The Application of Molybdenum Disulfide in Lubricant
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- Category: Molybdenum knowledge
- Published on 27 August 2013
- Written by 陈桂兰
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MoS2 with particle sizes in the range of 1–100 μm is a common dry lubricant.Few alternatives exist that can confer the high lubricity and stability up to 350 °C in oxidizing environments. Sliding friction tests of MoS2 using a pin on disc tester at low loads (0.1–2 N) give friction coefficient values of <0.1.
Molybdenum disulfide is often a component of blends and composites where low friction is sought. A variety of oils and greases are used, because they retain their lubricity even in cases of almost complete oil loss, thus finding a use in critical applications such as aircraft engines. When added to plastics, MoS2 forms a composite with improved strength as well as reduced friction. Polymers that have been filled with MoS2 include nylon (with the trade name Nylatron), Teflon, and Vespel. Self-lubricating composite coatings for high-temperature applications have been developed consisting of molybdenum disulfide and titanium nitride by chemical vapor deposition.
Examples of some diverse applications of MoS2-based lubricants include two-stroke engines (e.g., motorcycle engines), bicycle coaster brakes,automotive CV and universal joints, ski waxes,] and even some bullets.
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