Tribological Behaviour of Copper-Graphene Composite Materials

Chmielewski, Marcin; Michalczewski, R.; Piekoszewski, W.; Kalbarczyk, M.

doi:10.4028/www.scientific.net/kem.674.219

Cited by 19 publications

(8 citation statements)

References 15 publications

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“…Increasing the percentage of solid lubricant, a slight strengthening effect was measured, as previously reported in the literature [43,72,73]. As stated in the introduction, a strengthening effect can be found due to the presence of graphene in the copper matrix [37][38][39]. The indentation hardness values obtained in this study were largely below those measured for the MoS 2 composites, probably due to an excess of solid lubricant.…”

Section: Micro-indentation Hardnesssupporting

confidence: 85%

“…In recent decades, copper and carbonaceous phases have attracted scientific research, thanks to their combination of electrical conductivity, mechanical and tribological properties. The different allotropes of carbon that have been employed in addition to the copper matrix include graphite [34,35], fibers [36], graphene [37][38][39], and carbon nanotubes [40].…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the grain boundary presents the preferential path for cracks formation, and an excess of graphene overly weakens this crucial region. The increased percentage of graphene leads to a lower friction coefficient in wear tests thanks to the abundance of lubricant, matched by deeper wear tracks [39]. The ploughing abrasive wear, delamination and adhesion observed in pure copper samples are mitigated in the composite materials.…”

Section: Introductionmentioning

confidence: 99%

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Physico-Mechanical Properties of Metal Matrix Self-Lubricating Composites Reinforced with Traditional and Nanometric Particles

et al. 2022

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Innovative nanostructured materials offer the possibility of enhancing the tribological performance of traditional materials like graphite and molybdenum disulfide (MoS2). In this study, the scratch resistance of two different copper powders, dendritic and spherical, and their composites with traditional MoS2, nanometric MoS2, and graphene nanoplatelets was investigated. Metal powder metallurgy was employed to produce composite materials with 5 wt% and 10 wt% of each solid lubricant. A ball milling step was employed to grind and mix the matrix copper powder with the lubricants. The use of a cold press combined with the sintering in inert atmosphere at 550 °C limited the oxidation of the copper and the degradation of the solid lubricants. The so-produced materials were characterized through a variety of techniques such as micro-indentation hardness, electrical resistivity, contact angle wettability, X-ray diffraction, Raman scattering, and scanning electron microscopy. Moreover, micro-scratch tests were performed on both pure copper and composite materials for comparing the apparent scratch hardness and friction coefficients. The scratches were examined with confocal laser scanning microscopy (CLSM), to identify the evolution of the damage mechanisms during the formation of the groove. The results highlighted the important difference between the dendritic and spherical copper powders and demonstrated a way to improve wear behavior thanks to the use of nanometric powders as solid lubricants.

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Section: Micro-indentation Hardnesssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physico-Mechanical Properties of Metal Matrix Self-Lubricating Composites Reinforced with Traditional and Nanometric Particles

et al. 2022

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“…Suspended graphene’s high reported thermal conductivity of 3,000–5000 W·m -1 ·K -1 can degrade to 600 W·m -1 ·K -1 when contact is made with a substrate, owing to graphene–substrate coupling and phonon scattering across the interface (Seol et al , 2010). Despite the limited thermal conductivity of supported graphene, its application to such things as copper-based composites results in improved mechanical properties (Balandin, 2011), including their friction coefficients, wear rates, and mechanical strengths (Chen et al , 2016; Chmielewski et al , 2016; Dutkiewicz et al , 2015).…”

Section: Discussionmentioning

confidence: 99%

Thermal effects of copper-graphene composite films in a human skin analogous for the application to clothing

Shin

Choi

et al. 2020

IJCST

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PurposeThe purpose of the study was to explore heat-accumulative and thermal-conductive characteristics of copper-graphene composite film (Cu-G film) while applying it to a human-skin analogue.Design/methodology/approachIn the preliminary experiment, the authors evaluated the thermal conductive characteristics of the Cu-G film in three covered conditions (no film, copper film, and Cu-G film conditions). For the first factorial experiment, the heat-accumulative properties over heated pig skin were compared at air temperatures of 10, 25 and 35°C. For the second factorial experiment, 105 trials were conducted on pig skin by combining air temperatures, trapped air volumes, and numbers of film layers.FindingsThe results from the preliminary experiment showed that the Cu-G film distributed the surface heat to the outside of the Cu-G film, which resulted in even distribution of heat inside and outside the Cu-G film, whereas the copper film accumulated heat inside the copper film. The human-skin analogue of pig skin, however, showed the opposite tendency from that of the plastic. The pig-skin temperatures beneath the Cu-G film were higher than those beneath the copper film, and those differences were remarkable at the air temperature of 10°C. The accumulative heat was affected by the trapped air volume, fit to the skin, and number of Cu-G film layers.Originality/valueIn conclusion, the Cu-G film more effectively accumulated heat on the human-skin analogue than copper film, and those effects were more marked in cold environments than in mild or hot environments.

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“…3-fold increase for copper/graphene vs. pure copper), wear resistance, thermal/electrical conductivity and fatigue resistance (5-6x enhanced fatigue resistance for copper/graphene vs. pure copper). [10][11][12][13][14][15][16][17] The improved properties are often dominated by the interfacial interaction between the metal/2D-material interface. 18,19 For instance, weakly interacting interfaces such as copper/graphene can minimize crack-formation/crack-propagation resulting in improved fatigue life within nanoscale composite lms.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Interactions and Tribological Behaviour of Metal-Oxide/2D-Material Contacts

Yadav

Arif

Wang

et al. 2021

Preprint

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This work combines experimental atomic force microscopy (AFM) and DFT simulations to study oxidized metal (oxidized copper & titanium) and 2D material (graphene & MoS2) interfaces. Combining AFM and DFT allowed identifying the interfacial interaction and established a correlation between tribological behavior, interfacial charge distribution, and variations in the potential energy profile with sliding along the metal/2D-materials interfaces. The TiO2 (rutile) and CuO (cupric oxide) metal oxides were mostly found to chemisorb along the interface with the 2D-materials. Both the metal-oxide counter-surfaces (TiO2 and CuO) exhibited higher friction force and adhesion on graphene than on MoS2. The CuO surface was inferred to be copper rich based on comparison with DFT simulations. The interfacial electronic charge distribution and relative energy change were identified to strongly influence sliding and adhesive behavior between oxidized-metal/2D-material contacts when considering only electronic effects in the DFT simulations. More homogenous interfacial charge distribution/sharing and lower surface energy variation, as found on the MoS2 surfaces, were identified to lower friction and adhesion. Non-electronic effects not captured by simulations were found to likely dominate interfacial shear strength measurements experimentally. Therefore, MoS2 should be used in interfacial applications involving TiO2 and copper rich CuO surfaces requiring lower adhesion and friction.

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Tribological Behaviour of Copper-Graphene Composite Materials

Cited by 19 publications

References 15 publications

Physico-Mechanical Properties of Metal Matrix Self-Lubricating Composites Reinforced with Traditional and Nanometric Particles

Physico-Mechanical Properties of Metal Matrix Self-Lubricating Composites Reinforced with Traditional and Nanometric Particles

Thermal effects of copper-graphene composite films in a human skin analogous for the application to clothing

Interfacial Interactions and Tribological Behaviour of Metal-Oxide/2D-Material Contacts

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