Microstructure of Y2O3 doped Al2O3-ZrO2 eutectics grown by the laser floating zone method

被引：108

作者：

Peña, JI ^{[1
]}

Merino, RI ^{[1
]}

Harlan, NR ^{[1
]}

Larrea, A ^{[1
]}

de la Fuente, GF ^{[1
]}

Orera, VM ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2002年 / 22卷 / 14-15期

关键词：

Al2O3; composites; eutectics; ZrO2(Y2O3);

D O I：

10.1016/S0955-2219(02)00121-8

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：

Al2O3-ZrO2 eutectics containing 9 mol% Y2O3 (with respect to zirconia) were produced by directional solidification using the laser floating zone (LFZ) method. The eutectic microstructures were investigated as a function of the growth variables. Using a solidification-axis thermal gradient of 600 degreesC/mm a homogeneous, colony-free, interpenetrating lamellar microstructure was obtained for growth rates less than 50 mm/h. Higher growth rates produce cellular structures. Colonies grew with the [0001] alumina and the [110] zirconia axis parallel to the growth direction. The uniform lamellar microstructure obtained at low growth rates is stable during thermal treatment at 1500 degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2595 / 2602

页数：8

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