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晶化温度和激活能是标志非晶态合金热稳定性的两个重要参量。它们不仅与合金的成分有关,而且对同一成分的合金,也因形成热历史、微观结构等的不同而变化。在非晶合金的形成过程中,尽管冷却速度很大,但也难以避免形成一些微小的有序原子团(Cluster)。其中的一部分可能作为晶核在晶化过程中直接长大,这种晶核称为预存晶核(Pre-existing nuclei)。预存晶核的存在对晶化动力学影响很大,因此研究预存晶核对晶化温度和激活能的影响对深入理解晶化过程很有意义。
Crystallization temperature and activation energy are two important parameters of the thermal stability of amorphous alloys. They not only with the composition of the alloy, but also for the same composition of the alloy, but also due to the formation of thermal history, microstructure and other changes. In the formation of amorphous alloy, although the cooling rate is very large, but also difficult to avoid the formation of some small orderly clusters of atoms (Cluster). Some of them may grow directly as nuclei in the crystallization process. Such nuclei are called pre-existing nuclei. The existence of pre-existing nuclei has a great influence on the crystallization kinetics, so studying the effect of pre-existing nucleation on the crystallization temperature and activation energy is of great significance for the further understanding of the crystallization process.