Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte
Titanium alloys have good biocompatibility and good mechanical properties, making them particularly suitable for dental and orthopedic implants. Improving their osseointegration with human bones is one of the most essential tasks. This can be achieved by developing hydroxyapatite (HA) on the treatin...
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MDPI AG
2022-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/20/7374 |
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| author | Avital Schwartz Alexey Kossenko Michael Zinigrad Yosef Gofer Konstantin Borodianskiy Alexander Sobolev |
| author_facet | Avital Schwartz Alexey Kossenko Michael Zinigrad Yosef Gofer Konstantin Borodianskiy Alexander Sobolev |
| author_sort | Avital Schwartz |
| collection | DOAJ |
| description | Titanium alloys have good biocompatibility and good mechanical properties, making them particularly suitable for dental and orthopedic implants. Improving their osseointegration with human bones is one of the most essential tasks. This can be achieved by developing hydroxyapatite (HA) on the treating surface using the plasma electrolytic oxidation (PEO) method in molten salt. In this study, a coating of titanium oxide-containing HA nanoparticles was formed on Ti-6Al-7Nb alloy by PEO in molten salt. Then, samples were subjected to hydrothermal treatment (HTT) to form HA crystals sized 0.5 to 1 μm. The effect of the current and voltage frequency for the creation of the coating on the morphology, chemical, and phase composition was studied. The anti-corrosion properties of the samples were studied using the potentiodynamic polarization test (PPT) and electrochemical impedance spectroscopy (EIS). An assessment of the morphology of the sample formed at a frequency of 100 Hz shows that the structure of this coating has a uniform submicron porosity, and its surface shows high hydrophilicity and anti-corrosion properties (4.90 × 10<sup>6</sup> Ohm·cm<sup>2</sup>). In this work, for the first time, the process of formation of a bioactive coating consisting of titanium oxides and HA was studied by the PEO method in molten salts. |
| first_indexed | 2024-03-09T03:33:38Z |
| format | Article |
| id | doaj.art-8ca939138430481a96f1b264a4fb7b8e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T03:33:38Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-8ca939138430481a96f1b264a4fb7b8e2023-12-03T14:51:43ZengMDPI AGMaterials1996-19442022-10-011520737410.3390/ma15207374Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based ElectrolyteAvital Schwartz0Alexey Kossenko1Michael Zinigrad2Yosef Gofer3Konstantin Borodianskiy4Alexander Sobolev5Department of Chemical Engineering, Ariel University, Ariel 4070000, IsraelDepartment of Chemical Engineering, Ariel University, Ariel 4070000, IsraelDepartment of Chemical Engineering, Ariel University, Ariel 4070000, IsraelDepartment of Chemistry, Bar Ilan University, Ramat-Gan 5290002, IsraelDepartment of Chemical Engineering, Ariel University, Ariel 4070000, IsraelDepartment of Chemical Engineering, Ariel University, Ariel 4070000, IsraelTitanium alloys have good biocompatibility and good mechanical properties, making them particularly suitable for dental and orthopedic implants. Improving their osseointegration with human bones is one of the most essential tasks. This can be achieved by developing hydroxyapatite (HA) on the treating surface using the plasma electrolytic oxidation (PEO) method in molten salt. In this study, a coating of titanium oxide-containing HA nanoparticles was formed on Ti-6Al-7Nb alloy by PEO in molten salt. Then, samples were subjected to hydrothermal treatment (HTT) to form HA crystals sized 0.5 to 1 μm. The effect of the current and voltage frequency for the creation of the coating on the morphology, chemical, and phase composition was studied. The anti-corrosion properties of the samples were studied using the potentiodynamic polarization test (PPT) and electrochemical impedance spectroscopy (EIS). An assessment of the morphology of the sample formed at a frequency of 100 Hz shows that the structure of this coating has a uniform submicron porosity, and its surface shows high hydrophilicity and anti-corrosion properties (4.90 × 10<sup>6</sup> Ohm·cm<sup>2</sup>). In this work, for the first time, the process of formation of a bioactive coating consisting of titanium oxides and HA was studied by the PEO method in molten salts.https://www.mdpi.com/1996-1944/15/20/7374biomaterialscoatingscorrosion resistancehydroxyapatitemedical applicationsmolten salt |
| spellingShingle | Avital Schwartz Alexey Kossenko Michael Zinigrad Yosef Gofer Konstantin Borodianskiy Alexander Sobolev Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte Materials biomaterials coatings corrosion resistance hydroxyapatite medical applications molten salt |
| title | Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte |
| title_full | Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte |
| title_fullStr | Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte |
| title_full_unstemmed | Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte |
| title_short | Hydroxyapatite Coating on Ti-6Al-7Nb Alloy by Plasma Electrolytic Oxidation in Salt-Based Electrolyte |
| title_sort | hydroxyapatite coating on ti 6al 7nb alloy by plasma electrolytic oxidation in salt based electrolyte |
| topic | biomaterials coatings corrosion resistance hydroxyapatite medical applications molten salt |
| url | https://www.mdpi.com/1996-1944/15/20/7374 |
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