Elsevier

Scripta Materialia

Volume 205, December 2021, 114218
Scripta Materialia

Effect of Zr addition on metastable Liquid-Liquid Phase Separation of Cu-Fe alloys

https://doi.org/10.1016/j.scriptamat.2021.114218Get rights and content

Abstract

The liquid-liquid phase separation (LLPS) behavior was investigated in Cu-Fe alloys that consisted of 60 wt % or 80 wt % Cu and balance iron, without or with addition of 1 wt% Zr. Both Zr-free alloys clearly showed LLPS at metastable spinodal temperatures prior to γ-Fe nucleation, whereas Zr-added showed γ-Fe phase evolution without LLPS. Addition of Zr was highly effective to activate γ-Fe nucleation by decreasing the mixing enthalpy and also accelerating heterogeneous nucleation. A combination of thermal instrumental analysis and classical nucleation theory yielded an effective assessment made of LLPS behavior below the liquidus temperature of Cu-Fe alloys. Furthermore, it was possible to control the solidification mechanism of Cu-Fe alloy by zirconium addition.

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Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgement

This work was supported by the Technology Innovation Program (20011576) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea)

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