Study of directionally solidified eutectic Al2O3-ZrO2 (3%Y2O3) doped with TiO2

被引：5

作者：

Diez, J. C. ^{[1
]}

Madre, M. A. ^{[1
]}

Sotelo, A. ^{[1
]}

Pena, J. I. ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Aragon, UZ, Dpto Ciencia & Tecnol Mat & Fluidos, Zaragoza 50018, Spain

来源：

BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO | 2007年 / 46卷 / 03期

关键词：

Al2O3-ZrO2; eutectic; directional solidification; TiO2; doping;

D O I：

10.3989/cyv.2007.v46.i3.242

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：

An study of directionally grown samples of the eutectic composition in the Al2O3-ZrO2 (3 mol% Y2O3) system, with small TiO2 additions (1 wt%), is presented. The microstructural changes induced by this addition are analysed using SEM (EDX) tec hniques. The mechanical changes, when TiO2 is added, are studied by measuring the flexural strength by three point bending. Also, the toughness is determined by Vickers indentation method. When slow growth rates (10 mm/h) are used, interpenetratred and homogeneous microstructure is obtained, independently of the TiO2 doping. When growth rates are higher (300 and 1000 mm/h) the structure changes and the phases are organized in form of colonies or cells, which have smaller size when TiO2 is present. This size reduction is accompanied with an increase of the toughness.

引用

页码：119 / 122

页数：4

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