Influence of diamond and graphite bonds on mechanical properties of DLC thin films

0449703 - FZÚ 2016 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Písařík, Petr - Jelínek, Miroslav - Kocourek, Tomáš - Remsa, Jan - Zemek, Josef - Lukeš, J. - Šepitka, J.
Influence of diamond and graphite bonds on mechanical properties of DLC thin films.
Journal of Physics Conference Series, Vol. 594. Bristol: IOP PUBLISHING LTD, 2015, 012008. ISSN 1742-6588.
[International laser physics workshop /23./ (LPHYS'14). Sofia (BG), 14.07.2014-18.07.2014]
Grant CEP: GA ČR(CZ) GA13-33056S
Institucionální podpora: RVO:68378271
Klíčová slova: thin films * pulsed laser deposition * mechanical properties * diamond and graphite bonds
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Mechanical properties of diamond-like carbon thin films with various ratios of sp3/sp2 bonds were studied. The films were prepared in argon atmosphere (0.25 Pa) by laser deposition method for laser energy densities from 4 J.cm-2 to 14 J.cm-2. The sp2 and sp3 bonds were calculated by X-ray photoelectron spectroscopy. Films contained sp3 bonds up to 70 %. Surface properties as roughness and atomic force microscopy topology were measured. Hardness (and reduced Young's modulus) were determined by nanoindentation and reached of 30 GPa (203 GPa). Films adhesion was studied using scratch test and was up to 12 N for biomedical alloy (titanium substrates - Ti-6Al-4V). Relations among deposition conditions and measured properties are presented.
Trvalý link: http://hdl.handle.net/11104/0251199