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Nonisothermal Kinetics Study of Phase Evolution of Zn-Fe Intermetallics

Published online by Cambridge University Press:  21 February 2011

O. N. C. Uwakweh ,
Z. T. Liu  and
M. Boisson
O. N. C. Uwakweh
Affiliation:
MS&E Department, University of Cincinnati, Cincinnati, OH 45221
Z. T. Liu
Affiliation:
MS&E Department, University of Cincinnati, Cincinnati, OH 45221
M. Boisson
Affiliation:
Fondation Ecole Polytech. Fern., 3 bis, rue Lakanal, 92330 Sceaux, France.
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Abstract

Through mechanical alloying of pure elemental powders of Fe and Zn, true homogeneous alloys of Γ (Fe3Zn10), Γ1 (Fe5Zn21), δ (FeZn7) and ζ (FeZn13) intermetallic phases are formed. Based on nonisothermal kinetics analyses, the highest activation energies associated with the metastable to stable transformations of these phases are determined as follows: 170±1 kJ/mol, 2 51±2 kJ/mol, 176±1 kJ/mol and 73 7±4 kJ/mol for the Γ, Γ1, δ and ζ-phases, respectively. These values reflect different diffusion/thermally induced processes associated with the transition of each of these phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 325
Copyright
Copyright © Materials Research Society 1998

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References

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