原位XRD法研究电疲劳过程中铁电陶瓷PLZT的畴变

CORC > 厦门大学 > 材料学院－已发表论文

	原位XRD法研究电疲劳过程中铁电陶瓷PLZT的畴变; IN SITU XRD INVESTIGATION OF DOMAIN SWITCHING IN FERROELECTRIC CERAMICS PLZT DURING AN ELECTRIC FATIGUE PROCESS
	张颖 ; Zhang Ying ; 陈志武 ; CHEN Zhiwu ; 程璇 ; CHENG Xuan ; 张飒 ; ZHANG Sa
刊名	http://epub.cnki.net/grid2008/brief/detailj.aspx?filename=JSXB200412014&dbname=CJFQ2004
	2004-12-11
关键词	PLZT铁电陶瓷 ferroelectric ceramics PLZT 电疲劳 electric fatigue 90°畴变 90° domain reorientation 应变 strain 微裂纹 micro-crack
英文摘要	【中文摘要】利用SEM观察了未疲劳和疲劳铁电陶瓷极化试样的断口形貌.利用原位XRD观测了电疲劳过程中极化试样表面铁电电畴的变化,并记录了相应的剩余极化强度.实验结果表明:疲劳试样的主要断裂模式为沿晶断裂;随疲劳次数的增加,每次疲劳后试样表面I(002)减小,I(200)增加;每次疲劳后在外加电场作用下试样表面I(002)增加幅度和I(200)减小幅度随疲劳次数的增加而减少.这些现象说明:可翻转电畴的减少是剩余极化强度降低的主要原因;非协调高畴变应变形成大量沿晶微裂纹并导致疲劳试样主要断裂模式为沿晶断裂;沿晶微裂纹的形成和伸长主要发生在电疲劳的初期. 【Abstract】 An in situ XRD method was employed to identify variations of electric domains on the surfaces of poled PLZT samples during an electric fatigue process, and simultaneously, the related remnant polarization was measured. The SEM observation revealed that the major fracture mode for fatigued samples is intergranular. The diffraction intensities, I(002) and /I(200), after each cycle decreased and increased, respectively, and their magnitudes of the increment and decrement lowered as the number of cycles increased. It is suggested that the reduction in magnitude of remnant polarization is caused by the reduction in numbers of switch-able domains during a fatigue process. In addition, the incompatible high strain induced the intergranular micro-cracks in the material, which leads the major fracture mode for the fatigued sample to be intergranular. The formation and the elongation of micro-cracks in samples mainly occurred at earlier stage of electric fatigue.
语种	中文
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/55249]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	张颖,Zhang Ying,陈志武,等. 原位XRD法研究电疲劳过程中铁电陶瓷PLZT的畴变, IN SITU XRD INVESTIGATION OF DOMAIN SWITCHING IN FERROELECTRIC CERAMICS PLZT DURING AN ELECTRIC FATIGUE PROCESS[J]. http://epub.cnki.net/grid2008/brief/detailj.aspx?filename=JSXB200412014&dbname=CJFQ2004,2004.
APA	张颖.,Zhang Ying.,陈志武.,CHEN Zhiwu.,程璇.,...&ZHANG Sa.(2004).原位XRD法研究电疲劳过程中铁电陶瓷PLZT的畴变.http://epub.cnki.net/grid2008/brief/detailj.aspx?filename=JSXB200412014&dbname=CJFQ2004.
MLA	张颖,et al."原位XRD法研究电疲劳过程中铁电陶瓷PLZT的畴变".http://epub.cnki.net/grid2008/brief/detailj.aspx?filename=JSXB200412014&dbname=CJFQ2004 (2004).