PHASE FIELD SIMULATION OF DOMAIN SWITCHING IN FERROELECTRIC SINGLE CRYSTAL WITH ELECTRICALLY PERMEABLE AND IMPERMEABLE CRACKS |
| |
Authors: | Hua Qiao Jie Wang Weiqiu Chen |
| |
Institution: | Department of Engineering Mechanics, Zhejiang University, Yuquan Campus,Hangzhou 310027, China |
| |
Abstract: | Domain switching around electrically permeable and impermeable cracks in ferro-electric single crystals subjected to a mechanical load is investigated by using a phase field model.It is found that the electrical boundary conditions have little effect on the polarization distribution without any external load when the initial polarization is parallel to the crack,which is totally different from previous studies where the initial polarization is perpendicular to the crack.How-ever,the simulation results show that the electrical boundary conditions have great influence on the polarization distribution as well as the domain switching behavior when a mechanical load is applied.The critical mechanical load of domain switching with a permeable crack is much smaller than that in the case of an impermeable crack. |
| |
Keywords: | ferroelectric ceramics impermeable crack domain switching phase field model |
本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录! |