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Molybdenum Disulfide Enables Good Lubrication for Carbon Motor Brushes

The brush is a kind of conductive component that plays an important role in sending electrical current between motionless and rotating parts by sliding contact. 

Due to its good electrical, thermal and lubricating properties as well as a certain mechanical strength and the instinct to inhibit commutation sparks, all most all DC motors and commutation motors use brushes. Typical applications include electric motors, alternators and electric generators.

Since the performance of the brush has significant impact of the performance of rotating machine, the choice of brush is a critical factor. Usually, carbon motor brushes have special requirements for resistivity and contact resistance, and requires good sliding contact characteristics such as friction coefficient, wear resistance. 

Molybdenum disulfide (MoS2) is the most famous of the single layer transition metal dichalcogenide (TMD) family. It has been used in bulk for many years as a solid state lubricant, this is due to its low coefficient of friction in addition to its high chemical and thermal stability. MoS2 can maintain a very good lubrication effect in mechanical parts that operate in vacuum.

When the brush contains a certain amount of molybdenum disulfide. Although it is difficult to form a cuprous oxide film at high altitude, it can form a sulfide film with good lubricating effect. This film is tightly adsorbed on the surface of the slip ring, so that the brush still has good lubricating performance at high altitude. In addition, molybdenum disulfide has good water resistance and pressure resistance.

Molybdenum disulfide is also an ideal solid lubricating material in the aerospace field. It has a very low friction coefficient and a high yield strength. Therefore, combining the characteristics of the two, the development of a silver-based brush composite material with high conductivity, low friction factor and good mechanical properties is an urgent need for electrical contact components in the aerospace industry.

Chinatungsten online produces professional molybdenum disulfide that is suitable for the electric brush industry, strictly controlling the particle size, water, acid value and other indicators. Our MoS2 can be for a variety of customer needs and purposes. 

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