Wetting transition of grain-boundary triple junctions

被引：81
|
作者：
Straumal, B. B. [1 ,2 ]
Kogtenkova, O. [1 ]
Zieba, P. [3 ]
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia
[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[3] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland
来源：
ACTA MATERIALIA | 2008年 / 56卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
grain boundaries; triple junctions; al-zn-mg alloys; wetting phase transition;
D O I：
10.1016/j.actamat.2007.10.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The wetting phase transition of grain boundaries (GBs) and grain-boundary triple junctions (GB Us) by the melt has been studied in the Al-30 wt.%Zn and Al-10 wt.%Zn-4 wt.%Mg polycrystals. The condition of complete wetting is weaker for TJs (sigma(GB) > root 3 sigma(SL)) than that for GBs (sigma(GB) > 2 sigma(SL)), sigma(GB) being the GB energy and 2 sigma(SL) being the energy of the solid/liquid interphase boundary. As a result the temperature of TJ wetting transition should be lower than that of GB wetting transition T-WGB. It has been experimentally observed for the first time that TJs become completely wetted at T-WTJ which is about 10-15 degrees C below T-WGB. (c) 2007 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
引用
收藏
页码：925 / 933
页数：9
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