Eutectic growth behavior with regular arrangement in the faceted Al2O3/Er3Al5O12 irregular eutectic system at low growth rate

被引：13
|
作者：
Ren, Qun [1 ]
Su, Haijun [1 ]
Zhang, Jun [1 ]
Liu, Haifang [1 ]
Zhao, Di [1 ]
Fan, Guangrao [1 ]
Guo, Min [1 ]
Liu, Lin [1 ]
Fu, Hengzhi [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Directional solidification; Laser floating zone melting; Oxide composite; Regular arrangement; HALO FORMATION; MICROSTRUCTURE; CERAMICS; SOLIDIFICATION;
D O I：
10.1016/j.scriptamat.2018.10.030
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Eutectic growth with regular arrangement (RA) is generally formed in directionally solidified alumina base eutectic in situ composites under high growth rates. In this work, the eutectic growth with RA structure is also observed at low growth rate in Al2O3/Er3Al5O12 composite. The RA structure is formed near primary Al2O3 dendrite in Al2O3/Er3Al5O12 hypoeutectic. Eutectic instabilities especially the single-phase instability lead to the primary Al2O3 phase/dendrite precipitation, and Er3Al5O12 phase nucleated on the Al2O3 substrate is considered as a probable reason of RA structure formation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：49 / 53
页数：5
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