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自20世纪90年代初相场法被引入金属枝晶生长以来,一直是人们研究的热点.在分子化合和晶体生长过程中,每一个分子、原子团,以及晶粒都包含着内势能.内势能又可以分为内压强-势能与体积-势能两种.内压强-势能向体积-势能的转换和恢复影响着矿物质的结晶和金属材料的枝晶生长,这是一个一直被人们忽略了的问题.本文论述了内势能及内势能熵在相变过程中的转换和计算方法及内势能熵方程的特性,并讨论了内势能熵在相场方程中的地位和作用.
Since the early 1990s, phase-field method has been the hotspot of metal dendrite growth.In the process of molecular synthesis and crystal growth, each molecule, atomic group, and grain contain internal potential energy. But also can be divided into the internal pressure - potential energy and volume - Potential 2. Internal pressure - potential energy to the volume - potential energy conversion and recovery of mineral crystallization and metal material dendritic growth, which has been neglected This paper discusses the transformation and calculation methods of internal potential and internal potential energy entropies and the properties of internal potential energy entropy equations, and discusses the position and function of internal potential energy entropy in the phase field equation.