Effect of concurrent electron irradiation on the structure of deposited carbon films

Effect of concurrent electron irradiation on the structure of deposited carbon films Carbon films 110–180 nm thick are fabricated on nickel substrates by the ion sputtering of graphite with simultaneous electron irradiation and subsequent ion irradiation. Irradiation leads to the formation of bonds in the films in various proportions due to the sp and sp 3 hybridization of orbitals (sp-and sp 3-bonds). Ion irradiation induces, to a greater extent, the formation of sp bonds, while concurrent electron irradiation increases the portion of sp 3 bonds. Electron and ion irradiation increases the film microhardness which reaches a value of 12 GPa. A model of the kinetics of creating carbon allotropes in a deposited film is proposed, which is based on the competition between the formation and breakage of carbon bonds during hybridization of different types. Electron and ion irradiation influence the probabilities of the formation and breakage of carbon bonds in the deposited film. The model provides a qualitative interpretation of the observed content ratios of carbon phases in the deposited film. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques Springer Journals

Effect of concurrent electron irradiation on the structure of deposited carbon films

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Publisher
Pleiades Publishing
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Materials Science; Surfaces and Interfaces, Thin Films
ISSN
1027-4510
eISSN
1819-7094
D.O.I.
10.1134/S1027451017040206
Publisher site
See Article on Publisher Site

Abstract

Carbon films 110–180 nm thick are fabricated on nickel substrates by the ion sputtering of graphite with simultaneous electron irradiation and subsequent ion irradiation. Irradiation leads to the formation of bonds in the films in various proportions due to the sp and sp 3 hybridization of orbitals (sp-and sp 3-bonds). Ion irradiation induces, to a greater extent, the formation of sp bonds, while concurrent electron irradiation increases the portion of sp 3 bonds. Electron and ion irradiation increases the film microhardness which reaches a value of 12 GPa. A model of the kinetics of creating carbon allotropes in a deposited film is proposed, which is based on the competition between the formation and breakage of carbon bonds during hybridization of different types. Electron and ion irradiation influence the probabilities of the formation and breakage of carbon bonds in the deposited film. The model provides a qualitative interpretation of the observed content ratios of carbon phases in the deposited film.

Journal

Journal of Surface Investigation. X-ray, Synchrotron and Neutron TechniquesSpringer Journals

Published: Aug 24, 2017

References

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