用微计算机绘制合金相图

原理、解非线性热力学方程组的数值计算方法以及相图绘制的具体步骤和计算机程序。利用 ＩＢＭ－ＰＣ微计算机绘制了 Ｍｏ－Ｒｕ、 Ｐｔ－Ｒｅ、 Ｎｂ－Ｏｓ、 Ｗ－Ｐｄ、 Ｍｏ－Ｉｒ等二元系统的共晶、包晶相图，以及 Ｍｏ－Ｗ－Ｏｓ、 Ｒｅ－Ｈｆ－Ｍｏ等三元系统的等温截面相图，并和实验相图进行了比较。

Drawing Alloy Phase Diagram with Microcomputer

Based on the ideal solution and the regular solution model and by means of the analysis of the Gibbs, free energy of alloy systems, the thermodynamic principle for constructing phase diagrams is described, the numerical method for solving nonlinear equations is discussed, and the methods and stages for constructing phase diagrams are given. By using IBM-PC microcomputer, some binary phase diagrams such as Mo-Ru, Pt-Re, Nb-Os, W-Pd and Mo-Ir systems and some equitemperature sections of ternary phase diagrams such as Mo- WOs, Re-Hf-Mo systems have been drawn. The comparison of the calculated phase diagrams with experimental ones has shown that the type, the form and the precision of the phase diagrams constructed depend on the free energy model, the expression as well as the relative thermodynamic parameters of the alloy systems.