Frictional Behavior of (PEI/GO)x Solid Lubricant Coatings on Steel Substrates in Various Environments - (PPT)

摘要

Steady-state friction coefficients were reduced by: dry H_2 ～ 14 and dry N_2 ～29. A strong influence of environments (i.e., moisture and dry) on friction behavior of (PEI/GO)_n have been observed. Higher thickness coatings ((PEI/GO)_(10&15)) has superior tribology than thin (PEI/GO)_5 bi-layer. The moisture in ambient air has restricted the graphene oxide flakes to form a easy rolling configuration (nanoshells). Dry environments promote the formation of scroll like configuration which indeed reduced the friction to least values (COF ～ 0.02). Dry hydrogen intercalated with oxygen groups of GO to form water, which affects the sliding behavior of GO.