What are dry lubricants?

dry lubricants are solid chemical compounds, usually in the form of either a powder or a film coating that is used to reduce friction between moving parts. The three most popular types of compounds that have been used for dry lubricants since 2011 are graphite, c; Disulfide molybdenum, mos _{2 ; and Polytrafluorethylene, (c 2 f 4 ) n . Other types that commonly use solid lubricants include boron, BN and tungsten disulfide, WS 2 . The advantages that dry lubricants offer compared to standard lubricants made of oil products such as fat and oil are the ability to withstand a significantly higher temperature without suffering thermal collapse and also cause so many thinner friction barriers and handle high pressures. Typical operating temperatures for dry lubricants range up to 662 ° Fahrenheit (350 ° Celsius). Disulfide molybdenum, for instance, can withstand heat levels up to 2,012 ° Fahrenheit (1,100 ° C) and some dry lubricants can withstand the CRYogenic CHR rangeAdné temperatures that would destroy gases such as nitrogen. When dry lubricants are applied as thin movies, they are often used to stretch ball bearings and the coating itself is durable at a thickness level of only 0.0001 to 0.003 inches (0.00254 to 0.0762 millimeters). Other extreme conditions that can withstand some dry lubricants include pressures of £ 250,000 per square thumb (17 237 bar) in the overall vacuum environment, where liquid oxygen is often stored.}

The main feature of these chemicals that gives them their incredible ability to reduce friction levels is what is called their lamellar structure. This means that the particles inside the lubricant form a series of overlapping lamella or parallel layers on a molecular scale. These Layers slide against each other against each other and prevent two surfaces that are separated from direct contact, even under extreme conditions. Several different compounds have been tested for their lamellar ability and one example of dry film lubricants used for many years, except for simple graphite, is talc or hydrosmor magnesium silicate, mg _{(OH) (OH) (OH) (OH) (OH) (OH) (OH) (OH)}

The four main applications for which dry lubricants are used include extreme conditions such as very high contact pressures and high temperatures. Under such conditions, graphite and MOS _{2 will survive, while liquid oil lubricants will not be. Dry lubricants are also used primarily in machines, where there is a return movement that would push liquid lubricants from the main contact point. Ceramics is another area where solid lubricants have special use because they can be adapted to have the desired chemical reactions Wičemásti that protect.}

Since 2011, two new compounds have also been used, including calcium fluoride, CAF _{2 and CERU Fluoride, CEF 3 . These compounds are not so common because of the costs with them. An example is Cero fluoride, because Cerium itself is a metal of rare countries and it is known that such metals are quite toxic substances. Since 2011, a small direct testing of toxicity for CEF 3 has been carried out for difficulty in obtaining sufficient samples for analysis.}