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    Application and Function of Molybdenum Disulfide in Brake Pad

    Posted on June 08, 2020 by aemmetal
    Brake pad refers to the friction material fixed on the brake drum or brake disc rotating with the wheel, in which the friction lining and friction pad bears external pressure and produces friction effect to achieve the purpose of vehicle deceleration. The raw materials of brake pads are composed of four parts: binder, reinforcing fiber, friction modifier and filler.
     
    Among them, there are two kinds of friction performance modifiers: (1) antifriction materials: its addition can improve the friction resistance of materials, reduce noise and reduce friction coefficient. Such materials mainly include graphite, molybdenum disulfide, lead, copper, etc. (2) Friction material: it can increase the friction coefficient of the material. Most inorganic fillers and some metals and their oxides belong to this category. Friction performance regulator mainly regulates the thermal stability and working stability of materials.
     
    We can see that molybdenum disulfide powder is often added to the brake pad as antifriction material. Why is that? Because molybdenum disulfide powder has the advantages of good dispersion, wear resistance and noise reduction, it can be added to the brake pad as a friction performance regulator. At the same time, it has the following functions:
     
    1. Antifriction
    The particle size of molybdenum disulfide is 1.5-20 μ m, the friction coefficient is 0.05, the dispersion performance is excellent, and the friction reduction effect is good.
     
    2. Increased friction
    When the friction temperature of friction material increases sharply, molybdenum trioxide appears in the oxidation of molybdenum disulfide, which expands with the increase of temperature and plays a role of increasing friction.
     
    3. Anti oxidation and anti shedding
    Molybdenum disulfide is slightly acidic, covering the surface of friction materials, protecting other materials from oxidation, making it not easy to fall off and has strong adhesion.
     
    4. Expansion
    When the friction materials are in the high temperature state of braking, many low temperature materials such as fillers and resins are easy to be carbonized and lost, resulting in the increase of the internal gap of the materials, while molybdenum trioxide can make up for it better.
     
    5 Reducing specific gravity
    The specific gravity of molybdenum disulfide crystal is 4.5-5.2. With the increase of fineness, the specific surface area is also increased, the specific gravity is reduced, and the weight of brake pad is reduced to a certain extent.
     
    Moreover, the special molybdenum disulfide powder developed by special technology can effectively improve the wear resistance and working stability of brake pad products. AEM provides molybdenum disulfide powder for brake pads. If you are interested, please enter the product page of molybdenum disulfide powder directly to view more.
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