Nano-scale dendrites within the conventional dendritic arm

doi:10.1016/j.matdes.2021.110263

CORC > 金属研究所 > 中国科学院金属研究所

	Nano-scale dendrites within the conventional dendritic arm
	Ma, Xiaoping; Liu, Hongwei; Fu, Paixian; Li, Dianzhong
刊名	MATERIALS & DESIGN
	2021-12-15
卷号	212 页码:9
关键词	Solidification Dendrite Microstructures Microsegregation Macrosegregation Multi-scales
ISSN号	0264-1275
DOI	10.1016/j.matdes.2021.110263
通讯作者	Ma, Xiaoping(xpma@imr.ac.cn)
英文摘要	The microstructures and segregations during solidification have been widely recognized in the past researches. The dendrite (termed as conventional dendrite in this paper) was recognized as the most basic entity for microstructures and microsegregation. Through careful analysis and observation in this paper, new nano-scale dendrites (with dendritic arm spacing about 500 nm) were revealed within the conventional dendritic arm (with dendritic arm spacing about 70 mu m). The conventional dendrites should be recognized as macrosegregation patterns arisen in a subtle porous media. Accordingly, the research entity for microsegregation should change from the conventional dendritic arm to a more subtle entity. During solidification, temperature fluctuations with different directions, periods and intensities will superimpose to induce a dendritic temperature field on multi-scales. Because of differentiated solid frac-tions and liquid compositions, a dendritic macrosegregation field on multi-scales will be induced by the mass transfer. Verified by the in situ and real time observation, the subtle dendrites emerge at the later solidification stage much lower than the equilibrium eutectic temperature. Because nano-scale dendrites were recognized, new solutions were proposed for controlling macrosegregation within the conventional dendritic arm. In a more significant view, the nano-scale dendrites provide the basis for unifying the non-equilibrium solidification and the equilibrium solidification. (C) 2021 The Authors. Published by Elsevier Ltd.
资助项目	Youth Talent Project of Shenyang National Laboratory for Materials Science[L2019F46] ; Youth Talent Project of Shenyang National Laboratory for Materials Science[TC190A4DA/35]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000744257300007
资助机构	Youth Talent Project of Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173623]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma, Xiaoping
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xiaoping,Liu, Hongwei,Fu, Paixian,et al. Nano-scale dendrites within the conventional dendritic arm[J]. MATERIALS & DESIGN,2021,212:9.
APA	Ma, Xiaoping,Liu, Hongwei,Fu, Paixian,&Li, Dianzhong.(2021).Nano-scale dendrites within the conventional dendritic arm.MATERIALS & DESIGN,212,9.
MLA	Ma, Xiaoping,et al."Nano-scale dendrites within the conventional dendritic arm".MATERIALS & DESIGN 212(2021):9.