Adhesion measurement of highly-ordered TiO2 nanotubes on Ti-6Al-4V alloy
Autor: | C. Gamez, Bahman Nasiri-Tabrizi, Brian Ramirez, Ryan Crum, Noor Kasim Hayaty, Wan Basirun Jefrey, Nazatul Sukiman Liana, Abdul Razak Bushroa, Masoud Sarraf, Vijay Gupta |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
Materials science
Annealing (metallurgy) Ammonium fluoride 02 engineering and technology Substrate (electronics) Thermal treatment engineering.material 010402 general chemistry 01 natural sciences laser spallation nanotubes lcsh:TP785-869 chemistry.chemical_compound Coating Spallation titania Ti-6Al-4V Adhesion 021001 nanoscience & nanotechnology 0104 chemical sciences adhesion chemistry Chemical engineering lcsh:Clay industries. Ceramics. Glass Ceramics and Composites engineering 0210 nano-technology Layer (electronics) |
Zdroj: | Processing and Application of Ceramics, Vol 11, Iss 4, Pp 311-321 (2017) |
ISSN: | 2406-1034 1820-6131 |
Popis: | Self-assembled nanotubular arrays on Ti alloys could be used for more effective implantable devices in various medical approaches. In the present work, the adhesion of TiO2 nanotubes (TiO2 NTs) on Ti-6Al-4V (Ti64) was investigated by laser spallation and scratch test techniques. At first, electrochemical anodization was performed in an ammonium fluoride solution dissolved in a 90:10 ethane-1,2-diol (ethylene glycol) and water solvent mixture. This process was performed at room temperature (23°C) at a steady potential of 60 V for 1 h. Next, the TiO2 nanotubes layer was heat-treated to improve the adhesion of the coating. The formation of selforganized TiO2 nanotubes as well as the microstructural evolution, are strongly dependent on the processing parameters and subsequent annealing. From microscopic analysis, highly oriented arrays of TiO2 nanotubes were grown by thermal treatment for 90min at 500°C. Further heat treatment above 500°C led to the detachment of the nanotubes and the complete destruction of the nanotubes occurred at temperature above 700°C. Scratch test analysis over a constant scratch length (1000 μm) indicated that the failure point was shifted from 247.4 to 557.9 μm while the adhesion strength was increased from ~862 to ~1814mN after annealing at 500°C. The adhesion measurement determined by laser spallation technique provided an intrinsic adhesion strength of 51.4MPa for the TiO2 nanotubes on the Ti64 substrate. |
Databáze: | OpenAIRE |
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