3Y-TZP ceramics toughened by Sr2Nb2O7 secondary phase

被引：34

作者：

Chen, XM ^{[1
]}

Liu, XQ

Liu, F

Zhang, XB

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Inst Mat Phys & Microstruct, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 04期

关键词：

ferroelectric properties; Sr2Nb2O7; toughening; ZrO2;

D O I：

10.1016/S0955-2219(00)00237-5

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：

3 mol% yttria stabilized tetragonal zirconia ceramics (3Y-TZP) were significantly toughened by a Sr2Nb2O7 ferroelectric secondary phase incorporated into the matrix to serve as toughening agent. A high K-IC value, 13.0 MPa.m(1/2) was achieved in 1 mol% Sr2Nb2O7 composite ceramics, while that of the 3Y-TZP matrix was 6.0 MPa.m(1/2). Energy transformation and consumption due to piezoelectric effects and domain wall motion was suggested as an important toughening mechanism along with that of phase transformation toughening. Moreover, it should be emphasized that a high K-IC value of 12.0 MPa.m(1/2) was achieved in the present composite ceramics even where the transformation toughening mechanism was inactive. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：477 / 481

页数：5

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