Corrosion Resistance Evaluation of HVOF Produced Hydroxyapatite and TiO2-hydroxyapatite Coatings in Hanks' Solution

Melero, H.; Sakai, Rafael Toshio; Vignatti, Claudia Abellan; Benedetti, Assis Vicente; Fernández, J.; Guilemany, J.M.; Suegama, P. H.

doi:10.1590/1980-5373-mr-2017-0210

Cited by 25 publications

(9 citation statements)

References 43 publications

(72 reference statements)

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“…A low corrosion rate with crystalline phase was reported for the HAp coated surfaces, but not the uncoated surfaces. Hortensia et al [172] conducted a comparative research work on the nature of the corrosion of HAp and TiO 2 -HAp-based coatings on a Ti alloy prepared through the high velocity oxygen fuel (HVOF) technique. The outcome exhibited damage to the HAp-based coating due to its dissolution when it was immersed in the simulated body fluid (SBF), but the addition of TiO 2 particles to the HAp resulted in the creation of active protection against the corrosion.…”

Section: Importance Of Hap-based Coatings For the Corrosion Behavior Of Biomaterialsmentioning

confidence: 99%

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

et al. 2021

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Together, 316L steel, magnesium-alloy, Ni-Ti, titanium-alloy, and cobalt-alloy are commonly employed biomaterials for biomedical applications due to their excellent mechanical characteristics and resistance to corrosion, even though at times they can be incompatible with the body. This is attributed to their poor biofunction, whereby they tend to release contaminants from their attenuated surfaces. Coating of the surface is therefore required to mitigate the release of contaminants. The coating of biomaterials can be achieved through either physical or chemical deposition techniques. However, a newly developed manufacturing process, known as powder mixed-electro discharge machining (PM-EDM), is enabling these biomaterials to be concurrently machined and coated. Thermoelectrical processes allow the migration and removal of the materials from the machined surface caused by melting and chemical reactions during the machining. Hydroxyapatite powder (HAp), yielding Ca, P, and O, is widely used to form biocompatible coatings. The HAp added-EDM process has been reported to significantly improve the coating properties, corrosion, and wear resistance, and biofunctions of biomaterials. This article extensively explores the current development of bio-coatings and the wear and corrosion characteristics of biomaterials through the HAp mixed-EDM process, including the importance of these for biomaterial performance. This review presents a comparative analysis of machined surface properties using the existing deposition methods and the EDM technique employing HAp. The dominance of the process factors over the performance is discussed thoroughly. This study also discusses challenges and areas for future research.

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Section: Importance Of Hap-based Coatings For the Corrosion Behavior Of Biomaterialsmentioning

confidence: 99%

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

et al. 2021

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“…Dispersion strengthening by introducing a second phase to its microstructure such as other ceramics, carbon nanotubes or other compounds is deemed to overcome the poor mechanical properties of these coatings. For example, the addition of TiO 2 to HAp (20-80 wt%) coating produced by High-Velocity Oxygen Fuel (HVOF) spraying on Ti6Al4V alloy delayed the HAp dissolution and increased the coating stability in Hank's solution [277]. Similarly, by introducing TiO 2 to fiber HAp by the EPD process it was discovered that the pores of the HAp coating produced from suspension with 50 and 75 wt% fiber HAp can be efficiently infiltrated and filled with TiO 2 nanoparticles which increase the corrosion resistance of the coatings in SBF solution [278].…”

Section: Calcium Phosphates and Hydroxyapatitementioning

confidence: 99%

“…Ultra-porous HAp on Ti alloy Spray pyrolysis [102] HAp-graphene on Ti substrates Cold spraying [107] HAp on Ti substrates Hot isostatic pressing [109] CaP layer on Mg alloy Hydrothermal crystallization [110] Si-HAp coating on Mg-5Zn-0.3Ca alloy Pulse electrodeposition [125] HAp coatings on WE43 Mg alloy EPD and pulse laser deposition (PLD) [276] HAp with TiO 2 on Ti6Al4V alloy High-Velocity Oxygen Fuel (HVOF) spraying [277] Ca-Sr-P coatings on Mg alloy Chemical immersion method [287] Ag-F-HAp coatings on Ti substrate Sol-gel method [288] Ce-doped HAp/collagen coatings on Ti Biomimetic deposition [290] Table 4. Cont.…”

Section: Nitrides Tin On Ti6al4vmentioning

confidence: 99%

Advances in Multifunctional Bioactive Coatings for Metallic Bone Implants

Nikolova

Apostolova

2022

Materials

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To fix the bone in orthopedics, it is almost always necessary to use implants. Metals provide the needed physical and mechanical properties for load-bearing applications. Although widely used as biomedical materials for the replacement of hard tissue, metallic implants still confront challenges, among which the foremost is their low biocompatibility. Some of them also suffer from excessive wear, low corrosion resistance, infections and shielding stress. To address these issues, various coatings have been applied to enhance their in vitro and in vivo performance. When merged with the beneficial properties of various bio-ceramic or polymer coatings remarkable bioactive, osteogenic, antibacterial, or biodegradable composite implants can be created. In this review, bioactive and high-performance coatings for metallic bone implants are systematically reviewed and their biocompatibility is discussed. Updates in coating materials and formulations for metallic implants, as well as their production routes, have been provided. The ways of improving the bioactive coating performance by incorporating bioactive moieties such as growth factors, osteogenic factors, immunomodulatory factors, antibiotics, or other drugs that are locally released in a controlled manner have also been addressed.

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“…HVSFS is a modified type of high-velocity oxy-fuel (HVOF) coating process that utilizes suspensions with the desired composition to deposit a coating layer on substrates [63,64]. Figure 3 represents a schematic view of an experimental HVSFS setup.…”

Section: Bioactive Materials Deposition Techniquesmentioning

confidence: 99%

Coating Techniques for Functional Enhancement of Metal Implants for Bone Replacement: A Review

2019

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To facilitate patient healing in injuries and bone fractures, metallic implants have been in use for a long time. As metallic biomaterials have offered desirable mechanical strength higher than the stiffness of human bone, they have maintained their place. However, in many case studies, it has been observed that these metallic biomaterials undergo a series of corrosion reactions in human body fluid. The products of these reactions are released metallic ions, which are toxic in high dosages. On the other hand, as these metallic implants have different material structures and compositions than that of human bone, the process of healing takes a longer time and bone/implant interface forms slower. To resolve this issue, researchers have proposed depositing coatings, such as hydroxyapatite (HA), polycaprolactone (PCL), metallic oxides (e.g., TiO2, Al2O3), etc., on implant substrates in order to enhance bone/implant interaction while covering the substrate from corrosion. Due to many useful HA characteristics, the outcome of various studies has proved that after coating with HA, the implants enjoy enhanced corrosion resistance and less metallic ion release while the bone ingrowth has been increased. As a result, a significant reduction in patient healing time with less loss of mechanical strength of implants has been achieved. Some of the most reliable coating processes for biomaterials, to date, capable of depositing HA on implant substrate are known as sol-gel, high-velocity oxy-fuel-based deposition, plasma spraying, and electrochemical coatings. In this article, all these coating methods are categorized and investigated, and a comparative study of these techniques is presented.

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Corrosion Resistance Evaluation of HVOF Produced Hydroxyapatite and TiO2-hydroxyapatite Coatings in Hanks' Solution

Cited by 25 publications

References 43 publications

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

Advances in Multifunctional Bioactive Coatings for Metallic Bone Implants

Coating Techniques for Functional Enhancement of Metal Implants for Bone Replacement: A Review

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