Large anisotropy of fracture toughness in mechanicafly poled/depoled ferroelectric ceramics

被引：13

作者：

Li, Y. W. ^{[1
]}

Li, F. X. ^{[1
,2
]}

机构：

[1] Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, State Key Lab High Performance Ceram Superfine Mi, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

SCRIPTA MATERIALIA | 2010年 / 62卷 / 05期

关键词：

Fracture toughness; Ferroelectric ceramics; Anisotropy; Mechanical poling; ELECTRICAL BOUNDARY-CONDITIONS; PIEZOELECTRIC CERAMICS; INDENTATION; BEHAVIOR; PZT; STRAIN; STATES;

D O I：

10.1016/j.scriptamat.2009.11.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We observed large anisotropy of indentation fracture toughness in both mechanically poled and depoled lead titanate zirconate (PZT) ceramics under uniaxial compression up to 400 MPa. The fracture toughness anisotropy can reach as much as 3.82 in the former and 3.63 in the latter, which are both considerably larger than that of 2.62 in electrically poled PZT ceramics. This phenomenon is thought to be caused by ferroelastic domain switching during indentation and by the existence of more saturated domain orientation textures under compression than under electrical poling. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：313 / 316

页数：4

共 20 条

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