@article{SUN2024, 
author = {Wei SUN and Jiaxin YE and Qingrui SONG and Yi FENG and Xiaojun LIU},
title = {Ultralow friction PTFE/PEEK heterolayer: A new solid lubrication approach toward simplicity},
year = {2024},
journal = {Friction},
volume = {12},
number = {1},
pages = {120-135},
keywords = {ultralow friction, anti-wear, polytetrafluoroethylene (PTFE), heterolayer (HL)},
url = {https://www.sciopen.com/article/10.1007/s40544-023-0747-9},
doi = {10.1007/s40544-023-0747-9},
abstract = {Tribological applications of polytetrafluoroethylene (PTFE) are often limited by technological complexity to overcome its poor wear resistance. Here, a PTFE/polyetheretherketone (PEEK) heterolayer (HL) was proposed and evaluated as a new solid lubrication solution. Pin-on-disk tribometry found the lowest friction coefficient (μ) of 0.031 and ultralow wear for the PEEK/HL under typical conditions. The friction coefficient of the HL surpasses those of the state-of-the-art polymeric coatings/composites by at least 200%, and approaches that of highly lubricated interfaces. Mechanistic investigations revealed multi-length physical and chemical heterogeneity of the HL that best facilitates a tribofilm with high subsurface stability and surface instability. The technological simplicity and robustness of the HL’s high lubricity make it a promising new type of solid lubrication toward greater reliability and longevity.}
}