Self-Lubricating PEO–PTFE Composite Coating on Titanium

Abstract

A self-lubricating plasma electrolytic oxidation–polytetrafluoroethylene (PEO–PTFE) composite coating was successfully fabricated on the surface of commercially pure titanium by a multiple-step method of plasma electrolytic oxidation, dipping and sintering treatment. The microstructure and tribological properties of the PEO–PTFE composite coating were investigated and compared with the PEO TiO2 coating and the PTFE coating on titanium. Results show that most of the micro-pores of the PEO TiO2 coating were filled by PTFE and the surface roughness of PEO–PTFE composite coating was lower than that of the PEO TiO2 coating. Furthermore, the PEO–PTFE composite coating shows excellent tribological properties with low friction coefficient and low wear rate. This study provides an insight for guiding the design of self-lubricating and wear-resistant PEO composite coatings.

Developing Super-Hydrophobic and Abrasion-Resistant Wool Fabrics Using Low-Pressure Hexafluoroethane Plasma Treatment

“…The presence of fluorine atoms on the surface of plasma-treated wool fibre could also induce a lubrication effect and improve the abrasion resistance of wool fabrics. Fluoropolymers are well known for their very low co-efficient of friction, and therefore, they have been widely used in coatings to improve the frictional and wear behaviour of different materials [28]. In fluoropolymers, due to the large size of fluorine atoms, they cover the carbon atoms in the polymer chains.…”

Plasmas Processes Applied on Metals and Alloys

“…A self-lubricating plasma electrolytic oxidation-polytetrafluoroethylene (PEO-PTFE) composite was coated on pure titanium. The PEO-PTFE deposited by this method shows excellent tribological properties with a low friction coefficient and wear rate [5]. A DC-pulse atmospheric-pressure plasma jet (APPJ) was used for rapidly synthesizing Pt-SnO x nanomaterials that were then used as the counter electrodes of dye-sensitized solar cells (DSSCs).…”

The Analysis of Pressed Cups Producing Possibilities from Rolled Bimetallic Al-1050 + Cu-M1E Sheets

“…The third and final process is heat treatment. However, in the case of multilayer products, it often causes the formation of intermetallic phases (even layers), which in turn, generate microcracks or delamination of the welded materials [24][25][26][27][28][29][30][31][32][33][34]. Usually delamination of the welded materials occurs as effect of improper heat treatment [10,18,24,34].…”