title: Evaluation of physicochemical properties of surface modified Ti6Al4V and Ti6Al7Nb alloys used for orthopedic implants.
abstract: The paper presents the results of selected functional properties of TiO2 layers deposited by ALD method on the surface of Ti6Al4V and Ti6Al7Nb alloys intended for implants in bone surgery. TiO2 layer was applied at the constant temperature of the ALD process at T=200°C at a variable number of cycles, which resulted in a different layer thickness. Different process cycles of 500, 1250, and 2500 were analyzed. The application of experimental methods (AFM, SEM, wettability, potentiodynamic test, EIS, scratch test, nanohardness and layer thickness) enabled to select the optimal number of cycles, and thus the thickness of the TiO2 layer of the most favorable functional properties. The obtained results clearly showed that regardless of the type of titanium substrate, the TiO2 layer applied in a 2500cycle ALD process has the best physicochemical and electrochemical properties. These properties have major impact on biocompatibility, and therefore the quality of the final product. The information obtained can be useful for manufacturers of medical devices involved in the production of implants used in reconstructive surgery of skeletal system.
authors: Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800 Zabrze, Poland.
authors: Marcin
authors: M
authors: Basiaga
authors: Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800 Zabrze, Poland,. Electronic address: wojciech.kajzer@polsl.pl.
authors: Wojciech
authors: W
authors: Kajzer
authors: Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800 Zabrze, Poland.
authors: Witold
authors: W
authors: Walke
authors: Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800 Zabrze, Poland.
authors: Anita
authors: A
authors: Kajzer
authors: Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800 Zabrze, Poland.
authors: Marcin
authors: M
authors: Kaczmarek
mesh_terms: D000497:Alloys; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D020007:Implants, Experimental; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000497:Alloys; D020099:Coated Materials, Biocompatible; C070282:Ti-6Al-7Nb alloy; C031462:titanium alloy (TiAl6V4); C009495:titanium dioxide; D014025:Titanium
keywords: ALD; Electrochemical properties; Mechanical and physicochemical properties; Ti6Al4V; Ti6Al7Nb; TiO(2)