MSP试验法评价PZT陶瓷的循环疲劳寿命

doi:10.3724/SP.J.1077.2012.11803

无机材料学报 ›› 2012, Vol. 27 ›› Issue (10): 1047-1052.DOI: 10.3724/SP.J.1077.2012.11803 CSTR: 32189.14.SP.J.1077.2012.11803

MSP试验法评价PZT陶瓷的循环疲劳寿命

邓启煌¹, 王连军¹, 许虹杰², 王宏志¹, 江莞¹

(1. 东华大学纤维材料改性国家重点实验室, 上海 201620; 2. 上海柯瑞冶金炉料有限公司, 上海 200072)

收稿日期:2011-12-27 修回日期:2012-03-08 出版日期:2012-10-20 网络出版日期:2012-09-17
作者简介:邓启煌(1982–), 男, 博士研究生. E-mail: dengqihuang@mail.dhu.edu.cn
基金资助:
上海市科学技术委员会基础研究重点项目(10JC1400500); 上海市重点学科项目(B603); 航空科学基金(201108M2001)

Fatigue Life Investigation of PZT Ceramics by MSP Method

DENG Qi-Huang¹, WANG Lian-Jun¹, XU Hong-Jie², WANG Hong-Zhi¹, JIANG Wan¹

(1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; 2. Shanghai Career Metallurgy Furnace Materials Co. Ltd., Shanghai 200072, China)

Received:2011-12-27 Revised:2012-03-08 Published:2012-10-20 Online:2012-09-17
About author:DENG Qi-Huang. E-mail: dengqihuang@mail.dhu.edu.cn
Supported by:
Shanghai Science and Technology Committee, Key Project of Foundation Research (10JC1400500); Shanghai Leading Academic Discipline Project (B603); Aeronautical Science Foundation of China Project (201108M2001)

摘要/Abstract

摘要： 采用小样品力学性能试验方法(Modified Small Punch Tests, 简称MSP)对Pb(Zr,Ti)O₃陶瓷(PZT)实施了不同大小应力下的循环疲劳实验, 循环应力越大, 样品的残余强度和压电常数衰减越快, 这是由应力循环过程中大量微裂纹的产生和扩展所致. 通过最大强度值与疲劳寿命的对应关系求得100 Hz循环疲劳下该样品的裂纹扩展指数n为395, 由此推测了PZT陶瓷样品的使用寿命, 在循环应力的最大值不超过79.1 MPa的条件下, 该样品的连续使用寿命可达5年以上.

关键词: PZT陶瓷, 小样品力学性能试验法, 循环疲劳, 声发射

Abstract: The cycle fatigue of PZT ceramic under different stress was investigated by modified small punch (MSP) tests. The research results show that residual strength and piezoelectric constant decrease with increasing cycle stress, which is attributed to crack propagation during cyclic stress process. The value of fatigue crack propagation (n) is calculated to be 395 according to the relationship between maximum stress and fatigue life. The fatigue life under series cycle maximum stress can be induce by fatigue crack propagation. Below the maximum strength of 79.1 MPa, the PZT ceramics can be used over 5 years.

Key words: PZT ceramic, modified small punch test, cycle fatigue, acoustic emission

中图分类号:

TQ032

邓启煌, 王连军, 许虹杰, 王宏志, 江莞. MSP试验法评价PZT陶瓷的循环疲劳寿命[J]. 无机材料学报, 2012, 27(10): 1047-1052.

DENG Qi-Huang, WANG Lian-Jun, XU Hong-Jie, WANG Hong-Zhi, JIANG Wan. Fatigue Life Investigation of PZT Ceramics by MSP Method[J]. Journal of Inorganic Materials, 2012, 27(10): 1047-1052.

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MSP试验法评价PZT陶瓷的循环疲劳寿命

Fatigue Life Investigation of PZT Ceramics by MSP Method

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