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Structure, mechanical, and tribological properties of titanium implanted alumina

Published online by Cambridge University Press:  29 June 2016

S. M. M. Ramos ,
B. Canut ,
L. Gea ,
P. Thevenard ,
M. Bauer ,
Y. Maheo ,
Ph. Kapsa  and
J. L. Loubet
S. M. M. Ramos
Affiliation:
Université Claude Bernard Lyon I, Département Physique des Matériaux, URA CNRS 172, Campus de la Doua, 43 boulevard du 11 Novembre 1918, 69622 Vdleurbanne Cedex, France
B. Canut
Affiliation:
Université Claude Bernard Lyon I, Département Physique des Matériaux, URA CNRS 172, Campus de la Doua, 43 boulevard du 11 Novembre 1918, 69622 Vdleurbanne Cedex, France
L. Gea
Affiliation:
Université Claude Bernard Lyon I, Département Physique des Matériaux, URA CNRS 172, Campus de la Doua, 43 boulevard du 11 Novembre 1918, 69622 Vdleurbanne Cedex, France
P. Thevenard
Affiliation:
Université Claude Bernard Lyon I, Département Physique des Matériaux, URA CNRS 172, Campus de la Doua, 43 boulevard du 11 Novembre 1918, 69622 Vdleurbanne Cedex, France
M. Bauer
Affiliation:
Ecole Centrale de Lyon, Laboratoire de Technologie des Surfaces, URA CNRS 855, 36 avenue Guy de Collongue, B.P. 163, 69131 Ecully Cedex, France
Y. Maheo
Affiliation:
Ecole Centrale de Lyon, Laboratoire de Technologie des Surfaces, URA CNRS 855, 36 avenue Guy de Collongue, B.P. 163, 69131 Ecully Cedex, France
Ph. Kapsa
Affiliation:
Ecole Centrale de Lyon, Laboratoire de Technologie des Surfaces, URA CNRS 855, 36 avenue Guy de Collongue, B.P. 163, 69131 Ecully Cedex, France
J. L. Loubet
Affiliation:
Ecole Centrale de Lyon, Laboratoire de Technologie des Surfaces, URA CNRS 855, 36 avenue Guy de Collongue, B.P. 163, 69131 Ecully Cedex, France
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Abstract

A study of the effects of titanium ion implantation on the structural, mechanical, and tribological properties of single crystal and polycrystalline α-alumina has been carried out. Rutherford Backscattering Spectrometry (RBS) in channeling geometry shows that a great proportion of implanted titanium ions are substitutional at low fluence. This fraction falls to near zero as an amorphous layer is formed. The chemical states for implanted titanium are determined by X-ray Photoelectron Spectroscopy (XPS). Titanium is present in the Ti3+ state near the surface and as metallic Ti0 and as Ti3+ at depths corresponding to higher local concentration of titanium. The same behavior is observed for polycrystalline and single crystal α–alumina. Nanoindentation experiments show that low fluence implantation of titanium results in an increase of mechanical properties whereas high fluence implanted samples exhibit reduced hardness and Young's modulus compared to unimplanted samples. The friction coefficient is not changed by titanium ion implantation. Likewise, the wear characteristics were not changed by low fluence implantation, but amorphization at high fluence leads to a greater disk wear rate.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 1 , January 1992 , pp. 178 - 184
Copyright
Copyright © Materials Research Society 1992

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References

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