【作者】 张鉴；

【Author】 Zhang Jian(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

【机构】 北京科技大学冶金与生态工程学院；

【摘要】 以金属熔体共存理论为基础,通过舍弃缔合溶液模型中某些经验参数系统地制定了金属熔体混合热力学参数计算公式。计算结果与实测值极为符合,证明这些公式可以确切地反映本熔体的混合热力学特性。与此同时,以含共晶体金属熔体热力学模型为基础,参考均相溶液的混合热力学参数公式制定了两相金属熔体的混合热力学参数计算公式。计算结果也与实测值极为符合,证明这些公式可以确切地反映两相金属熔体的混合热力学特性。混合热力学参数计算公式的制定就使金属熔体的热力学模型获得了两个实践检验标准(活度和混合热力学参数)及一个理论检验标准(质量作用定律),从而可严防模型制定中发生偶然错误。更多还原

【Abstract】 Based on the coexistence theory of metallic melts involving compound formation, the computational equations of mixing thermodynamic parameters were established by giving up some empirical parameters in the associated solution model. The calculated results agree excellently with practice, testifying that these equations can exactly embody the mixing thermodynamic characteristics of corresponding melts. At the same time, on the basis of the calculating model of mass action concentrations of binary metallic melts involving eutectic and referring to those equations of homogeneous solution, the calculating equations of mixing thermodynamic parameters for two phase metallic melts have also been formulated. The evaluated results agree also quite well with measured values. This in turn confirms that these equations can authentically reflect the mixing thermodynamic characteristics of two-phase metallic melts. Formulation of calculating equations of mixing thermodynamic parameters for metallic melts offer two practical criteria (activity and mixing thermodynamic parameters) and one theoretical criterion (the mass action law), so as to strictly prevent thermodynamic model from erroneous formulation for any eventuality.更多还原