Crack propagation behavior in lead zirconate titanate-based ferroelectric ceramics. Issue 8 (1st June 2020)

• Record Type: Journal Article
• Authors: Xu, Jiageng; Xie, Shaoxiong; Xu, Qian; Wang, Qingyuan; Chen, Yu
• Is Part Of: Ceramics international. Volume 46:Issue 8(2020)Part B
• Page Start: 12430
• Page End: 12436
• Publication Date: 2020-06-01
• Subjects: PZT ceramics -- Fracture toughness -- Crack propagation -- Media environment -- Weibull statistics; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.02.005
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, Vickers indentation was utilized to characterize the crack propagation anisotropy of Nb/Ce co-doped Pb(Zr0.52 Ti0.48 )O3 (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 °C to 205 °C), the fracture toughness of PZT-NC ceramics dramatically decreases, which is attributed to the decrease in ferroelastic switching ( K sh ).