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Effect of bias voltage on the tribological and sealing properties of rubber seals modified by DLC films
- Source :
- Surface and Coatings Technology, 360, 391-399. Elsevier Science
- Publication Year :
- 2019
-
Abstract
- Diamond-like carbon (DLC) films were deposited on nitrile butadiene rubber (NBR) by the DC magnetron sputtering under different bias voltages. Raman spectra revealed that the variation of bias voltage could tune the carbon bond structure in DLC films. Both the hardness and Young's modulus increased with the increasing bias voltage. Tribological tests revealed that the DLC-coated NBR prepared at the bias voltage of −200 V exhibited low wear rate due to its high hardness. The sealing property was studied by evaluating the leakage rate of volatile liquid in a simple apparatus. All DLC films resulted in less leakage rate as compared to the raw rubber under large stress. The lowest leakage rate occurred in the DLC-coated NBR prepared with a bias voltage of −200 V, which was associated with the theoretical calculations (Persson's theory). It was attributed to the synergetic effects of the variations of the Young's modulus and root-mean-square (Rms) roughness. The low Young's modulus and Rms, controlled by regulating bias voltage, could enhance actual contact area and reduce the leakage rate.
- Subjects :
- Materials science
Tribology
Diamond-like carbon
SURFACE
Modulus
02 engineering and technology
Diamond-like carbon film
NANOINDENTATION
0203 mechanical engineering
Natural rubber
Materials Chemistry
Composite material
DIAMOND-LIKE CARBON
INDENTATION
CONTACT MECHANICS
FRICTION
MODULUS
Biasing
Surfaces and Interfaces
General Chemistry
Nitrile butadiene rubber
Nanoindentation
Sputter deposition
PERFORMANCE
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
Surfaces, Coatings and Films
020303 mechanical engineering & transports
HYBRID DEPOSITION
visual_art
Sealing property
visual_art.visual_art_medium
MICROSTRUCTURE
0210 nano-technology
Contact area
Subjects
Details
- Language :
- English
- ISSN :
- 02578972
- Database :
- OpenAIRE
- Journal :
- Surface and Coatings Technology, 360, 391-399. Elsevier Science
- Accession number :
- edsair.doi.dedup.....522bd94b0fc27adfb8230c321537c220