Domain switching toughening in a LiTaO3 dispersed Al2O3 ceramic composite

被引：20

作者：

Liu, YG ^{[1
]}

Zhou, Y ^{[1
]}

Jia, DC ^{[1
]}

Meng, QC ^{[1
]}

Chen, YH ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

SCRIPTA MATERIALIA | 2002年 / 47卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Al2O3; toughening mechanism; domain switching; LiTaO3;

D O I：

10.1016/S1359-6462(02)00090-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Coexisting LiTaO3/Al2O3 ceramic composite was hot pressed at 1573 K. The highest values of flexural strength and fracture toughness reached 492.9 MPa and 5.3 MPa m(1/2), respectively, for the composite containing 15 vol.% LiTaO3. Domain switching which was clearly discerned near the crack tip in LiTaO3 grains is suggested as a new toughening mechanism in structural ceramics. (C) 2002 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc.

引用

页码：63 / 68

页数：6

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