Distribution Behavior of B and P during Al-Si Melt Directional Solidification with Open-Ended Crucible

Bai Xiaolong; Ban Boyuan; Li Jingwei; Peng Zhijian; Chen Jian

doi:10.1515/htmp-2016-0127

High Temperature Materials and Processes (Mar 2018)

Distribution Behavior of B and P during Al-Si Melt Directional Solidification with Open-Ended Crucible

Bai Xiaolong,
Ban Boyuan,
Li Jingwei,
Peng Zhijian,
Chen Jian

Affiliations

Bai Xiaolong: School of Engineering and Technology, China University of Geosciences, Beijing100083, China
Ban Boyuan: Key Laboratory of Novel Thin Film Solar Cells, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei230031, China
Li Jingwei: Key Laboratory of Novel Thin Film Solar Cells, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei230031, China
Peng Zhijian: Key Laboratory of Novel Thin Film Solar Cells, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei230031, China
Chen Jian: Key Laboratory of Novel Thin Film Solar Cells, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei230031, China

DOI: https://doi.org/10.1515/htmp-2016-0127
Journal volume & issue: Vol. 37, no. 3
pp. 201 – 208

Abstract

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Distribution behavior of B and P during directional solidification of Al-20Si, Al-30Si and Al-40Si alloys has been investigated. Macrostructure of the Al-Si alloy ingots and concentration profile of elements B and P reveal that the elements segregate to eutectic Al-Si melt during growth of primary Si flakes, and P gradually segregates to the top of the ingots during directional solidification. An apparent segregation coefficient, ka, is introduced to describe the segregation behavior of B and P between the primary Si and the Al-Si melt and compared with thermodynamic theoretical equilibrium coefficients. The apparent segregation coefficients of B and P decrease with increase of solidification temperature.

Published in High Temperature Materials and Processes

ISSN: 0334-6455 (Print); 2191-0324 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Technology: Chemical technology: Chemicals: Manufacture, use, etc.
Website: https://www.degruyter.com/view/journals/htmp/htmp-overview.xml

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