Effect of Less Graphene-based SiO2 Nanocomposite Materials on Water Lubricity Properties
ZHANG Shitang1, ZHAO Haichao2, QIAO Yulin2
1 Unit 92228 of PLA, Beijing 102442; 2 National Engineering Research Center for Mechanical Product Remanufacturing, Academy of Armored Force Engineering, Beijing 100072
Abstract: Graphene-based with SiO2 nanocomposite materials were prepared by the melthod of liquid-phase ultrasonic exfoliation. Morphologies of nanocomposite materials were characterized by means of TEM. their tribological properties as a pure water additive were investigated using multi-functional reciprocating friction and wear tester. The morphology, elemental composition and chemical states of typical elements were analyzed by SEM and XPS. The lubrication mechanism of graphene-loaded with SiO2 nanocomposites in water was preliminarily discussed. The results showed that the nano SiO2 evenly distributed in the few layer graphene layer and surface layer; the nanocomposite materials as a pure water additive displayed good friction-reducing and antiwear perfor-mance. The prosperity was attributed to the synergistic effect of the self-repairing effect of nano SiO2 and friction chemical reaction film formed on the worn surface by graphene-loaded with SiO2 nanocomposite which inhibited oxidation of Fe and repaired the wear surface, that reduced friction and wear on the frictional surface.
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