南方科技大学知识苑(SUSTech KC): 颗粒学报（英文版）

题名	颗粒学报（英文版）
作者	Yuntao Cai 4; Pengjun Fang 5; Xinggang Li ; Yi Xu
发表日期	2020
发表期刊	Particuology 影响因子和分区
ISSN	1674-2001
卷号	50 期号:3页码:43-52
摘要	Catalytic powders with fine microstructures can be produced from a rapidly solidified gas atomized Al-Ni alloy.The solidification microstructure of the droplets is closely linked with heat flow conditions.Thus,the heat transfer conditions between the gas and droplet are essential to microstructural evolution.In this study,a phase field model for simulating single and multiple dendrite growth in a binary Al-Ni alloy was constructed and the microstructural evolutions occurring during a gas atomization process were evaluated.Temporal variations in the heat transfer coefficient and the boundary heat flux were taken into account.The results revealed that the heat transfer coefficient of the atomized droplet in flight is correlated with the droplet size and the relative velocity between the droplet and the atomizing gas.During the simulation,the competition between boundary heat flux extraction and latent heat release from phase transition causes a recalescence process in thermal history,thereby affecting the gradient temperature distribution and,consequently,the dendrite morphology.Dendrite growth under the effects of the heat transfer coefficient is restrained continuously because of the decreasing amount of extraction.The computational results confirmed the fine homogeneous microstructure and low microsegregation levels of gas atomized powders.
关键词	Numerical simulation Dendrite morphology Solidification Gas atomization
相关链接	[万方记录]
语种	英语
学校署名	其他
资助项目	This project was financially supported by the National Key Project of Research and Development Program of China (2016YFB1100202)
ESI学科分类	MATERIALS SCIENCE
来源库	WanFang
万方记录号	perioarticalzgklxb-e202003006
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/229192
专题	前沿与交叉科学研究院
作者单位	1.School of Materials Science & Engineering, Southwest Jiaotong University, Chengdu 610031, China 2.SUSTech Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China 3.School of Materials Science & Engineering, Southwest Jiaotong University, Chengdu 610031, China;Key Laboratory of Advanced Materials Technology, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China 4.西南交通大学 5.南方科技大学
推荐引用方式 GB/T 7714	Yuntao Cai,Pengjun Fang,Xinggang Li,等. 颗粒学报（英文版）[J]. Particuology,2020,50(3):43-52.
APA	Yuntao Cai,Pengjun Fang,Xinggang Li,&Yi Xu.(2020).颗粒学报（英文版）.Particuology,50(3),43-52.
MLA	Yuntao Cai,et al."颗粒学报（英文版）".Particuology 50.3(2020):43-52.