Effect of Samarium on the Microstructure and Corrosion Resistance of AZ91 Magnesium Alloy Treated by Ultrasonic Vibration

Chen, Yang; Yin, Zhixiang; Yan, Hong; Zhou, Guohua; Wu, Xiaoquan; Hu, Zhi

doi:10.3390/ma11112331

Cited by 14 publications

(6 citation statements)

References 34 publications

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“…It can prevent the penetration of chloride ions into the substrate . The samarium conversion coating and the Sm-incorporated AZ91 alloy showed enhanced corrosion resistance, which is consistent with our results. , …”

Section: Resultsmentioning

confidence: 99%

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Anticancer Activity of Samarium-Coated Magnesium Implants for Immunocompromised Patients

Kannan

Rajendran

2020

ACS Appl. Bio Mater.

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The removal of tumors in the osseous tissue leads to functional disorders. To overcome this issue, biodegradable implants are used to replace the damaged part of the system. In the study, samarium oxide was coated on the anodic layer of AZ31 magnesium alloy. The potentiodynamic polarization, electrochemical impedance, and localized electrochemical impedance spectroscopy studies were carried out for the samarium-coated magnesium alloy. The corrosion resistance of the coating improved several folds than the bare alloy. The apatite formed on the 3rd day of immersion in the simulated body fluid showed cuboid and triangular structures, whereas on the 7th day, it exhibited a sea sponge-like appearance. The coating exhibited inherent anticancer and antibacterial properties. Our work suggests that the samarium coating is expected to be a promising orthopedic implant for preventing tumor relapse and metastasis.

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Section: Resultsmentioning

confidence: 99%

“…22 The samarium conversion coating and the Sm-incorporated AZ91 alloy showed enhanced corrosion resistance, which is consistent with our results. 23,24 3.2.1. Localized Electrochemical Impedance Spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

Anticancer Activity of Samarium-Coated Magnesium Implants for Immunocompromised Patients

Kannan

Rajendran

2020

ACS Appl. Bio Mater.

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“…Regarding its corrosive performance, Dargusch et al [24] reported that the use of the ultrasonic technology refined grain size which then resulted in a lower in corrosion rate in vivo . Additionally, the refining process effectively reduces the Mg 17 Al 12 volume fraction while promoting thinner and smaller intermetallics, contributing to a uniform corrosion layer [25,26].…”

Section: Introductionmentioning

confidence: 99%

Influence of melt treatment of AZ91D alloy on phase morphology and corrosion behaviour in Hank's solution

Grilo

Puga

Fernandes

2021

Corrosion Engineering, Science and Technology

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The AZ91D magnesium alloy was processed with the addition of chemical refinement Al5Ti1B or through ultrasonic melt treatment technique. This paper studies the relationship between the corrosion behaviour and the phase's morphology of the produced samples. Electrochemical impedance spectroscopy was carried out in Hank's solution at 37°C for the assessment of corrosion resistance, demonstrating that this property is heavily affected by the change in morphology provided by the applied methods. Correlation analysis suggests that small concave boundaries of the coarser β-Mg phase have a greater impact on corrosion behaviour rather than the reduction in β-Mg volume fraction or the overall homogenisation of the morphology.

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“…Mg matrix composites that are reinforced by adding particles and whiskers feature a good specific modulus, specific strength, wear resistance, adjustable linear expansion coefficient, and so on. Therefore, they have great potential applications in aerospace, military electronics, automotive, orbital, and other fields [5,6,7,8,9]. Commonly used reinforcing particles and whiskers include: SiCp [10], TiCp [11], B 4 Cp [12], SiCw [13], Ce [14], etc.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, and Mechanical and Wear Properties of Grp/AZ91 Magnesium Matrix Composites

2019

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Based on semi-solid mixing technology, two kinds of as-cast Grp (Graphite particles)/AZ91 composites with different Grp volume fractions (5 vol %, 10 vol %) were prepared; these are called 5 vol % Grp/AZ91 composites and 10 vol % Grp/AZ91 composites, respectively. In order to eliminate casting defects, refine grains, and improve mechanical properties, thermal deformation analysis of these composites was conducted. The effect of the addition of Grp and thermal deformation on the microstructure, mechanical properties, and wear resistance of AZ91 composite was explored. The results showed that after 5 vol % Grp was added into the as-cast AZ91 alloy, Mg17Al12 phases were no longer precipitated reticularly along the grain boundary, and Al4C3 phases were formed inside the composite. With the increase in the volume fraction of Grp, the grains of the AZ91 composites were steadily refined. With the increase of forging pass, the grain size of 5% Grp/AZ91 composites decreased first, and then increased. Additionally, the Grp size decreased gradually. There was little change in the yield strength, and the tensile strength and elongation were improved to a certain extent. After forging and extrusion of 5% Grp/AZ91 composites once, the grain size and Grp size were further reduced, and the yield strength, tensile strength, and elongation were increased by 23%, 30%, and 65%, respectively, compared with the composite after forging. With the increase of the number of forging passes before extrusion, the grain size decreased little by little, while the Grp size remained unchanged. The average yield strength, tensile strength, and elongation of the composites after forging and extrusion six times were increased by 3%, 3%, and 23%, respectively, compared with the composite after forging and extrusion once. The wear rate and friction coefficient of the 5% Grp/AZ91 composites decreased after forging once, and the wear mechanism was mainly due to ploughing wear. By comparison, the wear rate and friction coefficient of the 5% Grp/AZ91 composites increased in the extrusion state, and the main wear mechanism was from wedge formation and micro-cutting wear.

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Effect of Samarium on the Microstructure and Corrosion Resistance of AZ91 Magnesium Alloy Treated by Ultrasonic Vibration

Cited by 14 publications

References 34 publications

Anticancer Activity of Samarium-Coated Magnesium Implants for Immunocompromised Patients

Anticancer Activity of Samarium-Coated Magnesium Implants for Immunocompromised Patients

Influence of melt treatment of AZ91D alloy on phase morphology and corrosion behaviour in Hank's solution

Microstructure, and Mechanical and Wear Properties of Grp/AZ91 Magnesium Matrix Composites

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