Effect of strontium and melt purification on the solidification microstructure of hypereutectic Al-Si alloys

被引：15

作者：

Chen, Wenyao ^{[1
,2
]}

Liu, Ya ^{[1
,2
]}

Peng, Haoping ^{[1
,2
]}

Wang, Jianhua ^{[1
,2
]}

Su, Xuping ^{[1
,2
]}

机构：

[1] Changzhou Univ, Jiangsu Key Lab Mat Surface Sci & Technol, Changzhou 213164, Jiangsu, Peoples R China

[2] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolta Sci & En, Changzhou 213164, Jiangsu, Peoples R China

来源：

MATERIALS TODAY COMMUNICATIONS | 2023年 / 34卷

关键词：

Hypereutectic Al-Si alloy; Strontium element; Melt purification; Synergy; Solidification structure;

D O I：

10.1016/j.mtcomm.2022.105310

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The combined effect of Sr and melt purification on the solidification structure of hypereutectic Al-Si alloys was studied by optical microscopy, scanning electron microscopy, X-ray diffractometry, and differential scanning calorimetry. The results showed that different strontium contents have a certain inhibitory effect on the precipitation of primary silicon in Al-20Si alloy. A strontium content of 0.3 wt% completely inhibited the precipitation of primary silicon in Al-16Si alloy. The synergistic effect of melt purification and 0.3 wt% Sr eliminated primary silicon from the solidified structure of Al-Si alloy with a silicon content of less than 20 wt%. It also transformed the solidified structure of Al-20Si alloy into pseudo-eutectic. Therefore, the synergistic effect of an appropriate amount of Sr and melt purification suppressed the precipitation of primary silicon in hypereutectic Al-Si alloys.

引用

页数：9

共 19 条

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