Phase Separation in Melts of the ZrO2-Al2O3 System

被引：2
|
作者：
Udalov, Yu. P. [1 ]
Grishchenko, D. V. [1 ]
Kulakov, V. V. [1 ]
Poznyak, I. V. [2 ]
Pechenkov, A. Yu. [2 ]
机构：
[1] Tech Univ, St Petersburg State Inst Technol, St Petersburg 198013, Russia
[2] St Petersburg State Univ Elect Engn, St Petersburg 197376, Russia
来源：
GLASS PHYSICS AND CHEMISTRY | 2008年 / 34卷 / 05期
关键词：
Cooling - Corundum - Aluminum oxide - Zirconia;
D O I：
10.1134/S1087659608050143
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 morphology of the quenched and slowly crystallized samples in the ZrO2-Al2O3 system is investigated in the composition range 25-70 wt % ZrO2. It is revealed that, irrespective of the cooling rate, the samples contain large baddeleyite (or corundum) crystals, eutectic mixtures, and characteristic regions of inter-grown elongated baddeleyite and corundum grains with micron sizes. These regions have the same phase composition at any initial ratio between zirconium and aluminum oxides and at any cooling rates of the melt. A hypothesis is put forward that these regions are products of the decomposition of ZrO2 center dot 2Al(2)O(3) associates.
引用
收藏
页码：623 / 633
页数：11
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