Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (11): 2177-2180.doi: 10.3866/PKU.WHXB20091114

• ARTICLE • Previous Articles     Next Articles

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.

Key words: Immiscible, Pb-Al binary system, Warren’s interface theory, Multiphase equilibriummethod, Liquid-solid interfacial free energy

MSC2000: 

  • O642