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The Effect of Solute on the homogeneous Crystal Nucleation Frequency in Metallic Melts

Published online by Cambridge University Press:  15 February 2011

C.V. Thompson  and
F. Spaepen
C.V. Thompson
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 2138, USA
F. Spaepen
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 2138, USA
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Abstract

We have made a complete calculation that extends the classical theory for crystal nucleation in pure melts to binary alloys. Using a regular solution model, we have developed approximate expressions for the free energy change upon crystallization as a function of solute concentration. They are used, together with model-based estimates of the interfacial tension, to calculate the nucleation frequency. The predictions of the theory for the maximum attainable undercooling are compared with existing experimental results for non-glass forming alloys. The theory is also applied to several easy glass-forming alloys (Pd-Si, Au-Si, Fe-B) for qualitative comparison with the present experimental experience on the ease of glass formation, and for assessment of the potential for formation of the glass in bulk.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 9 , 1981 , 603
Copyright
Copyright © Materials Research Society 1982

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References

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