二元合金自由能的统计理论

Statistical theory on free energy for binary alloys

为了处理二元合金中多种相的相平衡和相变问题 ,根据准化学近似法和熵的统计理论 ,提出了二元合金自由能统计理论的一般处理模式 ,推导了自由能与成分和有序度参数关系的表达式 .由此对Fe -Co、Pt-Co和R -Co合金的相平衡和相变问题进行了处理 ,获得了理想的结果 .

In order to achieve phase equilibrium and phase transformation of various phases, a general model is proposed on the basis of the quasichemical approximation and the statistical theory of entropy for establishing the statistical theory on free energy of binary alloys and an expression is derived for the relationship between free energy and alloy composition and long range order parameters. The equilibrium and transformation of phases for Fe-Co, Pt-Co, and R-Co alloys are discussed and expected results are obtained.