Comparison study of Sn and Bi addition on microstructure and bio-degradation rate of as-cast Mg-4wt% Zn alloy without and with Ca-P coating

Moussa, M. E.; Mohamed, Hadeer; Waly, Mostafa I.; Al-Ganainy, G.S.; Ahmed, Adnan; Talaat, M.S.

doi:10.1016/j.jallcom.2019.03.363

Cited by 14 publications

(6 citation statements)

References 31 publications

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“…[ 54 ] The areas can provide sites for DRXed grains nucleation, and the high stress can drive DRXed grains formation. [ 55 ] Therefore, it can be concluded that the more the microscale second phase, the more the DXRed nucleation sites and the more likely to promote the formation of fine DRXed grains. Besides, the nanoscale second phase can hinder the migration of DRXed grains.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion

Wen

et al. 2021

Materials & Corrosion

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To enhance the mechanical properties and poor corrosion resistance of magnesium alloy in vitro, the as‐cast Mg–2Zn–0.5Zr–1.5Dy (mass%) magnesium alloy was subjected to two types of extrusion treatment, one is hot extrusion (denoted as ET alloy), the other is heat treatment followed by hot extrusion (denoted as HE alloy). The microstructure, mechanical properties, and corrosion behaviors of these extruded alloys are assessed. The results show that the HE alloy has superior mechanical properties and a slower corrosion rate than the ET alloy. The yield strength and elongation of the HE alloy reach 287 ± 10 MPa and 17.6 ± 0.5%, respectively, and its corrosion rate is only 0.59 ± 0.16 mm year−1. After hot extrusion, microscale and nanoscale second‐phase exist in the extruded alloys, and the nanoscale second‐phase can improve their mechanical properties by second‐phase strengthening. However, the presence of microscale second phase can cause galvanic corrosion and result in poor corrosion resistance. The HE alloy has good properties due to it containing more nanoscale second‐phase and fewer microscale second‐phase.

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Section: Discussionmentioning

confidence: 99%

Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion

Wen

et al. 2021

Materials & Corrosion

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“…Because the Nd 2 O 3 film was stable and compact, it improved the ability of the alloy to resist the penetration of immersion solution. In addition, Moussa et al compared the corrosion rates of Mg–4Zn and Mg–4Zn–0.5Sn and found that SnO 2 stabilized the Mg(OH) 2 structure in the corrosion layers, thereby suppressing the degradation of the mixed Mg(OH) 2 –SnO 2 oxide layers and forming a better barrier against corrosion than a pure Mg(OH) 2 layer. Furthermore, Xiong et al produced a passivation film on a ZK60 alloy surface through MAO and electrochemical deposition methods.…”

Section: Corrosion Modification Mechanism In Biodegradable Mg Alloysmentioning

confidence: 99%

Progress in Research on Biodegradable Magnesium Alloys: A Review

Wen

et al. 2020

Adv Eng Mater

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Magnesium alloys have great potential as biodegradable materials and have attracted much attention in recent years. Much effort has been expended to improve the properties of biodegradable alloys. Herein, various methods for improving the mechanical properties and biocorrosion resistance of magnesium alloys are discussed in detail, including alloying, thermal processing, and surface modification. The mechanisms by which the mechanical properties of alloys are modified are described, including grain refinement strengthening, solid solution strengthening, dislocation strengthening, and precipitation strengthening. On the basis of previous studies, the mechanisms underlying modifications to the biocorrosion resistance of magnesium alloys are summarized as grain refinement, grain growth, the formation of a passivation film, reduction in cathode-anode potential difference, second-phase barrier function, and texture formation. Finally, the remaining problems are summarized and directions for future research are indicated.

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“…Ca and P play a significant role in bone regeneration, and their coatings and additions improve osteointegration. The coatings of calcium and phosphorous does two things to improve the degradation rate and decrease it [25,26]. The mechanical alloying method has the advantage of having porous surfaces for GBR and, also, enhances cell attachment.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Degradability, Microstructural Evaluation, and Biocompatibility of Zn-Ti-Cu-Ca-P Alloy

Navaneethakrishnan¹,

Palaniyandi²,

Palanisamy

et al. 2022

Nanomaterials

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According to the modern era, zinc is one of the best replacements for human bio-implants due to its acceptable degradation, nominal degradable rate, and biocompatibility. However, alloying zinc with other nutrient metals is mandatory to improve the mechanical properties. In this research, Zn-4Ti-4Cu was alloyed with calcium and phosphorous through a powder metallurgical process to make guided bone regeneration (GBR). First, the sintering temperature of the alloy was found with the usage of thermogravimetric analysis (TGA). Tensile and compression tests showed the suitability of the alloy in strength. The microstructural characteristics were provided with EDS and SEM. The different phases of the alloy were detected with X-ray diffraction (XRD). We can clearly depict the precipitates formed and the strengthening mechanism due to titanium addition. An electrochemical corrosion (ECM) test was carried out with simulated body fluid (Hank’s solution) as the electrolyte. Cytotoxicity, biocompatibility, mechanical properties, and corrosion resistance properties were studied and discussed.

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Comparison study of Sn and Bi addition on microstructure and bio-degradation rate of as-cast Mg-4wt% Zn alloy without and with Ca-P coating

Cited by 14 publications

References 31 publications

Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion

Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion

Progress in Research on Biodegradable Magnesium Alloys: A Review

In Vitro Degradability, Microstructural Evaluation, and Biocompatibility of Zn-Ti-Cu-Ca-P Alloy

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