Počet záznamů: 1

Could humicity affect the mechanical properties of carbon based coatings?

  1. 1.
    0351434 - UPT-D 2011 RIV CZ eng J - Článek v odborném periodiku
    Sobota, Jaroslav - Grossman, Jan - Vyskočil, J. - Novák, R. - Fořt, Tomáš - Vítů, T. - Dupák, Libor
    Could humicity affect the mechanical properties of carbon based coatings?.
    Chemické listy. Roč. 104, č. 15 (2010), s. 375-377 ISSN 0009-2770
    Výzkumný záměr: CEZ:AV0Z20650511
    Klíčová slova: carbon * mechanical properties * humidity * fracture toughness of hard thin coatings
    Kód oboru RIV: JI - Kompozitní materiály
    Impakt faktor: 0.620, rok: 2010

    We evaluated the influence of humidity on tribological behaviour, impact resistance and tribological behaviour at elevated temperatures of carbon-based hard composite coatings deposited by PACVD with an interface metallic layer prepared by unbalanced magnetron sputtering. Impact tests were carried out at a relative humidity of 2.5% and 95% at an impact force of 600 N. Comparing measured values of crater volumes we can see, that the relative humidity substantially influences dynamic resistance of the coating - substrate system, in particular in the region of mechanical erosion of the coating. It is well known for years, that humidity can significantly influence the tribological behaviour of carbon-based coatings. However, humidity also influences the impact resistance of this type of films. By increasing the relative humidity, the value of dynamic impact resistance significantly increases. Simultaneously the wear rate of the coated part increases by many orders of magnitude.
    Trvalý link: http://hdl.handle.net/11104/0191191