Effect of zirconia addition on the oxidation resistance of Ni-toughened Al2O3

被引：8
|
作者：
Wang, TC [1 ]
Chen, RZ [1 ]
Tuan, WH [1 ]
机构：
[1] Natl Taiwan Univ, Inst Mat Sci & Engn, Taipei 106, Taiwan
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 05期
关键词：
Al2O3; composites; metallic inclusions; oxidation; ZrO2;
D O I：
10.1016/S0955-2219(03)00337-6
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：
The incorporation of equal amount of Ni and ZrO2 particles can significantly enhance the toughness of Al2O3, In the present study, the oxidation resistance of Al2O3/ZrO2/Ni composites at 1200 degreesC for up to 400 It is evaluated. The presence of ZrO2 particles accelerates the oxidation of Ni particles in the Al2O3 matrix. Furthermore, the oxidation rate constant of the composites increases significantly when the ZrO2 addition is higher than 10 vol.%, the threshold at which that ZrO2 inclusions form continuous networks. The effect of the polymorphic form of ZrO2 on the oxidation resistance is also evaluated. The oxidation resistance of Al2O3/m-ZrO2/Ni composites is slightly better than that of Al2O3/t-ZrO2/Ni composites. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：833 / 840
页数：8
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