Solid lubricity of WS2 and Bi2S3 coatings deposited by plasma spraying and air spraying

Grützmacher, Philipp G.; Schranz, M. Eric; Hsu, Chia-Jui; Bernardi, Johannes; Steiger‐Thirsfeld, Andreas; Hensgen, Lars; Ripoll, Manel Rodríguez; Gachot, Carsten

doi:10.1016/j.surfcoat.2022.128772

Cited by 16 publications

(6 citation statements)

References 42 publications

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“…Analysis of the pattern recorded for GQDs reveals an amorphous structure, which is evident from the diffraction peak at 2θ = 25.8°, that corresponds to the (002) plane of the sp 2 -hybridized carbon atoms in GQDs 21 . In addition, the diffraction peaks at 25.7°, 42.9°, 44.7°, and 54.9° corresponded to the (004), (103), (006), (106), and (008) planes, respectively, which were indexed as the hexagonal phases of WS 2 (JCPDS FILE: 87–2417 and 84–1398) 22 . The patterns corresponding to WM@GQDs show peaks at 12.5°, 32.5°, 38.3°, and 50.1°, corresponding to the (020), (110), (022), and (-202) planes, respectively.…”

Section: Resultsmentioning

confidence: 99%

A novel of WS2–MoCuO3 supported with graphene quantum dot as counter electrode for dye-sensitized solar cells application

Areerob

Hamontree

et al. 2023

Sci Rep

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A novel tungsten disulfide-molybdenum copper oxide composite supported with graphene quantum dots (WM@GQDs) has been synthesized as a counter electrode (CE) for dye-sensitized solar cells (DSSCs) using a simple and low-cost ultrasonication method. The unique structure of WM@GQDs exhibits excellent power conversion efficiency due to its high catalytic activity and charge transport properties. In addition, the graphene quantum dots (GQDs) provide more active sites in the zero-dimensional materials for an I/I3− redox reaction which can improve the electrical and optical properties of the composite. The results indicate that the amount of GQDs in the composite affect the effectiveness of solar devices. When 0.9%wt of GQDs was used, the WM@GQDs composite achieved an efficiency of 10.38%, which is higher than that of the expensive platinum CE under the same conditions. The mechanism behind the improved power conversion efficiency (PCE) of the composite sample is also discussed in detail. Therefore, WM@GQDs can be an efficient material to replace platinum in DSSCs as a CE.

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Section: Resultsmentioning

confidence: 99%

A novel of WS2–MoCuO3 supported with graphene quantum dot as counter electrode for dye-sensitized solar cells application

Areerob

Hamontree

et al. 2023

Sci Rep

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“…The device schematic is shown in Figure 1 [45]. By ionizing gas and bombarding the sample, nitrogen, carbon, and other ions can be injected into the material surface to improve the surface performance and properties [46][47][48][49]. Plasma nitriding/carbonitriding can increase the surface strength of the material, improve its tensile and compressive abilities, and form a compound layer of nitride or carbonitride, which can significantly reduce wear and friction [33,45,[50][51][52].…”

Section: Solid Lubrication Layer Plasma Surface Preparation Technolog...mentioning

confidence: 99%

Solid Lubrication System and Its Plasma Surface Engineering: A Review

Li,

Zhou,

2023

Lubricants

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In aerospace, aviation, nuclear power, and other high-tech fields, some essential moving parts must operate under high vacuum, high load, intense radiation, and other conditions. Under such extreme conditions, only solid lubricating materials can meet the lubrication requirements. Traditional material modification methods have problems such as high energy consumption, severe pollution, and narrow scope of application. Plasma modification technology can overcome these shortcomings. This paper focuses on several commonly used plasma preparation techniques for solid lubricating coatings, including plasma chemical heat treatment, physical vapor deposition, plasma immersion ion implantation and deposition, plasma spraying, and plasma electrolytic oxidation. Subsequently, the material systems of metal-based solid lubrication coatings are reviewed: soft metals, oxides, sulfides, nitrides, and carbon-based materials. Finally, found that the development of new solid lubricants, the improvement of existing preparation technology, and the development of new processes are the key development directions in the future.

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“…However, its adhesive properties to steel substrates are comparatively lower than those of MoS2, as indicated by DFT calculations conducted by Pilotti et al [23]. Previous studies have demonstrated that plasma-sprayed coatings of Bi 2 S 3 exhibit favorable lubricity [24]. Moreover, Bi 2 S 3 has been employed as a grease additive in metal forming applications, enhancing load carrying capacity in reciprocant tests [25].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Interactive Effects of ZDDP, Metal Sulfides, and Carbon Nanotubes on the Lubrication Performance of a PAO Oil

Prieto,

Abdelnabe,

Ovando

et al. 2024

Preprint

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This study investigates the frictional behavior and wear protection capacity of polyalphaolephin (PAO) oils additivated with combinations of zinc dialkyldithiophosphate (ZDDP), metal sulfides, and carbon nanotubes (CNTs) on steel surfaces. Various oil formulations, comprising PAO base oil with differing proportions of ZDDP, metal sulfides, and CNTs, were utilized to lubricate steel-steel contacts in block-on-ring tests. Both the blocks and rings were made of SAE 52100 bearing steel. The testing conditions selected for all the tests were 1 GPa of Hertzian contact stress, 1 m/s of sliding speed, and a total sliding distance of 3,600 m. Surface analysis was performed by means of SEM-EDS, laser confocal microscopy, and Raman microspectrometry. Results indicated that combining metal sulfides or CNTs with ZDDP notably reduced friction compared to ZDDP-only oil, with reductions ranging from 24 to 60%, depending on the formulation. However, wear rates varied considerably among formulations. Those containing ZDDP and Bi2S3 exhibited significant wear rate increases of 160 to 180% compared to ZDDP-only oil. Optimal wear protection for steel surfaces was achieved with ZDDP + CNTs and ZDDP + MoS2 combinations, resulting in wear rate reductions of 19 to 14% respectively.

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Solid lubricity of WS2 and Bi2S3 coatings deposited by plasma spraying and air spraying

Cited by 16 publications

References 42 publications

A novel of WS2–MoCuO3 supported with graphene quantum dot as counter electrode for dye-sensitized solar cells application

A novel of WS2–MoCuO3 supported with graphene quantum dot as counter electrode for dye-sensitized solar cells application

Solid Lubrication System and Its Plasma Surface Engineering: A Review

Exploring the Interactive Effects of ZDDP, Metal Sulfides, and Carbon Nanotubes on the Lubrication Performance of a PAO Oil

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