Počet záznamů: 1

Evaluation of hardness, tribological behaviour and impact load of carbon-based hard composite coatings exposed to the influence of humidity

  1. 1.
    0366083 - UPT-D 2012 RIV CH eng J - Článek v odborném periodiku
    Sobota, Jaroslav - Grossman, Jan - Buršíková, V. - Dupák, Libor - Vyskočil, J.
    Evaluation of hardness, tribological behaviour and impact load of carbon-based hard composite coatings exposed to the influence of humidity.
    Diamond and Related Materials. Roč. 20, č. 4 (2011), s. 596-599 ISSN 0925-9635
    Grant CEP: GA MPO 2A-1TP1/031; GA ČR GA202/07/1669
    Výzkumný záměr: CEZ:AV0Z20650511
    Klíčová slova: diamond-like carbon * mechanical properties * tribology
    Kód oboru RIV: JK - Koroze a povrchové úpravy materiálů
    Impakt faktor: 1.913, rok: 2011

    Diamond-like composite coatings were deposited by PACVD with an interface magnetron sputtered metallic layer prepared by d.c. unbalanced magnetron sputtering onto HSS substrates. The focus of the present work was on the study of the humidity effect on the tribological properties, hardness and impact resistance of the deposited coatings. The coatings were tested under both dry and humid conditions using several testing methods, like the pin-on-disc test equipped with linear reciprocating movement, impact test and depth sensing indentation test. It was found that the humidity may substantially influence not only the results of tribological tests, but surprisingly, also the results of the dynamic wear and hardness tests. By increasing the relative humidity, the value of dynamic impact resistance increased at an equivalent stress of 1.6 GPa more than three times. On the other hand, the wear rate of the coated part increased by more than four orders of magnitude.
    Trvalý link: http://hdl.handle.net/11104/0201174