Microstructure formation in Al-Bi-Co immiscible alloys directionally solidified with different melt superheat temperatures

J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (2): 136-140.

• Research Articles • 上一篇下一篇

Microstructure formation in Al-Bi-Co immiscible alloys directionally solidified with different melt superheat temperatures

何杰 ¹;兴成尧²;李海全²;赵雷²;赵九洲 ³;Lorenz Ratke⁴

1. 金属研究所
2. Institute of Metal Research; Chinese Academy of Sciences
3. 中国科学院金属研究所
4. Institute of Materials Physics in Space; DLR

收稿日期:2009-04-16 修回日期:2009-07-22 出版日期:2010-02-28 发布日期:2010-02-28
通讯作者: 何杰
基金资助:
国家自然科学基金;博士启动基金;中国科学院知识创新工程青年人才领域前沿项目资助

Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures

Jie He, Chengyao Xing, Jiuzhou Zhao, Lei Zhao

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2009-04-16 Revised:2009-07-22 Online:2010-02-28 Published:2010-02-28
Contact: Jie He
Supported by:
the Knowledge Innovation Program of the Chinese Academy of Sciences, the National Natural Science Foundation of China (No. 50704032)
the Liaoning Province Natural Science Foundation of China (No. 20081009)

摘要/Abstract

摘要：

The directional solidification has been carried out for the Al-4Bi-2.5Co (wt.%) alloys with the different melt superheat temperatures. The microstructure characterization and the quantitative metallographic analysis have been performed. The results indicated that the Bi-rich sphere size and cellular spacing decrease with the increase of the melt superheat temperature. The interaction between the advancing solidification interface and the Bi-rich spheres with different sizes was analyzed. The effect of the melt superheat treatment on microstructure evolution has been discussed for the immiscible alloys. The microstructure development in ternary Al-Bi-Co alloys directionally solidified with different melt superheat temperatures was clarified.

关键词: Immiscible alloys, Directional solidification, Melt superheat, Solidification interface

Abstract:

The directional solidification has been carried out for the Al-4Bi-2.5Co (wt pct) alloys with different melt superheat temperatures. The microstructure characterization and the quantitative metallographic analysis have been performed. The results indicated that the Bi-rich sphere size and cellular spacing decrease with increasing melt superheat temperature. The interaction between the advancing solidification interface and the Bi-rich spheres with different sizes was analyzed. The effect of the melt superheat treatment on microstructure evolution was discussed for the immiscible alloys. The microstructure development in ternary Al-Bi-Co alloys directionally solidified with different melt superheat temperatures was clarified.

Key words: Immiscible alloys, Directional solidification, Melt superheat, Solidification interface

何杰兴成尧李海全赵雷赵九洲 Lorenz Ratke. Microstructure formation in Al-Bi-Co immiscible alloys directionally solidified with different melt superheat temperatures[J]. J. Mater. Sci. Technol., 2010, 26(2): 136-140.

Jie He, Chengyao Xing ,Jiuzhou Zhao, Lei Zhao. Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures[J]. J Mater Sci Technol, 2010, 26(2): 136-140.

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Microstructure formation in Al-Bi-Co immiscible alloys directionally solidified with different melt superheat temperatures

Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures

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