Introduction of low strain energy GdAlO3 grain boundaries into directionally solidified Al2O3/GdAlO3 eutectics

doi:10.1016/j.actamat.2021.117355

IMR OpenIR

	Introduction of low strain energy GdAlO3 grain boundaries into directionally solidified Al2O3/GdAlO3 eutectics
	Wang, Xu 1; Zhang, Wen 1; Zhong, Yujie 2; Sun, Luchao 3; Hu, Qiaodan 4; Wang, Jingyang 3
通讯作者	Wang, Xu(xwang@alum.imr.ac.cn) ; Zhong, Yujie(yjzhong@xsyu.edu.cn) ; Hu, Qiaodan(qdhu@sjtu.edu.cn)
	2021-12-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	221 页码:11
摘要	In order to tune the mechanical properties of the Al2O3/GdAlO3 (GAP) eutectic ceramics, low energy GAP grain boundaries (GBs) were introduced into Al2O3/GAP eutectic ceramics. We prepared single-crystal Al2O3/bi-crystal GAP eutectic ceramics with the directional solidification technique, in which the Al2O3 was single-crystal, but the GAP was bi-crystal. The crystallographic orientation relationships between Al2O3 and GAP was determined as [10 (1) over bar0] Al2O3 parallel to [001] GAP-I parallel to [1 (1) over bar0]GAP-II, (11 (2) over bar0) Al2O3 parallel to (200) GAP-I, (11 (2) over bar0) Al2O3 parallel to (112) GAP-II, and (110) GAP-I parallel to (110) GAP-II. Such GAP GB had ultra-low strain energy. The phase boundaries (PBs) strain energies are higher than that of the GAP GB. However, the difference in the interfacial strain energy between the two PBs was quite small. The reason for the successful preparation of single-crystal Al2O3/bi-crystal GAP eutectic ceramics was attributed to almost the same driving force requirements for the two PBs during solidification. We envisaged that the concept of interfacial structure design could open new pathways for high-performance materials design. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Directional solidification Interface structure Low energy defects Low strain energy grain boundary
资助者	National Natural Science Foundation of China
DOI	10.1016/j.actamat.2021.117355
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52171046] ; National Natural Science Foundation of China[51804252] ; National Natural Science Foundation of China[51922068]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000715042300005
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/167194
专题	中国科学院金属研究所
通讯作者	Wang, Xu; Zhong, Yujie; Hu, Qiaodan
作者单位	1.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China 2.Xian Shiyou Univ, Sch Mat Sci & Engn, Xian 710065, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xu,Zhang, Wen,Zhong, Yujie,et al. Introduction of low strain energy GdAlO3 grain boundaries into directionally solidified Al2O3/GdAlO3 eutectics[J]. ACTA MATERIALIA,2021,221:11.
APA	Wang, Xu,Zhang, Wen,Zhong, Yujie,Sun, Luchao,Hu, Qiaodan,&Wang, Jingyang.(2021).Introduction of low strain energy GdAlO3 grain boundaries into directionally solidified Al2O3/GdAlO3 eutectics.ACTA MATERIALIA,221,11.
MLA	Wang, Xu,et al."Introduction of low strain energy GdAlO3 grain boundaries into directionally solidified Al2O3/GdAlO3 eutectics".ACTA MATERIALIA 221(2021):11.