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Liquid-Phase Separation of Undercooled Fe-Cu-Si Alloy

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Abstract:

Liquid phase separation occurred in undercooled Fe-Cu alloys when the undercooling of the melt exceeds a critical value. 5at.% of Si was added into Cu50Fe50 alloy to investigate its effect on the liquid phase separation of Fe-Cu alloys in this paper. It indicated that the addition of Si could enhance the liquid-phase separation in Cu50Fe50 alloy. Additionally, with the increase of undercooling, second liquid-separation occurred in Fe-rich liquids, and many globular, tadpole and peanut-like morphology emerged in the Fe-rich region of Fe45Cu50Si5 alloy. Because of the mixing enthalpy of Fe-Si atomic pairs is more negative than that of Cu-Si atomic pairs; so Si is inclined to rich in Fe-rich region.

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Periodical:

Advanced Materials Research (Volume 1095)

Pages:

160-163

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1095.160

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Online since:

March 2015

Authors:

Peng Hui Wu, Ning Liu*, Zhi Xuan Zhu

Keywords:

Fe-Cu –Si Alloys, Liquid-Phase Separation, Mixing Enthalpy, Undercooling

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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