﻿ Pb-Al二元体系液-固界面自由能的热力学理论计算

### Pb-Al二元体系液-固界面自由能的热力学理论计算

1. 昆明理工大学材料与冶金工程学院, 昆明 650093|云南省新材料制备与加工重点实验室, 昆明 650093
• 收稿日期:2009-04-10 修回日期:2009-08-03 发布日期:2009-10-28
• 通讯作者: 周生刚, 竺培显 E-mail:zsgandyliu@126.com; zhu_pei_xian@126.com

### Thermal Theoretical Calculation of the Liquid-Solid Interfacial Free Energy in Pb-Al Binary System

ZHOU Sheng-Gang, ZHU Pei-Xian, HUANG Wen-Fang, YANG Xiu-Qin, XU Jian

1. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China|Yunnan Key Laboratory of New Materials Preparation and Processing, Kunming 650093, P. R. China
• Received:2009-04-10 Revised:2009-08-03 Published:2009-10-28
• Contact: ZHOU Sheng-Gang, ZHU Pei-Xian E-mail:zsgandyliu@126.com; zhu_pei_xian@126.com

Abstract:

Based on the Warren's interface theory of liquid-solid interfacial energy for complicated compatible binary and pseudo binary systems, a physical model for the liquid-solid free interfacial energy that has been simplified at the theoretical level was obtained by taking the Pb-Al liquid-solid binary system as an example. A theoretical formula with two variables was then obtained by deducing a thermodynamic equation, and the calculational values and the experimental values by multiphase equilibrium method (MPE) were compared. Finally, research on a Pb-Al binary liquid-solid system showed that the calculated liquid-solid interfacial free energy (γSL) values from the model provided a result similar to the experimental measurement with a low average error. The calculated values only depend on the temperature and the Al concentration. A foundation to calculate γSL for other systems has therefore been established.

MSC2000:

• O642