基于相场法的多晶体材料内静电场的有限差分仿真  

Finite Difference Simulation of the Distribution of Electric Field in Polycrystalline Materials Based on the Phase-Field Method

作　　者：杜继实[1] 张涛[1,2] 易歆雨[1] DU Jishi;ZHANG Tao;YI Xinyu(Institute of Electronic Engineering,CAEP,Mianyang 629100,China;College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]四川大学材料科学与工程学院,成都610065

出　　处：《电瓷避雷器》2021年第6期45-49,55,共6页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:51972053);中物院超精密加工技术重点实验室基金(编号:ZT17001,ZD18001,ZM18004)。

摘　　要：建立多晶材料内微观不均匀性对电场分布影响的仿真方法具有重要意义。笔者给出了一种基于相场法的多晶体材料内静电场的有限差分仿真方法:基于多相场模型仿真获得的多晶材料模型计算获得介电张量分布,通过有限差分法计算获得电场分布。基于本研究的仿真方法仿真分析了晶体各向异性、晶粒度、晶界厚度等对多晶材料内电场强度分布的影响,电场集中现象随着晶体各向异性程度增加、晶粒度增加、晶界厚度减小而变得更加严重。It is of great significance to establish a method of simulating the effect of the micro-nonuniformity of the polycrystal on the distribution of the electric field. The author proposed a finite difference simulating method of the distribution of electric filed in polycrystalline materials based on the phase-field simulated model. The distribution of the dielectric tensor was built based on the phase-field simulated polycrystal model firstly, and the distribution of the electric field was calculated by the finite difference method. This paper simulated the effects of the polycrystalline anisotropy, the grain size, and the grain-boundary thickness on the distribution of the electric field strength. The electric field concentration was intensified with the increase of the polycrystalline anisotropy, the increase of the grain size, and the decrease of the grain-boundary thickness.

关 键 词：相场法 多晶体 电场 有限差分 

分 类 号：TB34[一般工业技术—材料科学与工程]