Abstract New lamellar Al2O3/ZrO2 (Y2O3) eutectics were obtained using seeding melt-grown method. The orientation relationship and interface structure of the eutectics were investigated by means of transmission Kikuchi diffraction and transmission electron microscopy. The unusual orientation relationship of the new Al2O3/ZrO2 (Y2O3) eutectics was (1 0 1 2 ¯ )Al2O3|| ( 1 1 ¯ 1)ZrO2and [0 2 2 ¯ 1]Al2O3|| [1 1 2]ZrO2 and the interface plane was (1 0 1 2 ¯ )Al2O3|| ( 1 1 ¯ 1)ZrO2with a 4.32% misfit. Furthermore, the possible preferred growth directions on the interface were predicted, which were uncommon low index directions. These results indicate that the interface structure is the leading factor of the growth behavior in binary eutectics. It can be demonstrated that the seeding melt-grown method offers a pathway to tailor the interface and growth direction of the directionally solidified eutectics.

中文翻译：

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晶种熔生长法制备新型层状Al2O3/ZrO2(Y2O3)共晶

摘要 采用晶种熔融生长法制备了新型层状Al2O3/ZrO2(Y2O3)共晶。通过透射菊池衍射和透射电子显微镜研究了共晶的取向关系和界面结构。新的 Al2O3/ZrO2 (Y2O3) 共晶的异常取向关系为 (1 0 1 2 ¯ )Al2O3|| ( 1 1¯ 1)ZrO2 和 [0 2 2¯ 1]Al2O3|| [1 1 2]ZrO2 和界面平面为 (1 0 1 2¯ )Al2O3|| ( 1 1 ¯ 1)ZrO2 具有 4.32% 的失配。此外，预测了界面上可能的优选生长方向，这是不常见的低指数方向。这些结果表明界面结构是二元共晶生长行为的主导因素。