Solid Lubricant Coatings: Recent Developments and Future Trends

Donnet, C.; Erdemir, Ali

doi:10.1023/b:tril.0000044487.32514.1d

Cited by 338 publications

(162 citation statements)

References 37 publications

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“…In these conditions the conventionally used lubricants cannot be used so under these circumstances the solid lubricants are used. [15] [16]. So under these circumstances, the lubricant is usually used either in its powdered form or in the form of a paste and at times even in the form of a metallic film.…”

Section: Classification Of Fluidsmentioning

confidence: 99%

A Survey on flow meters based on application

Sakthivel¹,

Sudarshan²,

Venkateswaran³

2018

IJET

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Flow meters are those instruments that are used to measure the flow of fluid. The term fluid is a quite general because it involves both liquids and gases, so technically flow meters are those instruments that are used to measure the flow of liquids and gases. There have been numerous classifications for fluids, based on viscosity, operating pressure and temperature and even based on the type of measurement, whether it is done in a conduit or out in the open. The main objective of this paper is to develop a reference table based on the various applications of flow meters.

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Section: Classification Of Fluidsmentioning

confidence: 99%

A Survey on flow meters based on application

Sakthivel¹,

Sudarshan²,

Venkateswaran³

2018

IJET

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“…Although the tribological behaviour of typical solid lubricants such as graphite, DLC, and MoS 2 has been characterized comprehensively [1][2][3] , information about their suitability for hydrogen environment is very limited. Therefore, investigations on the friction and wear behaviour of these materials in the form of anti-friction coatings were carried out.…”

Section: Tribosystems In Hydrogen Environmentmentioning

confidence: 99%

“…Therefore, MoS 2 -lubrication seems to be the optimum solution for this high-duty application in an extreme environment. 2 , and graphite respectively have been tested in hydrogen and inert media such as nitrogen and helium. Typical applications for such material compositions are sliding bearings or retainers in roller bearings.…”

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confidence: 99%

Tribological Behaviour of Solid Lubricants in Hydrogen Environment

Gradt

Theiler

2011

Tribology Online

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For further development of hydrogen technology, it is necessary to have a sufficient number of materials for safe and reliable operation available. Frictional contacts exposed to hydrogen, are critical because of vanishing protective oxide layers in the presence of a chemical reducing environment. Furthermore, liquid lubricants are often not applicable, because of purity requirements, or very low temperatures in the case of liquid hydrogen. Thus, for numerous tribosystems in hydrogen technology, solid lubrication is the only possible method for reducing friction and wear. Therefore, investigations on the tribological behaviour of friction reducing materials, such as PTFE, graphite, DLC and MoS 2 , in inert and hydrogen environment were carried out. The results show that solid lubricants, applied as coatings or as components in polymer composites, are able to reduce friction and wear in gaseous as well as in liquid hydrogen. However, some materials are very sensitive to the environmental medium.

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“…Transition metal dichalcogenides, most notably molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ), are well known for their solid lubricating behavior [1][2][3][4][5][6][7][8][9][10]. In the MoS 2 layered structure, a sheet of molybdenum atoms is sandwiched between two hexagonally packed sulfur layers as shown in Figure 1-1.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MoS2-Au nanocomposite films by sputter deposition.

Goeke¹,

Kotula²,

Prasad³

et al. 2012

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Molybdenum disulfide based solid lubricants, which are well known for their lubricating behavior in dry and inert atmospheres, oxidize in humid environments. This study focuses on the synthesis of Au doped MoS 2 nanocomposite thin films created by co-sputter deposition at various temperatures for environmental robustness. The ratio of the deposition flux was adjusted to control the composition to about 10% Au by weight. (Scanning) transmission electron microscopy (S)TEM revealed that the room temperature deposited nanocomposite consisted of 2-4 nm size Au particles in a matrix of semi-crystalline MoS 2 . With increasing growth temperatures, the nanocomposite exhibited structural changes: the Au nanoparticles coarsened by diffusion-driven Ostwald ripening to 5-10 nm size and the MoS 2 basal planes encapsulated the Au nanoparticles thereby forming a novel solid Au core MoS 2 nano-onion like structures. In situ TEM heating revealed that Au nanoparticles also coarsened, but unlike heating during film growth, the highly ordered basal planes did not encapsulate the Au. Friction and wear tests confirmed that the MoS 2 -Au nanocomposite films grown at elevated temperatures had significantly longer wear life in air with 50% RH as compared with pure MoS 2 . During frictional contact, exfoliation of the MoS 2 basal planes occurred parallel to the sliding direction, providing a thin blanket of lubrication. All the films were found to be deficient in sulfur. Studies during the final phase of the project indicate that near stoichiometric films can be grown by introducing a small dose of H 2 S gas during sputtering.

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Solid Lubricant Coatings: Recent Developments and Future Trends

Cited by 338 publications

References 37 publications

A Survey on flow meters based on application

A Survey on flow meters based on application

Tribological Behaviour of Solid Lubricants in Hydrogen Environment

Synthesis of MoS2-Au nanocomposite films by sputter deposition.

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