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在评估现有文献实验相图数据的基础上,采用Calphad技术优化和计算了Be--Cr二元合金体系平衡相图.液相和端际固溶体相采用替换式溶体溶液模型,化学计量比中间化合物CrBe2和CrBe12采用Neumann--Kopp规则描述它们的热力学函数.利用优化所得的热力学参数计算相图,结果能很好地解释大部分实验数据.本工作还采用Miedema模型估算了中间化合物CrBe2和CrBe12的摩尔生成焓,并与热力学计算值比较,所得结果符合良好.
Based on the evaluation of the experimental phase diagram of the existing literatures, the equilibrium phase diagram of Be - Cr binary alloy system was optimized and calculated by Calphad technique. The liquid phase and the end solid solution phase were characterized by using the alternative solution model and the stoichiometric ratio The compounds NeuBeau - Kopp and CrBe12 are used to describe the thermodynamic functions of CrBe2 and CrBe12, respectively. Most of the experimental data are calculated by using the thermodynamic parameters obtained from the optimization. Most of the experimental data are also well explained in this work. The molar enthalpy of formation was compared with the calculated thermodynamic data and the results were in good agreement.