Cluster formation at the Si/liquid interface in Sr and Na modified Al-Si alloys

被引：89

作者：

Barrirero, Jenifer ^{[1
,2
]}

Li, Jiehua ^{[3
]}

Engstler, Michael ^{[1
]}

Ghafoor, Naureen ^{[2
]}

Schumacher, Peter ^{[3
]}

Oden, Magnus ^{[2
]}

Muecklich, Frank ^{[1
]}

机构：

[1] Univ Saarland, Dept Mat Sci, Campus D3-3, D-66123 Saarbrucken, Germany

[2] Linkoping Univ, Dept Phys Chem & Biol IFM, Nanostruct Mat, SE-58183 Linkoping, Sweden

[3] Univ Leoben, A-8700 Leoben, Austria

来源：

SCRIPTA MATERIALIA | 2016年 / 117卷

关键词：

Eutectic solidification; Atom probe tomography; Aluminium alloys; Eutectic modification; Transmission electron microscopy; ALUMINUM-SILICON ALLOYS; ATOM-PROBE TOMOGRAPHY; EUTECTIC SI; GROWTH; MICROSTRUCTURE; SEGREGATION; STRONTIUM; PHASE; 3DAP; EU;

D O I：

10.1016/j.scriptamat.2016.02.018

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Atom probe tomography was used to compare Na and Sr modified Al-Si hypoeutectic alloys. Both Na and Sr promote the formation of nanometre-sized clusters in the Si eutectic phase. Compositional analyses of the clusters show an Al:Sr ratio of 2.92 +/- 0.46 and an Al:Na ratio of 1.07 +/- 0.23. It is proposed that SrAl2Si2 and NaAlSi clusters are formed at the Si/liquid interface and take part in the modification process by altering the eutectic Si growth. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：16 / 19

页数：4

共 33 条

[1] Comparison of segregations formed in unmodified and Sr-modified Al-Si alloys studied by atom probe tomography and transmission electron microscopy [J].