Some of the cross sections are used to stand for a certain component, and semiternary phase diagrams are ploted, then a quaternary phase diagram shown in a tetrahedron is obtained.
提出了利用正四面体的某些截面表示一定组成，得出相分离曲线和相分离曲面，并能较好地描述四元体系。
The principle of the boundary theory of phase diagrams is introduced and an experimental method of determining the isopleth section of phase diagrams of quaternary alloy system is described.
简单介绍了相图边界理论的原理，根据该理论设计了一种测定四元合金体系的截面相图的实验方法。
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