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Could humicity affect the mechanical properties of carbon based coatings?

SYSNO ASEP	0351434
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Could humicity affect the mechanical properties of carbon based coatings?
Author(s)	Sobota, Jaroslav (UPT-D)_{RID, ORCID, SAI} Grossman, Jan (UPT-D)_RID Vyskočil, J. (CZ) Novák, R. (CZ) Fořt, Tomáš (UPT-D)_{RID, ORCID, SAI} Vítů, T. (CZ) Dupák, Libor (UPT-D)_{RID, ORCID, SAI}
Number of authors	7
Source Title	Chemické listy. - : Česká společnost chemická - ISSN 0009-2770 Roč. 104, č. 15 (2010), s. 375-377
Number of pages	3 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	carbon ; mechanical properties ; humidity ; fracture toughness of hard thin coatings
Subject RIV	JI - Composite Materials
CEZ	AV0Z20650511 - UPT-D (2005-2011)
UT WOS	000286413700029
Annotation	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.
Workplace	Institute of Scientific Instruments
Contact	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Year of Publishing	2011

Number of the records: 1