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Composition Dependence of Solid-State Amorphization Kinetics

Published online by Cambridge University Press:  26 February 2011

W. S. L. Boyer  and
M. Atzmon
W. S. L. Boyer
Affiliation:
The University of Michigan, Department of Nuclear Engineering, Ann Arbor, MI 48109
M. Atzmon
Affiliation:
The University of Michigan, Department of Nuclear Engineering, Ann Arbor, MI 48109
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Abstract

Solid-state amorphization rates have been measured for amorphous Ni1-cMc in contact with the crystalline terminal phase M, (M=Hf or Zr). The interdiffusion coefficient Dis found to depend on the composition of the amorphous phase, with higher Ni content resulting in a higher Dover the composition range Ni67Hf33 to Ni47Hf53. The common tangent composition at which the amorphous alloy is in metastable equilibrium with the terminal crystalline phase is found to be greater than 70 at.% Hf, which is considerably higher than previously reported values. This discrepancy is explained in terms of the interdiffusion coefficient's variation with composition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990 , 189
Copyright
Copyright © Materials Research Society 1992

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