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Alloy thermodynamics in nanostructures

Published online by Cambridge University Press:  03 March 2011

Jörg Weissmüller
Jörg Weissmüller
Affiliation:
Universität des Saarlandes and Institut für Neue Materialien, Gebäude 43, D-66041 Saarbrücken, Germany
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Abstract

The importance of the interactions between alloy atoms and topological defects for the thermodynamic properties of nanostructured alloys is pointed out. The McLean model for grain boundary segregation is extended to yield an expression for the total Gibbs free energy of an alloy polycrystal. This provides a simple conceptual basis for a qualitative discussion of the thermodynamic properties of nanocrystalline alloys. It is demonstrated that certain alloy poly- or nanocrystals may reach a metastable state, where the alloy is stable with respect to variation of its total grain boundary area.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 9 , Issue 1 , January 1994 , pp. 4 - 7
Copyright
Copyright © Materials Research Society 1994

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References

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