Evaluating the effects of hydroxyapatite coating on the corrosion behavior of severely deformed 316Ti SS for surgical implants

Mhaede, Mansour; Ahmed, Aymen A.; Wollmann, Manfred; Wagner, Lothar

doi:10.1016/j.msec.2015.01.093

Cited by 16 publications

(10 citation statements)

References 51 publications

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“…The data were extracted from one complete cycle of loading and unloading [15]. The deformation during loading is assumed to be both elastic and plastic as the indenter formed permanent impressions (1) lv cos e = sv − sl on the samples. During unloading, elastic displacement was expected to be recovered and that aid in analysis.…”

Section: Determination Of Young's Modulusmentioning

confidence: 99%

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Effect of particle size and sintering time on the mechanical properties of porous Ti–6Al–4V implant

2020

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Titanium alloys have been extensively used in biomedical applications owing to its low density, excellent biocompatibility (i.e., biological and chemical inertness), and unique mechanical properties. However, there is a high disparity between Young's moduli of the implant and the natural bone. This disparity causes stress shielding in the body. This paper presents the effect of particle size and sintering time of Ti-6Al-4V powder used in the formation of a porous implant, sintered at 980 °C. Morphological characteristics of the sintered samples were obtained with a scanning electron microscope. The effect of surface hydrophilicity of the samples was elucidated via surface wettability testing using contact angle measurement with bio-fluid. Mechanical characterization was also evaluated with nanoindentation and a universal testing machine. The relation between Young's modulus and sintering time was presented. It was observed that the wettability decreases with sintering time and the Ti alloy powder with particle size < 150 µm had the Young's modulus that is closer to the modulus of the bone; the optimum sintering time was 5 h.

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Section: Determination Of Young's Modulusmentioning

confidence: 99%

“…Metal plates have been used as implants to fix or replace lost organs as well as organs with unsatisfied functions [1]. Lane first introduced this method in 1890, where metal plates were used for bone fracture fixation [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size and sintering time on the mechanical properties of porous Ti–6Al–4V implant

2020

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“…A study that is also evaluating the characteristic of hydroxyapatite coating on implant material revealed that the increase of coating thickness could increase corrosion resistant of the implant material and also increase the shear strength of the implant surface. The recommended coating thickness is under 100µm that could stimulate optimum bone growth and osseointegration [14,15]. Another method is conducted to measure the hydroxyapatite coating thickness with coating thickness measurement equipment.…”

Section: Coating Thicknessmentioning

confidence: 99%

“…HA is one of the ceramics materials which has bioactive properties and has a similar characteristic and composition with bones and teeth. In addition, HA can increase the corrosion resistance of SS 316L, accelerate the healing of bones and teeth, and also increase the shear strength of the implant [14,15]. However, HA is brittle and relatively weak material in its acceptable form and cannot be used as a structural bone replacement.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Analysis of Hydroxyapatite Coating on Stainless Steel 316L Using Investment Casting Technique for Implant Application

Nuswantoro¹,

Gunawarman²,

Saputra³

et al. 2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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Osteoporosis and traffic accidents are a significant factor that causes a bone fracture in Indonesia. One solution for the bones fracture treatment is by using fixation implant that has similar characteristics with the human bones. Stainless Steel (SS) 316L is one of biomaterial that has been used as an implant material due to its corrosion resistance, excellent biocompatibility, and excellent mechanical properties. However, the bioactivity properties of the material are needed to improve by coating it with hydroxyapatite (HA). In this research, HA was coated to the surface of 316L SS by using investment casting technique. A slurry of HA was poured into the casting cavity surface prior to the metal casting process and then followed by sintering at temperatures of 850 o C, 900 o C, and 950 o C. Characterization of HA coating layer on specimen surface was conducted by Optical Microscope, Scanning Electron Microscope (SEM), and Energy Dispersive X-Ray (EDX). The hardness of the samples was measured by Vickers Hardness Tester. The result of the experiment shows that the investment casting is successfully to coat the HA on the SS 316L surface. Pouring method produces HA layer with thickness (spongy and porous surface) in the range of 60 µm -110 µm. The increasing of sintering temperature increases the hardness number of the surfaces, and affect the purity of HA, but it is not related to coating thickness. The optimum sintering temperature is obtained at 900 o C which produces the best calcium and phosphate ratio. The investment casting method is found as a simple and non-expensive technique that can be used to coat HA powder to SS 316L that produces good properties and optimum crystallinity of HA that suitable for orthopaedic implant application.

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“…Pitting corrosion is the result of the local destruction of the passive film and subsequent corrosion of the steel underneath this layer. The pit formation is influenced by many factors such as martensite content, dislocation density and internal stresses [65]. A.…”

Section: Soaking Daysmentioning

confidence: 99%

Electrochemical corrosion of Ti6Al4V, Ti and AISI 316L SS after immersed in concentrated simulated body fluid

Büyüksağiş

2016

Prot Met Phys Chem Surf

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The biomimetic method is used to obtain hydroxyapatite (HAP) coatings on Ti6Al4V, Ti and AISI 316L SS substrates. These substrates with different pretreatment surface operations (HNO 3 , anodic polarization, base-acid) were immersed in concentrated simulated body fluids (SBF) for different days at physiologic conditions of 37°C, initial pH of 7.4. Then the corrosion behaviours of substrates after immersion in concentrated SBF were examined by electrochemical methods in Ringer's and 0.9 wt% NaCl solutions at a temperature of 37°C. Ions concentrations and pH analyses were carried out after incubation in concentrated SBF. After immersion in SBF for different days, the surface morphology remains almost unchanged and no apatite formation is observed. Corrosion currents of substrates increased after immersion. Ions concentrations and pH values were shown variability according to soaking time and pretreatment surface operations.

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Evaluating the effects of hydroxyapatite coating on the corrosion behavior of severely deformed 316Ti SS for surgical implants

Cited by 16 publications

References 51 publications

Effect of particle size and sintering time on the mechanical properties of porous Ti–6Al–4V implant

Effect of particle size and sintering time on the mechanical properties of porous Ti–6Al–4V implant

Microstructure Analysis of Hydroxyapatite Coating on Stainless Steel 316L Using Investment Casting Technique for Implant Application

Electrochemical corrosion of Ti6Al4V, Ti and AISI 316L SS after immersed in concentrated simulated body fluid

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