( 1. 鄭州大學(xué) 材料工程學(xué)院， 鄭州 450002;
2. 河南大學(xué) 特種功能材料重點實驗室， 開封 475001)
摘 要: 根據(jù)經(jīng)典的形核理論， 對準(zhǔn)晶/I/相及其晶體近似相R相， 采用所提出的自由能計算模型， 計算并比較了非均質(zhì)形核方式下的準(zhǔn)晶I相及其晶體近似相R相的形核功及形核率。 分析表明，從小的過冷直到準(zhǔn)晶I相平衡液相面溫度（TL=1130K）下150K的過冷范圍，準(zhǔn)晶I相都會首先形核， 而其晶體近似相/R/相不具備從液相中初生形核的動力學(xué)條件。
關(guān)鍵字: 準(zhǔn)晶I相； 動力學(xué)； 非均質(zhì)形核；形核率
primary Al-Cu-Fe icosahedral quasicrystal phase
GUO Jian1, REN Chen-xing1
（ 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
