PZT 95/5陶瓷电致失效机理研究  

Failure mechanism of PZT 95/5 under direct current and pulsed electric field

作　　者：张福平[1] 杜金梅[1] 刘雨生[1] 刘艺[1] 刘高旻[1] 贺红亮[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,绵阳621900

出　　处：《物理学报》2011年第5期708-712,共5页Acta Physica Sinica

基　　金：冲击波物理与爆轰物理国防科技重点实验室基金(批准号:2010A0201005);中国工程物理研究院科学技术基金(批准号:9140C67020309004)资助的课题~~

摘　　要：对PZT 95/5陶瓷在直流电场、脉冲方波电场以及半正弦波电场作用下的失效机理进行了理论和实验分析.结果表明在直流作用下,其失效机理以热-电耦合失效为主;而在脉冲电场作用下,考虑振动冲击效应以及相关的力谱分布,脉宽越短,能量向高频偏移,越可能发生力-电耦合失效;当脉宽增加,PZT 95/5陶瓷失效机理将从力-电耦合失效逐步转变成直流失效模式.The failure mechanism of PZT 95/5 under direct current and pulsed electric field is studied by experiment and theoretical analysis in this paper.The electrothermal coupled failure is the key mode when the PZT 95/5 is subjected to direct current.But when the pulsed electric field is applied to the PZT 95/5,the resonance effect and the relation between energy and frequency being considered,the vibrant energy shifts to high frequency and the possibility of electromechanical-coupled failure is increased with decreasing pulse duration.When the pulse duration is increased,the failure behavior transfers gradually from mechanical coupled with electric failure to direct current failure mode.

关 键 词：PZT 95/5 失效机理 直流电场 脉冲电场 

分 类 号：TM286[一般工业技术—材料科学与工程]