期刊
LUBRICATION SCIENCE
卷 26, 期 6, 页码 428-439出版社
WILEY
DOI: 10.1002/ls.1259
关键词
physical vapour deposition (PVD); tribology; amorphous carbon; coatings; lubrication
资金
- FEDER through programme COMPETE - Programa Operacional Factores de Competitividade
- FCT-Fundacao para a Ciencia e a Tecnologia [PTDC/EME-TME/66471/2006, SFRH/BPD/41357/2007]
- FP7 - INTERFACE 2020
- Czech Science Foundation [P108-10-1782]
- Engineering and Physical Sciences Research Council [EP/K005103/1] Funding Source: researchfish
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/41357/2007, PTDC/EME-TME/66471/2006] Funding Source: FCT
- EPSRC [EP/K005103/1] Funding Source: UKRI
Carbon-based coatings with different W contents were deposited by direct current magnetron sputtering in reactive and non-reactive atmospheres. All deposited coatings have compact morphologies with amorphous (tungsten-free) or nanocrystalline structures (tungsten-doped). The latter one was indicated by very broad peaks in X-ray Diffraction spectra in the position of tungsten carbide suggesting W-carbide nanoparticles embedded in an amorphous carbon matrix. The hardness increased from 10 to 15 GPa with increasing W content. The coatings were tribological tested at dry and lubricated conditions with increasing temperature in a coating/steel configuration. In dry sliding, the friction coefficient increases with the increase of the temperature reaching values higher than 1.0. The friction is significantly lower in lubricated contact using three different oils: poly-alpha-olefin, paraffin and olive oil. The olive oil shows promising lubricating properties at the temperature lower than 70 degrees C; however, at higher temperature, the coatings were quickly worn through. Copyright (c) 2014 John Wiley & Sons, Ltd.
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