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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.

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Type
Articles
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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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