Investigations of structure and properties of layered bioceramic HA/TiO2 and ZrO2/Tio2 coatings on Ti-6Al-7Nb alloy by micro-arc oxidation

Chabuk, Qabas Khalid Naji; Mohammed, Mohammed J.; Dawood, Nawal Mohammed

doi:10.1016/j.matpr.2021.09.038

Cited by 11 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhang et al [44] pointed out that not only the bioactivity and biocompatibility but also the bio-corrosion properties enhanced on hydroxyapatite/TiO 2 coatings produced by PEO. Similar studies have also shown that the hydroxyapatite/TiO 2 composite coatings play an important role in improving corrosion resistance [40,41,45,46] and wear resistance [47,48]. In addition, in vitro, and in vivo studies have also shown that the bioactive hydroxyapatite/TiO 2 layer seems to be a suitable way to achieve other required properties such as rapid osseointegration, enhanced bone-implant contact, implant fixation and biomechanical anchorage [49][50][51].…”

Section: Introductionmentioning

confidence: 85%

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy

Vangolu¹,

Kilic²

2022

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

Plasma electrolytic oxidation coupled with hydrothermal treatment is a relatively new technique to form a hydroxyapatite/TiO2 layer on titanium alloys for biomedical applications. Hence the process allows achieving a bioactive and bactericidal surface by using electrolytes that contain ions (such as calcium-phosphorus and boron) necessary for desired properties. The coating properties are controllable by adjusting the parameters in the PEO process. In the present study, an electrolyte that contains both calcium, phosphorus, and boron ions was used to form a rough and porous oxide layer on Ti6Al7Nb which is known to be less toxic than the most widely used Ti alloy for biomedical applications, Ti6Al4V. A hydroxyapatite and boron-containing oxide layer was obtained after plasma electrolytic oxidation and hydrothermal treatment. Coatings were examined by XRD, XPS, SEM, contact angle measurement system, micro-hardness tester, wear tester, and corrosion measurement system. The results showed that the wear and the corrosion properties of all coated samples increased. Especially boron doping enhanced both the wear and corrosion resistance. Relatively the best corrosion resistance was achieved from CaP-B and the best wear resistance was from HA-B samples. The hardness values and mean surface roughness of all coated samples also increased while the average friction coefficients decreased. The hardness increased from 323 ± 5 HV0.1 to 1084 ± 16 HV0.1 where the coefficient of friction decreased from 0.5672 ± 0.01 to 0.4697 ± 0.03.

show abstract

Section: Introductionmentioning

confidence: 85%

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy

Vangolu¹,

Kilic²

2022

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

show abstract

“…An MAO coating produced on a Ti alloy substrate is composed of TiO 2 . Both rutile and anatase phases can be present in the coatings, and it is possible to alter their concentrations by changing parameters during processing [27,28]; however, the higher photocatalytic activity of the anatase phase may result in a better bacterial property [29].…”

Section: Introductionmentioning

confidence: 99%

Silver Containing Antimicrobial Coatings on Innovative Ti-30Nb-5Mo β-Alloy Prepared by Micro-Arc Oxidation for Biomedical Implant Applications

Cardoso,

Barbaro,

Kuroda

et al. 2024

Coatings

View full text Add to dashboard Cite

Micro-arc oxidation (MAO) is a versatile surface-modification method that promotes higher wear and corrosion resistance, osseointegration, and biological activity to titanium alloys’ surfaces. This study aimed to modify the surface of a recently developed metastable β Ti alloy, which exhibits more favorable mechanical properties for implant applications compared to some commercial Ti alloys, by incorporating Ag into the coatings to introduce a bactericidal function to the surface. The Ti-30Nb-5Mo alloy, with lower elastic modulus, was treated by the MAO method using electrolyte solutions containing calcium acetate, magnesium acetate, β-glycerol phosphate, and varied concentrations of silver nitrate (1.5 mM, 2.5 mM, and 3.5 mM). With an increase in the concentration of silver ions in the electrolyte, the galvanostatic period during the MAO process decreased from 1.7 s to 0.5 s. The Ca/P ratio increased from 0.72 up to 1.36. X-ray diffraction showed that the MAO coatings were formed by rutile and anatase TiO2 main phases and calcium phosphates. X-ray photoelectron spectroscopy analysis detected the presence of amorphous Nb2O5, CaCO3, and MgCO3, and metallic and oxide forms of Ag. The increase in Ag in the electrolyte decreased the coating thickness (from 14.2 μm down to 10.0 μm), increased the contact angle (from 37.6° up to 57.4°), and slightly increased roughness (from 0.64 μm up to 0.79 μm). The maximum inhibition of Enterococcus faecalis, Pseudomonas aeruginosa, and Candida albicans strains growth was of 43%, 43%, and 61%, respectively. The Ag did not negatively affect the differentiation of adipose-tissue-derived mesenchymal stem cells. Therefore, the treatment of the surface of the innovative Ti-30Nb-5Mo alloy by the MAO method was effective in producing a noncytotoxic porous coating with bactericidal properties and improved osseointegration capabilities.

