A comparative study of the structural, mechanical and tribological characteristics of TiSiC-Cr coatings prepared in CH4 and C2H2 reactive atmosphere by cathodic vacuum arc

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dc.contributor.author Braic, Mariana
dc.contributor.author Vladescu, Alina
dc.contributor.author Balaceanu, Mihai
dc.contributor.author Luculescu, Catalin
dc.contributor.author Padmanabhan, Sibu C.
dc.contributor.author Constantin, Lidia
dc.contributor.author Morris, Michael A.
dc.contributor.author Braic, V.
dc.contributor.author Grigorescu, Cristiana E. A.
dc.contributor.author Ionescu, Paul
dc.contributor.author Dracea, Maria Diana
dc.contributor.author Logofatu, Constantin
dc.date.accessioned 2017-01-10T16:49:05Z
dc.date.available 2017-01-10T16:49:05Z
dc.date.issued 2017-12-21
dc.identifier.citation Braic, M., Vladescu, A., Balaceanu, M., Luculescu, C., Padmanabhan, S. C., Constantin, L., Morris, M. A., Braic, V., Ana Grigorescu, C. E., Ionescu, P., Dracea, M. D. and Logofatu, C. (2017) 'A comparative study of the structural, mechanical and tribological characteristics of TiSiC-Cr coatings prepared in CH4 and C2H2 reactive atmosphere by cathodic vacuum arc', Applied Surface Science, 400, pp. 318-328. doi:10.1016/j.apsusc.2016.12.160 en
dc.identifier.volume 400 en
dc.identifier.startpage 318 en
dc.identifier.endpage 328 en
dc.identifier.issn 0169-4332
dc.identifier.uri http://hdl.handle.net/10468/3460
dc.identifier.doi 10.1016/j.apsusc.2016.12.160
dc.description.abstract TiSiC-Cr coatings, with Cr and Si as additional elements, were deposited on Si, C 45 and 316 L steel substrates via cathodic arc evaporation. Two series of coatings with thicknesses in the range of 3.6–3.9 μm were produced, using either CH4 or C2H2 as carbon containing gas. For each series, different coatings were prepared by varying the carbon rich gas flow rate between 90 and 130 sccm, while maintaining constant cathode currents (110 and 100 A at TiSi and Cr cathodes, respectively), substrate bias (–200 V) and substrate temperature (∼320 °C). The coatings were analyzed for their mechanical characteristics (hardness, adhesion) and tribological performance (friction, wear), along with their elemental and phase composition, chemical bonds, crystalline structure and cross-sectional morphology. The coatings were found to be formed with nano-scale composite structures consisting of carbide crystallites (grain size of 3.1–8.2 nm) and amorphous hydrogenated carbon. The experimental results showed significant differences between the two coating series, where the films formed from C2H2 exhibited markedly superior characteristics in terms of microstructure, morphology, hardness, friction behaviour and wear resistance. For the coatings prepared using CH4, the measured values of crystallite size, hardness, friction coefficient and wear rate were in the ranges of 7.2–8.2 nm, 26–30 GPa, 0.3–0.4 and 2.1–4.8 × 10−6 mm3 N−1 m−1, respectively, while for the coatings grown in C2H2, the values of these characteristics were found to be in the ranges of 3.1–3.7 nm, 41–45 GPa, 0.1–0.2 and 1.4–3.0 × 10−6 mm3 N−1 m−1, respectively. Among the investigated coatings, the one produced using C2H2 at the highest flow rate (130 sccm) exhibited the highest hardness (45.1 GPa), the lowest friction coefficient (0.10) and the best wear resistance (wear rate of 1.4 × 10−6 mm3 N−1 m−1). en
dc.description.sponsorship Autoritatea Natională pentru Cercetare Stiintifică, Romanian National Authority for Scientific Research (Grant CNCS – UEFISCDI; projects no. PN-II-PT-PCCA-2011-3.2-1453 and no. PN-II-ID-PCE-2011-3-1016); Enterprise Ireland (CF/2014/4370); Science Foundation Ireland (AMBER Research Centre (12/RC/2278)) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.rights © 2016 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject TiSiC-Cr coatings en
dc.subject Cathodic arc en
dc.subject Structure en
dc.subject Mechanical properties en
dc.subject Friction and wear en
dc.title A comparative study of the structural, mechanical and tribological characteristics of TiSiC-Cr coatings prepared in CH4 and C2H2 reactive atmosphere by cathodic vacuum arc en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Sibu C Padmanabhan, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: sc.padmanabhan@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this item is restricted until 24 months after publication by the request of the publisher. en
dc.check.date 2018-12-21
dc.date.updated 2017-01-10T16:36:41Z
dc.description.version Accepted Version en
dc.internal.rssid 379091592
dc.contributor.funder Enterprise Ireland en
dc.contributor.funder Autoritatea Natională pentru Cercetare Stiintifică en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Applied Surface Science en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress sc.padmanabhan@ucc.ie en


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© 2016 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ Except where otherwise noted, this item's license is described as © 2016 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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