Tribological Behavior of VN-MoS<sub>2</sub>/Ag Composites over a Wide Temperature Range

Jing, Weiqi; Du, Shuangming; Chen, Shu; Liu, Eryong; Du, Huiling; Cai, Hui

doi:10.1080/10402004.2021.1992062

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…Abrasive behavior of MoO 3 to several alloys was reported [ 41 , 44 ]. In contradictory, an improvement in tribological behavior upon MoO 3 additions to MoS 2 was seen in ref [ 45 ]. Oxidation of MoS 2 is a function of powder particle size and the accessibility to air [ 7 ], as well as the type and composition of inclusion [ 41 ].…”

Section: Potential High-temperature Solid-lubricantsmentioning

confidence: 94%

Solid Lubrication at High-Temperatures—A Review

et al. 2022

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Understanding the complex nature of wear behavior of materials at high-temperature is of fundamental importance for several engineering applications, including metal processing (cutting, forming, forging), internal combustion engines, etc. At high temperatures (up to 1000 °C), the material removal is majorly governed by the changes in surface reactivity and wear mechanisms. The use of lubricants to minimize friction, wear and flash temperature to prevent seizing is a common approach in engine tribology. However, the degradation of conventional liquid-based lubricants at temperatures beyond 300 °C, in addition to its harmful effects on human and environmental health, is deeply concerning. Solid lubricants are a group of compounds exploiting the benefit of wear diminishing mechanisms over a wide range of operating temperatures. The materials incorporated with solid lubricants are herein called ‘self-lubricating’ materials. Moreover, the possibility to omit the use of conventional liquid-based lubricants is perceived. The objective of the present paper is to review the current state-of-the-art in solid-lubricating materials operating under dry wear conditions. By opening with a brief summary of the understanding of solid lubrication at a high temperature, the article initially describes the recent developments in the field. The mechanisms of formation and the nature of tribo-films (or layers) during high-temperature wear are discussed in detail. The trends and ways of further development of the solid-lubricating materials and their future evolutions are identified.

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Section: Potential High-temperature Solid-lubricantsmentioning

confidence: 94%

Solid Lubrication at High-Temperatures—A Review

et al. 2022

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“…To solve the problem of low bearing capacity and limited application range of pure MoS 2 coating, component doping of MoS 2 -based coating is a typical improvement method. At present, various metal and non-metal elements, such as C, N, Cu, Si, Ta, Ag, Zr, and Ti [4][5][6][7][8][9][10][11], as well as compounds such as TiN and Al 2 O 3 [12,13], have been studied for doping MoS 2 coatings to improve wear resistance. Among them, metal doping can induce the growth of MoS 2 coating with (002) preferred orientation, and the coating structure is more compact, improving the film's wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Tian,

Cai,

Xue

et al. 2023

Lubricants

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Exploring the doping components of the coating is of great significance for improving the tribological properties of the MoS2-based coating. The optimization of magnetron sputtering process parameters can also improve the coating quality. In this paper, the effects of working gas flow rate on the microstructure in a vacuum chamber, nano-hardness, and tribological properties of Ce-Ti/MoS2 coatings were studied using DC and RF unbalanced co-sputtering technology. It is found that the coating structure was coarse and porous when the Ar flow rate was excessive (70 sccm), significantly affecting the mechanical properties; there are pit defects on the surface of the coating when the flow rate is just minor (30 sccm), and the coating easily falls off during the friction process. When the flow rate is 40~60 sccm, the coating grows uniformly, the hardness reaches 7.85 GPa at 50 sccm, and the wear rate is only 4.42 × 10−7 mm3 N−1 m−1 at 60 sccm. The coating doped with Ce and Ti is an approximate amorphous structure. Under appropriate gas flow rate conditions, the friction induces a transfer film with a layered structure, and the MoS2 (002) crystal plane orientation is arranged in parallel at the edge of the wear debris, effectively reducing the shear force during sliding and reducing wear. Based on rare earth doping, this study improves the tribological properties by optimizing the working gas parameters, which plays a reference role in preparing high-quality MoS2-based coatings.

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Application of MoS2 in the space environment: a review

Zhou,

Tong,

Zhang

et al. 2023

Front. Mech. Eng.

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A considerable portion of space mechanism failures are related to space tribological problems. Cold welding in high vacuum; surface erosion and collision damage caused by various radiations, high temperature oxidation under atomic oxygen (AO) bombardment; and thermal stress caused by temperature alternation all alter the physical, chemical, and friction properties of materials. In particular, the space vibration caused by alternating temperatures and microgravity environments can alter the motion of the contact body, further affecting its friction properties. Improving the friction properties of contact surfaces in the space environment is an important way to extend the service life of spacecraft. Traditional lubricants can no longer meet the lubrication requirements of the space environment. This study describes the characteristics of the space environment and the applications of solid lubricants. The friction properties of MoS2, a solid lubricant widely used in space, are discussed. The synergistic lubrication of MoS2 with surface textures or metals is presented. Advances in research on the friction properties of collision sliding contacts in the space environment are reviewed. The combination of MoS2 and soft metals with surface textures is introduced to reduce the effects of vibration environments on the friction properties of moving parts in space mechanisms. Finally, the challenges and future research interests of MoS2 films in space tribology are presented.

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Tribological Behavior of VN-MoS₂/Ag Composites over a Wide Temperature Range

Cited by 5 publications

References 33 publications

Solid Lubrication at High-Temperatures—A Review

Solid Lubrication at High-Temperatures—A Review

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Application of MoS2 in the space environment: a review

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Tribological Behavior of VN-MoS2/Ag Composites over a Wide Temperature Range

Cited by 5 publications

References 33 publications

Solid Lubrication at High-Temperatures—A Review

Solid Lubrication at High-Temperatures—A Review

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Application of MoS2 in the space environment: a review

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Tribological Behavior of VN-MoS₂/Ag Composites over a Wide Temperature Range