show abstract

“…The choice of nitrogen as the reactive atmosphere for comparison with argon is based on the assumption that SHS of a porous NiTi alloy in a nitrogen gas environment can increase the amount of oxynitrides in the surface layer, thereby improving its corrosion resistance and cytocompatibility. There are known works where the corrosion resistance and cytocompatibility of monolithic nickelide titanium alloys have been increased by applying various titanium oxynitride-based coatings, which are wear resistant, have a favourable effect on cell attachment and proliferation [12][13][14][15][16][17][18]. Properties of titanium oxynitride-based coatings exceed those of titanium nitride-or oxide-based monocoatings .…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Marchenko,

Shishelova,

Baigonakova

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

In the existing studies on the self-propagating high temperature synthesis of titanium nickelide, the main attention has been paid to the study of the influence of heating rate, synthesis start temperature, powder particle size, reaction gas pressure on the structure and properties of NiTi intermetallides. However, the influence of the reactive medium on the formation of surface intermetallic oxynitrides and the properties of the NiTi alloys has not been considered. In the present work, porous titanium nickelide alloys have been obtained by self-propagating high-temperature synthesis in two different reactive atmospheres, argon and nitrogen. The studies show that NiTi-(N) alloys synthesised in the nitrogen reaction atmosphere contain a large amount of brittle secondary Ti2Ni+Ti4Ni2O(N) phases which, in contrast to NiTi-(Ar), are predominantly distributed as small particles. The intergranular Ti2Ni phases in the NiTi-(Ar) alloy synthesised in the argon reaction atmosphere are observed as regions of extensive accumulation of Ti2Ni phase. The reactive nitrogen environment resulted in dispersion of the Ti2Ni phase and lower compressive strength of the porous NiTi-(N) alloy compared to NiTi-(Ar). However, both alloys have a compressive strength greater than human cancellous bone and can be successfully used for intraosseous implantation. At the same time, the porous alloys obtained in different reaction media are passive to electrochemical corrosion and resistant to dissolution in biological media containing chlorine.

show abstract

Investigations of structure and properties of layered bioceramic HA/TiO2 and ZrO2/Tio2 coatings on Ti-6Al-7Nb alloy by micro-arc oxidation

Cited by 11 publications

References 28 publications

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy

Silver Containing Antimicrobial Coatings on Innovative Ti-30Nb-5Mo β-Alloy Prepared by Micro-Arc Oxidation for Biomedical Implant Applications

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Contact Info

Product

Resources

About

Investigations of structure and properties of layered bioceramic HA/TiO2 and ZrO2/Tio2 coatings on Ti-6Al-7Nb alloy by micro-arc oxidation

Cited by 11 publications

References 28 publications

Corrosion and wear performances of hydroxyapatite and boron-containing TiO2 composite coatings on Ti6Al7Nb alloy

Corrosion and wear performances of hydroxyapatite and boron-containing TiO2 composite coatings on Ti6Al7Nb alloy

Silver Containing Antimicrobial Coatings on Innovative Ti-30Nb-5Mo β-Alloy Prepared by Micro-Arc Oxidation for Biomedical Implant Applications

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Contact Info

Product

Resources

About

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy

Corrosion and wear performances of hydroxyapatite and boron-containing TiO₂ composite coatings on Ti6Al7Nb alloy