Machine Design
An atomthick layer of bonded graphene wonrsquot even let a hydrogen atom penetrate it But when the graphene wears away due to friction in an atmosphere containing hydrogen atoms they can infiltrate the layermdashbut they actually repair it

An atom-thick layer of bonded graphene won’t even let a hydrogen atom penetrate it. But when the graphene wears away due to friction in an atmosphere containing hydrogen atoms, they can infiltrate the layer—but they actually repair it.

Fighting Friction with a Nanolayer of Graphene

Researchers at the Argonne National Laboratory have developed a method of bonding a uniform layer of graphene only one atom-thick directly to steel. In tests, graphene significantly reduced friction and lasted for more than 6,500 wear cycles. For comparison, it takes 1,000 layers of conventional lubricants such as graphite and molybdenum disulfide to last 1,000 wear cycles. The graphene layer continues to reduce friction even in extremely wet or dry environments. Graphite, on the other hand, only works in humid environments, and molybdenum disulfide works best in dry environments. 

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