晶体相场模型研究微结构转变

Study on Microstructure Evolution Using the Phase Field Crystal Model

晶体相场模型作为一种新的模拟技术,较之传统的模拟方法如分子动力学和标准相场模型具有无法比拟的优势,能够在原子长度尺度和扩散时间尺度上模拟材料的微观结构转变。详述了晶体相场模型原理,并从弹塑性变形、晶体形核与长大以及液相外延生长等方面论述了晶体相场模型的研究状况,指明了模型的进一步研究方向及应用前景。

Compared with traditional simulation methods such as molecular dynamics and standard phase field model, phase field crystal model, a new modeling technique, has distinct advantages over traditional, which is that this formulation allows a description of material microstructure evolution on diffusive time scales and interatomic length scales. The principle of phase field crystal model is introduced in detail. And research status of the model is re viewed from the perspectives of elasticoplastic deformation, nucleation and growth of the crystal, and liquid-phase epitaxial growth. The further research directions and promising applications of the model are pointed out as well.