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Solidified microstructure evolution of Mn-Sb near-eutectic alloy under high magnetic field conditions

Published online by Cambridge University Press:  31 January 2011

Qiang Wang ,
Ao Gao ,
Tie Liu ,
Feng Liu ,
Chao Zhang  and
Jicheng He
Qiang Wang*
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 100036, China
Tie Liu
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 100036, China
Feng Liu
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shanxi 710072, China
Jicheng He
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 100036, China
*
a) Address all correspondence to this author. e-mail: wangq@epm.neu.edu.cn
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Abstract

Mn-90.8 wt%Sb alloys were solidified without and with high magnetic fields to investigate the effects of high magnetic fields on the structure evolution of the alloys. It was found that there were only MnSb/Sb eutectics without any primary phase in the alloy at 0 T, whereas a small amount of primary MnSb dendrites appeared in the MnSb/Sb eutectic matrix when the magnetic flux density was 4.4 T. In magnetic fields of 6.6, 8.8, and 11.5 T, both of two primary phases, i.e., MnSb and Sb, occurred in the matrix. In addition, the volume fraction of these two primary phases increased with increasing magnetic flux density. In magnetic fields of 8.8 and 11.5 T, primary MnSb dendrites aligned parallel to the magnetic field direction and gathered at the edge of the specimens. In contrast, primary Sb dendrites gathered in the center region of the specimens.

Keywords

AlloyMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 7 , July 2009 , pp. 2331 - 2337
Copyright
Copyright © Materials Research Society 2009

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