Phase Composition, Microstructure and Electrical Properties of Alumina-Zirconia Eutectic Composites

被引：2
|
作者：
Cicka, R. [1 ]
Trnovcova, V. [1 ,2 ]
Starostin, M. Yu [3 ]
机构：
[1] Slovak Univ Technol, Fac Mat Sci & Technol, Dept Phys, SK-91724 Trnava, Slovakia
[2] Slovak Acad Sci, Inst Phys, SK-84228 Bratislava, Slovakia
[3] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
来源：
IONICS | 2002年 / 8卷 / 3-4期
关键词：
D O I：
10.1007/BF02376084
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Oxide eutectic composites prepared by a directional solidification are noticeable for their good mechanical properties and high temperature stability in oxidizing environments. In this paper we study the influence of stabilizers (Y, Sc) on the phase composition, microstructure and electrical properties of Al2O3 - ZrO2 eutectic composites. At a hypereutectic composition of the melt, we have prepared the composites with tetragonal ZrO2, which possesses conductivities comparable to those of the composites containing cubic ZrO2. An addition of Sc2O3 improves the ionic conductivity of the Al2O3 - (Y2O3) ZrO2 eutectic composite at high temperatures. Both the microstructure and ionic conductivity do not change along the composite (grown at a constant growth rate).
引用
收藏
页码：314 / 320
页数：7
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