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利用数字图像相关性分析方法发展了全场应变光学测量技术,并原位实时测量了准静态单轴压缩下铁电PZT95/5陶瓷试件的轴向应变和横向应变.基于轴向应变、横向应变随着轴向应力的变化关系,讨论了极化状态和极化方向对PZT95/5铁电陶瓷的畴变与相变行为的影响.实验结果显示:单轴压缩下,未极化和Z轴极化PZT95/5铁电陶瓷都会发生畴变,而Y轴极化PZT95/5铁电陶瓷则不发生畴变;畴变促使Z轴极化PZT95/5铁电陶瓷的轴向应变和横向应变同时快速地增长,而对未极化PZT95/5铁电陶瓷的应变增长的影响非常微弱,这种差异性归因于电畴极轴不同的取向分布特征;通过应变分解分析,验证了畴变与相变过程是解耦的,并界定了畴变应变和相变应变的影响范围;与Z轴极化PZT95/5铁电陶瓷相比,未极化PZT95/5铁电陶瓷的相变开始临界应力和相变结束应力减小,而Y轴极化PZT95/5铁电陶瓷则明显增大,由此推论畴变对相变有一定促进作用.基于放电特性的实测结果,还讨论了极化方向对极化PZT95/5铁电陶瓷去极化机理的影响.实验结果显示:Z轴极化PZT95/5铁电陶瓷去极化机理是畴变和相变的共同作用,其中畴变占主导地位,而Y轴极化PZT95/5铁电陶瓷的去极化机理仅是相变.
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关键词:
- PZT95/5铁电陶瓷 /
- 畴变 /
- 相变 /
- 极化状态与方向
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[11] Setchell R E 2007 J. Appl. Phys. 101 053525
[12] Jiang Z X, Xing M Z, Sheng H T, Wang Y G, Nie H C, Liu Y S 2015 Acta Phys. Sin. 64 134601 (in Chinese)[蒋招绣, 辛铭之, 申海艇, 王永刚, 聂恒昌, 刘雨生2015物理学报64 134601]
[13] Sutton M A, Orteu J J, Schreier H W 2009 Image Correlation for Shape, Motion, and Deformation Measurements (New York:Springer) p81
[14] Yang W 2000 Mechatronic Reliability p87(Beijing:Press of University of Tsinghua) (in Chinese)[杨卫2000力电失效学(北京:清华大学出版社)第87页]
[15] Okayasu M, Sato K, Kusaba Y 2011 J. Eur. Ceram. Soc. 31 129
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[1] Haertling G H 1999 J. Am. Ceram. Soc. 82 797
[2] Wang Y L 2003 Properties and Application of Functional Ceramics (Beijing:Science Press) p54(in Chinese)[王永龄 2003功能陶瓷性能与应用(北京:科学出版社)第54页]
[3] Okayasu M, Sato K, Mizuno M 2011 J. Eur. Ceram. Soc. 31 141
[4] Li Y J, Rogan R C, stndag E, Bhattacharya K 2005 Nat. Mater. 4 776
[5] Jones J L, Hoffman M, Vogel S C 2007 Mech. Mater. 39 283
[6] Okayasu M, Sugiyama E, Mizuno M 2010 J. Eur. Ceram. Soc. 30 1445
[7] Tuttle B A, Yang P, Gieske J H, Voigt J A, Scofield T W, Zeuch D H, Olson W R 2001 J. Am. Ceram. Soc. 84 1260
[8] Setchell R E 2003 J. Appl. Phys. 94 573
[9] Zhang F P, He H L, Liu G M, Yu Y, Wang Y G 2013 J. Appl. Phys. 113 183501
[10] Feng N B, Gu Y, Liu Y S, Nie H C, Chen X F, Wang G S, He H L, Dong X L 2010 Acta Phys. Sin. 59 8897 (in Chinese)[冯宁博, 谷岩, 刘雨生, 聂恒昌, 陈学锋, 王根水, 贺红亮, 董显林2010物理学报59 8897]
[11] Setchell R E 2007 J. Appl. Phys. 101 053525
[12] Jiang Z X, Xing M Z, Sheng H T, Wang Y G, Nie H C, Liu Y S 2015 Acta Phys. Sin. 64 134601 (in Chinese)[蒋招绣, 辛铭之, 申海艇, 王永刚, 聂恒昌, 刘雨生2015物理学报64 134601]
[13] Sutton M A, Orteu J J, Schreier H W 2009 Image Correlation for Shape, Motion, and Deformation Measurements (New York:Springer) p81
[14] Yang W 2000 Mechatronic Reliability p87(Beijing:Press of University of Tsinghua) (in Chinese)[杨卫2000力电失效学(北京:清华大学出版社)第87页]
[15] Okayasu M, Sato K, Kusaba Y 2011 J. Eur. Ceram. Soc. 31 129
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