In-situ Observation of Crack Growth and Domain Switching Around Vickers Indentation on BaTiO_3 Single Crystal Under Sustained Electric Field  

作　　者：Bing JIANG Yusong LIU Meicheng LI 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,School of Renewable Energy,North China Electric Power University [2]Beijing Sustainable Development Center

出　　处：《Acta Metallurgica Sinica(English Letters)》2013年第6期772-776,共5页金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51072021,51202067,51172069 and 50972032);Ph.D.Programs Foundation of Ministry of Education of China(No.20110036110006);Fundamental Research Funds for the Central Universities(Nos.11ZG02 and12QN15)

摘　　要：The crack propagation and domain switching process around the indentation on the surface of barium titanate single crystal under the external electric field was investigated by atomic force microscope and polarized light microscope. The evolutions of domain switching and crack propagation were in-situ observed when a 90°a- c domain wall moved across the indentation which was driven by external electric field. The results show that the incompatible strain induced by domain switching in the residual stress zone around the indentation is the driving force of the anisotropic crack propagation. The crack propagation results in the changes of the fine domain stripes around the crack tip.The crack propagation and domain switching process around the indentation on the surface of barium titanate single crystal under the external electric field was investigated by atomic force microscope and polarized light microscope. The evolutions of domain switching and crack propagation were in-situ observed when a 90°a- c domain wall moved across the indentation which was driven by external electric field. The results show that the incompatible strain induced by domain switching in the residual stress zone around the indentation is the driving force of the anisotropic crack propagation. The crack propagation results in the changes of the fine domain stripes around the crack tip.

关 键 词：Domain switching INDENTATION Crack propagation BATIO3 AFM 

分 类 号：TM27[一般工业技术—材料科学与工程]