Orientation selection process during the early stage of cubic dendrite growth: A phase-field crystal study

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	Orientation selection process during the early stage of cubic dendrite growth: A phase-field crystal study
	Tang, S ; Wang, ZJ ; Guo, YL ; Wang, JC ; Yu, YM ; Zhou, YH
刊名	ACTA MATERIALIA
	2012
卷号	60 期号:15 页码:5501
关键词	INTERFACIAL PATTERN-FORMATION METAL NANOPARTICLES MORPHOLOGY CONTROL SNOW CRYSTALS SOLIDIFICATION DIFFUSION MODEL SHAPE INSTABILITIES NANOCRYSTALS
ISSN号	1359-6454
通讯作者	Wang, JC (reprint author), NW Polytech Univ, State Key Lab Solidificat Proc, Youyi Western Rd 127, Xian 710072, Peoples R China.
中文摘要	Using the phase-field crystal model, we investigate the orientation selection of the cubic dendrite growth at the atomic scale. Our simulation results reproduce how a face-centered cubic (fcc) octahedral nucleus and a body-centered cubic (bcc) truncated-rhombic dodecahedral nucleus choose the preferred growth direction and then evolve into the dendrite pattern. The interface energy anisotropy inherent in the fcc crystal structure leads to the fastest growth velocity in the < 100 > directions. New {111} atomic layers prefer to nucleate at positions near the tips of the fcc octahedron, which leads to the directed growth of the fcc dendrite tips in the < 100 > directions. A similar orientation selection process is also found during the early stage of bcc dendrite growth. The orientation selection regime obtained by phase-field crystal simulation is helpful for understanding the orientation selection processes of real dendrite growth. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
收录类别	SCI
资助信息	Nature Science Foundation of China [10974228, 51071128]; National Basic Research Program of China [2011CB610401]; fund of the State Key Laboratory of Solidification Processing in NWPU [SKLSP201001]; Program for New Century Excellent Talents in University; Doctorate Foundation of Northwestern Polytechnical University [CX201106]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50462]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Tang, S,Wang, ZJ,Guo, YL,et al. Orientation selection process during the early stage of cubic dendrite growth: A phase-field crystal study[J]. ACTA MATERIALIA,2012,60(15):5501.
APA	Tang, S,Wang, ZJ,Guo, YL,Wang, JC,Yu, YM,&Zhou, YH.(2012).Orientation selection process during the early stage of cubic dendrite growth: A phase-field crystal study.ACTA MATERIALIA,60(15),5501.
MLA	Tang, S,et al."Orientation selection process during the early stage of cubic dendrite growth: A phase-field crystal study".ACTA MATERIALIA 60.15(2012):5501.