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Metals 2016, 6(8), 177; doi:10.3390/met6080177

Effect of Rare-Earth Ce on Macrosegregation in Al-Bi Immiscible Alloys

1
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No. 3-11, Wenhua Road, Shenyang 110004, China
2
School of Materials Science and Engineering, Northeastern University, Shenyang 110004, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 8 July 2016 / Revised: 19 July 2016 / Accepted: 21 July 2016 / Published: 27 July 2016
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Abstract

Liquid phase segregation of immiscible alloys has been investigated for decades. In this work, rare-earth Ce was studied as an additive for Al-Bi immiscible alloys. The addition of Ce restrained liquid phase segregation to obtain a uniformly dispersive microstructure. The experimental results indicated that in situ-precipitated intermetallic CeBi2 compound acted as an inoculant for the heterogeneous nucleation of the Bi-rich droplets. The Bi-rich droplets nucleated on the CeBi2 compound surface—a homogenous dispersed microstructure obtained via a heterogeneous nucleation route. We concluded that gravity segregation can be suppressed by the addition of rare-earth Ce. View Full-Text
Keywords: immiscible alloys; rare-earth alloy; liquid–liquid segregation; heterogeneous nucleation immiscible alloys; rare-earth alloy; liquid–liquid segregation; heterogeneous nucleation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Man, T.; Zhang, L.; Xu, N.; Wang, W.; Xiang, Z.; Wang, E. Effect of Rare-Earth Ce on Macrosegregation in Al-Bi Immiscible Alloys. Metals 2016, 6, 177.

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