Nature has a crystal. It is just as fascinating as the Egyptian pyramids and equally as stunning as materials from other worlds. Its beauty led the 17th century alchemists who believed bismuth was a symbol for energy and mystery. The beautiful and mysterious material was a source of light, color, and complex structure. It is included in the “synthesis of the philosopher’s stone”. It is called the crystallization or bismuth.
Let’s talk about bismuth. This is a type of metal that has varying colors from silver to rose. It’s brittle, easily crushable and chemically stable. Bismuth can be found as free metals, and even minerals in nature. Bismuth used to be considered the most stable element, with the largest atomic mass. But it was later discovered that it is extremely radioactive. Bismuth can be considered an environment-friendly brittle metal due to its high resistivity, strong diamagnetic and other properties. It can be used to make low-melting alloys, metallurgical additives, catalysts or medicine. Nano bismuth powder can be substituted for lead as it has excellent lubrication properties and is compatible with the active ingredient sulfur. Nano bismuth is also magneto resistant and can be applied to a variety of purposes. Recent research has shown this.
Bismuth is a Metallurgical Lubricants
Nano bismuth has been widely employed in metallurgical oils.
Two solid surfaces in direct contact during sliding, rolling and impact movements will cause wear. It can result in surface damage, slippage, and even loss of performance. The friction loss is responsible for around one third to one half of current world energy consumption. The widespread use of lubricants in such an environment is greatly encouraged.
Nano-lubricants are now a reality and have blown away many metallurgists in the process. A lubricant must have two functions. Because of the high surface energy of the lubricant oil, nanoparticles can be dispersed and absorbed onto it. The friction is just starting, so the nanoparticles form a layer of physical adhesion on the friction. Nano-lubricants provide a good lubrication result because nanopowder particles have spherical shape and act as “ball bearings”, which improves the performance. In addition, when exposed to high heat and heavy load, the nano-powder particles become flattened between friction surfaces, creating frictionless sliding systems and decreasing wear. Third, adsorption. Third, adsorption. The organic matter that is used to modify nanoparticles can easily be attracted to the surface of frictional metal. A layer of organic composite films is then formed to remove the metal surface. It plays an important role in reducing friction and antiwear. Fourth, there is the role of repair. The repair function of nanometer metal powder is to fill in the small pits or damaged areas on the surface.
Bismuth: The Prospect
Bismuth, an environmentally friendly heavy metal element, meets all of these requirements. This element has a positive synergistic relationship with common lubricating-oil additives elements sulfur or phosphorus. The addition of a single nanoparticle of bismuth can clearly improve base oil’s anti-friction performance as well as its bearing capacity. Thus, it is likely that the Nanobismuth powder will become one of the ingredients of green additives to lubricating-oil.
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