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Design of Macroscale Solid Superlubricity Towards Engineering

Macroscale superlubricity

Superlubricity is a frontier subject in tribology research. From a theoretical perspective, it refers to the phenomenon where the frictional force between objects in relative motion approaches zero; From an engineering perspective, it refers to the reduction of friction coefficient by 1-2 orders of magnitude compared to traditional lubricants, reaching the level of 0.001 or below. The breakthrough of superlubricity technology is expected to promote the revolutionary progress of industrial technological civilization, but there are still many challenges in obtaining macroscale superlubricity performance. Based on the three superlubricity principles of hydrogen passivation of amorphous carbon films, incommensurate structrual superlubricity and molecular rolling, this report provides some innovative research ideas such as the designs of medium-range ordered structure, heterostructure and self-curling rolling lubrication, and the relevant research progresses are introduced.