Strength and Reliability Performance of Hydroxyapatite Coatings on Titania Treated Ti6Al4V Alloy Using Sol-Gel Precursor

Balakrishnan, Avinash; Lee, Byoung Cheon; Kim, Taik Nam; Panigrahi, Bharat B.

doi:10.4028/www.scientific.net/ssp.124-126.1161

Cited by 2 publications

(1 citation statement)

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“…In addition, significant improvement of corrosion resistance is noted after applying TiO 2 coating, as the corrosion current density of Ti samples (~9.5 × 10 −7 A/cm 2 ) reduced to (~4.2 × 10 −5 A/cm 2 ) with the coated samples. In another study, Balakrishnan et al [ 126 ] found that the role of TiO 2 interlayer in reducing the mismatch of the thermal expansion coefficient between the HAp layer and Ti6Al4V substrate can effectively produce crack-free HAp coating and reduce the delamination in the interface. The bonding strength in this study promoted from 15.8 ± 7 MPa to 40.3 ± 3 MPa after introduction of TiO 2 .…”

Section: Engineering Of the Interfacementioning

confidence: 99%

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

et al. 2020

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With the growing demands for bone implant therapy, titanium (Ti) and its alloys are considered as appropriate choices for the load-bearing bone implant substitutes. However, the interaction of bare Ti-based implants with the tissues is critical to the success of the implants for long-term stability. Thus, surface modifications of Ti implants with biocompatible hydroxyapatite (HAp) coatings before implantation is important and gained interest. Sol-gel is a potential technique for deposition the biocompatible HAp and has many advantages over other methods. Therefore, this review strives to provide widespread overview on the recent development of sol-gel HAp deposition on Ti. This study shows that sol-gel technique was able to produce uniform and homogenous HAp coatings and identified the role of surface pretreatment of Ti substrate, optimizing the sol-gel parameters, substitution, and reinforcement of HAp on improving the coating properties. Critical factors that influence on the characteristics of the deposited sol-gel HAp films as corrosion resistance, adhesion to substrate, bioactivity, morphological, and structural properties are discussed. The review also highlights the critical issues, the most significant challenges, and the areas requiring further research.

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Section: Engineering Of the Interfacementioning

confidence: 99%

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

et al. 2020

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Sol–gel derived hydroxyapatite coating on titanium implants: Optimization of sol–gel process and engineering the interface

Jaafar

Schimpf

Mandel

et al. 2022

Journal of Materials Research

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Sol–gel derived hydroxyapatite coatings on metallic implants are important to promote their osseointegration and biocompatibility. However, such coatings generally suffer from drawbacks that limit implant longevity. In this study, the sol gel process to prepare hydroxyapatite was optimized and used to deposit a hydroxyapatite layer on Ti6Al4V. Samples were pretreated by thermal oxidation, sol–gel coating, and anodization to produce titanium dioxide interlayers with various structures. The results of structural and thermal analysis have determined the optimal preparation parameters to produce monophasic and crystalline hydroxyapatite. The introduction of titanium dioxide intermediate layers produced crack-free hydroxyapatite films and promoted the adherence and integrity of the coating, where the adhesive strength was remarkably improved. Furthermore, potentiodynamic polarization tests in simulated body fluid revealed low corrosion rates and high protection property of the hydroxyapatite/titania coated samples, making these structures promising for the coatings of bone replacements. Graphical abstract

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Strength and Reliability Performance of Hydroxyapatite Coatings on Titania Treated Ti6Al4V Alloy Using Sol-Gel Precursor

Cited by 2 publications

References 20 publications

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

Sol–gel derived hydroxyapatite coating on titanium implants: Optimization of sol–gel process and engineering the interface

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