Abstract The effects of minor Nb addition on the crystallization mechanism for a FeNiPC(Nb) amorphous alloy were studied via investigating its non-isothermal crystallization kinetics. With minor Nb addition, the thermal stability of the alloy increases as evidenced by the enlargement of the supercooled liquid region. Meanwhile, the location activation energy of both Nb-added and without Nb-added alloys correlates positively with the crystallized volume fraction during the whole primary crystallization stages, as calculated by the isoconversional methods. However, the kinetics analysis using the modified Johnson-Mehl-Avrami-Kolmogorov equation indicates that the addition of Nb changes the crystallization mode of the alloys, that is, from the growth with a decrease nucleation rate to a constant nucleation rate in a diffusion-controlled manner. This can be further confirmed by the atomic force microscopy showing that Nb would restrain the atomic diffusivity and suppress the crystallization growth rate in this alloy.

中文翻译：

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FeNiPC(Nb)合金非等温结晶动力学

摘要 通过研究非等温结晶动力学，研究了少量Nb添加对FeNiPC(Nb)非晶合金结晶机理的影响。加入少量 Nb 后，合金的热稳定性增加，过冷液体区域的扩大证明了这一点。同时，添加 Nb 和不添加 Nb 合金的位置活化能与整个初晶阶段的结晶体积分数呈正相关，如通过等转化方法计算的。然而，使用修正的 Johnson-Mehl-Avrami-Kolmogorov 方程的动力学分析表明，Nb 的加入改变了合金的结晶模式，即从成核速率降低的生长到扩散过程中的恒定成核速率 -受控方式。