Crack propagation behavior in lead zirconate titanate-based ferroelectric ceramics

被引：1

作者：

Xu, Jiageng ^{[1
]}

Xie, Shaoxiong ^{[2
]}

Xu, Qian ^{[2
]}

Wang, Qingyuan ^{[2
,3
,4
]}

Chen, Yu ^{[3
]}

机构：

[1] Chengdu Univ, Sch Architecture & Civil Engn, Chengdu 610106, Peoples R China

[2] Sichuan Univ, Coll Architecture & Environm, MOE Key Lab Deep Earth Sci & Engn, Chengdu 610065, Peoples R China

[3] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China

[4] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 08期

基金：

中国博士后科学基金;

关键词：

PZT ceramics; Fracture toughness; Crack propagation; Media environment; Weibull statistics; STRESS-CORROSION CRACKING; R-CURVE; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; WATER PENETRATION; FLEXURAL STRENGTH; ANISOTROPY; GROWTH;

D O I：

10.1016/j.ceramint.2020.02.005

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, Vickers indentation was utilized to characterize the crack propagation anisotropy of Nb/Ce co-doped Pb(Zr0.52Ti0.48)O-3 (ab. PZT-NC) ceramics in different media environments and under varying temperatures. Three-point bending associated with Weibull statistics was used to further evaluate the fracture properties. The results demonstrate that PZT-NC ceramics have the best fracture toughness in silicone oil and the worst in air. The fracture toughness and flexural strength of poled PZT-NC ceramics have significant anisotropy due to ferroelastic toughening (K-sh) with crack propagation. Parallel to the poling direction, the fracture toughness and reliability of the flexural strength of poled PZT-NC ceramics are higher. As the temperature increases (from 25 degrees C to 205 degrees C), the fracture toughness of PZT-NC ceramics dramatically decreases, which is attributed to the decrease in ferroelastic switching (K-sh).

引用

页码：12430 / 12436

页数：7

共 50 条

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