An Al2O3/Y3Al5O12 eutectic ceramic was prepared with a c-axis sapphire seed by an optical floating zone furnace. The crystallographic relationships in the initial and the steady growth sections of the as-grown eutectic ceramic were investigated by electron backscattering diffraction and transmission electron microscopy. The corresponding results were: {101}Y3Al5O12 || {112¯0}Al2O3 and {21¯1}Y3Al5O12 || {0001}Al2O3, respectively. The steady orientation of the latter one shows smaller planar disregistry. Interfacial strain played the decisive role in affecting the solidification behavior of the Al2O3/Y3Al5O12 eutectic ceramic. The stability of interfaces with minimum interfacial strain and better ionic charge balance in irregular microstructure prevail upon the constraint of the seed. These results might cast light for the interfacial design of the Al2O3/Y3Al5O12 binary eutectic ceramic. This article is protected by copyright. All rights reserved.

中文翻译：

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界面能对定向凝固Al2O3/YAG共晶陶瓷微观结构的影响

采用光浮区炉以c轴蓝宝石晶种制备Al2O3/Y3Al5O12共晶陶瓷。通过电子背散射衍射和透射电子显微镜研究了生长的共晶陶瓷的初始和稳定生长部分的晶体学关系。相应的结果是：{101}Y3Al5O12 || {112¯0}Al2O3 和 {21¯1}Y3Al5O12 || {0001}Al2O3，分别。后一个的稳定方向显示出较小的平面失配。界面应变在影响Al2O3/Y3Al5O12共晶陶瓷的凝固行为中起决定性作用。在不规则微观结构中具有最小界面应变和更好的离子电荷平衡的界面的稳定性取决于种子的约束。这些结果可能对 Al2O3/Y3Al5O12 二元共晶陶瓷的界面设计有所启发。本文受版权保护。版权所有。