Anomalous dendrite growth in undercooled melts of Al-Ni alloys in relation to results obtained in reduced gravity

被引：28

作者：

Lengsdorf, R. ^{[1
,2
]}

Holland-Moritz, D. ^{[1
]}

Herlach, D. M. ^{[1
]}

机构：

[1] Deutsch Zentrum Luft & Raumfahrt, Inst Mat Phys Weltraum, DLR, D-51147 Cologne, Germany

[2] Ruhr Univ Bochum, Inst Festkorperphys, D-44780 Bochum, Germany

来源：

SCRIPTA MATERIALIA | 2010年 / 62卷 / 06期

关键词：

Crystal growth; Rapid solidification; Nickel aluminides; Microgravity; SOLIDIFICATION;

D O I：

10.1016/j.scriptamat.2009.10.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dendrite growth velocities are measured as it function of undercooling oil Al-Ni alloys using electromagnetic levitation, both oil Earth and in reduced gravity Six alloys of various compositions are investigated, one of them for comparative investigations in reduced gravity Whereas oil the Ni-rich side, growth velocity increases with increasing undercooling, Al-rich alloys show an unusual decrease in growth velocity with increasing undercooling Experiments in reduced gravity suggest that this anomalous behavior is caused by forced convection (C) 2009 Acta Materialia Inc Published by Elsevier Ltd All rights reserved.

引用

页码：365 / 367

页数：3

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