Using directional solidification to determine solid/liquid equilibria in multicomponent phase diagrams

被引:8
|
作者
Zhao, G [1 ]
Rettenmayr, M [1 ]
机构
[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany
关键词
directional solidification; phase diagram; tie-line;
D O I
10.1016/j.jcrysgro.2005.02.056
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
An experimental method to determine solid/liquid equilibria (tie-lines) in multicomponent alloys has been optimized. A sequence of tie-lines along the solidification path of an alloy can be determined with a single experiment. The method is based on directional solidification in the presence of strong forced convection. A combination of measurements of concentration profiles with mass balance calculations is used to determine liquidus and solidus concentrations. The experimental and evaluation methods are validated using alloys of well-known binary Al-based systems. It is shown that the conditions necessary for the experiment were achieved with the presented set-up. Good agreement is found for the binary test cases; effects that only occur in higher component alloys were observed in a quinary alloy. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:540 / 550
页数:11
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