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Microstructure and Friction of Ion Beam Induced Amorphous Ti-Pd Alloys

Published online by Cambridge University Press:  22 February 2011

J-P. Hirvonen ,
M. Nastasi ,
J. R. Phillips  and
J. W. Mayer
J-P. Hirvonen
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
M. Nastasi
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
J. R. Phillips
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
J. W. Mayer
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
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Abstract

Multilayered samples of Ti-Pd with linearly varying compositions were irradiated by Xe ions at 600 keV. The induced microstructures were studied by using transmission electron microscopy and Rutherford backscattering. Mixing was found to be complete over the entire composition range, resulting in amorphous or amorphous plus crystalline structures except at the palladium-rich end, where a crystalline Pd-Ti solid solution was obtained. This is consistent with the high equilibrium solubility of Ti in Pd. In addition, significant coarsening of the microstructure caused by irradiation was found in this solid solution region.

Friction measurements were carried out in air and water by using a polytetrafluoroethylene pin as a counterpart. In air the friction coefficient was independent of composition and microstructure after about 2000 passes. In water, however, after 600 passes the friction coefficient reached a steady-state value with a pronounced minimum over the amorphous region. This property was unchanged throughout the remaining 10000 passes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 55: Symposium G – Biomedical Materials , 1985 , 395
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

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