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The purpose of this work was to expand the applications of molybdenum disulfide (MoS2) nanosheet additives by investigating their effectiveness and advantages for lubricating line contacts between bearing steel and medium carbon steel surfaces. The friction and wear effects of MoS2 nanosheet additives were investigated using block-on-ring tests, and compared with those from zinc dialkyldithiphosphates...
Optimizing the MoS2-based coating to overcome its humidity sensitivity is still a challenge. In this work, MoS2/Pb composite coatings with various Pb contents were synthesized by unbalanced magnetron sputtering system. The microstructures of the coatings change from loose columnar structure for pure MoS2 to a compact featureless structure for Pb doped MoS2. The hardness and elastic modulus of the...
In this paper, ionic liquid (IL) diamond-like carbon (DLC)-based solid–liquid lubricating coatings were used to conduct friction and wear experiments under a high-vacuum condition with alternating temperatures between −100 and 150°C. The results showed that the friction coefficients at 100 and −100°C were the lowest and the largest, respectively. Considering that the mobility, activity, spreadability,...
The tribological performances of non-hydrogenated amorphous carbon (a-C) coating sliding against different coating counterparts including a-C:H, CrN, CrSiN, TiN, TiCN and itself in ambient air and water were comparatively studied. Results showed that the a-C coating coupling with these different coatings exhibited similar low friction coefficients in ambient air, and the friction coefficients would...
Combination of solid and liquid lubricants to meet emission or environmental requirements of future tribological systems while providing the levels of desired friction and wear performance have received considerable research attention in the near term. The aim of the present work was to investigate the tribological behavior of oil-lubricated (PAO, PFPE, SO, IL and MAC) DLC coated surfaces under the...
The friction and wear behaviors of DLC-based solid–liquid lubricating coatings for three liquid lubricants sliding against different counterface materials were examined under high vacuum conditions. Seven kinds of balls with the diameter of 3mm were chosen as counterparts, which were GCr15, bronze, ZrO 2 , Al 2 O 3 , SiC, WC, and Si 3 N 4 . Under high vacuum...
In this paper, a kind of textured amorphous carbon film with the pattern of micro dots matrix was developed by irradiating amorphous carbon film with Nd–yttrium aluminum garnet laser system. Confirmed by the characterizations is that the produced micro dots are protuberant and in nanocrystalline graphite phase with a porous structure and reduced hardness. The micro tribological behavior of textured...
Solid lubricant films have received considerable research attention in the last decades owing to their remarkable improved tribological characteristics. In this paper, the abrasive wear behaviour of five types of solid lubricant films (magnetron-sputtered diamond-like carbon, magnetron-sputtered molybdenum disulfide, bonded molybdenum disulfide, bonded polytetrafluoroethylene and bonded graphite)...
In the present study, five kinds of liquid lubricants, including MACs, IL, Zdol, PAO and silicon oil, were homogeneously spun on DLC coatings and consequently the DLC-based solid–liquid lubricating dual-layer coatings were successfully fabricated. The tribological behaviors of the DLC/steel combinations and steel/steel combinations lubricated with above five liquid lubricants were comparatively investigated...
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