Microstructural features of AlFeSi spherical particles in hypoeutectic Al-Si alloy

被引：1

作者：

Lei, Xuanxuan ^{[1
]}

Li, Yukun ^{[2
]}

Du, Xiaodong ^{[1
,3
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Sch Instrument Sci & Optoelect Engn, Hefei 230009, Peoples R China

[3] Hefei Univ Technol, Engn Res Ctr High Performance Copper Alloy Mat & P, Minist Educ, Hefei 230009, Peoples R China

来源：

MATERIALS TODAY COMMUNICATIONS | 2023年 / 37卷

关键词：

Al -Si master alloy; Spherical particles; Al; 9; Fe; 2; Si; Fine Si particles; Nucleation; FE-RICH PHASES; INTERMETALLIC PHASES; IN-SITU; NUCLEATION; GROWTH; ALUMINUM; SELECTION; IRON;

D O I：

10.1016/j.mtcomm.2023.107105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Al-Si alloy ingots used for the study were produced by diluting an Al-Si master alloy containing impurity Fe with pure Al. A type of micron-sized AlFeSi spherical microstructure was observed in the diluted alloy ingot. These spherical particles have an overall diameter range of 2.8-6.1 mu m, with polyhedral Al9Fe2Si2 particles inside and clusters of fine Si particles with sizes concentrated at 200-250 nm outside. During solidification, the AlFeSi atomic clusters in the alloy melt firstly form the polyhedral Al9Fe2Si2 and then a shell of fine Si particles. The internal polyhedral Al9Fe2Si2 particles and the external fine Si particles have different formation mechanisms, with the polyhedral Al9Fe2Si2 particles being dominated by faceted growth and the fine Si particles being dominated by finite growth after nucleation.

引用

页数：11

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