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Metastable liquid phase separation in undercooled molten Pd40.5Ni40.5P19

Published online by Cambridge University Press:  31 January 2011

C. W. Yuen ,
K. L. Lee  and
H. W. Kui
C. W. Yuen
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
K. L. Lee
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
H. W. Kui
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
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Abstract

It was demonstrated that molten Pd40.5Ni40.5P19 undergoes liquid state phase separation in the undercooling regime δT = T1 − T where T1 is the liquidus of Pd40.5Ni40.5P19 and T is the kinetic crystallization temperature. Liquid state phase separation by nucleation and growth takes place for δT ≤ 60 K while that by spinodal decomposition occurs for δT ≥ 100 K. Microstructural analysis of the undercooled specimen obtained in the undercooling regime of 60 ≤ δT ≤ 100 K indicates that it is the transition regime. Finally, it was found that when undercooled molten Pd40.5Ni40.5P19 undergoes liquid state spinodal decomposition, it first decomposes into two liquid networks, which is finally replaced by a system of three liquid networks.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 2 , February 1997 , pp. 314 - 317
Copyright
Copyright © Materials Research Society 1997

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References

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