Nanostructure stabilization in electrodeposited Al-Mg dendrites

JOURNAL OF ALLOYS AND COMPOUNDS

卷:694

Article

Tatiparti, Sankara Sarma V.^1,2  Ebrahimi, Fereshteh¹ 

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[2] Indian Inst Technol, Dept Energy Sci & Engn, Bombay 400076, Maharashtra, India

关键词: Al-Mg;    Electrodeposition;    Nanostructure;    Stabilization;    Segregation;   

DOI  :  10.1016/j.jallcom.2016.09.286

来源: Elsevier

【 摘 要 】

Electrodeposited Al-Mg dendrites with globular morphology exhibited core-shell (coarse-fine) type microstructure with grain sizes similar to 100 and similar to 16 nm, respectively. The grain boundary and grain compositions of core are similar to 10 and similar to 6 at.% Mg, respectively. Those of shell are similar to 36 and similar to 20 at.% Mg, respectively. The excess Mg ratio at boundaries of shell and core (Gamma(Mgfine)/Gamma(Mgcoarse)) is 1.17:1. This relative grain, boundary segregation of Mg decreases the grain boundary energy from coarse to fine region and can result in nanostructure stabilization of fine shell at similar to 16 nm. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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