相图是描述物质体系热力学相平衡关系的一种几何表达方式.历史上大多数的相图是通过实验测定而建立的.近二十年来,材料科学与工艺这门学科的形成和进步,相图做为材料体系信息的重要来源,起了很大作用;而材料科学与工艺的深入发展,亦对相图研究提出了进一步的要求;计算机技术又 Phase diagram is a geometric representation of the thermodynamic equilibrium relationship of material systems.Most of the phase diagrams in history have been established by experiments.For the past two decades, the formation and progress of material science and technology Figure as an important source of material system information has played a significant role; and materials science and technology in-depth development, but also on the phase diagram of the study put forward further requirements; computer technology