摘要
以复杂的Warren二元及赝二元常规系统下的液-固界面自由能理论为基础,借助Pb-Al二元体系为例对其进行简化,获得了二元非混溶体系液-固界面自由能物理模型,然后对其热力学公式进行推导,得出只含两个参变量的理论公式,并对几种温度下液-固界面自由能(γSL)计算值及用多相平衡(MPE)法得到的实验值作了对比.结果表明,改进的物理模型及理论公式易于理解、计算简便,γSL的计算值取决于温度及Al原子分数的两个参变量,与实验值较好地吻合,证明了该模型具有结构简单、精度较高的优点,并可作为其它非混溶体系γSL的计算模型,为其推广应用奠定基础.
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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2009年第11期2177-2180,共4页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(50664005)
国家高技术研究发展计划(863)(2009AA03Z512)资助项目~~
关键词
非混溶
Pb-Al二元体系
Warren理论
多项平衡法
液-固界面自由能
Immiscible
Pb-Al binary system
Warren s interface theory
Multiphase equilibrium method
Liquid-solid interfacial free energy
