Phase composition and tribomechanical properties of Ti-B-C nanocomposite coatings prepared by magnetron sputtering

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dc.contributor.authorSánchez-López, J. C.
dc.contributor.authorAbad, M. D.
dc.contributor.authorJusto, A.
dc.contributor.authorGago, R.
dc.contributor.authorEndrino, J. L.
dc.contributor.authorGarcía-Luis, A.
dc.contributor.authorBrizuela, M.
dc.contributor.institutionTECNOLOGÍAS DE HIDRÓGENO
dc.contributor.institutionINGENIERÍA DE SUPERFICIES
dc.date.accessioned2024-07-24T12:15:07Z
dc.date.available2024-07-24T12:15:07Z
dc.date.issued2012-09-19
dc.description.abstractProtective nanocomposite coatings based on hard ceramic phases (TiC, TiB 2) combined with amorphous carbon (a-C) are of interest because of their adequate balance between mechanical and tribological performances. In this work, TiBC nanocomposite coatings were prepared by co-sputtering of graphite and TiB 2 targets. Varying the discharge power ratio applied to the graphite and TiB 2 targets from 0 to 2, the a-C content in the coatings could be tuned from 0 to 60%, as observed by means of Raman and x-ray photoelectron spectroscopy (XPS). The microstructural characterization demonstrated a progressive decrease in crystallinity from an initial nanocrystalline (nc) TiB 2-like structure to a distorted TiB xC y ternary compound with increasing C concentration. X-ray absorption near-edge structure measurements on the B K-edge helped to determine a hexagonal arrangement around the B atoms in the ternary TiB xC y phase. A fitting analysis of the C 1s XPS peak allowed us to evaluate the relative amount of a-C and TiB xC y components. A drastic change in hardness (from 52 to 13GPa) and friction coefficient values (from 0.8 to 0.2) is noticed when moving from nc-TiB 2 to TiBC/a-C nanocomposites. The fraction of a-C necessary to decrease the friction below 0.2 was found to be 45%. Raman observation of the wear tracks determined the presence of disordered sp 2-bonded carbon phase associated with the diminution of the friction level.en
dc.description.statusPeer reviewed
dc.identifier.citationSánchez-López , J C , Abad , M D , Justo , A , Gago , R , Endrino , J L , García-Luis , A & Brizuela , M 2012 , ' Phase composition and tribomechanical properties of Ti-B-C nanocomposite coatings prepared by magnetron sputtering ' , Journal Physics D: Applied Physics , vol. 45 , no. 37 , 375401 . https://doi.org/10.1088/0022-3727/45/37/375401
dc.identifier.doi10.1088/0022-3727/45/37/375401
dc.identifier.issn0022-3727
dc.identifier.urihttps://hdl.handle.net/11556/4543
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84865959265&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofJournal Physics D: Applied Physics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsElectronic, Optical and Magnetic Materials
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsAcoustics and Ultrasonics
dc.subject.keywordsSurfaces, Coatings and Films
dc.titlePhase composition and tribomechanical properties of Ti-B-C nanocomposite coatings prepared by magnetron sputteringen
dc.typejournal article
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