Why is Molybdenum Disulfide Used As a Lubricant?

(Why is Molybdenum Disulfide Used As a Lubricant?)

The properties of molybdenum disulfide have been studied extensively. Its coefficient of friction is between 0 and 6 and it is stable in neutral and reducing atmospheres up to 1500 degrees Celsius. It is non-corrosive and provides lubrication. Its low oxidation rate and comparatively low reactivity with oxidizing agents make it a desirable choice for many applications.

MoS2 is a chemical compound made up of hexagonal crystal structures, which are linked by Van der Waal forces. The structure allows for low friction and easier application of the metal. Moreover, it has excellent radiation stability and low electrical conductivity. It can withstand temperatures up to 1200oC.

It is a dry lubricant because of its layered structure. It is also useful as a surface coating on machine parts. It is suitable for use in two-stroke engines and gun barrels. Its high compressive strength makes this an excellent choice for anti-galling applications. You can apply molybdenum disulfide using either vacuum sputtering, or loose powder. It can also be combined with other substances, including polymeric materials.

Moly is an excellent anti-wear surface coating, and it helps protect and improve lubrication of metal parts. The additive's effectiveness will be severely reduced if it isn't mixed with oil. The compounds can block oil passageways and filters. As a result, it is important to use Moly with lubricants that are compatible with it.

Molybdenum dioxide is used to lubricate critical equipment and parts. It is an inorganic compound that is insoluble in water and dilute acids. Its hexagonal lamellar crystal arrangement allows it to make effective lubricants in low-temperature and moisture-free environments. The compound also has high yield strength and a strong affinity for metallic surfaces.

Molybdenum disulfide can also be used as a dry oil lubricant. Its layered structure makes it easy to slide with minimal force. Molybdenum disulfide has a lubrication temperature range of 350 to 1100 degrees Celsius. Besides, it is anti-static and thermally conductive.

Monolayer MoS2 can be used in optoelectronic and sensors. Hydrogen peroxide treatment is an effective method to uniformly oxidize monolayer MoS2 and form the intermediate phase MoSxOy. It has been demonstrated that H2O2 treatment can modulate the bandgap for the monolayer MoS2. It is also useful for patterning MoS2 nanomaterials.

MoS2 has a similar oxidation rate to WS2, but it is slower. Moreover, the average particle size does not affect the oxidation rate, but the coarser particles oxidize more slowly. Researchers examined the surface area and oxidation rates of MoS2 and found that it has lower oxidation rate than MO. Ross and SUSSMAN have done a similar study.

There has been some confusion about the application of MO& at high temperature. Some publications cite incorrect data on its melting and sublimation temperatures. However, the work done by SCHOLZ and DOASE has shown that MO& has a sublimation limit. However, in practice, molybdenum disulfide is not useful in high temperature applications.

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(Why is Molybdenum Disulfide Used As a Lubricant?)