Synthesis, Corrosion and Bioactivity Evaluation of Gelatin/Silicon and Magnesium Co-Doped Fluorapatite Nanocomposite Coating Applied on AZ31 Mg Alloy

Jafarzadeh, Aliakbar; Ahmadi, Tahmineh; Dehaghani, Majid Taghian; Mohemi, Kamran

doi:10.3103/s1067821218040077

Cited by 9 publications

(8 citation statements)

References 20 publications

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“…Moreover, FA not only provides greater protein adsorption and cell attachment with respect to HA [22], but also promotes proliferation, morphology and differentiation of osteoblast cells [23]. In addition, other investigations show that silicon and magnesium substituted into the fluorapatite structure improve its bioactivity, cell proliferation and cell viability [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of polycaprolactone fumarate/gelatin-based nanocomposite incorporated with silicon and magnesium co-doped fluorapatite nanoparticles using electrospinning method

Ahmadi

Monshi

Mortazavi

et al. 2020

Materials Science and Engineering: C

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of polycaprolactone fumarate/gelatin-based nanocomposite incorporated with silicon and magnesium co-doped fluorapatite nanoparticles using electrospinning method

Ahmadi

Monshi

Mortazavi

et al. 2020

Materials Science and Engineering: C

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“…In the AZ31 alloy, strength and creep resistance decrease due to the softening of the Mg 17 Al 12 phase above 120°C [24]. AZ31 consists of hexagonal tight package α-Mg and eutectic α + β (β phase, called body-centered cubic β-Mg 17 Al 12 phase) phases [25].…”

Section: Resultsmentioning

confidence: 99%

“…The number of samples was 4 × 4 × 3 = 48 samples. Four variations of nozzles (2, 3, 4, 5 mm), four pressure variations (5,15,25,35) bar, and three temperature variations (790, 820 and 850°C).…”

Section: Methodsmentioning

confidence: 99%

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

Akra

Akkaş

Boz

et al. 2020

Russ. J. Non-ferrous Metals

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The aim of this study is to investigate the AZ31 alloy powder production and characterization processes experimentally using the gas atomization method. For this purpose, firstly, the design and production of gas atomization units were done at Karabük University Faculty of Technology Department of Manufacturing Engineering. In this gas atomization unit, the manufacturability of AZ31 powder from magnesium alloys was investigated by the gas atomization method which is one of the production methods by powder metallurgy. The parameters and the literature used in the production of materials similar to the AZ31 alloy are taken into account as producibility parameters. In the gas atomization method, parameters such as nozzle diameter, gas pressure, and temperature must be controlled in order to produce the desired properties in metal powder production. The diameter of the nozzle is crucial because it affects the gas pressure and temperature, the size of the powder, and the shape of the powders. Experimental studies were carried out using 3 different temperatures (790, 820, and 850°C), 4 different nozzle diameters (2, 3, 4, and 5 mm) and 4 different gas pressures (5, 15, 25, and 35 bar). In the molten metal atomization process and in the process of forming a protective gas atmosphere, argon gas was preferred. Scanning electron microscopy (SEM) was used to determine the shape of the AZ31 powders produced, XRD, XRF, and SEM-EDX analyses were used to determine the phases in the internals of the produced powders and percentages of these phases. Laser measurement devices were used for powder size analysis and hardness tests were performed to determine the mechanical properties of the produced powders. The powders produced were pressed into masses at 4 different pressing pressures (300, 400, 500, and 600 MPa). The best sinterability values of the bulked powders and sintering process were performed at 3 different temperatures (500, 550, and 600°C). Density measurements were made after pressing and sintering the powders. As a result of the experimental studies, it was found that the powder size decreased with the increase of the gas pressure but the nozzle diameter, and the powder shape changed to the dripping and the spherical in the ligament and complex form. It has been observed that the temperature has no significant effect on the powder size and shape.

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“…Additionally, gelatin enhances the adhesion, migration, and proliferation of a wide variety of cells [85]. Jafarzadeh et al [86] used the dip-coating technique to deposit a gelatin/Si−Mg−FA nanocomposite coating on AZ31 Mg alloy specimens. In an electrolytic aqueous solution containing NaOH, Na 2 SiO 3 , and KOH, the anodized coating was also developed on the AZ31 Mg alloy.…”

Section: Gelatin Coated On Mg-based Alloymentioning

confidence: 99%

“…The surface of a nanocomposite coating with a homogeneous distribution of nanoparticles in the gelatin matrix was dense, crack-free, well compacted, and uniform, while the surface of an anodized layer was comparatively coarse due to defects, microcracks, and micropores. The ability of nanocomposite-coated specimens to form bone-like apatite is demonstrated by immersion testing in SBF solution [86]. Table 3 summarizes the results of the corrosion properties of polymer-coated and composite coated Mg-based composites and Mg alloys under various corrosion media, and measurement methods.…”

Section: Gelatin Coated On Mg-based Alloymentioning

confidence: 99%

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

et al. 2021

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The development of biodegradable implants is certainly intriguing, and magnesium and its alloys are considered significant among the various biodegradable materials. Nevertheless, the fast degradation, the generation of a significant amount of hydrogen gas, and the escalation in the pH value of the body solution are significant barriers to their use as an implant material. The appropriate approach is able to solve this issue, resulting in a decrease the rate of Mg degradation, which can be accomplished by alloying, surface adjustment, and mechanical treatment. Surface modification is a practical option because it not only improves corrosion resistance but also prepares a treated surface to improve bone regeneration and cell attachment. Metal coatings, ceramic coatings, and permanent polymers were shown to minimize degradation rates, but inflammation and foreign body responses were also suggested. In contrast to permanent materials, the bioabsorbable polymers normally show the desired biocompatibility. In order to improve the performance of drugs, they are generally encapsulated in biodegradable polymers. This study summarized the most recent advancements in manufacturing polymeric coatings on Mg alloys. The related corrosion resistance enhancement strategies and future potentials are discussed. Ultimately, the major challenges and difficulties are presented with aim of the development of polymer-coated Mg-based implant materials.

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Synthesis, Corrosion and Bioactivity Evaluation of Gelatin/Silicon and Magnesium Co-Doped Fluorapatite Nanocomposite Coating Applied on AZ31 Mg Alloy

Cited by 9 publications

References 20 publications

Fabrication and characterization of polycaprolactone fumarate/gelatin-based nanocomposite incorporated with silicon and magnesium co-doped fluorapatite nanoparticles using electrospinning method

Fabrication and characterization of polycaprolactone fumarate/gelatin-based nanocomposite incorporated with silicon and magnesium co-doped fluorapatite nanoparticles using electrospinning method

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

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