Abstract

A thermodynamic approach to the description of single- and multistage crystallization of iron- and aluminum-based amorphous alloys is suggested in this work. The adequacy of theoretical calculation of the volume fraction of the crystalline phase to experimental data is demonstrated for the case of precipitation of one or several phases in disordered systems. The parameters of the model depend on the rate of heating of amorphous alloy. In the case of multistage crystallization, the theoretical calculations indicate the occurrence of thermal processes in the system, which affect the crystallite growth. These processes are the decelerated growth of crystallites of the same phase; enrichment of the amorphous matrix in alloy components, which do not crystallize, as a result of thermal diffusion; overlapping thermal effects of different processes; etc.

中文翻译：

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非晶态合金的单阶段和多阶段结晶

摘要

在这项工作中，提出了一种热力学方法来描述铁基和铝基非晶合金的单阶段和多阶段结晶。对于在无序系统中析出一相或数相的情况，证明了晶相体积分数的理论计算与实验数据的充分性。模型的参数取决于非晶态合金的加热速率。在多阶段结晶的情况下，理论计算表明系统中发生了热过程，这会影响微晶的生长。这些过程是同相微晶生长的减慢。由于热扩散而使未结晶的合金成分富集无定形基体；不同过程的重叠热效应；等等