Effects of AlB2/AlP phase and electromagnetic stirring on impurity B/P removal in the solidification process of Al-30Si alloy

•Morphologically, B makes no difference to the nucleation process of primary Si.•The P existing as AlP phase has an effect on the nucleation process of primary Si.•Electromagnetic stirring can effectively enhance the segregation behavior of B and P. To enhance the understanding of impurities B and P...

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Bibliographic Details
Published in:Separation and purification technology 2018-12, Vol.207, p.151-157
Main Authors: Zou, Qingchuan, Han, Ning, Shen, Zhangfeng, Jie, Jinchuan, Li, Tingju
Format: Article
Language:English
Subjects:
Al-Si alloy
Electromagnetic stirring
Microstructure
Segregation behavior
Solidification
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Summary:•Morphologically, B makes no difference to the nucleation process of primary Si.•The P existing as AlP phase has an effect on the nucleation process of primary Si.•Electromagnetic stirring can effectively enhance the segregation behavior of B and P. To enhance the understanding of impurities B and P removal in the solidification purification process of the Al-30Si alloy, series of experiments were carried out to study the roles of AlB2 and AlP in the nucleation of primary Si and the effect of electromagnetic stirring on the segregation behaviors of B and P. The results showed that the formed AlB2 phase does not act as the nucleation site for the primary Si and tends to distribute in the eutectic Al-Si, which would not pollute the primary Si. The P content (
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2018.06.052