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Modification of characteristics of diamond-like carbon thin films by low chromium content addition

Pardo, A., Gómez-Aleixandre, C., Orwa, J.O., Cimmino, A. and Prawer, S. 2012, Modification of characteristics of diamond-like carbon thin films by low chromium content addition, Diamond and related materials, vol. 26, pp. 39-44, doi: 10.1016/j.diamond.2012.03.007.

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Title Modification of characteristics of diamond-like carbon thin films by low chromium content addition
Author(s) Pardo, A.
Gómez-Aleixandre, C.
Orwa, J.O.ORCID iD for Orwa, J.O. orcid.org/0000-0001-6041-6751
Cimmino, A.
Prawer, S.
Journal name Diamond and related materials
Volume number 26
Start page 39
End page 44
Total pages 6
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2012-06
ISSN 0925-9635
Keyword(s) ECR-CVD
DLC
Cr incorporation
conductivity
coefficient of friction
Summary Diamond-like carbon thin films with low chromium content have been deposited by Electron Cyclotron Resonance Chemical Vapor Deposition (ECR-CVD) using a metallic target as chromium source. Major changes in the characteristics of the coatings have been shown as a result of the incorporation of Cr into the film. Raman spectroscopy reveals that the chromium incorporation leads to a reduction in the structural disorder, associated with a higher percentage of six-fold rings. An enhancement in film durability due to metal addition has been detected by pin-on-disk tests. Moreover, as measured by Atomic Force Microscopy (AFM), chromium doping of the diamond-like carbon film produces an increase in the electrical conductivity. The I-V characteristics, as obtained from Current Imaging Tunneling Spectroscopy (CITS) heating tests, in the 25-200 °C range suggest that metal contribute to the electrical conductivity by tunneling between the metal clusters and by enhancing the formation of conductive graphite-like structures, which also participate actively in the conduction process.
Language eng
DOI 10.1016/j.diamond.2012.03.007
Field of Research 091202 Composite and Hybrid Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2012, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091840

Document type: Journal Article
Collection: School of Engineering
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