Numerical calculations on thermodynamic parameters in solidification and average grain sizes of bulk nanocrystalline Fe3Al based alloys prepared by aluminothermic reaction casting

doi:10.1166/nnl.2013.1606

	Numerical calculations on thermodynamic parameters in solidification and average grain sizes of bulk nanocrystalline Fe3Al based alloys prepared by aluminothermic reaction casting
	La, Peiqing; Guo, Xin; Lu, Xuefeng; Zhang, Dan; Wang, Hong Ding; Wei, Yupeng
	2013-07-01
发表期刊	Nanoscience and Nanotechnology Letters
ISSN	19414900
卷号	5 期号:7 页码:719-725
摘要	Numerical calculations on thermodynamic parameters in solidification of homogeneous nucleation and the effects of alloying elements on average grain sizes in bulk nanocaystalline Fe3Al based alloys prepared by aluminothermic reaction casting were conducted. As the undercooling increases from 100 K to 400 K, the critical activation energy of solidification drops dramatically and the critical radius of nucleus decreases from 2.3 nm to 0.5 nm. The thermodynamic driving force of nucleation increases from 100 MJ·m-3 to 600 MJ·m-3, but the nucleation rate changes little until the undercooling comes to 300 K and subsequently shows a significant change, increasing rapidly to 9.6×1021 m -3 ·s-1. Calculated average grain sizes decrease gradually from 568 nm to 68 nm as the undercooling increases from 300 K to 500 K for the alloy with 5 wt.%Cr, while decrease first and then increase for the alloys with 10 wt.% and 15 wt.%Cr, and increase continuously for the alloy with 20 wt.%Cr. Calculated average grain sizes decrease through the sequence of Mn, Cr, Mo, and Ni alloying elements, respectively, and fall into the scope of 9 to 73 nm, which are well in accordance with the experimental data. Copyright © 2013 American Scientific Publishers All rights reserved.
关键词	Activation energy Alloying Alloying elements Alloys Aluminum Aluminum metallography Computer simulation Nucleation Solidification Thermodynamics Undercooling Al-based alloys Aluminothermic reactions Average grain size Homogeneous nucleation Nanocrystallines Numerical calculation Thermodynamic driving forces Thermodynamic parameter
DOI	10.1166/nnl.2013.1606
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000320908800001
出版者	American Scientific Publishers, 25650 North Lewis Way, Stevenson Ranch, California, 91381-1439, United States
EI入藏号	20133716741560
EI主题词	Iron alloys
EI分类号	933 Solid State Physics - 801.4 Physical Chemistry - 723.5 Computer Applications - 933.1.2 Crystal Growth - 641.1 Thermodynamics - 541.1 Aluminum - 531.1 Metallurgy - 545.3 Steel
来源库	Compendex
分类代码	933 Solid State Physics - 801.4 Physical Chemistry - 723.5 Computer Applications - 933.1.2 Crystal Growth - 641.1 Thermodynamics - 541.1 Aluminum - 531.1 Metallurgy - 545.3 Steel
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112901
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	La, Peiqing
作者单位	Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	La, Peiqing,Guo, Xin,Lu, Xuefeng,et al. Numerical calculations on thermodynamic parameters in solidification and average grain sizes of bulk nanocrystalline Fe3Al based alloys prepared by aluminothermic reaction casting[J]. Nanoscience and Nanotechnology Letters,2013,5(7):719-725.
APA	La, Peiqing,Guo, Xin,Lu, Xuefeng,Zhang, Dan,Wang, Hong Ding,&Wei, Yupeng.(2013).Numerical calculations on thermodynamic parameters in solidification and average grain sizes of bulk nanocrystalline Fe3Al based alloys prepared by aluminothermic reaction casting.Nanoscience and Nanotechnology Letters,5(7),719-725.
MLA	La, Peiqing,et al."Numerical calculations on thermodynamic parameters in solidification and average grain sizes of bulk nanocrystalline Fe3Al based alloys prepared by aluminothermic reaction casting".Nanoscience and Nanotechnology Letters 5.7(2013):719-725.