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Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium. [1] The two main dry lubricants are graphite and molybdenum disulfide. They offer lubrication at temperatures higher than liquid and oil ...
One approach has been to progressively reduce lubricant viscosity to minimize hydrodynamic shear, churning and pumping losses. [1] However, this means that an increased number of components operate under boundary lubrication conditions. This has led to a resurgence in interest in friction modifier additives, particularly OFMs.
Friction modifiers or friction reducers, like molybdenum disulfide, are used for increasing engine fuel economy by reducing friction between moving parts. [6] Friction modifiers alter the lubricity of the base oil. Whale oil was used historically. [7] In [8] it's shown how use of anti-friction additives can increase the power efficiency of a motor.
“Lubricants minimize friction during penetrative intercourse, making the experience less uncomfortable or less painful,” says Taniqua Miller, M.D., ob/gyn and expert in midlife and menopause ...
Typically the lubricant-to-surface friction is much less than surface-to-surface friction in a system without any lubrication. Thus use of a lubricant reduces the overall system friction. Reduced friction has the benefit of reducing heat generation and reduced formation of wear particles as well as improved efficiency.
PTFE is a very soft material, thus its friction coefficient becomes worse than that of hardened steel-to-steel mating surfaces under common loads. PTFE is used in composition of sliding bearings where it improves lubrication under relatively light load until the oil pressure builds up to full hydrodynamic lubricating conditions. [citation needed]
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