Abstract The Argonne National Laboratory of the US Department of Energy recently developed a combination of graphene and diamond, which can completely solve the problems caused by mechanical system friction and achieve zero friction super lubricity. At the atomic scale, friction is caused by atoms that are fixed together. These...
The US Department of Energy's Argonne National Laboratory recently developed a combination of graphene and diamond that completely solves the problems caused by mechanical system friction and achieves zero friction super lubricity. At the atomic scale, friction is caused by atoms that are fixed together, and these atoms cannot move with each other. To overcome this effect, the Argonne National Laboratory uses three key materials: nanodiamond particles, diamond-like carbon surfaces and graphene sheets.
The researchers found that graphene sheets and nanodiamond particles reacted when the diamond-like carbon surfaces were in contact with each other. Graphene revolves around the diamond particles to form a tiny ball-like structure, which the worker calls a nano-axis. These nano-axes can change direction by themselves during the sliding process, thus avoiding the two surfaces being consolidated.
The ultra-lubricity combination brought by the research team has unlimited prospects, but the experiment also found that the diamond/graphene combination can only show super lubricity in a dry environment, but not in a humid environment. Super lubricity. Using an automated calculation program, the researchers found that the presence of a water layer prevented the formation of nano-axes, causing greater friction.
Research institute Sanket Deshmukh said that most mechanical systems are expected to achieve zero friction, but this has always been a very difficult problem. Our research provides critical technical knowledge and discovery for super lubricity in engines, turbines, computer hard drives and microelectromechanical systems.
The study was published in the journal Science Express.
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