Conversion from β-Ce2O3•11Al2O3 to α-Al2O3 in tetragonal ZrO2 matrix

被引：13
|
作者：
Tsukuma, K [1 ]
机构：
[1] New Energy & Ind Technol Dev Org NEDO, Ind Technol Dept, Tokyo 1706028, Japan
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2000年 / 83卷 / 12期
关键词：
Alumina - Annealing - Bending strength - Crystal microstructure - Grain size and shape - High temperature effects - Oxygen - Phase transitions - Sintering - Zirconia;
D O I：
10.1111/j.1151-2916.2000.tb01711.x
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：
Composites of beta -Ce2O3. 11Al(2)O(3) and tetragonal ZrO2 fabricated by a reductive atmosphere sintering of mixed powders of CeO2, ZrO2 (2 mol % Y2O3), and Al2O3. The composites had microstructures composed of elongated grains of beta -Ce2O3. 11Al(2)O(3) in a Y-TZP matrix. The beta -Ce2O3. 11Al(2)O(3) decomposed to alpha -Al2O3 and CeO2 by annealing at 1500 degreesC for 1 h in oxygen. The elongated single grain of beta -Ce2O3. 11Al(2)O(3) divided into several grains of alpha -AI(2)O(3) and ZrO2 doped with Y2O3 and CeO2. High-temperature bending strength of the oxygen-annealed alpha -Al2O3 composite was comparable to the beta -Ce2O3 . 11AI(2)O(3) composite before annealing.
引用
收藏
页码：3219 / 3221
页数：3
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