2021年6月30日星期三

Inorganic Fullerene / Tungsten Disulfide Composite Lubricant

Fullerene is the third allotrope of elemental carbon was found by a carbon, any elements in spherical, oval shaped structure of the material existence.

In the field of lubricants, tungsten disulfide is a typical layered structure, easy to slip away, it is widely used in the field of lubricants, but tungsten disulfide due to its crystal edge of the unsaturated suspension bond with chemical activity, easy in the friction process oxidized, the tribological properties of graphene are greatly reduced, especially in humid atmosphere. Graphene has good chemical stability, so it is applied in practice, people tend to be tungsten disulfide and graphene compound made of lubricants, but some scholars use inorganic fullerene C60 instead of graphene, and get better results.


The inorganic fullerene structure eliminates the dangling bonds on the edge and has higher chemical inertness. The hollow cage structure can provide higher elasticity and increase the resilience in the load range, in order to reduce the dissipation related to wear, some scholars have used uniaxial shock wave to test the dynamic compressive properties of two tungsten sulfide / inorganic fullerene structures, it is found that the inorganic fullerene structure has excellent compressive wave absorbing ability, and its maximum compressive pressure is high, which is now found in the most tough molecular cage structure, its compressive properties are better than those of other carbon cage like structures, even under lower pressure, it will collapse or transform into other diamond structures. Its compressive properties are better than those of other carbon cage like structures, even under lower pressure, it will collapse or transform into other diamond structures. Therefore, when the inorganic fullerene structure is used as a solid lubricant, it can withstand more graded load conditions, performance is not inferior to graphene / tungsten disulfide composite lubricant, and the environmental strain is stronger than the former.

The study found that the lubricating oil by adding a small amount of inorganic fullerene / two tungsten sulfide composite lubricant can greatly improve its tribological properties, adding a small amount of inorganic fullerene / two tungsten sulfide composite lubricant can significantly prolong the service life of the engine in automobile lubricating oil, reduce fuel consumption of motor vehicles.

Taking spacecraft as an example, the tribological properties of materials in the transition from atmosphere to high vacuum, from low temperature to high temperature and from humid atmosphere to dry atmosphere are extremely demanding, at this point, liquid lubricants are difficult to meet the needs of use. Only inorganic fullerene / two tungsten sulfide can achieve excellent antifriction and wear resistance. In order to reduce the energy consumption of the transmission system, prolong the service life of components and improve the reliability of the system, it provides a new effective way to solve the tribological problems of materials under extreme conditions.

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