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Transient Nucleation in Co-Zr Metallic Glasses

Published online by Cambridge University Press:  26 February 2011

Uwe Köster  and
Margret Blank-Bewersdorff
Uwe Köster
Affiliation:
Department of Chemical Engineering, University of Dortmund D-4600 Dortmund 50, F. R. Germany
Margret Blank-Bewersdorff
Affiliation:
Department of Chemical Engineering, University of Dortmund D-4600 Dortmund 50, F. R. Germany
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Abstract

Crystallization kinetics and crystal size distributions in Co33Zr67-glasses have been analyzed by quantitative electron microscopy. The polymorphic crystallization of spherical CoZr2 crystals is very suitable reaction for such an analysis. Calculated crystal size distributions at different temperatures were compared to those experimentally revealed. Parameters controlling crystallization were varied within reasonable limits until theoretically calculated and experimentally observed crystal size distributions were in good agreement. It has been found that crystal size distribution can be explained by transient nucleation; the time lag and its temperature dependence can be evaluated. These results are discussed in the light of recent theories on transient nucleation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 57: Symposium I – Phase Transitions in Condensed Systems--Experiments and Theory , 1985 , 115
Copyright
Copyright © Materials Research Society 1987

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References

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