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Zero Creep Measurements of the Interfacial Free Energy of Ag/Ni Multilayers

  • D. Josell (a1) and F. Spaepen (a1)

Abstract

The free energy γAgNi associated with an interface between layers of silver and nickel has been experimentally determined. Creep tests were conducted on multilayer thin films to determine the load at which the length of the film neither shrank nor stretched. The interfacial free energy was obtained from this zero creep load and microstructural data using a specific model for the grain boundary diffusional creep in multilayers.

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References

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1 Smith, C.S., Tran. AIME, 175, 1550 (1948)‥
2 Josell, D. and Spaepen, F. “Extraction of Interfacial and Surface Tensions From Zero Creep Experiments on Thin Films and Multilayers”. In preparation.
3 Udin, H., Trans. AIME J. Met., 189, 63 (1951).
4 Fisher, J.C. and Dunn, C.G., In Imperfections in Nearly Perfect Crystals. (John Wiley & Sons. 1952), pp. 317351.
5 Hondros, E.D., Proc. Roy. Soc. A 286, 479498 (1965).
6 Frost, H.J. and Ashby, M.F. Deformation-Mechanism Maps: The Plasticity and Creep of Metals and Ceramics. (Pergamon Press, New York, 1982)
7 Arzt, E., Ashby, M.F., and Verrall, R.A., Acta Metall., 31, 19771989 (1983).
8 A general discussion of this point is found in reference 2.

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