Crystallography and interfacial structure in a directionally solidified Al2O3/Y3Al5O12/ZrO2 eutectic crystal

被引：27

作者：

Wang, Xu ^{[1
]}

Zhong, Yujie ^{[2
]}

Sun, Qian ^{[3
]}

Li, Yiran ^{[4
]}

Zhang, Wen ^{[1
]}

Qi, Dongqing ^{[4
]}

Wang, Dong ^{[5
]}

Jiang, Bailing ^{[1
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, 5 South Jinhua Rd, Xian 710048, Shaanxi, Peoples R China

[2] Xian Shiyou Univ, Sch Mat Sci & Engn, Xian 710065, Shaanxi, Peoples R China

[3] Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China

[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China

[5] Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China

来源：

SCRIPTA MATERIALIA | 2018年 / 145卷

基金：

中国国家自然科学基金;

关键词：

Al2O3/Y3Al5O12/ZrO2 ternary eutectic crystal; Directional solidification; Interface structure; EBSD; HRTEM; MELT-GROWTH COMPOSITES; LASER FLOATING-ZONE; MECHANICAL-PROPERTIES; HIGH-STRENGTH; 1900; K; MICROSTRUCTURE; CERAMICS; OXIDES;

D O I：

10.1016/j.scriptamat.2017.10.008

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The single crystal of Al2O3/Y3Al5O12/ZrO2 ternary eutectic was prepared by an optical floating zone furnace. The crystallography and interfacial structure of the directionally solidified ternary eutectic were investigated by means of electron backscattered diffraction and transmission electron microscopy. We found that the preferred crystallographic orientation of the Al2O3/Y3Al5O12/ZrO2 eutectic crystal was {1120} < 1100 > Al2O3 ||{001} < 001 > Y3Al5O12 ||{001} < 001 > ZrO2. Most of the tiny ZrO2 locates dispersively between Al2O3 and Y3Al5O12. It can be concluded that interfacial energy between Al2O3-Y3Al5O12-ZrO2 played an important role in deciding the preferred crystallographic orientations of the Al2O3/Y3Al5O12/ZrO2 eutectic and the precipitation behavior of the ZrO2 phase. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：23 / 27

页数：5

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