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Improving the wear resistance of Al–Si alloy by ion implantation

Published online by Cambridge University Press:  31 January 2011

Y. Itoh ,
H. Azuma ,
A. Itoh  and
T. Hioki
Y. Itoh
Affiliation:
Toyota Central R&D Labs, Inc., 41–1, Aza Yokomichi, Oaza Nagakute, Nagakute-cho, Aichi-gun, Aichi-ken, 480–11, Japan
H. Azuma
Affiliation:
Toyota Central R&D Labs, Inc., 41–1, Aza Yokomichi, Oaza Nagakute, Nagakute-cho, Aichi-gun, Aichi-ken, 480–11, Japan
A. Itoh
Affiliation:
Toyota Central R&D Labs, Inc., 41–1, Aza Yokomichi, Oaza Nagakute, Nagakute-cho, Aichi-gun, Aichi-ken, 480–11, Japan
T. Hioki
Affiliation:
Toyota Central R&D Labs, Inc., 41–1, Aza Yokomichi, Oaza Nagakute, Nagakute-cho, Aichi-gun, Aichi-ken, 480–11, Japan
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Abstract

The mechanical properties of ion-implanted Al–Si alloy were studied using disk samples of alloy irradiated with Ar+, B+, and N2+ ions. Knoop hardness of ASTM 336.0 disks increased from 117 to 165 kgf/mm2 upon N2+ ion implantation. To measure tribological properties, lubricated ball-on-disk tests were performed using steel balls. The coefficients of friction of ion-implanted disks were higher than those of unimplanted ones. Ion implantation improved the wear resistance of the disks, and in the case of N2+ ion-implanted disks, the worn volume was smaller than 10−4 mm3. XPS analysis for the N2+ ion-implanted samples revealed the formation of aluminum and silicon nitride on the sample surface. On the other hand, the cross-sectional image of the ion-implanted surface showed precipitated Si which is held under the implanted N2+ ions.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 12 , December 1997 , pp. 3246 - 3249
Copyright
Copyright © Materials Research Society 1997

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References

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