title: In vitro evaluation of the tribological response of Mo-doped graphite-like carbon film in different biological media.
abstract: Complicated tribochemical reactions with the surrounding media often occur at the prosthesis material, which is a dominant factor causing the premature failure in revision surgery. Graphite-like carbon (GLC) film has been proven to be an excellent tribological adaption to water-based media, and this work focused on the friction and wear behavior of Mo-doped GLC (Mo-GLC)-coated poly(aryl ether ether ketone) sliding against Al2O3 counterpart in physiological saline, simulated body fluid, and fetal bovine serum (FBS), which mainly emphasized the interface interactions of the prosthetic materials/lubricant. Results showed different tribological responses of Mo-GLC/Al2O3 pairs strongly correlated with the interfacial reactions of the contacting area. Particularly, a transfer layer was believed to be responsible for the excellent wear reduction of Mo-GLC/Al2O3 pair in FBS medium, in which graphitic carbon and protein species were contained. The wear mechanisms are tentatively discussed according to the morphologies and chemical compositions of the worn surfaces examined by scanning electron microscope as well as X-ray photoelectron spectroscopy.
authors.affiliation: State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou, 730000, P. R. China.
authors.forename: Jinxia
authors.initials: J
authors.lastname: Huang
authors.forename: Liping
authors.initials: L
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Shanhong
authors.initials: S
authors.lastname: Wan
authors.forename: Qunji
authors.initials: Q
authors.lastname: Xue
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002417:Cattle; D017276:Friction; D006108:Graphite / Q000737:chemistry*; D054327:Lubricants / Q000737:chemistry*; D008153:Lubrication; D008422:Materials Testing; D008982:Molybdenum / Q000737:chemistry*; D010084:Oxidation-Reduction; D019736:Prostheses and Implants; D044967:Serum / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D054327:Lubricants; D002244:Carbon; D006108:Graphite; D008982:Molybdenum; D000537:Aluminum Oxide
keywords: PEEK; biological medium; friction and wear; graphite-like carbon; interfacial interactions