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
收藏
页码：63 / 68
页数：6
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