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A Comparison of the Mixing Rates for Fe-Ti and Ni-Ti Bilayers

Published online by Cambridge University Press:  25 February 2011

P. Børgesen ,
D. A. Lilienfeld ,
R. E. Wistrom  and
H. H. Johnson
P. Børgesen
Affiliation:
Dept.of Materials Science and Engineering, Cornell University Ithaca, NY 14853. USA
D. A. Lilienfeld
Affiliation:
National Nanofabrication Facility, Cornell University Ithaca, NY 14853. USA
R. E. Wistrom
Affiliation:
Dept.of Materials Science and Engineering, Cornell University Ithaca, NY 14853. USA
H. H. Johnson
Affiliation:
Dept.of Materials Science and Engineering, Cornell University Ithaca, NY 14853. USA
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Abstract

Previous comparisons of the room temperature mixing of Ni-Ti and Fe-Ti multilayers have shown significant differences in the mixing rates in spite of closely similar heats of mixing as well as ballistic properties. This result suggests contributions from mechanisms other than ballistic and thermal spike effects, or a break-down of present thermal spike models for these materials. In order to identify the mixing mechanisms involved, quantitative measurements were made at various temperatures between 80K and 350K using bilayer samples. Surprisingly, the mixing rates were found to disagree significantly with those estimated for multilayer samples.

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References

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