What is molybdenum disulfide used for?
Molybdenum disulfide is used traditionally in greases for bit lubrication . In addition, polymers of 2-methylpropene (i.e., isobutene) and metal soaps are used to formulate synthetic greases [7]. A viscosity of 600-750 c P at 120 °C is desirable.
Is molybdenum disulfide a good lubricant?
The availability of high purity molybdenum disulfide spurred extensive investigations into its lubrication properties in various environments during the late 30’s and 40’s. These investigations demonstrated its superior lubrication properties and stability under extreme contact pressures and in vacuum environments.
Which type of lubricant is molybdenum disulfide?
Molybdenum disulfide is used as a dry lubricant in, e.g. greases, dispersions, friction materials and bonded coatings. Molybdenum-sulfur complexes may be used in suspension but more commonly dissolved in lubricating oils at concentrations of a few percent.
Is MoS2 liquid lubricant?
Abstract: Molybdenum disulfide (MoS2) is one of the most broadly utilized solid lubricants with a wide range of applications, including but not limited to those in the aerospace/space industry.
What is Moly oil?
Molybdenum Disulfide, simply known as Moly, is used both independently as a dry lubricant and as an additive in lubricating greases. Dry lubricants reduce friction between two sliding surfaces without the need for an oil medium.
Does Moly grease dry out?
What is molybdenum disulfide grease?
Description. Molybdenum Disulphide Grease is a multipurpose grease with MoS2 for Constant-Velocity (homokinetic) joints. Also recommended for the lubrication of heavily loaded plain bearings, chassis lubrication points, earthmoving equipment and agricultural machinery.
What is Moly grease used for?
Moly greases are generally used in operations where high pressure metal surfaces are sliding against each other. These include roller bearings that have very heavy loads and shock loading. Moly greases are also recommended in slow or oscillating motion that is used in universal and CV joints.
What is the stoichiometry of molybdenum disulfide?
From RBS, the stoichiometry S:Mo has been calculated and is equal to 2 as in molybdenite. The chemical composition is homogeneously distributed through the whole coating thickness. 13.4. ULTRALOW AND SUPERLOW FRICTION OF MoS 2 COATINGS Molybdenum disulfide (MoS 2) has long been known as low friction material.
Can crystal orientation mechanism explain superlubricity of MOS?
POSSIBLE EXPLANATION FOR SUPERLUBRICITY OF MoS 2 To explain the new result, it was necessary to introduce another crystal orientation mechanism in the friction process: the friction-induced rotation of crystallites around the c-axis [15].
Is superlubricity related to the origin of friction?
Shinjo [17] has shown that superlubricity is related to the atomistic origin of friction and that the phenomenon occurs when the sum of the force acting on each moving atom against the entire system vanishes. Frictionless sliding between two crystal atomic planes needs three conditions to be satisfied:
Is boundary lubrication superlubrication?
TOWARDS SUPERLUBRICITY UNDER BOUNDARY LUBRICATION Compared with Hydrodynamic (HD) and Elasto-Hydrodynamic (EHD) Lubrication regimes, Boundary Lubrication (BL) is mainly governed by tribochemical phenomena. Under boundary lubrication, friction coefficient is in the 0.1 range due to the action of organic polar compounds.