( 1. 郑州大学 材料工程学院， 郑州 450002;
2. 河南大学 特种功能材料重点实验室， 开封 475001)
摘 要: 根据经典的形核理论， 对准晶/I/相及其晶体近似相R相， 采用所提出的自由能计算模型， 计算并比较了非均质形核方式下的准晶I相及其晶体近似相R相的形核功及形核率。 分析表明，从小的过冷直到准晶I相平衡液相面温度（TL=1130K）下150K的过冷范围，准晶I相都会首先形核， 而其晶体近似相/R/相不具备从液相中初生形核的动力学条件。
关键字: 准晶I相； 动力学； 非均质形核；形核率
primary Al-Cu-Fe icosahedral quasicrystal phase
（ 1. College of Materials Engineering, Zhengzhou University, Zhengzhou 450002, China;
2. Lab of Special Functional Materials, Henan University, Kaifeng 475001, China）
Abstract: By using a proposed thermodynamic model for the calculation of the changes of Gibbs free energy during the primary solidification of the icosahedral quasicrystal phase and its approximant crystal phase, the nucleation energies and nucleation rates for the icosahedral quasicrystal phase and its approximant crystal phase are calculated according to the classic theory. The calculation results reveal that the IQC will nucleate primarily when the temperature of the undercooled liquid alloy is in the range of 1130K to 980K.
Key words: icosahedral quasicrystal phase; kinetics; heterogeneous nucleation; nucleation rate
