Alumina ceramics toughened by a piezoelectric secondary phase

被引：58

作者：

Yang, B ^{[1
]}

Chen, XM ^{[1
]}

机构：

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

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 11期

关键词：

Al2O3; composites; Nd2Ti2O7; piezoelectric properties; toughness and toughening;

D O I：

10.1016/S0955-2219(00)00049-2

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：

A process for ceramic toughening is developed, where a selected piezoelectric or ferroelectric secondary phase is incorporated and dispersed in a ceramic matrix as reinforcement. The toughening effect of Nd2Ti2O7 secondary phase on Al2O3 ceramic is determined together with the microstructures and phase constitution of the composite ceramics. Dense composite ceramics can be formed with the secondary phase and the Al2O3 matrix. Compared to single phase Al2O3 ceramics, the Nd2Ti2O7/Al2O3 composite ceramic shows a significant increase in fracture toughness, and K-IC reaches 6.7 MPa m(1/2) for a composition of 0.03 Nd2Ti2O7/0.97Al(2)O(3). (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1687 / 1690

页数：4

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