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	Interdiffusion in liquid Al-Cu and Ni-Cu alloys
	Cheng, H. ; Lue, Y. J. ; Chen, M.
	2010-10-12 ; 2010-10-12
关键词	aluminium alloys chemical interdiffusion copper alloys dendrites liquid alloys liquid metals liquid theory molecular dynamics method nickel alloys solidification undercooling MAXWELL-STEFAN DIFFUSION MOLECULAR-DYNAMICS MULTICOMPONENT DIFFUSION DARKEN RELATION MD SIMULATIONS SOLIDIFICATION COEFFICIENTS MIXTURES METALS FE Physics, Atomic, Molecular & Chemical
中文摘要	The interdiffusion processes in liquid Al-Cu and Ni-Cu alloys are studied by using molecular dynamics simulation method. The Maxwell-Stefan (MS) diffusivities are calculated over a wide composition range with both the Green-Kubo method and the Darken relation. Comparisons show that the Darken relation predicts well the MS diffusivity for Ni-Cu alloy, while overestimates the value for Al-Cu alloy, especially in the medium concentration region. Based on the calculated MS diffusivities and the activities of the alloys, the Fickian interdiffusivities are predicted. The results show strong dependences on the compositions of the alloys. In addition, the Fickian interdiffusivities of Al60Cu40 and Ni50Cu50 melts as a function of undercooling are estimated, which is proved to be beneficial in improving the quantitative predictions of dendrite growth velocity in solidification.
语种	英语 ; 英语
出版者	AMER INST PHYSICS ; MELVILLE ; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79207]
专题	清华大学
推荐引用方式 GB/T 7714	Cheng, H.,Lue, Y. J.,Chen, M.. Interdiffusion in liquid Al-Cu and Ni-Cu alloys[J],2010, 2010.
APA	Cheng, H.,Lue, Y. J.,&Chen, M..(2010).Interdiffusion in liquid Al-Cu and Ni-Cu alloys..
MLA	Cheng, H.,et al."Interdiffusion in liquid Al-Cu and Ni-Cu alloys".(2010).

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