Journal
METALS
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/met9020170
Keywords
self-lubricating; composite coating; titanium; plasma electrolytic oxidation (PEO); polytetrafluoroethylene (PTFE)
Funding
- Natural Science Foundation of Hebei Province [E2016203270]
- Returned Overseas Chinese Talents Foundation of Hebei Province [CL201726]
- Fundamental Research Foundation of Yanshan University [020000904]
- Doctoral Foundation of Yanshan University [B942]
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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.
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