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Tracer diffusion of 60Co and 63Ni in amorphous NiZr alloy

Published online by Cambridge University Press:  31 January 2011

K. Hoshino ,
R. S. Averback ,
H. Hahn  and
S. J. Rothman
K. Hoshino
Affiliation:
Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana–Champaign, Illinois 61801
R. S. Averback
Affiliation:
Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana–Champaign, Illinois 61801
H. Hahn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
S. J. Rothman
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
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Abstract

Tracer diffusion of 60Co and 63Ni in the amorphous alloy NiZr near the equiatomic composition has been measured in the temperature range between 486 and 641 K using the ion-beam sputter-sectioning technique for serial sectioning. The temperature dependence for the diffusivities of Co and Ni in a-NiZr exhibit Arrhenius behavior; these can be expressed as follows: D∗co = 3.6 × 10−7 exp [− (135 ± 14) kJ mol−1 /RT] m2/s and D∗Ni = 1.7 × 10−7 exp [− (140 ± 9) kJ mol−1 /RT] m2/s. The values of D∗Ni are in good agreement with those measured by the Rutherford backscattering technique. The measured diffusivities were independent of time, indicating that no relaxation took place during diffusion.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 1 , February 1988 , pp. 55 - 58
Copyright
Copyright © Materials Research Society 1988

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References

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