On the determination of nucleation and growth kinetics by calorimetry

被引：49

作者：

Michaelsen, C ^{[1
]}

Dahms, M ^{[1
]}

机构：

[1] FLENSBURG POLYTECH INST,D-24943 FLENSBURG,GERMANY

来源：

THERMOCHIMICA ACTA | 1996年 / 288卷 / 1-2期

关键词：

nucleation and growth kinetics; calorimetry; solid-state reactions; Ti-Al; multilayer thin films;

D O I：

10.1016/S0040-6031(96)03039-0

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The Johnson-Mehl-Avrami (JMA) theory for nucleation and growth transformations is applied to isothermal and non-isothermal conditions as frequently used in differential scanning calorimetry (DSC) experiments. A model is derived with three kinetic parameters: activation energy, transformation order, and frequency factor. Analytical expressions are developed for the DSC heat-flow evolution as a function of time or temperature for both isothermal as well as constant heating rate conditions. They provide a variety of methods for the determination of the three kinetic parameters by fits to experimental DSC curves. The potential of the proposed model is demonstrated using the example of solid-state reactions in a Ti-Al multilayer thin film.

引用

页码：9 / 27

页数：19

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