Investigation of second phase concentration effects on tribological and electrical properties of Cu–WS2 composites

Freschi, Marco; Virgilio, Matteo Di; Haiko, Oskari; Mariani, Marco; Andena, Luca; Lecis, N.; Kömi, Jukka; Dotelli, Giovanni

doi:10.1016/j.triboint.2021.107357

Cited by 23 publications

(10 citation statements)

References 52 publications

(76 reference statements)

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“…In the work [ 52 ], it was shown that MoS 2 magnetron-sputtered coatings were characterized by friction coefficients at the level of 0.03–0.04. In the case of using the friction pair consisting of a Cu + 20% WS 2 specimen and 100Cr6 steel as a counter-specimen, the friction coefficient obtained by Freschi et al [ 28 ] was higher than that in this study, and was approximately 0.35. Xiao et al [ 53 ] have investigated the effect of the amount of WS 2 on the lubricating properties of Cu-WS 2 composites.…”

Section: Resultscontrasting

confidence: 70%

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Tribological Properties of Cu-MoS2-WS2-Ag-CNT Sintered Composite Materials

et al. 2022

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In this work, in order to produce Cu-MoS2-WS2-Ag-CNT self-lubricating materials, powder metallurgy was used. Several different compositions containing single solid lubricant MoS2, WS2, Ag and CNTs as well as multi-component lubricants in the copper matrix were prepared. Friction and wear tests were carried out using the pin-on-disc method at room temperature. Light microscopy (LM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to characterize the wear mechanism of sintered materials. The tribofilm on the worn surfaces of sintered materials and counter-specimens was observed. The influence of single solid lubricants and the synergistic interaction of two, three or four solid lubricants on tribological properties of sintered composite materials were determined.

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Section: Resultscontrasting

confidence: 70%

“…It can be used at high temperature, under high pressure, in high vacuum and under heavy load. It is chemically inert, non-toxic and non-corrosive to metal [ 7 , 26 , 28 , 29 , 30 ]. Molybdenum disulfide (MoS 2 ) also has a layered structure.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Cu-MoS2-WS2-Ag-CNT Sintered Composite Materials

et al. 2022

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“…The difference between predicted and actual values is quite low. The wear rate and COF values were low at lower loads [27]. But with increase in loads, more plastic deformation and asperities removal causes more wear rate.…”

Section: Validation Of Developed Modelmentioning

confidence: 84%

Prediction of tribological performance of Cu-Gr-TiC composites based on response surface methodology and worn surface analysis

Ankit,

Kumar,

Yadav

et al. 2023

Phys. Scr.

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In the current study, the prediction of tribological performance of Cu-Gr-TiC composites and correlative with surface topography has been studied. For this purpose, the Cu-Gr composites reinforced with TiC ceramic particles were prepared via the powder metallurgy route. The prepared composites microstructure, mechanical characteristics, and dry sliding wear behaviour were assessed. A pin on disc setup was taken for tribological testing where sliding velocity is 1.5 m/s. Wear behaviour of composites was examined using a central composite design (CCD) with three levels. The wear behavior optimization was accomplished through the utilization of response surface methodology (RSM). The input parameters in RSM consisted of sliding distance, varying load, and weight percentage (wt.%) of reinforcements, while the wear rate and coefficient of friction served as the two responses. An analysis of variance (ANOVA) using RSM was conducted to identify the significant parameters influencing the wear rate and coefficient of friction. A quadratic model was suggested based on best fit and a regression equation was established for predicting the tribological properties at any given input parameter. Comparative of experimental and predicted values shows close tolerance. It was observed that RSM is significant tool to predict and optimize the tribological properties. The composite having 3.08 wt.% of TiC particles was optimized for minimum wear rate & COF at 20 N load and 2000 m sliding distance.

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“…The modelling step introduces the need to characterize the mechanical behaviour of the materials of interest, with additional effort (in particular for viscoelastic materials) and uncertainties; however, it allows to establish a correlation between scratch hardness and the effective contact pressure developed between the indenter and the scratched surface, and eventually with the material bulk mechanical properties [15][16][17]. Scratch hardness measured in such a way makes scratch testing a powerful surface probing technique, applicable to the study of degradation phenomena [37][38] or to the optimization of the composition of materials used for tribological applications [39][40]. Within this framework, the aim of the present paper is to validate a scratch-hardness based approach for the characterization of ductile engineering polymers, exploring the limits within such a parameter can be considered an intrinsic material property.…”

Section: Introductionmentioning

confidence: 99%