Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising.

Autor: Dong Y; 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., Svoboda P; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic., Vrbka M; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic., Kostal D; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic., Urban F; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic., Cizek J; NETME Centre, Institute of Materials Science and Engineering, Brno University of Technology, 616 69, Czech Republic., Roupcova P; Central European Institute of Technology (CEITEC), Brno 602 00, Czech Republic., Dong H; School of Metallurgy and Materials, Birmingham University, B15 2TT UK., Krupka I; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic., Hartl M; Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic.
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2015 Mar; Vol. 55, pp. 215-227. Date of Electronic Publication: 2015 Nov 01.
DOI: 10.1016/j.jmbbm.2015.10.023
Abstrakt: 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.
(Copyright © 2015 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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