title: Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising.
abstract: An advanced surface engineering process combining micro-texture with a plasma carburising process was produced on CoCrMo femoral head, and their tribological properties were evaluated by the cutting-edge pendulum hip joint simulator coupled with thin film colorimetric interferometry. FESEM and GDOES showed that precipitation-free C S-phase with a uniform case depth of 10μm was formed across the micro-textures after duplex treatment. Hip simulator tests showed that the friction coefficient was reduced by 20% for micro-metre sized texture, and the long-term tribological property of microtexture was enhanced by the C-supersaturated crystalline microstructure formed on the surface of duplex treated CoCrMo, thereby enhancing biotribological durability significantly. In-situ colorimetric interferometry confirmed that the maximum film thickness around texture area was 530nm, indicating that the additional lubricant during sliding motion might provide exceptional bearing life.
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic; Central European Institute of Technology (CEITEC), Brno 602 00, Czech Republic. Electronic address: yangchun.dg@gmail.com.
authors.forename: Yangchun
authors.initials: Y
authors.lastname: Dong
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Svoboda
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Vrbka
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: David
authors.initials: D
authors.lastname: Kostal
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: Filip
authors.initials: F
authors.lastname: Urban
authors.affiliation: NETME Centre, Institute of Materials Science and Engineering, Brno University of Technology, 616 69, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Cizek
authors.affiliation: Central European Institute of Technology (CEITEC), Brno 602 00, Czech Republic.
authors.forename: Pavla
authors.initials: P
authors.lastname: Roupcova
authors.affiliation: School of Metallurgy and Materials, Birmingham University, B15 2TT UK.
authors.forename: Hanshan
authors.initials: H
authors.lastname: Dong
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: Ivan
authors.initials: I
authors.lastname: Krupka
authors.affiliation: Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Hartl
mesh_terms: D004738:Engineering / Q000379:methods*; D005240:Feasibility Studies; D017276:Friction; D006622:Hip Prosthesis; D006358:Hot Temperature; D055595:Mechanical Phenomena; D058626:Plasma Gases; D013499:Surface Properties; D014800:Vitallium / Q000737:chemistry*
chemical_list: D058626:Plasma Gases; D014800:Vitallium
keywords: Biotribology; Colorimetric interferometry; Friction; Plasma carburising; Surface texturing; Wear