Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts

材料科学技术（英文）, 2012, 28(7): 622-625.

Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts

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1.School of Metallurgy and Materials Engineering, Jiangsu University of Science and Technology, Zhangjiagang 215600, China／State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

2.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

3.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China／School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008, China

4.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

5.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

6.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

基金项目: The work was financially supported by the Natural Science Foundation of China(Grant 50771084) the Natural Science Foundation of the Educa- tion Department of Jiangsu province, China(Grant 09KJB430004)

关键词：液相分离 , 铜熔体 , 快速凝固 , Co-Cu合金 , 冷铁 , 液体分离 , 凝固温度 , 差示热分析

Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts

Keywords： Undercooled Fe-Co-Cu alloys , Egg-type structure , Liquid-phase separation ,

The homogeneous liquid was separated into two phases, （Fe, Co）-rich LI and Cu-rich L2, once the melt was undercooled below a liquid-phase separation temperature Tsep. If the duration from Tsep to Tsl （solidification temperature of LI phase）, termed the liquid-phase separation interval Δt, exceeded a critical value, an eggtype structure was observed. By utilizing differential thermal analyses （DTA）, the solidification process of the undercooled Fe-Co-Cu alloys was studied. Additionally, an immiscible boundary was obtained, which was a convex parabola with a symmetrical axis of XCu=0.52. Depending on the relative amounts of LI and L2, the minor phase was nucleated firstly to form liquid droplets and separated from the original liquids at the beginning of liquid-phase separation.

参考文献

[1]	A. MUNITZ;R. ABBASCHIAN .Microstructure of Cu-Co Alloys Solidified at Various Supercoolings[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(12):4049-4059.
[2]	W. Banda;G.A. Georgalli;C. Lang .Liquidus temperature determination of the Fe-Co-Cu system in the Fe-rich corner by thermal analysis[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):178-182.

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材料期刊网

Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts

Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts

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