A multi-peak transformation kinetics model and its application to the isothermal crystallization of Mg65Cu25Y10 amorphous alloy

作者：Wang Dongjiang; Liu Yongchang^*; Gao Zhiming; Zhang Yanhua

来源：Journal of Non-Crystalline Solids, 2008, 354(33): 3990-3999.

DOI：10.1016/j.jnoncrysol.2008.05.023

• alloys
• transition metals
• crystal growth
• nucleation
• X-ray diffraction
• calorimetry

Transformation kinetic analytical model plays an important role in the prediction of the microstructural evolution. In this paper, a simple formula has been developed for isothermal mixed nucleation transformation as the kinetic parameters of its JMAK-form formula vary upon time. The explored multi-peak transformation kinetics shows that each peak can be treated as a JMAK case, which is consistent with the classical JMAK model in only one peak case. Thereafter, a method has been developed to deal with the isothermal DSC data of multi-peak overlapping transformation. The isothermal crystallization process of Mg65Cu25Y10 amorphous alloy has been explored and fitted well with the multi-peak kinetics model, which indicates a continuous nucleation, three dimensional interface-controlled growth mechanism with three crystallization peaks overlapping each other.

• 出版日期2008-9-1
• 单位天津大学