the same time, the results of isothermal DSC comparison show that TG can give more nucleation information at the initial stage of crystallization.