Effect of Ag on the Microstructure, Mechanical and Bio-corrosion Properties of Fe–30Mn Alloy

Liu, Ruoyu; He, Rangan; Chen, Yan‐Xia; Guo, Shuyu

doi:10.1007/s40195-019-00911-5

Cited by 13 publications

(11 citation statements)

References 32 publications

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“…57 This protective AgCl layer can decrease the toxicity. Also, Liu et al 58 showed that the formation of Ag 3 Fe 2 particles can decrease the amount of Ag ions, which decreased the Fe−Mn− Ag alloy toxicity.…”

Section: Resultsmentioning

confidence: 99%

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Bagha

Khakbiz

Sheibani

et al. 2020

ACS Biomater. Sci. Eng.

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The addition of noble elements such as Ag was shown as a successful method to accelerate the corrosion rate of absorbable Fe-based alloys. One major concern of Ag addition is its effect on hemocompatibility and biocompatibility. In this study, in vitro degradation and surface analysis of Fe-30Mn-xAg (x= 0, 1 and 3 wt.%) alloys as well as their effects on hemocompatibility and cell viability of human umbilical vein endothelial cells (HUVECs) were investigated. The static degradation rate of the alloys was 4.97, 4.69 and 4.49 mg/cm 2 for Fe-30Mn, Fe-30Mn-1Ag, and Fe-30Mn-3Ag, respectively. The surface analysis after degradation showed that γ-FeOOH was formed on Fe-30Mn-3Ag, while α-FeOOH was more dominant on Fe-30Mn and Fe-30Mn-1Ag. As γ-FeOOH is more soluble than α-FeOOH, it assists further degradation of Fe-30Mn-3Ag alloy. The high amount of Ag, induced hemolysis ratio however, inhibited coagulation by decreasing the platelet adhesion. Fe-30Mn-1Ag and Fe-30Mn-3Ag alloys shown improved cell viability compared to that of Fe-Mn alloy. Shear yield strength and shear elastic modulus of the samples after immersion tests were increased while the ultimate shear strength was not affected. Based on acceptable hemolysis rate, low platelet adhesion, acceptable cell viability, and appropriate mechanical properties after degradation Fe-30Mn-1Ag can be considered as a suitable blood-contacting Fe-based absorbable alloy.

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Section: Resultsmentioning

confidence: 99%

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Bagha

Khakbiz

Sheibani

et al. 2020

ACS Biomater. Sci. Eng.

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“…The literature gives many different examples of these modifications. Generally, there are several basic types of alloy additives: Noble metals as a second phase composite, like Pd [ 36 , 126 , 127 ], Cu [ 73 , 128 ], Ag [ 125 , 129 , 130 ] cause local galvanic corrosion, because of their high electrochemical potential. The addition of silicon drew the attention of scientists because devices made of the Fe-Mn-Si alloy have shape memory and a higher corrosion rate [ 54 , 68 , 72 , 83 , 131 , 132 ].…”

Section: Iron Materials Modificationsmentioning

confidence: 99%

“…Noble metals as a second phase composite, like Pd [ 36 , 126 , 127 ], Cu [ 73 , 128 ], Ag [ 125 , 129 , 130 ] cause local galvanic corrosion, because of their high electrochemical potential.…”

Section: Iron Materials Modificationsmentioning

confidence: 99%

Biodegradable Iron-Based Materials—What Was Done and What More Can Be Done?

2021

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Iron, while attracting less attention than magnesium and zinc, is still one of the best candidates for biodegradable metal stents thanks its biocompatibility, great elastic moduli and high strength. Due to the low corrosion rate, and thus slow biodegradation, iron stents have still not been put into use. While these problems have still not been fully resolved, many studies have been published that propose different approaches to the issues. This brief overview report summarises the latest developments in the field of biodegradable iron-based stents and presents some techniques that can accelerate their biocorrosion rate. Basic data related to iron metabolism and its biocompatibility, the mechanism of the corrosion process, as well as a critical look at the rate of degradation of iron-based systems obtained by several different methods are included. All this illustrates as the title says, what was done within the topic of biodegradable iron-based materials and what more can be done.

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“…) and KH 2 PO 4 (0.06 g L −1 ), and the value of pH should be kept at 7.4 [5]. When the working electrode was immersed in the SBF solution, the polarization curves were measured by sweeping the potential ranging from − 1.5 V (vs. SCE) to − 0.6 V at a scan rate of 0.1 mV s −1 .…”

Section: Electrochemical Corrosion Measurementsmentioning

confidence: 99%

“…Nowadays, biodegradable metallic materials (BMMs), such as zinc (Zn) [1][2][3][4], iron (Fe) [5], magnesium (Mg) [6][7][8] and their related alloys, have received much attention in both vascular and orthopedic applications due to their superior mechanical properties and biocompatibility. In particular, zinc and its alloys are known as the novel generation of BMMs, owing to their moderate corrosion rates and essential element in the human body [3,9].…”

Section: Introductionmentioning

confidence: 99%

A High-Strength and Biodegradable Zn–Mg Alloy with Refined Ternary Eutectic Structure Processed by ECAP

Huang

Liu

Wang

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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In this study, the microstructure, mechanical properties and corrosion behaviors of a Zn-1.6Mg (wt%) alloy during multipass rotary die equal channel angle pressing (RD-ECAP) processing at 150 °C were systematically investigated. The results indicated that a Zn + Mg 2 Zn 11 + MgZn 2 ternary eutectic structure was formed in as-cast Zn-Mg alloy. After ECAP, the primary Zn matrix turned to fine dynamic recrystallization (DRX) grains, and the network-shaped eutectic structure was crushed into fine particles and blended with DRX grains. Owing to the refined microstructure, dispersed eutectic structure and dynamically precipitated precipitates, the 8p-ECAP alloy possessed the optimal mechanical properties with ultimate tensile strength of 474 MPa and elongation of 7%. Moreover, the electrochemical results showed that the ECAP alloys exhibited similar corrosion rates with that of as-cast alloys in simulated body fluid, which suggests that a high-strength Zn-Mg alloy was successfully developed without sacrifice of the corrosion resistance.

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Effect of Ag on the Microstructure, Mechanical and Bio-corrosion Properties of Fe–30Mn Alloy

Cited by 13 publications

References 32 publications

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Biodegradable Iron-Based Materials—What Was Done and What More Can Be Done?

A High-Strength and Biodegradable Zn–Mg Alloy with Refined Ternary Eutectic Structure Processed by ECAP

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