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Surface Nitridation of Amorphous Carbon by Nitrogen Ion Beam Irradiation

Published online by Cambridge University Press:  01 February 2011

Chihiro Iwasaki ,
Masami Aono ,
Nobuaki Kitazawa  and
Yoshihisa Watanabe
Chihiro Iwasaki
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, Kanagawa 239–8686, Japan
Masami Aono
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, Kanagawa 239–8686, Japan
Nobuaki Kitazawa
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, Kanagawa 239–8686, Japan
Yoshihisa Watanabe
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, Kanagawa 239–8686, Japan
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Abstract

Amorphous carbon was irradiated with a nitrogen ion beam and changes in composition and tribological properties after surface nitridation have been studied. The nitrogen ion beam energy was varied from 0.1 to 2.0 keV under the constant ion current density. Composition and chemical bonding states near the surface were analyzed by X-ray photoelectron spectroscopy (XPS). Tribological properties were studied by a pin-on-disk type tribotester. XPS studies show that the nitrogen concentration near the surface increases after nitrogen ion irradiation. The depth profiles of nitrogen in the irradiated specimens display that the nitrogen concentration near the surface is maximized after 0.2 to 0.7 keV ion irradiation. From the pin-on-disk testing, it is found that the friction coefficient of amorphous carbon increases after irradiation by 1.5 keV nitrogen ions, while the friction coefficient does not change drastically after irradiation by 0.2 keV ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 843: Symposium T – Surface Engineering-Fundamentals and Applications , 2004 , T3.1
Copyright
Copyright © Materials Research Society 2005

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References

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