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Surface Crystallization of Metal-Metalloid-Glasses

Published online by Cambridge University Press:  26 February 2011

Uwe Küster  and
Barbara Punge-Witteler
Uwe Küster
Affiliation:
Department of Chemical Engineering University Dortmund, D-4600 Dortmund 50, F.R.Germany
Barbara Punge-Witteler
Affiliation:
Department of Chemical Engineering University Dortmund, D-4600 Dortmund 50, F.R.Germany
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Abstract

Preferential crystal nucleation and growth may occur at surfaces because of a decrease in surface energy, a greater ease of diffusion and stress relaxation or a change in surface composition. Segregation as well as selective oxidation are assumed to possess the strongest influence on surface crystallization.

Crystal nucleation and growth at both surfaces of melt-spun ribbons has been studied systematically in a number of Ni-B and Co-B glasses by means of quantitative light and electron microscopy. Crystal diameter distributions indicate a transient type heterogeneous nucleatior mode for surface crystallization. The results will be compared wi th crystallization in the bulk.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 80: Symposium G – Science and Technology of Rapidly Quenched Alloys , 1986 , 355
Copyright
Copyright © Materials Research Society 1987

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References

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