| Popis: |
In this chapter, synergistic effects between graphene/graphite and glycerol are investigated and proved to be effective to achieve superlubricity for steel, carbon coating, and ceramics counterfaces. The sources of carbon could be graphite-containing materials, graphite from penciling, or tribo-induced graphene-like structures from glycerol. Furthermore, perfectly layered or ordered graphite (such as highly ordered pyrolytic graphite) is not necessary for friction reduction. Higher content of graphitic clusters in tetrahedral amorphous carbon shows shorter running-in period and lower friction than poorer one. The benefit of cooperating graphite/graphene and glycerol is to provide aromatic carbon sources which could serve as precursors to form oxygen- or nitrogen-containing lamellar graphitic structures in contacts. |
